Page 1: Service Manual
MX91x and XM91x5 7421-036, -039, -236, -239, -436, -439 Service Manual • Start diagnostics • Maintenance • Safety and notices • Trademarks • Index September 04, 2014 www.lexmark.com P/N 12G3391...
Page 2: Product Information
September 04, 2014 The following paragraph does not apply to any country where such provisions are inconsistent with local law: LEXMARK INTERNATIONAL, INC., PROVIDES THIS PUBLICATION “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
Page 3: Table Of Contents
7421 Table of contents Product information..................2 Edition notice....................2 Notices and safety information..............21 Laser notices............................21 Safety information...........................24 Preface.......................27 Service manual conventions........................27 Change history............................27 General information...................31 Paper and specialty media guide......................31 Using specialty media ............................31 Paper guidelines ...............................33 Supported paper sizes, types, and weights ......................37 Data security notice..........................42 Tools required for service........................43 Diagnostic information................45...
Page 4 7421 Understanding jam messages and locations.....................62 200 paper jams ..............................64 202 paper jams ..............................71 23y paper jams ..............................79 241–242 paper jams ............................82 243–245 paper jams ............................93 28y paper jams ...............................107 Understanding the printer messages....................119 Cartridge low [88.xy]............................119 Cartridge nearly low [88.xy]..........................119 Cartridge very low [88.xy]..........................119 Change [paper source] to [custom string] load [orientation] .................119 Change [paper source] to [custom type name] load [orientation]..............
Page 5 7421 Load Multipurpose Feeder with [custom type name] [paper orientation] ............125 Load Multipurpose Feeder with [paper size] [paper orientation] ..............125 Load Multipurpose Feeder with [paper type] [paper size] [paper orientation] ..........125 Load staples ..............................125 Load staples [G11, G12]..........................126 [x] maintenance kit very low [80.xy].......................126 Memory full [38] .............................126 Memory full, cannot print faxes ........................126 Memory full, cannot send faxes ........................126...
Page 6 7421 Scanner maintenance required, use ADF Kit [80] ...................131 Scanner maintenance required soon, use ADF Kit [80] ..................131 Serial port [x] disabled [56]..........................132 Some held jobs were not restored .........................132 SMTP server not set up. Contact system administrator.................132 Standard network software error [54]......................132 Standard USB port disabled [56]........................132 Supply needed to complete job........................132 The device is operating in Safe Mode.
Page 7 7421 600 errors ...............................180 685 errors ...............................181 Steps before starting the 9yy service checks ....................183 900 errors ...............................185 911–963 errors ...............................190 ADF/scanner hardware errors.......................192 800 error messages............................192 809 error messages............................192 816–824 error messages..........................193 850–891 error messages..........................193 ADF controller board service check ........................194 ADF/scanner image controller board service check ..................195 ADF CIS service check .............................196 Scanner controller board service check......................197...
Page 8 7421 DEVICE TESTS ..............................223 PRINTER SETUP ...............................224 REPORTS .................................226 EVENT LOG..............................226 SCANNER TESTS ..............................227 Exit Diags.................................228 Configuration Menu..........................229 Entering the Configuration menu ........................229 Hole Punch Configuration..........................229 Reset Maintenance Counter ...........................229 USB Scan to Local............................229 Print Quality Pages............................229 Reports ................................230 SIZE SENSING ..............................230 Tray Linking..............................230 Panel Menus ..............................230 PPDS Emulation ..............................231...
Page 9 7421 Exit Config ...............................237 Entering Invalid engine mode........................237 Entering Recovery Mode........................237 Entering Safe Mode (EverReady Mode)....................238 Accessing the Network SE Menu......................238 Service Engineer menu..........................238 Accessing the Service Engineer (SE) Menu .....................238 Service Engineer (SE) Menu ..........................238 Fax Service Engineer (SE) Menu........................239 Repair information...................241 Removal precautions..........................241 Data security notice ............................241...
Page 10 7421 Main power supply removal ...........................275 Printhead removal ............................275 Printhead relay board removal........................276 Right side removals..........................278 Port access door removal ..........................278 Fuser removal ..............................279 Induction heater removal ..........................279 Registration transport assembly........................282 Upper right cover removal..........................283 Redrive belt cover removal..........................283 Redrive belt removal............................284 Transfer roller removal ...........................284 Duplex transport assembly removal .......................285 Duplex transport jam removal knob removal....................286...
Page 11 7421 Registration unit gears removal........................320 Registration unit lock removal........................321 Front side removals..........................323 Control panel frame removal..........................323 Control panel board removal..........................325 Touch screen removal.............................326 Top front door removal ..........................327 Bottom front door removal ..........................327 Front inner cover removal ..........................328 Waste toner door mount removal........................328 Image controller board removal........................329 Door switch removal............................329 Main power switch removal ...........................330...
Page 12 7421 Motor (toner cartridge) removal ........................362 Motor (redrive) removal..........................364 Controller board frame removal........................365 Controller board fan removal .........................366 Motor (transport) removal ..........................367 Motor (developer) removal ..........................368 High voltage board removal ...........................369 Motor (registration) removal..........................370 Motor (feed) removal .............................372 Tray 2 transport drive removal ........................373 Motor (tray 2 transport) removal ........................374 Feed drive assembly removal .........................375 Sensor (tray 1 and 2 paper temperature) removal..................376...
Page 13 7421 ADF separator pad removal ..........................412 ADF separator roller removal .........................412 ADF top cover assembly removal ........................413 ADF top cover removal ...........................413 ADF tray removal ............................414 ADF tray bottom cover removal ........................415 Sensor (ADF CIS clean) removal ........................415 Sensor (ADF jam access cover) removal ......................416 Sensor (ADF scan shaft home) removal ......................417 Sensor (ADF top cover open) removal......................418 Sensor (scan glass clean) removal ........................419...
Page 14 7421 2500‑sheet tray main tray empty sensor bottom actuator removal ..............448 2500‑sheet tray elevator home sensor actuator removal ................449 2500‑sheet tray transfer guide stop removal ....................450 2500‑sheet reserve tray paper limit sensor actuator removal ...............451 2500‑sheet tray vertical media transport guide assembly removal ...............452 2500‑sheet tray transport roller removal .......................453 2500-sheet tray jam access cover removal.....................454 2500-sheet tray jam access door strap removal.....................455...
Page 15 7421 Sensor (2 x 500-sheet tray paper width) removal ..................485 2 x 500-sheet tray feed and transport motors removal .................486 2 x 500-sheet tray controller board removal....................487 2 x 500-sheet tray jam access door removal ....................488 2 x 500-sheet tray rear right cover removal ....................489 2 x 500-sheet tray bottom right cover removal....................490 2 x 500-sheet tray 3 transport assembly removal ..................490 2 x 500-sheet tray 4 transport assembly removal ..................491...
Page 16 7421 Rear view ................................531 Maintenance....................533 Inspection guide............................533 Scheduled maintenance........................534 Maintenance kits ............................534 Resetting the maintenance counter .......................535 Lubrication specification........................535 Cleaning the printer parts........................536 Cleaning the printer ............................536 Cleaning the scanner glass..........................536 Cleaning the charger and the printhead lens ....................537 Emptying the hole punch box .........................540 Parts catalog....................542 Legend..............................542 Assembly 1: Covers 1..........................543...
Page 17 7421 Assembly 23: Registration transport.....................587 Assembly 24: Transfer...........................589 Assembly 25: Registration unit......................591 Assembly 26: Right door transport......................593 Assembly 27: MPF 1..........................595 Assembly 28: MPF 2..........................597 Assembly 29: Duplex 1..........................599 Assembly 30: Duplex 2..........................601 Assembly 31: Fuser..........................603 Assembly 32: Exit 1..........................605 Assembly 33: Exit 2..........................607 Assembly 34: Main and feed drive......................609 Assembly 35: Toner cartridge drive.......................611...
Page 18 7421 Assembly 60: Flatbed scanner 2......................661 Assembly 61: Flatbed scanner 3......................663 Assembly 62: 2 x 500‑sheet tray—Covers.....................665 Assembly 63: 2 x 500‑sheet tray—Frame....................667 Assembly 64: 2 x 500‑sheet tray—Paper feed..................669 Assembly 65: 2 x 500‑sheet tray—Paper size detection...............671 Assembly 66: 2 x 500‑sheet tray—Paper transport................673 Assembly 67: 2 x 500‑sheet tray—Paper pick 1..................675 Assembly 68: 2 x 500‑sheet tray—Paper pick 2..................677 Assembly 69: 2 x 500‑sheet tray—Paper pick 3..................679...
Page 19 7421 Appendix A: Printer specifications............735 Power consumption..........................735 Product power consumption ..........................735 Sleep Mode ..............................735 Hibernate Mode..............................735 Off mode.................................736 Total energy usage............................736 Operating clearances..........................736 Noise emission levels..........................737 Temperature information........................737 Appendix B: Options and features............739 Available internal options........................739 Media handling options.........................739 Appendix C: Theory of operation..............741 POR sequence............................741 Printer control............................741 Print cycle operation..........................741...
Page 20 7421 ADF document registration section ........................767 ADF document scanning section........................767 ADF document exit section..........................769 Flatbed scanner operation........................769 Appendix D: Acronyms................771 Acronyms...............................771 Index......................773 Part number index...................785 Part name index..................805 Table of contents...
Page 21: Notices And Safety Information
7421 Notices and safety information Laser notices Laser notice The printer is certified in the U.S. to conform to the requirements of DHHS 21 CFR, Chapter I, Subchapter J for Class I (1) laser products, and elsewhere is certified as a Class I laser product conforming to the requirements of IEC 60825-1. Class I laser products are not considered to be hazardous.
Page 22 7421 Aviso de láser Esta impresora se ha certificado en EE. UU. de conformidad con los requisitos de DHHS 21 CFR, capítulo I, subcapítulo J, para los productos láser de Clase I (1), y en otros países está certificada como un producto láser de Clase I de acuerdo con los requisitos de IEC 60825-1.
Page 23 7421 Lasermeddelande Skrivaren är certifierad i USA enligt kraven i DHHS 21 CFR, avsnitt I, underavsnitt J för laserprodukter av klass I (1) och i andra länder är den certifierad som en laserprodukt av klass I som uppfyller kraven i IEC 60825-1. Laserprodukter av klass I anses inte vara skadliga.
Page 24: Safety Information
7421 一般认为分类 I 激光产品不具有危险性。本打印机内部含有分类 IIIb（3b）的激光，在操作过程中会产生额定 15 毫瓦的激光，其波长范围在 787–800nm 之间。本激光系统及打印机的设计，在一般操作、使用者维护或规定内的维修情况下，不会使人体接触分类 I 以上等级的辐射。雷射聲明本印表機係經過美國核可，符合 DHHS 21 CFR，Chapter I，Subchapter J 規定的 I (1) 級雷射產品激光注意事项；在美國以外的地區，為符合 IEC 60825-1 規定的 I 級雷射產品。根據 I 級雷射產品的規定，這類產品不會對人體造成傷害。本機所採用之 IIIb (3b) 級雷射只會產生 15 百萬分之一瓦特 (milliwatt)、波長 787 至 800 億分之一米 (nanometer) 的放射線。使用者只要以正確的方法操作及維護保養，並依照先前所述之維修方式進行修護，此印表機與其雷射系統絕不會產生...
Page 25 7421 Norme di sicurezza • La sicurezza del prodotto si basa sui test e sull'approvazione del progetto originale e dei componenti specifici. Il produttore non è responsabile per la sicurezza in caso di sostituzione non autorizzata delle parti. • Le informazioni riguardanti la manutenzione di questo prodotto sono indirizzate soltanto al personale di assistenza autorizzato.
Page 26 7421 • Risco de choques eléctricos e ferimentos graves durante a desmontagem e manutenção deste produto. Os profissionais destes serviços devem estar avisados deste facto e tomar os cuidados necessários. ATENÇÃO — RISCO DE FERIMENTO A bateria de lítio neste produto não deve ser substituída. Existe o risco de explosão se uma bateria de lítio for substituída incorretamente.
Page 27: Preface
7421 Preface This manual contains maintenance procedures for service personnel. It is divided into the following chapters: • General information—Provides a general description of the printer, tools, and equipment needed to service the printer • Diagnostic information—Contains diagnostic aids such as error code tables, symptom and service checks that you can use to isolate failing field replaceable units (FRUs) •...
Page 28 7421 • Part number 40X9999 has been replaced with 40X9215. • Old part number 40X9215 has been replaced with 40X9685. • Updated the Control panel removal topic in the Repair information chapter. • Added the Speaker removal topic in the Repair information chapter. August 27, 2014 •...
Page 29 7421 • Parts catalog FRUs were added. – 40X7104 (Power cord, 2.5 m (right-angled)—USA, Canada, Latin America) – 40X0288 (Power cord, 2.5 m (straight)—Argentina) – 40X1766 (Power cord, 2.5 m (straight)—Bolivia, Peru) – 40X0273 (Power cord, 2.5 m (straight)—Italy, Chile, Uruguay) –...
Page 30 7421 – 40X8313 (Card reader, small snap‑on case) – 40X8314 (Card reader, large snap‑on case) – 40X7858 (Wireless print server kit, MarkNet N8350 802.11b/g/n) – 40X7854 (Fax card) Preface...
Page 31: General Information
7421 General information The Lexmark MX91x MFPs are network‑capable, multifunction laser printers that print monochrome print jobs. All information in this service manual pertains to all models unless explicitly noted. The printers are available in the following models: Model Configurations...
Page 32: Tips On Using Letterhead
• Print samples before buying large quantities. • For more information on label printing, characteristics, and design, see the Card Stock & Label Guide at http://support.lexmark.com. • Use labels designed specifically for laser printers. • Do not use labels with slick backing material.
Page 33: Paper Guidelines
7421 Source Printing Side with the Paper orientation letterhead Trays One‑sided Faceup Load the sheet with the top edge toward the back of the tray. Two‑sided Facedown Load the sheet with the top edge toward the front of the tray. Multipurpose feeder One‑sided Facedown...
Page 34: Moisture Content
7421 Smoothness Paper smoothness directly affects print quality. If paper is too rough, toner cannot fuse to it properly. If paper is too smooth, it can cause paper feeding or print quality issues. Always use paper between 100 and 200 Sheffield points. Moisture content The amount of moisture in paper affects both print quality and the ability of the printer to feed the paper correctly.
Page 35: Using Recycled Paper And Other Office Papers
Lexmark concerns itself with the responsible use of paper in general based on life cycle assessments of its products. To gain a better understanding of the impact of printers on the environment, the company commissioned a number of life cycle assessments and found that paper was identified as the primary contributor (up to 80%) of carbon emissions caused throughout the entire life of a device (from design to end-of-life).
Page 36: Storing Paper
(16 lb) • Multiple part forms or documents For more information about Lexmark, go to www.lexmark.com. General sustainability-related information can be found at the Environmental Sustainability link. Storing paper Use these paper storage guidelines to help avoid jams and uneven print quality: •...
Page 37: Supported Paper Sizes, Types, And Weights
7421 Supported paper sizes, types, and weights The following tables provide information on standard and optional paper sources and the sizes, types, and weights of paper they support. Note: For an unlisted paper size, select the closest larger listed size. Paper sizes supported by the printer Paper sizes supported by the trays and multipurpose feeder Paper size...
Page 38 7421 Paper size Dimensions Standard Standard 2 x 500‑ 2500‑sheet 3000‑sheet Multipurpose Two‑sided 500‑sheet 500‑sheet sheet tray tray printing feeder tray (Tray tray (Tray tray 11 x 17 279.4 x 431.8 mm (11 x 17 in.) Oficio 216 x 340 mm (8.5 x 13.4 in.) Folio 216 x 330 mm...
Page 39 7421 Paper sizes supported by the ADF and scanner glass Paper size Dimensions Scanner glass Business card 3 x 5 76.2 x 127 mm (3 x 5 in.) 4 x 6 101.6 x 152.4 mm (4 x 6 in.) 210 x 297 mm (8.3 x 11.7 in.) 148 x 210 mm (5.8 x 8.3 in.) 105 x 148 mm (4.1 x 5.8 in.) JIS B5...
Page 40 7421 Paper types and weights supported by the printer The printer engine supports 60–256‑g/m (16–68‑lb) paper weights. Note: Labels, transparencies, envelopes, and card stock always print at reduced speed. Paper type Standard Standard 2 x 500- 2500‑sheet 3000‑sheet Multipurpose Scanner 500‑sheet 500‑sheet sheet tray...
Page 41 7421 Supported paper sizes Paper size Staple finisher Staple, hole punch Staple, hole punch Booklet finisher finisher bin 1 finisher bin 2 JIS B5 JIS B4 Executive Letter Legal 12 x 18 11 x 17 SRA3 Oficio Folio Statement Universal Paper is supported only if the finisher stacks the paper but does not staple or punch holes in it.
Page 42: Data Security Notice
7421 Paper type Staple finisher Staple, hole punch finisher Booklet finisher Card Stock Transparency Recycled Glossy Heavy Glossy Labels Bond Envelope Rough Envelope Letterhead Preprinted Colored Paper Light Paper Heavy Paper Rough Cotton Custom Type Print on transparencies by batches of only up to 20 to prevent them from sticking together. For more information, see “Tips on using transparencies”...
Page 43: Tools Required For Service
7421 • Hard disk memory—The printer hard disk is designed for printer-specific functionality and cannot be used for the long‑term storage of data that is not print-related. The hard disk can retain buffered user data from complex print jobs, form data, and font data. To erase volatile memory, turn off the printer.
Page 44 7421...
Page 45: Diagnostic Information
7421 Diagnostic information CAUTION—SHOCK HAZARD: For personal safety and to prevent damage to the printer, remove the power cord from the electrical outlet before you connect or disconnect any cable, electronic board, or assembly. Disconnect any connections between the printer and the computer or peripherals. CAUTION—POTENTIAL INJURY: The printer weight is greater than 18 kg (40 lb) and requires two or more trained personnel to lift it safely.
Page 46: Initial Print Quality Check
7421 • “Toner smear check” on page 57 • “Toner specks check” on page 58 Initial print quality check Before troubleshooting print problems, perform the following: • Clean the photoconductor unit and printhead. For more information, see “Cleaning the charger and the printhead lens”...
Page 47 7421 Actions Step 2 Go to step 3. The problem is solved. Perform print quality calibration. Navigate to: Settings > Print Settings > Quality Menu > Adjust Print Quality Does the problem remain? Step 3 Go to step 4. The problem is solved. Enter the Configuration menu, and then select Print Quality Pages.
Page 48 7421 Actions Step 10 Go to step 11. The problem is solved. Check the following parts for damage or contamination, and replace if necessary. • Transfer roller • Transfer belt • Developer unit Does the problem remain? Step 11 Go to step 12. The problem is solved.
Page 49: Blank Pages Check
7421 Blank pages check Actions Step 1 Go to step 2. The problem is solved. Navigate to Settings > Allow Background Removal. Make sure that the value is set to On. Navigate to Settings > Print Settings > Quality Menu. Decrease the toner darkness (8 is the default value).
Page 50: Solid Black Pages Check
7421 Actions Step 6 Go to step 7. The problem is solved. Make sure that the erase LED is properly installed. Check the LED for damage, and replace if necessary. Does the problem remain? Step 7 Go to step 8. The problem is solved.
Page 51 7421 Actions Step 1 Go to step 2. The problem is solved. Navigate to Settings > Allow Background Removal. Make sure that the value is set to On. Navigate to Settings > Print Settings > Quality Menu. Decrease the toner darkness (8 is the default value). Does the problem remain? Step 2 Go to step 3.
Page 52: Shadow Images Check
7421 Actions Step 7 Go to step 8. The problem is solved. CAUTION—SHOCK HAZARD: Do not perform this step if the printer is on. Make sure that the following cables are properly connected: • High voltage charge cable • High voltage transfer cable •...
Page 53 7421 Actions Step 1 Go to step 2. The problem is solved. Make sure that the paper type and weight are supported. Does the problem remain? Step 2 Go to step 3. The problem is solved. Check the exit roller for wear, damage, or contamination, and replace if necessary.
Page 54: Skewed Print Check
7421 Actions Step 9 Go to step 10. The problem is solved. Replace the sensor (fusing speed). See “Sensor (fusing speed) removal” on page 317. Does the problem remain? Step 10 Contact the next level The problem is solved. of support. Make sure that the fuser and its cable are properly connected.
Page 55: Streaked Horizontal Or Vertical Lines Check
7421 Actions Step 4 Go to step 5. The problem is solved. Check the registration belt for proper tension, and adjust if necessary. Check the registration gear and belt for wear or damage, and replace if necessary. See “Registration unit belt removal” on page 319 “Registration unit gears removal”...
Page 56 7421 Actions Step 2 Go to step 3. The problem is solved. Make sure that the toner cartridge supply is not low. Check the photoconductor for contamination or damage, and replace if necessary. Does the problem remain? Step 3 Go to step 4. Go to step 5.
Page 57: Toner Smear Check
7421 Actions Step 7 Go to step 8. The problem is solved. CAUTION—SHOCK HAZARD: Do not perform this step if the printer is on. Make sure that the high voltage board cables are properly connected. Check the high voltage board for damage, and replace if necessary. Does the problem remain? Step 8 Contact the next level...
Page 58: Toner Specks Check
7421 Actions Step 4 Go to step 5. The problem is solved. Make sure that the induction heater is properly installed. Reseat the heater cable. Check the heater and its cable for damage, and replace if necessary. “Induction heater removal” on page 279.
Page 59: Fixing Image Quality Issues
7421 Actions Step 3 Go to step 4. Go to step 5. Enter the Diagnostics menu, and then navigate to: PRINTER SETUP > Printed Page Count Does the page count reach 300K or 600K? Step 4 Go to step 5. The problem is solved.
Page 60: Flatbed Scanner Image Quality Check
7421 Flatbed scanner image quality check Actions Step 1 Go to step 2. The problem is solved. Check the ADF cushion for dust, crease marks, or damage, and replace if necessary. Does the problem remain? Step 2 Go to step 3. The problem is solved.
Page 61: Paper Jams
7421 Actions Step 9 Go to step 10. The problem is solved. Check the scanner CCD lens for proper alignment, and adjust if necessary. Does the problem remain? Step 10 Go to step 11. The problem is solved. Make sure that the scanner sensor cable is properly installed. Check the cable for damage, and replace if necessary.
Page 62: Avoiding Jams
7421 Avoiding jams Load paper properly • Make sure that the paper lies flat in the tray. • Do not remove a tray while the printer is printing. • Do not load a tray while the printer is printing. Load it before printing, or wait for a prompt to load it. •...
Page 63 7421 Notes: • When Jam Assist is set to On, the printer flushes blank pages or pages with partial prints after a jammed page has been cleared. Check your printed output for blank pages. • When Jam Recovery is set to On or Auto, the printer reprints jammed pages. However, the Auto setting reprints jammed pages only if adequate printer memory is available.
Page 64: Paper Jams
7421 Area name Control panel message What to do Door D, trays [x]‑page jam, open door D and clear all Open door D, and then remove the jammed jammed paper. [24y.xx] paper. Pull out the tray, and then remove the [x]‑page jam, slide the 3000‑sheet tray and jammed paper.
Page 65 7421 Flex the sheets back and forth to loosen them, and then fan them. Do not fold or crease the paper. Straighten the edges on a level surface. Reload the paper. 200 paper jam messages Error code Description Action 200.06 The sensor (registration) did not detect the paper fed “MPF jam service check”...
Page 66 7421 Action Step 3 Go to step 4. The problem is solved. Check the registration sensor actuator for damage, and replace if necessary. Does the problem remain? Step 4 Go to step 5. Go to step 7. Check the sensor (registration). Is it free of damage? Step 5 Go to step 8.
Page 67 7421 Action Step 12 Go to step 13. The problem is solved. Reseat the registration motor cable. Check the cable for damage, and replace if necessary. Does the problem remain? Step 13 Go to step 14. The problem is solved. Check the registration belt for proper tension, and adjust if necessary.
Page 68 7421 Action Step 19 Go to step 20. The problem is solved. Make sure that the registration transport assembly is properly installed. Make sure that the assembly is clear of obstructions. Check the assembly for damage, and replace if necessary. See “Registration transport assembly”...
Page 69 7421 Action Step 4 Go to step 5. Go to step 7. Check the sensor (MPF empty). Is it free of damage? Step 5 Go to step 6. Go to step 8. Enter the Diagnostics menu, and then navigate to: SENSOR TESTS >...
Page 70 7421 Action Step 12 Go to step 14. Go to step 13. Observe the MPF lift plate clutch. Is it working properly? Step 13 Go to step 14. The problem is solved. Reseat the MPF lift plate clutch cable. Check the cable for damage, and replace if necessary. Does the problem remain? Step 14 Go to step 15.
Page 71: 202 Paper Jams
7421 Action Step 21 Go to step 22. The problem is solved. Check the paper feed belt for proper tension, and adjust if necessary. Check the paper feed gear and belt for wear or damage, and replace if necessary. Does the problem remain? Step 22 Go to step 23.
Page 72 7421 • Fuser area • Below the fuser area • Duplex area • Above the duplex area Diagnostic information...
Page 73 7421 Open the standard trays, and then locate the jammed paper. Remove the jammed paper. Note: Make sure that all paper fragments are removed. Close the trays and door C. [x]‑page jam, slide the 3000‑sheet tray and open door C. [2yy.xx] Slide the 3000‑sheet tray.
Page 74 7421 Open door C. Make sure that it does not hit any cable attached to the printer. Remove the jammed paper from any of the following locations: Note: Make sure that all paper fragments are removed. CAUTION—HOT SURFACE: The inside of the printer might be hot. To reduce the risk of injury from a hot component, allow the surface to cool before touching it.
Page 75 7421 • Duplex area • Above the duplex area Open the standard trays, and then locate the jammed paper. Remove the jammed paper. Note: Make sure that all paper fragments are removed. Close the trays and door C. Slide the 3000‑sheet tray back into place. Diagnostic information...
Page 76 7421 202 paper jam messages Error code Description Action 202.91 The paper remains detected at the sensor “Exit jam service check” on page (exit) after the printer is turned on. 202.93 The sensor (fuser exit) did not detect the paper. 202.95 The paper remains detected at the sensor (fuser exit) during a print job.
Page 77 7421 Action Step 7 Go to step 8. The problem is solved. Replace the sensor (exit). Does the problem remain? Step 8 Go to step 9. Go to step 10. Enter the Diagnostics menu, and then navigate to: INPUT TRAY TESTS > Feed Tests > Tray 1 Does the leading edge of the paper reach the fuser? Step 9 Go to step 14.
Page 78 7421 Action Step 15 Go to step 16. The problem is solved. Make sure that the duplex transport assembly is properly installed. Make sure that the assembly is clear of obstructions. Does the problem remain? Step 16 Go to step 17. The problem is solved.
Page 79: 23Y Paper Jams
7421 Action Step 23 Go to step 24. The problem is solved. Check the redrive belt for proper tension, and adjust if necessary. Check the redrive gear and belt for wear or damage, and replace if necessary. Does the problem remain? Step 24 Go to step 25.
Page 80 7421 Duplex jam service check Action Step 1 Go to step 2. Go to step 5. Enter the Diagnostics menu, and then navigate to: EVENT LOG > Display Log Do most of the recent error codes end with a 1? (Example: 241.11, 200.91) Step 2 Go to step 3.
Page 81 7421 Action Step 8 Go to step 9. The problem is solved. Make sure that the duplex transport assembly is properly installed. Make sure that the assembly is clear of obstructions. Does the problem remain? Step 9 Go to step 10. The problem is solved.
Page 82: 241-242 Paper Jams
7421 Action Step 16 Go to step 17. The problem is solved. Check the transport motor belt for proper tension, and adjust if necessary. Check the transport motor gear and belt for wear or damage, and replace if necessary. Does the problem remain? Step 17 Go to step 18.
Page 83 7421 Open the optional tray, and then locate the jammed paper. Remove the jammed paper. Note: Make sure that all paper fragments are removed. Close the tray and door D. 241–242 paper jam messages Error code Description Action 241.11 The paper remains detected at the sensor “Tray 1 feed jam service check”...
Page 84 7421 Tray 1 feed jam service check Action Step 1 Go to step 2. Go to step 7. Enter the Diagnostics menu, and then navigate to: EVENT LOG > Display Log Do most of the recent error codes end with a 1? (Example: 241.11, 200.91) Step 2 Go to step 3.
Page 85 7421 Action Step 9 Go to step 13. Go to step 10. Enter the Diagnostics menu, and then navigate to: MOTOR TESTS > PRINTER MOTOR TESTS > Paper feed Does the motor run? Step 10 Go to step 11. The problem is solved. Reseat the feed motor cable.
Page 86 7421 Action Step 16 Go to step 17. The problem is solved. Check the registration belt for proper tension, and adjust if necessary. Check the registration gear and belt for wear or damage, and replace if necessary. See “Registration unit belt removal” on page 319 “Registration unit gears removal”...
Page 87 7421 Tray 2 feed jam service check Action Step 1 Go to step 2. Go to step 7. Enter the Diagnostics menu, and then navigate to: EVENT LOG > Display Log Do most of the recent error codes end with a 1? (Example: 241.11, 200.91) Step 2 Go to step 3.
Page 88 7421 Action Step 9 Go to step 10. The problem is solved. Check the tray 2 feed, pick, and separator rollers for damage, and replace if necessary. Note: If the page count is over 50K, then clean the rollers. Does the problem remain? Step 10 Go to step 14.
Page 89 7421 Action Step 17 Go to step 18. The problem is solved. Check the transport drive belt for proper tension, and adjust if necessary. Check the transport drive assembly for wear or damage, and replace if necessary. Does the problem remain? Step 18 Go to step 19.
Page 90 7421 2 x 500‑sheet tray 3 transport jam service check Action Step 1 Go to step 2. The problem is solved. Make sure that the paper path between tray 2 and tray 3, including the sensors, are free of debris or dust. Does the problem remain? Step 2 Go to step 3.
Page 91 7421 Action Step 9 Go to step 10. The problem is solved. Reseat the motor cable. Check the cable for damage, and replace if necessary. Does the problem remain? Step 10 Go to step 11. The problem is solved. Check the tray 3 transport belt for proper tension, and adjust if necessary.
Page 92 7421 Action Step 2 Go to step 3. Go to step 4. Remove the rear cover. Make sure that the sensor (3000-sheet tray set) is properly installed. Make sure that the sensor is free of debris or dust. Reseat the cable on the sensor and the cable CN5 on the controller board.
Page 93: 243-245 Paper Jams
7421 243–245 paper jams [x]‑page jam, slide the 3000‑sheet tray and open door D. [24y.xx] Slide the 3000‑sheet tray. Open door D, and then remove the jammed paper. Note: Make sure that all paper fragments are removed. Open the optional tray, and then locate the jammed paper. Remove the jammed paper.
Page 94 7421 Close the tray and door D. Slide the 3000‑sheet tray back into place. 243 paper jam messages Error code Description Action 243.31 2 x 500‑sheet tray: The paper remains “2 x 500‑sheet tray 3 jam service check” on page detected at the sensor (tray 3 feed) after the printer is turned on.
Page 95 7421 244 paper jam messages Error code Description Action 244.41 The paper remains detected at the sensor “2 x 500‑sheet tray 4 jam service check” on page 100. (tray 4 feed) after the printer is turned on. 244.46 The sensor (tray 4 transport) did not detect “2 x 500‑sheet tray 4 jam service check”...
Page 96 7421 Actions Step 4 Go to step 13. Go to step 5. Enter the Diagnostics menu, and then navigate to: SENSOR TESTS > 2500-Sheet Tray Sensor Tests Does the sensor status change while toggling the sensor? Step 5 Go to step 6. The problem is solved.
Page 97 7421 Actions Step 11 Go to step 12. The problem is solved. Check the 2500-sheet tray feed and transport motor belt for proper tension, and adjust if necessary. Check the 2500-sheet tray feed and transport motor belt and gears for wear or damage, and replace if necessary. Does the problem remain? Step 12 Go to step 13.
Page 98 7421 2 x 500‑sheet tray 3 jam service check Action Step 1 Go to step 2. Go to step 7. Enter the Diagnostics menu, and then navigate to: EVENT LOG > Display Log Do most of the recent error codes end with a 1? (Example: 241.11, 200.91) Step 2 Go to step 3.
Page 99 7421 Action Step 9 Go to step 17. Go to step 10. Enter the Diagnostics menu, and then navigate to: MOTOR TESTS > 2 x 500-Sheet Tray Motor Tests > Tray 3 feed Does the motor run? Step 10 Go to step 11. The problem is solved.
Page 100 7421 Action Step 17 Contact the next level The problem is solved. of support. Check the 2 x 500‑sheet tray controller board pins for damage, and replace if necessary. See “2 x 500-sheet tray controller board removal” on page 487. Does the problem remain? 2 x 500‑sheet tray 4 jam service check Action...
Page 101 7421 Action Step 7 Go to step 13. Go to step 8. Enter the Diagnostics menu, and then navigate to: INPUT TRAY TESTS > Feed Tests > Tray 4 Does the leading edge of the paper reach the sensor (2 x 500‑sheet tray 4 paper feed)? Step 8 Go to step 9.
Page 102 7421 Action Step 15 Go to step 16. The problem is solved. Reseat the sensor cable. Check the cable for damage, and replace if necessary. Does the problem remain? Step 16 Go to step 17. The problem is solved. Replace the sensor (2 x 500‑sheet tray 4 transport). See “2 x 500-sheet tray transport assembly sensors removal”...
Page 103 7421 Action Step 5 Go to step 6. The problem is solved. Reseat the sensor cable. Check the cable for damage, and replace if necessary. Does the problem remain? Step 6 Go to step 7. The problem is solved. Replace the sensor (tray 3 transport). See “2 x 500-sheet tray transport assembly sensors removal”...
Page 104 7421 Action Step 12 Contact the next level The problem is solved. of support. Check the 2 x 500‑sheet tray controller board pins for damage, and replace if necessary. See “2 x 500-sheet tray controller board removal” on page 487. Does the problem remain? 3000‑sheet tray feed jam service check Action...
Page 105 7421 Action Step 4 Go to step 5. Go to step 6. Make sure that the following sensors are properly installed: • Sensor (3000-sheet tray elevator level) • Sensor (3000-sheet tray empty) • Sensor (3000-sheet tray feed) Make sure that the sensors are free of debris or dust. Reseat the cable on the sensors and the cable CN5 on the controller board.
Page 106 7421 Action Step 10 Go to step 11. The problem is solved. Reseat the cable on the rest of the sensors. Reseat the cable CN5 on the controller board. If necessary, reseat all the junction connectors on the cables. Make sure that the cables do not block the path of moving parts. Check the cables for damage, and replace if necessary.
Page 107: 28Y Paper Jams
7421 Action Step 4 Go to step 5. The problem is solved. Replace the sensor. See “Sensor (3000-sheet tray feed) removal” on page 512. Does the problem remain? Step 5 Go to step 6. The problem is solved. Reseat the cable on all of the sensors. Reseat the cable CN5 on the controller board.
Page 108 7421 Close the cover. Open the scanner cover, and then open the bottom ADF door. Remove jammed paper. Note: Make sure that all paper fragments are removed. Diagnostic information...
Page 109 7421 Close the door. Close the scanner cover. 28y paper jam messages Error code Description Action 280.13 The sensor (ADF registration) did not detect “ADF registration jam service check” on page 110. the paper. 280.15 The paper remains detected at the sensor (ADF registration) during a job.
Page 110 7421 Error code Description Action 283.11 The paper remains detected at the sensor “ADF scan jam service check” on page 116. (ADF scan) after the printer is turned on. 283.12 The paper was detected earlier than expected at the sensor (ADF scan). 283.13 The sensor (ADF scan) did not detect the paper after registration.
Page 111 7421 Actions Step 7 Go to step 8. The problem is solved. Check the ADF registration rollers for wear or damage, and replace if necessary. Does the problem remain? Step 8 Go to step 9. The problem is solved. Make sure that the roller belts have proper belt tension. Check the roller belts for wear or damage, and replace if necessary.
Page 112 7421 Actions Step 13 Go to step 14. The problem is solved. Replace the motor (ADF registration). See “Motor (ADF registration) removal” on page 436. Does the problem remain? Step 14 Go to step 15. The problem is solved. Make sure that the blue screws and marked screws along the paper path are tightened.
Page 113 7421 Actions Step 4 Go to step 5. The problem is solved. Check the sensor actuators for damage and proper operation, and replace if necessary. Does the problem remain? Step 5 Go to step 8. Go to step 6. Enter the Diagnostics menu, and then navigate to: SCANNER TESTS >...
Page 114 7421 Actions Step 10 Got to step 12. Go to step 11. Remove the ADF rear cover and locate the motor drive. Open the ADF top cover. Bypass the sensor (ADF top cover open) and observe if the ADF feed drive gear rotates.
Page 115 7421 ADF exit jam service check Actions Step 1 Go to step 2. Go to step 3. Enter the Diagnostics menu, and then navigate to: EVENT LOG > Display Log Does the error log show persistent 282.x1 jam? Step 2 Go to step 3.
Page 116 7421 Actions Step 9 Go to step 10. The problem is solved. Make sure that the blue screws and marked screws along the paper path are tightened. Does the problem remain? Step 10 Go to step 11. The problem is solved. Check the ADF controller board for damaged pins, and replace if necessary.
Page 117 7421 Actions Step 5 Go to step 6. The problem is solved. Check the sensor (ADF scan) for damage, and replace if necessary. Does the problem remain? Step 6 Go to step 8. Go to step 7. Enter the Diagnostics menu, and then navigate to: SCANNER TESTS >...
Page 118 7421 Actions Step 13 Go to step 14. The problem is solved. Remove the ADF rear cover. Reseat the CIS glass clean motor cable. Check the motor cable for damage, and replace if necessary. Does the problem remain? Step 14 Go to step 15.
Page 119: Understanding The Printer Messages
7421 Understanding the printer messages Cartridge low [88.xy] You may need to order a replacement toner cartridge. If necessary, touch Continue on the printer control panel to clear the message and continue printing. Cartridge nearly low [88.xy] If necessary, touch Continue on the printer control panel to clear the message and continue printing. Cartridge very low [88.xy] You may need to replace the toner cartridge very soon.
Page 120: Change [Paper Source] To [Paper Type] [Paper Size] Load [Orientation]
7421 Change [paper source] to [paper type] [paper size] load [orientation] Try one or more of the following: • Load the correct size and type of paper in the tray or feeder, specify the paper size and type in the Paper menu on the control panel, and then touch Finished changing paper.
Page 121: Disk Full, Scan Job Canceled
7421 • Delete fonts, macros, and other data stored in the printer hard disk. • Install a hard disk with larger capacity. Disk full, scan job canceled Try one or more of the following: • Touch Continue to clear the message and continue scanning. •...
Page 122: Fax Partition Inoperative. Contact System Administrator
7421 Fax partition inoperative. Contact system administrator. Try one or more of the following: • From the printer control panel, touch Continue to clear the message. • Turn off the printer, and then turn it back on. If the message appears again, then contact your system support person.
Page 123: Insert Tray [X]
7421 Insert Tray [x] Try one or more of the following: • Insert the specified tray into the printer. • Cancel the print job. • Reset the active bin for a linked set of bins by selecting Reset active bin on the printer control panel. Insufficient memory for Flash Memory Defragment operation [37] Try one or more of the following: •...
Page 124: Load [Paper Source] With [Custom String] [Paper Orientation]
7421 Load [paper source] with [custom string] [paper orientation] Try one or more of the following: • Load the tray or feeder with the correct size and type of paper, and then touch Finished loading paper on the control panel. •...
Page 125: Load Multipurpose Feeder With [Custom Type Name] [Paper Orientation]
7421 Load Multipurpose Feeder with [custom type name] [paper orientation] Try one or more of the following: • Load the feeder with the correct size and type of paper. • From the control panel, touch one of the following: – Prompt each page, paper loaded or Do not prompt, paper loaded—To clear the message and continue printing.
Page 126: Load Staples [G11, G12]
[x] maintenance kit very low [80.xy] You may need to replace the maintenance kit very soon. For more information, go to http://support.lexmark.com contact customer support, and then report the message. If necessary, touch Continue to clear the message and continue printing.
Page 127: Not Enough Free Space In Flash Memory For Resources [52]
7421 • Update the network firmware in the printer or print server. For more information, go to http://support.lexmark.com. Not enough free space in flash memory for resources [52] Try one or more of the following: • From the control panel, touch Continue to clear the message and continue printing.
Page 128: Reinstall Missing Or Unresponsive Cartridge [31.Xy]
7421 For more information, visit http://support.lexmark.com or contact customer support. Reinstall missing or unresponsive cartridge [31.xy] Try one or more of the following: • Check if the toner cartridge is missing. If missing, install the toner cartridge. For information on installing the cartridge, see the “Replacing supplies” section of the User’s Guide.
Page 129: Remove Paper From [Linked Set Bin Name]
“Replacing supplies” section of the User’s Guide. Note: If you do not have a replacement cartridge, then see the “Ordering supplies” section of the User’s Guide or visit www.lexmark.com. Replace cartridge, printer region mismatch [42.xy] Install a toner cartridge that matches the region number of the printer.
Page 130: Replace Jammed Originals If Restarting Job
Touch Restart job to restart the scan job with the same settings from the previous scan job. Replace [x] maintenance kit, 0 estimated pages remain [80.xy] The printer is scheduled for maintenance. For more information, go to http://support.lexmark.com or contact your service representative, and then report the message.
Page 131: Replace Unsupported Cartridge [32.Xy]
Guide. Note: If you do not have a replacement cartridge, then see the “Ordering supplies” section of the User’s Guide or visit www.lexmark.com. Replace unsupported photoconductor [32.xy] Remove the photoconductor unit, and then install a supported one to clear the message and continue printing.
Page 132: Serial Port [X] Disabled [56]
Turn off the printer, and then turn it back on. • Update the network firmware in the printer or print server. For more information, go to http://support.lexmark.com or contact customer support, and then report the message. Standard USB port disabled [56] Try one or more of the following: •...
Page 133: The Device Is Operating In Safe Mode. Some Print Options May Be Disabled Or Provide Unexpected Results
7421 The device is operating in Safe Mode. Some print options may be disabled or provide unexpected results. Touch Continue on the control panel to clear the message and continue printing. Too many flash options installed [58] Try one or more of the following: •...
Page 134: Unsupported Option In Slot [X] [55]
7421 Unsupported option in slot [x] [55] Turn off the printer. Unplug the power cord from the electrical outlet. Remove the unsupported option card from the printer controller board, and then replace it with a supported card. Connect the power cord to a properly grounded electrical outlet. Turn the printer back on.
Page 135: Cartridge Or Photoconductor Error Service Check
7421 Error code Description Action The flash memory is defective. “Flash memory failure service check” on page 138. The flash memory is insufficient. “Insufficient flash memory service check” on page 139. Unformatted flash was detected. “Flash memory failure service check” on page 138.
Page 136: Mismatched Paper Size Service Check
7421 Action Step 2 Go to step 3. The problem is solved. Make sure that the cartridge or photoconductor is properly installed. Make sure that the cartridge or photoconductor cables are properly connected. Does the problem remain? Step 3 Go to step 4. The problem is solved.
Page 137: Insufficient Memory Service Check
7421 Action Step 5 Contact the next level The problem is solved. of support. Check the controller board pins for damage, and replace if necessary. See “Controller board removal” on page 356. Does the problem remain? Insufficient memory service check Action Step 1 Go to step 2.
Page 138: Ppds Font Error Service Check
7421 Action Step 3 Go to step 4. The problem is solved. If applicable, install extra memory card. If applicable, make sure that the additional memory card is properly installed. Does the problem remain? Step 4 Contact the next level The problem is solved.
Page 139: Insufficient Flash Memory Service Check
7421 Action Step 3 Go to step 4. The problem is solved. Check the controller board pins for damage, and replace if necessary. See “Controller board removal” on page 356. Does the problem remain? Step 4 Contact the next level The problem is solved.
Page 140: Network Service Check
Make sure that there is no electronic interference in the wireless network. Have the network administrator check that the printer is using the correct SSID, and wireless security protocols. For more network troubleshooting information, consult the Lexmark Network Setup Guide.
Page 141 7421 Actions Step 9 Go to step 11. Go to step 10. Have the network administrator check if the printer and computer IP address have identical subnet addresses. Are the subnet addresses the same? Step 10 Go to step 11. The problem is solved.
Page 142: Unsupported Internal Option Service Check
7421 Actions Step 19 Go to step 20. The problem is solved. If there is an attached antenna, check it for damage, and replace if necessary. Does the problem remain? Step 20 Go to step 21. The problem is solved. Make sure that the antenna is properly connected to the wireless card.
Page 143: Disabled Port Service Check
7421 Disabled port service check Action Step 1 Go to step 2. The problem is solved. Make sure that the cables connected to ports are properly installed. Check the cables for damage, and replace if necessary. Does the problem remain? Step 2 Go to step 3.
Page 144: Excess Options Service Check
7421 Action Step 3 Go to step 4. The problem is solved. If applicable, remove all internal options. Reset the printer, and then resend the print job. Does the problem remain? Step 4 Contact the next level The problem is solved. of support.
Page 145: Incompatible Hardware Option Service Check
Go to step 3. The problem is solved. Make sure that the firmware version is the latest. Note: The latest firmware versions are available on the Technical service bulletins at support.lexmark.com. Does the problem remain? Step 3 Go to step 4.
Page 146: Maintenance Kit Service Check
7421 Action Step 4 Go to step 5. The problem is solved. Make sure that the hard disk is properly installed. Check the hard disk for damage, and replace if necessary. Does the problem remain? Step 5 Contact the next level The problem is solved.
Page 147: 111 Errors
7421 111 errors 111 error messages Error code Description Action 111.01 The printhead motor malfunctioned. “Printhead failure service check” on page 147. 111.06 The printhead laser malfunctioned. Printhead failure service check Action Step 1 Go to step 2. The problem is solved. Enter the Diagnostics menu, and then navigate to: PRINTER SETUP >...
Page 148: 12Y Errors
7421 12y errors 12y error messages Error code Description Action 120.00 The motor (fuser) did not run. “Motor (fuser) failure service check” on page 148. 120.06 The motor (fuser) did not run at the correct timing. 121.02 The fuser temperature did not reach the required “Fuser temperature failure service check”...
Page 149 7421 Action Step 3 Go to step 7. Go to step 4. Enter the Diagnostics menu, and then navigate to: MOTOR TESTS > PRINTER MOTOR TESTS > Fusing tray Does the motor run? Step 4 Go to step 5. The problem is solved. Reseat the fuser motor cable.
Page 150 7421 Action Step 11 Go to step 12. The problem is solved. Replace the sensor (fusing speed). See “Sensor (fusing speed) removal” on page 317. Does the problem remain? Step 12 Contact the next level The problem is solved. of support. Check the controller board pins for damage, and replace if necessary.
Page 151 7421 Action Step 6 Go to step 7. The problem is solved. Make sure that the paper exit fan cable is properly connected. Check the paper exit fan for damage, and replace if necessary. See “Paper exit fan removal” on page 360.
Page 152 7421 Fuser roller pressure failure service check Action Step 1 Go to step 2. The problem is solved. Enter the Diagnostics menu, and then navigate to: PRINTER SETUP > Reset Engine Service Error Does the problem remain? Step 2 Go to step 3. The problem is solved.
Page 153: 13Y Errors
7421 Action Step 9 Contact the next level The problem is solved. of support. Check the engine controller board pins for damage, and replace if necessary. See “Engine controller board removal” on page 353. Does the problem remain? 13y errors 13y error messages Error code Description...
Page 154 7421 Action Step 5 Go to step 6. The problem is solved. Make sure that the toner is properly installed. Make sure that the toner is supported. Does the problem remain? Step 6 Go to step 7. The problem is solved. Make sure that the sensor (toner density) is free of dust or debris.
Page 155 7421 Action Step 12 Go to step 13. The problem is solved. Make sure that the toner cartridge motor cable is properly connected. Check the motor (toner cartridge) and its cable for damage, and replace if necessary. See “Motor (toner cartridge) removal” on page 362.
Page 156: 153 Errors
7421 Action Step 5 Go to step 6. The problem is solved. Replace the motor (developer). See “Motor (developer) removal” on page 368. Does the problem remain? Step 6 Go to step 9. Go to step 7. Check the developer for proper operation. Is it working properly? Step 7 Go to step 8.
Page 157: 16Y Errors
7421 Motor (transport) failure service check Action Step 1 Go to step 2. The problem is solved. Enter the Diagnostics menu, and then navigate to: PRINTER SETUP > Reset Engine Service Error Does the problem remain? Step 2 Go to step 6. Go to step 3.
Page 158 7421 Error code Description Action 164.04 The motor (tray 4 feed) did not reach the required “2 x 500-sheet tray 4 feed failure service speed. check” on page 161. 167.04 The motor (tray 3 transport) did not reach the “2 x 500-sheet tray 3 transport failure service required speed.
Page 159 7421 Actions Step 5 Contact the next level The problem is solved. of support. Check the 2500-sheet tray controller board pins for damage, and replace if necessary. See “2500-sheet tray controller board removal” on page 443. Does the problem remain? 2500-sheet tray transport failure service check Actions Step 1...
Page 160 7421 2 x 500-sheet tray 3 feed failure service check Actions Step 1 Go to step 2. The problem is solved. Enter the Diagnostics menu, and then navigate to: PRINTER SETUP > Reset Engine Service Error Does the problem remain? Step 2 Go to step 3.
Page 161 7421 2 x 500-sheet tray 4 feed failure service check Actions Step 1 Go to step 2. The problem is solved. Enter the Diagnostics menu, and then navigate to: PRINTER SETUP > Reset Engine Service Error Does the problem remain? Step 2 Go to step 3.
Page 162 7421 2 x 500-sheet tray 3 transport failure service check Actions Step 1 Go to step 2. The problem is solved. Enter the Diagnostics menu, and then navigate to: PRINTER SETUP > Reset Engine Service Error Does the problem remain? Step 2 Go to step 3.
Page 163: 171-182 Errors
7421 2 x 500-sheet tray 4 transport failure service check Actions Step 1 Go to step 2. The problem is solved. Enter the Diagnostics menu, and then navigate to: PRINTER SETUP > Reset Engine Service Error Does the problem remain? Step 2 Go to step 3.
Page 164: Errors
7421 Fan failure service check Action Step 1 Go to step 2. The problem is solved. Enter the Diagnostics menu, and then navigate to: PRINTER SETUP > Reset Engine Service Error Does the problem remain? Step 2 Go to step 3. The problem is solved.
Page 165 7421 2 x 500-sheet tray communication error service check Actions Step 1 Go to step 2. The problem is solved. Enter the Diagnostics menu, and then navigate to: PRINTER SETUP > Reset Engine Service Error Does the problem remain? Step 2 Go to step 3.
Page 166: 19Y Errors
7421 2500-sheet tray communication error service check Actions Step 1 Go to step 2. The problem is solved. Enter the Diagnostics menu, and then navigate to: PRINTER SETUP > Reset Engine Service Error Note: Do this step every time a service error would occur to clear the error and restore the engine settings.
Page 167: 196–197 Error Messages
7421 196–197 error messages Error code Description Action 196.10 The 2500-sheet tray lift plate did not move to the “2500-sheet tray lift plate failure service check” correct position. on page 177. 196.11 The 2500-sheet tray transfer guide did not move to the “2500-sheet tray transfer guide motor failure correct position.
Page 168 7421 Action Step 5 Go to step 6. The problem is solved. Check the MPF lift plate solenoid, including the actuator for wear or damage, and replace if necessary. See “MPF lift plate solenoid removal” on page 301. Does the problem remain? Step 6 Go to step 8.
Page 169 7421 Action Step 14 Go to step 15. The problem is solved. Reseat the feed motor cable. Check the cable for damage, and replace if necessary. Does the problem remain? Step 15 Go to step 16. The problem is solved. Check the paper feed belt for proper tension, and adjust if necessary.
Page 170 7421 Action Step 3 Go to step 4. The problem is solved. Reseat the tray 1 lift motor cable. Check the cable for damage, and replace if necessary. Does the problem remain? Step 4 Go to step 5. The problem is solved. Replace the motor (tray 1 lift).
Page 171 7421 Tray 2 lift plate failure service check Action Step 1 Go to step 2. The problem is solved. Enter the Diagnostics menu, and then navigate to: PRINTER SETUP > Reset Engine Service Error Does the problem remain? Step 2 Go to step 5.
Page 172 7421 Action Step 9 Go to step 10. The problem is solved. Replace the sensor (tray 2 lift plate level). Does the problem remain? Step 10 Contact the next level The problem is solved. of support. Check the engine controller board pins for damage, and replace if necessary.
Page 173 7421 Action Step 7 Go to step 10. Go to step 8. Enter the Diagnostics menu, and then navigate to: SENSOR TESTS > 2 x 500-Sheet Tray Sensor Tests > Tray 3 lift plate limit Does the sensor status change while toggling the sensor? Step 8 Go to step 9.
Page 174 7421 Action Step 4 Go to step 5. The problem is solved. Replace the motor. See “Motor (2 x 500-sheet tray lift) removal” on page 483. Does the problem remain? Step 5 Go to step 6. The problem is solved. Make sure that the tray 4 tray set actuator is properly installed.
Page 175 7421 3000‑sheet tray elevator failure service check Action Step 1 Go to step 2. The problem is solved. Make sure that the tray is properly installed and aligned to the printer. Reseat the interface cable that is plugged into the 2500‑ or 2 x 500‑sheet tray.
Page 176 7421 Induction heater failure service check Action Step 1 Go to step 2. The problem is solved. Enter the Diagnostics menu, and then navigate to: PRINTER SETUP > Reset Engine Service Error Does the problem remain? Step 2 Go to step 3. The problem is solved.
Page 177 7421 2500-sheet tray lift plate failure service check Actions Step 1 Go to step 2. The problem is solved. Enter the Diagnostics menu, and then navigate to: PRINTER SETUP > Reset engine Service Error Note: Do this step every time a service error would occur to clear the error and restore the engine settings.
Page 178 7421 Actions Step 7 Go to step 9. Go to step 8. Enter the Diagnostics menu, and then navigate to: SENSOR TESTS > 2500-Sheet Tray Sensor Tests Does the sensor status change while toggling the sensor? Step 8 Go to step 9. The problem is solved.
Page 179 7421 2500-sheet tray transfer guide motor failure service check Actions Step 1 Go to step 2. The problem is solved. Enter the Diagnostics menu, and then navigate to: PRINTER SETUP > Reset engine Service Error Note: Do this step every time a service error would occur to clear the error and restore the engine settings.
Page 180: 600 Errors
7421 Actions Step 7 Go to step 9. Go to step 8. Enter the Diagnostics menu, and then navigate to: SENSOR TESTS > 2500-Sheet Tray Sensor Tests Does the sensor status change while toggling the sensor? Step 8 Go to step 9. The problem is solved.
Page 181: Errors
7421 Unready image service check Action Step 1 Go to step 2. The problem is solved. Make sure that the Page description language (PDL) of the print job is supported. Install the supporting option card if necessary. Does the problem remain? Step 2 Go to step 3.
Page 182 7421 ADF document size mismatch service check Action Step 1 Go to step 2. The problem is solved. Make sure that the scanner paper size setting matches the source tray paper size setting Does the problem remain? Step 2 Go to step 3. The problem is solved.
Page 183: Steps Before Starting The 9Yy Service Checks
7421 Action Step 7 Go to step 8. The problem is solved. Check the paper width and paper length sensors of the source tray for damage, and replace if necessary. Does the problem remain? Step 8 Contact the next level The problem is solved.
Page 184 7421 • Fwedebugs can also be referred to as LBtrace. If FWEdebugs does not appear in the list, then look for LBtrace. Multiple LBtrace logs can appear in the list of links referred to in step 2. From a Web browser, type http://printer_IP_address/se, and then press Enter. Click List Fwedebugs captured during reboots.
Page 185: Errors
183. Determine the operating system used when the error occurred. If possible determine whether a PostScript or PCL file was sent to the printer when the error occurred. Ask the customer which Lexmark Solutions applications are installed on the printer.
Page 186 7421 Action Step 4 Go to step 5. Go to step 6. Properly connect the cables to the controller board. POR the printer into the Diagnostics menu. Does the error remain during startup? Step 5 Go to step 31. The problem is solved. Replace the controller board.
Page 187 Send a print job to the printer. Does the error remain? Step 15 Go to step 31. The problem is solved. Install a Lexmark‑recommended memory option. Send a print job to the printer. Does the error remain? Step 16 Go to step 17.
Page 188 7421 Action Step 18 Go to step 19. The problem is solved. Upgrade the firmware if it was not upgraded in a previous step. Note: Contact your next level of support for the correct firmware level to use. Reset the printer. Send the printer a print job.
Page 189 7421 Action Step 26 Go to step 27. The problem is solved. Are there any more ISP options to install? Step 27 Go to step 29. Go to step 28. Install the next ISP option. Reset the printer. Does the error remain? Step 28 Go to step 29.
Page 190: 911-963 Errors
7421 911–963 errors 911–916 error messages Error code Description Action 911.72 Finisher abnormality was detected when controlling “Option controller board error service check” the exit roller pressure. on page 191. 911.225 Finisher abnormality was detected when driving the motors. 916.165 Destination abnormality was detected.
Page 191 7421 Action Step 3 Go to step 4. The problem is solved. Check the controller board pins for damage, and replace if necessary. See “Controller board removal” on page 356. Does the problem remain? Step 4 Contact the next level The problem is solved.
Page 192: Adf/Scanner Hardware Errors
7421 ADF/scanner hardware errors 800 error messages Error code Description Action 800.04 A timing error occurred during a scan job at the “ADF controller board service check” on front side of the document. page 194. 800.15 The CIS clamp adjustment failed. “ADF CIS service check”...
Page 193: 816-824 Error Messages
7421 816–824 error messages Error code Description Action 816.7 Scanner clamp or gain adjustment failed. “Scanner CCD service check” on page 198. Scanner lamp exposure did not reach the “Scanner lamp service check” on required level. page 199. 820.01 Scanner lamp exposure went over the required level.
Page 194: Adf Controller Board Service Check
7421 ADF controller board service check Actions Step 1 Go to step 2. The problem is solved. Enter the Diagnostics menu, and then navigate to: PRINTER SETUP > Reset Engine Service Error Note: Do this step every time a service error would occur to clear the error and restore the engine settings.
Page 195: Adf/Scanner Image Controller Board Service Check
7421 ADF/scanner image controller board service check Actions Step 1 Go to step 2. The problem is solved. Enter the Diagnostics menu, and then navigate to: PRINTER SETUP > Reset Engine Service Error Note: Do this step every time a service error would occur to clear the error and restore the engine settings.
Page 196: Adf Cis Service Check
7421 ADF CIS service check Actions Step 1 Go to step 2. The problem is solved. Enter the Diagnostics menu, and then navigate to: PRINTER SETUP > Reset Engine Service Error Note: Do this step every time a service error would occur to clear the error and restore the engine settings.
Page 197: Scanner Controller Board Service Check
7421 Actions Step 7 Go to step 8. The problem is solved. Check the ADF/scanner image controller board for damaged pins, and replace if necessary. See “ADF/scanner image controller board removal” on page 354. Does the problem remain? Step 8 Go to step 9.
Page 198: Scanner Ccd Service Check
7421 Actions Step 4 Contact the next level The problem is solved. of support. Check the engine controller board for damaged pins, and replace if necessary. See “Engine controller board removal” on page 353. Does the problem remain? Scanner CCD service check Actions Step 1 Go to step 2.
Page 199: Scanner Lamp Service Check
7421 Scanner lamp service check Actions Step 1 Go to step 2. The problem is solved. Enter the Diagnostics menu, and then navigate to: PRINTER SETUP > Reset Engine Service Error Note: Do this step every time a service error would occur to clear the error and restore the engine settings.
Page 200 7421 Error code Description Action Error occurred when sending image data. • Check line quality. • Adjust ‘Transmit Level’. • Select a lower ‘Max Speed’ value under Fax Receive settings. Received unknown response from remote fax No action needed. Issue is with the other device.
Page 201 7421 Error code Description Action Received too many requests from remote end • Check line quality. to repeat the previous command sent. • Adjust ‘Transmit Level’. • Check if line conditions on remote end will facilitate a good connection. Functional limitation-Remote fax device does No action needed.
Page 202 7421 Error code Description Action Failure to transmit training successfully in V29, • Select a lower “Max Speed” under Fax V27 terminal modulation schemes. Send settings. • Adjust the “Transmit Level”. • Check line quality. Failure to transmit training successfully in V17 •...
Page 203: Escalating A Fax Issue To Second-Level Support
7421 Error code Description Action Phone line was disconnected Restore phone line connection. Received request for unsupported function No action needed. from remote fax device. Received request for unsupported image width No action needed. from remote fax device. Received request for unsupported image No action needed.
Page 204: Symptoms
7421 Fill in the requested information. This is where you will type in the information you retrieved in step 3. Second-level support can assist you if you have questions about the information requested on the page. Note: The fields requesting the code levels, model number, and type of problem are auto‑filled. If the information is not in the fields, it can be retrieved from the SE menu.
Page 205 7421 Action Step 3 Go to step 4. Go to step 5. Make sure that the sensor (3000-sheet tray set) is properly installed. Make sure that the sensor is free of debris or dust. Reseat the cable on the sensor and the cable CN5 on the controller board.
Page 206 7421...
Page 207: Service Menus
7421 Service menus Understanding the printer control panel Using the control panel Use the Display • View the printer status and messages. • Set up and operate the printer. Home button Go to the home screen. Sleep button Enable Sleep mode or Hibernate mode. The following actions wake the printer from Sleep mode: •...
Page 208: Understanding The Home Screen
7421 Indicator light Printer status The printer is off or in Hibernate mode. Blinking green The printer is warming up, processing data, or printing. Solid green The printer is on, but idle. Blinking red The printer requires user intervention. Sleep button light Printer status The printer is off, idle or in Ready state.
Page 209 7421 Touch Forms and Favorites Quickly find and print frequently used online forms. Menu icon Access the printer menus. Note: The menus are available only when the printer is in Ready state. Bookmarks Create, organize, and save a set of bookmarks (URL) into a tree view of folders and file links. Note: The tree view supports only bookmarks created from this function, and not from any other application.
Page 210: Using The Touch-Screen Buttons
7421 Feature Description Status message bar • Show the current printer status such as Ready or Busy. • Show printer conditions such as Toner Low or Cartridge Low. • Show intervention messages so the printer can continue processing. Printer IP address The IP address of your network printer is located at the upper left corner of the home screen and appears as four sets of numbers separated by periods.
Page 211: Menus List
7421 Other touch-screen buttons Touch Accept Save a setting. Cancel • Cancel an action or a selection. • Exit a screen and return to the previous screen without saving changes. Reset Reset values on the screen. Menus list Paper Menu Reports Network/Ports Security...
Page 212: Diagnostics Menu
7421 Paper Menu Reports Network/Ports Security Settings Help Manage Shortcuts Option Card Menu General Settings Print All Guides Fax Shortcuts A list of installed DLEs (Download Emulators) appears. Copy Settings Copy Guide E-mail Shortcuts Fax Settings E-mail Guide FTP Shortcuts E‑mail Settings Fax Guide Copy Shortcuts...
Page 213: Registration
7421 REGISTRATION This menu allows you to perform the following: Adjust the top and left margin values of the installed trays. View how the change in margin values affect the overall registration of the printer. To set the registration: Print a Quick Test page. Enter the Diagnostics menu, and then navigate to: REGISTRATION >...
Page 214: Print Tests
7421 To view the result for a flatbed adjustment, do the following: Remove any paper from the ADF. Compare the results to the original, and adjust if necessary. Place a test page on the flatbed and touch Copy Quick Test. Compare the results to the original, and adjust if necessary.
Page 215: Hardware Tests
7421 HARDWARE TESTS Panel Test This test verifies the function of the control panel display. Enter the Diagnostics menu, and then navigate to: Hardware Tests > Panel Test Exit the test. Button Test This test verifies the function of each button on the control panel. Enter the Diagnostics menu, and then navigate to: HARDWARE TESTS >...
Page 216: Duplex Tests
7421 Serial 1 Wrap This test checks the operation of the serial port hardware using a wrap plug. Each signal is tested. If the test fails, then replace the controller board. Disconnect the serial interface cable, and then install the wrap plug. Enter the Diagnostics menu, and then navigate to: HARDWARE TESTS >...
Page 217: Input Tray Tests
7421 Top Margin This setting controls the offset between the placement of the first scan line on both sides of a duplexed sheet. Note: If adjustment is necessary, adjust first the top margin in the Registration menu. You can adjust next the duplex top margin.
Page 218: Sensor Tests
7421 SENSOR TESTS PRINTER SENSOR TESTS These tests verify that the printer sensors are working properly. Enter the Diagnostics menu, and then navigate to: SENSOR TESTS > PRINTER SENSOR TESTS Select a sensor. Manually toggle the sensor. Note: The sensor status on the screen toggles between Open and Close when the sensor is working properly. 2 x 500‑Sheet Tray Sensor Tests These tests verify that the 2 x 500-sheet tray sensors are working properly.
Page 219: Motor Tests
7421 Staple and Hole Punch Finisher Sensor Tests These tests verify that the staple and hole punch finisher sensors are working properly. Remove the tray inserts from tray 1 and tray 2. Enter the Diagnostics menu, and then navigate to: SENSOR TESTS >...
Page 220 7421 Open the bottom front door and right door. Select Registration. Press X three times. Close the bottom front door and right door. Note: If the engine does not initialize, then the motor test is in safe mode. Select a motor. Check if the motor runs.
Page 221 7421 Navigate to: Motor Tests > 2x500‑Sheet Tray Motor Tests Select a motor. Check if the motor runs. Note: Not all motors run the same way. The following motors run, and then stop after a preset duration: • Tray 3 lift •...
Page 222 7421 The following motors continuously run, unless the test is canceled: • Tray feed • Tray transport 3000‑Sheet Tray Motor Tests These tests verify that the 3000‑sheet tray motors are properly working. Note: If these tests are not performed in safe mode, then the control panel may become unresponsive. Enter the Diagnostics menu, and then close the bottom front door.
Page 223: Device Tests
7421 Check if the motor runs. Booklet Maker Motor Tests These tests verify that the booklet maker motors are working properly. Enter the Diagnostics menu, and then navigate to: Motor Tests > Booklet Maker Motor Tests Select a motor. Check if the motor runs. DEVICE TESTS Quick Disk Test This test performs a non-destructive read/write test on one block per track on the disk.
Page 224: Printer Setup
7421 PRINTER SETUP Defaults Warning—Potential Damage: Modifying printer setting defaults restores the NVRAM space to its factory settings. This setting determines whether the printer uses the U.S. or Non-U.S. factory default value for the following settings: Printer default values U.S. value Non-U.S.
Page 225 7421 PRINTER SETUP > Processor ID Edge to Edge This setting shifts all four margins to the physical edges of the page. This feature does not work in PPDS emulation. Enter the Diagnostics menu, and then navigate to: PRINTER SETUP > Edge to Edge Enable Edge to Edge Copy This setting determines whether the printer accepts the ADF or flatbed edge erase value when performing an ADF or flatbed copy.
Page 226: Reports
7421 Restoring backup data when replacing the engine controller board Before removing the old engine controller board, select Engine card to controller card to move the current engine settings into the controller board. After installing the new engine controller board, select Controller card to engine card to move the engine board settings stored on the controller board to the new engine controller board.
Page 227: Scanner Tests
7421 Clear Log This setting clears current information in the EVENT LOG. Enter the Diagnostics menu, and then navigate to: EVENT LOG > Clear Log Select a setting. Apply the changes. Print Log Summary This prints a summary of the printed event logs. Enter the Diagnostics menu, and then navigate to: EVENT LOG >...
Page 228: Exit Diags
7421 ASIC Test This setting scans the ASIC memory of the scanner. Enter the Diagnostics menu, and then navigate to: SCANNER TESTS > ASIC Test Feed Test This test allows for a continuous feed from the ADF or flatbed. Enter the Diagnostics menu, and then navigate to: SCANNER TESTS >...
Page 229: Configuration Menu
7421 This menu appears as a soft button at the bottom right corner of the display. Configuration Menu Entering the Configuration menu Turn off the printer. Press and hold 2 and 6 while turning on the printer. Release the buttons when the splash screen appears. Hole Punch Configuration The values in this setting determine which values appear in the Hole Punch Mode setting and which value is the default.
Page 230: Reports
7421 Reports Menu Settings Page This report lists the Configuration menu settings and the value of each setting. Enter the Configuration menu, and then navigate to: Reports > Menu Settings Page Return to the Configuration Menu screen. Event Log This setting prints a report of the detailed events in the print log. See “Print Log”...
Page 231: Ppds Emulation
7421 Apply the changes. PPDS Emulation This setting determines if the printer can recognize and use the PPDS data stream. Enter the Configuration menu, and then select PPDS Emulation. Select a setting. Apply the changes. Download Emuls This menu appears only if at least one download emulator (DLE) is installed. The default setting is Disable. All download emulators are automatically re‑enabled after two PORs.
Page 232: Min Copy Memory
7421 Min Copy Memory This setting determines how much DRAM is allowed to be stored in the priority queue for copy jobs. Note: The values appear only if the amount of installed DRAM is at least twice the amount of the value. Enter the Configuration menu, and then select Min Copy Memory.
Page 233: Fb Edge Erase
7421 FB Edge Erase This setting sets the size of the no‑print area around a flatbed scan job. Enter the Configuration menu, and then select FB Edge Erase. Select a setting. Apply the changes. Scanner Manual Registration Use this setting to register the flatbed and ADF on the scanner. Perform a registration adjustment whenever the ADF, flatbed, or controller board is replaced.
Page 234: Action For Prompts
7421 Action for Prompts This gives you the option to allow the printer to resolve change prompt situations without requiring any user assistance. Enter the Configuration menu, and then select Action for Prompts. Select a setting. Apply the changes. Jobs on Disk This setting allows you to delete buffered jobs from the printer hard disk.
Page 235: Ui Automation
Enter the Configuration menu, and then select UI Automation. Select a setting. Apply the changes. LES Applications This setting allows you to enable the Lexmark Embedded Solutions (LES) applications. Enter the Configuration menu, and then select LES Applications. Select a setting. Apply the changes.
Page 236: Usb Speed
7421 USB Speed This setting determines the throughput of the USB port on the printer. Enter the Configuration menu, and then select USB Speed. Select a setting. Apply the changes. Automatically Display Error Screens This setting allows the automatic display of existing printer-related messages on the home screen after the printer remains inactive.
Page 237: Exit Config
7421 Enter the Configuration menu, and then navigate to: Restore Factory Defaults > Erase Hard Disk Select any of the following: • Single Pass Erase overwrites all data and the file system. This wipe is faster but less secure since it is possible to retrieve the deleted data with forensic data‑retrieval techniques.
Page 238: Entering Safe Mode (Everready Mode)
7421 Entering Safe Mode (EverReady Mode) This mode enables the printer to temporarily offer minimal print capabilities. Turn off the printer. Press and hold 7 and 6 while turning on the printer. Release the buttons after 10 seconds. Accessing the Network SE Menu This menu contains settings for fine tuning the communication settings for the network interfaces and protocols.
Page 239: Fax Service Engineer (Se) Menu
7421 Top level menu Intermediate menu TCP/IP • netstat‑r • arp‑a • Allow SNMP Set • • Meditech Mode • RAW LPR Mode • Gather Debug • Enable Debug Fax Service Engineer (SE) Menu Use this menu for the fax transmission and fax reception service checks. Use this menu as directed by the next level of support.
Page 240 7421...
Page 241: Repair Information
7421 Repair information Removal precautions CAUTION—SHOCK HAZARD: For personal safety and to prevent damage to the printer, remove the power cord from the electrical outlet before you connect or disconnect any cable, electronic board, or assembly. Disconnect any connections between the printer and the computer or peripherals. Data security notice The printer contains various types of memory that store printer and network settings, information from embedded solutions, and user data.
Page 242: Restoring The Printer Configuration After Replacing The Controller Board
Note: The software bundle contains the latest version of the firmware, applications, and software licenses from the Lexmark Virtual Solutions Center (VSC). The printer firmware may be at a different level from what was used before replacing the controller board.
Page 243 7421 Save the zip file. Note: Make sure that the serial number in the zip file matches the serial number of the printer being restored. Extract the contents of the zip file, open the Readme file, and then follow the instructions in the file. Notes: •...
Page 244 7421 After performing the installation instructions in the Readme file, confirm from the customer if all the eSF apps have been installed. Notes: • If you are unable to access the administrative menus to verify that the printer is restored, then ask the customer for access rights.
Page 245: Restoring Solutions, Licenses, And Configuration Settings
7421 Restoring solutions, licenses, and configuration settings To load the zip files that are extracted from the Service Restore Tool, do the following: Open a Web browser, and then type the printer IP address. Navigate to Settings > Configuration Files. From the Configuration File History tab, navigate to Import >...
Page 246: Updating The Printer Firmware
7421 Click Import. Repeat steps 3 to 5 for the other zip files that are included in the expanded zip file. Updating the printer firmware Warning—Potential Damage: Before updating the printer firmware, ask the next level of support for the correct code.
Page 247: Backing Up Esf Solutions And Settings
7421 Using a network computer Using the File Transfer Protocol (FTP) Make sure that the printer is in ready state before flashing the printer. Turn on the printer. Obtain the IP address: • From the home screen • From the TCP/IP section of the Network/Ports menu From the command prompt of a network computer, open an FTP session to the printer IP address.
Page 248: Understanding The Marked Or Colored Screws
7421 Importing eSF solutions and settings file After replacing the controller board, import back to the printer the eSF solutions and settings that were exported. POR the printer into Invalid engine mode. See “Entering Invalid engine mode” on page 237. Open a Web browser, and then type the printer IP address.
Page 249: Horizontal Top Contact Connector
7421 Horizontal top contact connector This connector uses a back flip locking actuator to lock the ribbon cable into the ZIF connector. Warning—Potential Damage: When opening or closing this type of actuator, lift or close the two tabs located on each end of the actuator.
Page 250 7421 Rotate the locking actuator to the locked position. Notes: • Do not move the cable while locking the actuator. • If the cable moves, open the actuator, reposition the cable, and then close the actuator. Repair information...
Page 251: Horizontal Bottom Contact Connector
7421 Horizontal bottom contact connector This connector uses a flip locking actuator to lock the ribbon cable into the ZIF connector. Warning—Potential Damage: When opening or closing this type of actuator, gently lift the center of the actuator using your finger. Do not use a fingernail or screwdriver to open the actuator to avoid damaging the ribbon cable. Do not close the actuator from its ends.
Page 252 7421 Inserting the cable Make sure that the actuator is in the open position. Insert the cable below the actuator with the contacts facing downward and away from the locking actuator. Note: Make sure that the cable is installed squarely into the connector to avoid intermittent failures. Repair information...
Page 253: Vertical Mount Contact Connector
7421 Rotate the locking actuator to the locked position. Vertical mount contact connector This connector uses a back flip locking actuator to lock the ribbon cable into the ZIF connector. Warning—Potential Damage: When opening or closing this type of actuator, gently lift the center of the actuator using your finger.
Page 254 7421 Inserting the cable Make sure that the locking actuator is in the open position. Insert the cable on top of the actuator with the contacts facing away from the locking actuator. Note: Make sure that the cable is installed squarely into the connector to avoid intermittent failures. Rotate the locking actuator to the locked position.
Page 255: Horizontal Sliding Contact Connector
7421 Horizontal sliding contact connector This connector uses a slide locking actuator to lock the ribbon cable into the ZIF connector. Warning—Potential Damage: When opening or closing this type of actuator, gently push or pull the two tabs located on each end of the actuator. Do not close the actuator from the center of the actuator. Do not use a screwdriver to open or close the actuator to avoid damage to the cable or connector.
Page 256 7421 Inserting the cable Make sure that the locking actuator is in the open position. If you are opening the connector, then pull back the end tabs using equal force to avoid breaking the connector. Insert the cable on top of the actuator with the contacts facing away from the locking actuator. Slide the locking actuator toward the connector to lock the cable.
Page 257: Low Insertion Force (Lif) Connector
7421 Low Insertion Force (LIF) connector Warning—Potential Damage: When installing a cable into an LIF connector, avoid bending the edges of the cables and damaging the contacts on the cables. Inserting the cable Make sure that the contacts of the controller board and connectors are on the same side. Insert the cable.
Page 258: Adjustments
7421 Adjustments ADF height adjustment Jams may occur when clearance between the ADF and flatbed scanner is too low. Image quality issues may also occur when the clearance is too high. Perform this step to correct the clearance between the ADF and flatbed scanner or when replacing the ADF assembly.
Page 259: Adf Registration Adjustment
7421 If there is any clearance, turn the two adjustment screws (B) clockwise or counterclockwise to lift or lower the rear side. ADF registration adjustment Enter the Configuration Menu, and then navigate to: Scanner Manual Registration > Print Quick Test Place the Quick Tests page on the ADF and then select Copy Quick Test.
Page 260: Adf Separator Roller Pressure Adjustment
7421 ADF separator roller pressure adjustment Jams may occur if the improper level of pressure is applied in feeding thin paper. Perform this step to increase or decrease the ADF separator roller pressure. Open the ADF top cover. Grip both sides of the ADF separator pad (A), and then remove the cover (B). Remove the spacer (C).
Page 261: Flatbed Registration Adjustment
7421 Set the spacer on the lower part of the spring with its deeper groove facing up. If the spring force is not enough, set the spacer on the lower part of the spring with its shallow groove facing up. Flatbed registration adjustment Enter the Configuration Menu, and then navigate to: Scanner Manual Registration >...
Page 262: Fuser Alignment Adjustment
7421 Select Flatbed. The current values of the left margin and right margin registration settings appear. Adjust the left and right margins. Apply the changes. Repeat step 2 to view the updated values. Repeat steps 3 through 5 to make further adjustments. Fuser alignment adjustment Fuser misalignment may cause wrinkles on the paper.
Page 263: Mpf Separator Roller Pressure Adjustment
7421 Perform a print job to verify the adjustment. MPF separator roller pressure adjustment Jams may occur if the improper level of pressure is applied in picking thick paper from the MPF tray. Perform this procedure to adjust the separator roller pressure. Open the right door, remove the screw (A), and then remove the cover.
Page 264 7421 Release the hook (B). Attach the hook to the hole (C). Note: The correct position is shown in the following illustration. Repair information...
Page 265: Pick Roller Pressure Adjustment
7421 Perform a print job to verify the adjustment. Pick roller pressure adjustment Jams may occur if the improper level of pressure is applied in picking thin paper. Perform this step to increase or decrease the pick roller pressure. Remove the tray 1 and 2 paper feed unit. Remove the replacement spring (A).
Page 266 7421 Release the clips (B), and then remove the pick tire, bushing, and shaft. Press the lever, remove the spring (C), and then install the replacement spring from step 2. Perform a print job to verify the adjustment. Repair information...
Page 267: Scanner Carriage Belt Adjustment
7421 Scanner carriage belt adjustment Loose scanner carriage belt may affect the scan speed of the scanner lamp and cause scan quality issues. Perform this step to correct the scanner drive belt tension or after replacing the motor (scanner drive). Attach the spring to the motor (scanner drive) (A), and then temporarily secure the motor with three screws (B).
Page 268: 3000-Sheet Tray Pick Roller Pressure Adjustment
7421 Notes: • Make sure that the belt tension is not too loose or too tight. • Make sure that the drive belt is kept tight by the spring. Turn the drive gear. Tighten the three screws (D). Note: Make sure that the belt tension is not too loose or too tight. 3000‑sheet tray pick roller pressure adjustment Jams may occur if the improper level of pressure is applied when picking thin paper.
Page 269 7421 Remove the screw (B), and then remove the handle. Add one or more plates. Note: A total of four plates can be installed. Repair information...
Page 270: 2500-Sheet Tray Transfer Guide Belt Adjustment
7421 Perform a print job to verify the adjustment. 2500‑sheet tray transfer guide belt adjustment Loose transfer guide belt may cause paper stack transfer failure. Perform this step to correct the transfer guide belt tension. Remove the tray insert. Raise the main tray. Remove the two screws (A), and then remove the belt cover (B).
Page 271: Removal Procedures
7421 Move the paper stack transfer guide. Loosen the tension screw (C) and then move the belt (D) to adjust. Retighten the tension screw. Removal procedures When replacing printer parts, consider the following: • Some removal procedures require removing cable ties. Replace cable ties during reassembly to avoid pinching wires, obstructing the paper path, or restricting mechanical movement.
Page 272: Left Side Removals
7421 Left side removals Left cover removal Remove the three screws (A). Remove the cover. Repair information...
Page 273: Rear Left Cover Removal
7421 Rear left cover removal Remove the left cover. See “Left cover removal” on page 272. Remove the three screws (A), and then remove the cover. Main power supply shield removal Note: This part is not a FRU. Remove the left cover. See “Left cover removal”...
Page 274: Main Power Supply Fan Removal
7421 Remove the six screws (A), and then remove the shield. Main power supply fan removal Remove the left cover. See “Left cover removal” on page 272. Remove the rear left cover. See “Rear left cover removal” on page 273. Remove the main power supply shield.
Page 275: Main Power Supply Removal
7421 Main power supply removal CAUTION—SHOCK HAZARD: The main power supply capacitors may have residual voltage. Do not touch the parts under the insulated area. The printer must be turned off for four hours to dissipate the charge. CAUTION—FIRE HAZARD: To prevent fire, do not replace fuse with the incorrect type and rating. Remove the left cover.
Page 276: Printhead Relay Board Removal
7421 Disconnect the two cables (A), and then remove the eight screws (B) from the cover. From the front, disconnect the two cables (C), and then remove the two screws (D). Remove the cover and printhead. Printhead relay board removal Remove the top front door.
Page 277 7421 Remove the front inner cover. See “Front inner cover removal” on page 328. Remove the waste toner door mount. See “Waste toner door mount removal” on page 328. Remove the left cover. See “Left cover removal” on page 272. Remove the rear left cover.
Page 278: Right Side Removals
7421 Right side removals Port access door removal Open the door, and then remove the four screws (A). Remove the door. Repair information...
Page 279: Fuser Removal
7421 Fuser removal Open the right door. Remove the three screws (A). Remove the fuser connector cover, and then disconnect the three fuser cables (B). Remove the fuser. Note: If the fuser rollers are not retracted, the fuser may be hard to remove. To retract the fuser roller, turn on the printer to initiate warm‑up, and then turn off the printer.
Page 280 7421 From the rear side, disconnect the four cables (A), and then remove the two screws (B). Remove the two screws (B). Repair information...
Page 281 7421 Behind the heater, release the cables from the guide (D). Remove the heater. Installation note: Make sure that the cables are properly routed. Repair information...
Page 282: Registration Transport Assembly
7421 Registration transport assembly Remove the fuser. See “Fuser removal” on page 279. Remove the clip (A), and then remove the gear. Remove the four screws (B). Disconnect the cables from the image controller board, and then remove the assembly. Repair information...
Page 283: Upper Right Cover Removal
7421 Upper right cover removal Note: This part is not a FRU. Remove the scanner right cover. See “Scanner right cover removal” on page 430. Remove the two screws (A), and then remove the cover. Redrive belt cover removal Note: This part is not a FRU. Open the right door.
Page 284: Redrive Belt Removal
7421 Redrive belt removal Remove the motor (redrive). See “Motor (redrive) removal” on page 364. Remove the redrive belt cover. See “Redrive belt cover removal” on page 283. Remove the redrive belt. Transfer roller removal Open the right door. Release the latches (A). Remove the transfer roller.
Page 285: Duplex Transport Assembly Removal
7421 Duplex transport assembly removal Open the right door. Remove the two screws (A), and then remove the cover. Disconnect the cable (B), and then remove the three screws (C). Repair information...
Page 286: Duplex Transport Jam Removal Knob Removal
7421 Remove the five screws (D), and then remove the assembly. Duplex transport jam removal knob removal Open the right door. Remove the screw (A), and then remove the knob. Repair information...
Page 287: Duplex Transport Diverter Assembly Removal
7421 Duplex transport diverter assembly removal Note: This part is not a FRU. Remove the duplex transport assembly. See “Duplex transport assembly removal” on page 285. Remove the two screws (A), and then remove the bracket. Remove the three screws (B), and then lift the diverter assembly. Repair information...
Page 288: Sensor (Fuser Exit) Removal
7421 Disconnect the cable (C), and then remove the assembly. Sensor (fuser exit) removal Remove the duplex transport assembly. See “Duplex transport assembly removal” on page 285. Remove the duplex transport diverter assembly. See “Duplex transport diverter assembly removal” on page 287.
Page 289: Sensor (Duplex Pass Through 1) Removal
7421 Remove the six screws (A), remove the diverter bracket, and then remove the sensor actuator (B). Installation note: Make sure that the ground retainers (A) are correctly installed. Sensor (duplex pass through 1) removal Remove the duplex transport assembly. See “Duplex transport assembly removal”...
Page 290: Duplex Pass Through 1 Actuator Removal
7421 Disconnect the cable (A), and then remove the sensor. Duplex pass through 1 actuator removal Remove the duplex transport assembly. See “Duplex transport assembly removal” on page 285. Remove the duplex transport diverter assembly. See “Duplex transport diverter assembly removal” on page 287.
Page 291 7421 Release the retainers (B), and then remove the bracket. Remove the actuator (C). Repair information...
Page 292: Duplex Transport Belt Removal
7421 Duplex transport belt removal Remove the duplex transport assembly. See “Duplex transport assembly removal” on page 285. Release the clip (A), and then remove the gear. Remove the belt. Duplex transport gears removal Remove the duplex transport assembly. See “Duplex transport assembly removal”...
Page 293: Motor (Duplex Transport) Removal
7421 Motor (duplex transport) removal Remove the duplex transport assembly. See “Duplex transport assembly removal” on page 285. Remove the five screws (A). Note: Take note of the original position of the retainer (B). Repair information...
Page 294 7421 Disconnect the cable (C). Move away the bracket, and then remove the two screws (D). Remove the motor. Repair information...
Page 295: Right Door Lock Removal
7421 Right door lock removal Open the right door. Remove the six screws (A). Release the spring (B), and then remove the lock. Installation note: Make sure that the bottom spring (B) is correctly installed. Repair information...
Page 296: Tray 2 Transport Guide
7421 Tray 2 transport guide Open the right door. Remove the 11 screws (A), and then remove the guide. Repair information...
Page 297: Mpf Removal
7421 MPF removal Remove the tray 2 transport guide. See “Tray 2 transport guide” on page 296. Remove the screw (A), and then remove the cover. Disconnect the three cables (B), and then remove the ground screw (C). Repair information...
Page 298: Mpf Tray Removal
7421 Remove the 10 screws (D), and then remove the assembly. Installation note: Secure the cables to their clips. MPF tray removal Note: This part is not a FRU. Remove the tray 2 transport guide. See “Tray 2 transport guide” on page 296.
Page 299: Sensor (Mpf Paper Length) Removal
7421 Sensor (MPF paper length) removal Remove the tray 2 transport guide. See “Tray 2 transport guide” on page 296. Remove the MPF. See “MPF removal” on page 297. Remove the MPF tray. See “MPF tray removal” on page 298. Remove the five screws (A), and then lift the cover.
Page 300: Mpf Feed Clutch Removal
7421 MPF feed clutch removal Remove the tray 2 transport guide. See “Tray 2 transport guide” on page 296. Remove the MPF. See “MPF removal” on page 297. Remove the screw (A), and then remove the cover. Disconnect the cable (B), and then release the clip (C). Remove the clutch.
Page 301: Mpf Lift Plate Solenoid Removal
7421 MPF lift plate solenoid removal Remove the tray 2 transport guide. See “Tray 2 transport guide” on page 296. Remove the MPF. See “MPF removal” on page 297. Remove the MPF feed clutch. See “MPF feed clutch removal” on page 300.
Page 302: Mpf Gears Removal
7421 Disconnect the cable (E), and then remove the solenoid. MPF gears removal Remove the tray 2 transport guide. See “Tray 2 transport guide” on page 296. Remove the MPF. See “MPF removal” on page 297. Remove the MPF feed clutch. See “MPF feed clutch removal”...
Page 303: Sensor (Mpf Lift Plate) Removal
7421 Release the clip (B), and then remove the bushing. Remove the screw (C), remove the bracket, and then remove the gear (D). Note: The MPF gears include the gears, bushing, clips, cam, and actuator. Sensor (MPF lift plate) removal Remove the tray 2 transport guide.
Page 304 7421 Remove the screw (A), and then remove the cover. Disconnect the cable (B), and then remove the screw (C). Repair information...
Page 305: Sensor (Mpf Empty) Removal
7421 Lift the bracket, and then disconnect the cable (D). Remove the sensor. Sensor (MPF empty) removal Remove the tray 2 transport guide. See “Tray 2 transport guide” on page 296. Remove the MPF. See “MPF removal” on page 297. Remove the screw (A), and then disconnect the cable (B).
Page 306: Mpf Feed/Separator Assembly
7421 MPF feed/separator assembly Remove the tray 2 transport guide. See “Tray 2 transport guide” on page 296. Remove the MPF. See “MPF removal” on page 297. Remove the screw (A), remove the bracket, and then remove the separator spring. Remove the two screws (B), and then remove the cover and bracket.
Page 307 7421 Installation notes: • Make sure that the separator roller slot (A) aligns with the pin (B) on the shaft. Repair information...
Page 308: Mpf Lift Plate Assembly Removal
7421 • Make sure that the bushing (C) is correctly positioned onto the shaft. MPF lift plate assembly removal Note: This part is not a FRU. Remove the tray 2 transport guide. See “Tray 2 transport guide” on page 296. Remove the MPF.
Page 309: Mpf Empty Actuator Removal
7421 Disconnect the cable (B), and then release it from the cable clips. Remove the assembly. MPF empty actuator removal Note: This part is not a FRU. Remove the tray 2 transport guide. See “Tray 2 transport guide” on page 296.
Page 310: Duplex Transport Guide Removal
7421 Duplex transport guide removal Note: This part is not a FRU. Remove the tray 2 transport guide. See “Tray 2 transport guide” on page 296. Remove the MPF. See “MPF removal” on page 297. Remove the seven screws (A), and then remove the guide. Registration unit latch assembly removal Note: This part is not a FRU.
Page 311 7421 Remove the screw (A), and then remove the latch and spring. On the rear side of the printer, remove the two screws (B), and then remove the latch. Repair information...
Page 312: Right Door Switch Actuator Removal
7421 Right door switch actuator removal Open the right door. Remove the four screws (A), and then remove the actuator. Right door removal Note: This part is not a FRU. Open the right door. Installation note: Before removing the door, take note of the alignment of the door hinge. Repair information...
Page 313 7421 Remove the two screws (A), and then remove the upper hinge. Remove the door. Repair information...
Page 314: Registration Unit Assembly Removal
7421 Registration unit assembly removal Remove the right door. See “Right door removal” on page 312. Disconnect the cable (A), and then remove the two screws (B). Lift the registration unit to release, and then remove. Repair information...
Page 315: Registration Unit Sub-Assembly Removal
7421 Registration unit sub-assembly removal Note: This part is not a FRU. Remove the registration unit assembly. See “Registration unit assembly removal” on page 314. Remove the screw (A) from the right bracket. Remove the screw (B) from the left bracket. Repair information...
Page 316 7421 Disconnect the cable (C), and then remove the sub-assembly. CAUTION—POTENTIAL INJURY: This part has sharp points. Installation note: Align the two springs while pushing down the assembly, and then move the assembly to the left to lock. Repair information...
Page 317: Sensor (Fusing Speed) Removal
7421 Sensor (fusing speed) removal Remove the registration unit assembly. See “Registration unit assembly removal” on page 314. Remove the registration unit sub-assembly. See “Registration unit sub-assembly removal” on page 315. Disconnect the cable (A), and then remove the sensor. Fusing speed actuator removal Note: This part is not a FRU.
Page 318: Sensor (Duplex Pass Through 2) Removal
7421 Installation note: Make sure that the spring (A) is correctly positioned on the actuator base. Sensor (duplex pass through 2) removal Remove the registration unit assembly. See “Registration unit assembly removal” on page 314. Remove the registration unit sub-assembly. See “Registration unit sub-assembly removal”...
Page 319: Registration Unit Belt Removal
7421 Registration unit belt removal Remove the registration unit assembly. See “Registration unit assembly removal” on page 314. Remove the registration unit sub-assembly. See “Registration unit sub-assembly removal” on page 315. Remove the 11 screws (A), and then remove the plate. Release the clip (B), and then remove the gear.
Page 320: Registration Unit Gears Removal
7421 Registration unit gears removal Remove the registration unit assembly. See “Registration unit assembly removal” on page 314. Remove the registration unit sub-assembly. See “Registration unit sub-assembly removal” on page 315. Remove the 11 screws (A), and then remove the plate. Remove the screw (B), remove the bracket, and then remove the gear.
Page 321: Registration Unit Lock Removal
7421 Release the two clips (C), and then remove the gears. Note: The registration gear pack includes the gears, bushings, and clips. Registration unit lock removal Remove the registration unit assembly. See “Registration unit assembly removal” on page 314. Remove the registration unit sub-assembly. See “Registration unit sub-assembly removal”...
Page 322 7421 Remove the 11 screws (A), and then remove the plate. Remove the two screws (A), and then remove the lock. Repair information...
Page 323: Front Side Removals
7421 Front side removals Control panel frame removal Note: This part is not a FRU. Remove the speaker cover. See “Speaker cover removal” on page 338. Remove the three screws (A), and then disconnect the control panel board cable (B). Repair information...
Page 324 7421 Remove the 14 screws (C) behind the control panel. Remove the two screws (D), and then remove the cover. Repair information...
Page 325: Control Panel Board Removal
7421 Remove the 12 screws (E), and then remove the frame. Control panel board removal Remove the speaker cover. See “Speaker cover removal” on page 338. Remove the control panel frame. See “Control panel frame removal” on page 323. Disconnect the two cables (D), and then remove the five screws (E). Remove the board.
Page 326: Touch Screen Removal
7421 Touch screen removal Remove the speaker cover. See “Speaker cover removal” on page 338. Remove the control panel frame. See “Control panel frame removal” on page 323. Disconnect the two cables (A), remove the four screws (B), and then remove the shield. Remove the two screws (C), and then remove the two screws from the opposite side.
Page 327: Top Front Door Removal
7421 Top front door removal Open the door, and then remove the two clips (A). Slightly move the door to the right to release, and then remove. Bottom front door removal Open the door, and then remove the clip (A). Slightly move the door to the right to release, and then remove.
Page 328: Front Inner Cover Removal
7421 Front inner cover removal Remove the top front door. See “Top front door removal” on page 327. Remove the bottom front door. See “Bottom front door removal” on page 327. Remove the three screws (A), and then remove the cover. Waste toner door mount removal Remove the top front door.
Page 329: Image Controller Board Removal
7421 Image controller board removal Remove the top front door. See “Top front door removal” on page 327. Remove the bottom front door. See “Bottom front door removal” on page 327. Remove the waste toner door mount. See “Waste toner door mount removal” on page 328.
Page 330: Main Power Switch Removal
7421 Remove the screw (A), and then move away the bracket. Disconnect the two cables (B), and then remove the screw (C). Release the retainer, and then remove the switch. Main power switch removal Remove the top front door. See “Top front door removal”...
Page 331: Sensor (Top Front Door) Removal
7421 Remove the screw (A), and then move away the switch. Disconnect the four cables and remove the switch. Installation note: Red connectors are on top, while white connectors are at the bottom. Black cables are on the right, while white cables are on the left. Sensor (top front door) removal Remove the top front door.
Page 332: Motor (Toner Supply) Removal
7421 Remove the screw (A), and then move away the bracket. Disconnect the cable, and then remove the sensor (B). Motor (toner supply) removal Remove the top front door. See “Top front door removal” on page 327. Remove the bottom front door. See “Bottom front door removal”...
Page 333: Waste Toner Drive Removal
7421 Remove the screw (A), and then disconnect the cable. Remove the motor. Waste toner drive removal Remove the top front door. See “Top front door removal” on page 327. Remove the bottom front door. See “Bottom front door removal” on page 327.
Page 334: Sensor (Toner Cartridge Present) Removal
7421 From the right, remove the screw (B). Remove the waste toner drive. Sensor (toner cartridge present) removal Remove the top front door. See “Top front door removal” on page 327. Remove the bottom front door. See “Bottom front door removal” on page 327.
Page 335: Toner Agitator Removal
7421 Disconnect the cable, and then remove the sensor (B). Toner agitator removal Remove the standard bin base. See “Standard bin base removal” on page 389. Remove the top front door. See “Top front door removal” on page 327. Remove the bottom front door. See “Bottom front door removal”...
Page 336: Developer Unit Removal
7421 Remove the four screws (B). Disconnect the cables, and then remove the assembly. Developer unit removal Remove the standard bin base. See “Standard bin base removal” on page 389. Remove the top front door. See “Top front door removal” on page 327.
Page 337 7421 Disconnect the cable (A), remove the two screws (B) and then remove the unit. Installation warning: If the following notes are not implemented, then the toner may leak or get stuck. Toner supply failure will cause a blank print or low toner error. Installation notes: •...
Page 338: Right Door Switch Removal
7421 Right door switch removal Remove the speaker cover. Disconnect the two cables (A), and then remove the screw (B). Remove the switch. Speaker cover removal Remove the four screws (A) securing the cover. Repair information...
Page 339 7421 Remove the two screws (B) securing the metal frame, and then remove the metal frame. Remove the two screws (C) to disengage the USB cover. Note: Do not remove the USB cable from the cover. Open the cartridge door. Repair information...
Page 340: Speaker Removal
7421 Remove the speaker cover. Speaker removal Remove the speaker cover. See “Speaker cover removal” on page 338. Remove the screws (A), and then remove the speaker frame. Disconnect the speaker cable, and then remove the speaker. Repair information...
Page 341: Control Panel Removal
7421 Control panel removal Remove the speaker cover. See “Speaker cover removal” on page 338. Remove the screws (A), and then remove the speaker frame. Repair information...
Page 342 7421 Remove the three screws (B), and then disconnect the control panel board cable (C). Repair information...
Page 343 7421 Turn over the control panel, and then remove the 14 screws (D) to remove the bottom cover of the control panel. Disconnect the control panel ZIF cable (E), and then remove the pieces of tape (F). Remove the control panel. Repair information...
Page 344: Rear Side Removals
7421 Rear side removals Scanner interface cable cover removal Remove the screw (A). Remove the cover. Repair information...
Page 345: Controller Board Access Cover Removal
7421 Controller board access cover removal Remove the seven screws (A). Remove the input options interface cover, and then remove the controller board cover. Repair information...
Page 346: Engine Board Cover Removal
7421 Engine board cover removal Remove the controller board access cover. See “Controller board access cover removal” on page 345. Remove the two filters (A), and then remove the six screws (B). Remove the cover. Upper rear cover removal Remove the scanner rear cover. See “Scanner rear cover removal”...
Page 347: Ihps Shield Removal
7421 Disconnect the four cables (A), and then remove the two screws (B). Remove the cover. IHPS shield removal Note: This part is not a FRU. Remove the scanner interface cable cover. See “Scanner interface cable cover removal” on page 344.
Page 348: Induction Heater Magnetic Erase Board (Ihmeb) Removal
7421 Remove the seven screws (A), and then remove the shield. Induction heater magnetic erase board (IHMEB) removal Remove the scanner interface cable cover. See “Scanner interface cable cover removal” on page 344. Remove the controller board access cover. See “Controller board access cover removal”...
Page 349 7421 Installation note: Follow the arrangement of the colored symbols to install the cables to their correct positions. Release the four latches (B), and then remove the board. Release the four latches that are still attached on the board. Repair information...
Page 350: Induction Heater Power Supply (Ihps) Removal
7421 Induction heater power supply (IHPS) removal Remove the scanner interface cable cover. See “Scanner interface cable cover removal” on page 344. Remove the controller board access cover. See “Controller board access cover removal” on page 345. Remove the engine board cover. See “Engine board cover removal”...
Page 351: Expansion Controller Board Removal
7421 Disconnect the cables, and then remove the four screws (A). Remove the board. Expansion controller board removal Remove the scanner interface cable cover. See “Scanner interface cable cover removal” on page 344. Remove the controller board access cover. See “Controller board access cover removal”...
Page 352: Power-Saving Board Removal
7421 Disconnect the cables, and then remove the four screws (A). Remove the board. Power‑saving board removal Remove the scanner interface cable cover. See “Scanner interface cable cover removal” on page 344. Remove the controller board access cover. See “Controller board access cover removal” on page 345.
Page 353: Engine Controller Board Removal
7421 Disconnect the cables, and then remove the two screws (A). Remove the board. Engine controller board removal Warning—Potential Damage: Do not replace the engine controller board and controller board at the same time. Before removing the engine controller board, copy its settings to the controller board to avoid losing its original settings.
Page 354: Adf/Scanner Image Controller Board Removal
7421 Disconnect the cables, and then remove the eight screws (A). Remove the board. ADF/scanner image controller board removal Remove the controller board access cover. See “Controller board access cover removal” on page 345. Remove the upper rear cover. See “Upper rear cover removal”...
Page 355 7421 Disconnect the cable (B), and then remove the two screws (C). Remove the board. Installation note: Connect the scanner CCD cable (A) and ADF CIS data cable (B) as shown in the illustration. If the cables are connected to the wrong socket, then an Invalid Scanner Code error will occur. Repair information...
Page 356: Hard Drive Removal
7421 Hard drive removal Note: This part is not a FRU. Remove the controller board cover. See “Controller board access cover removal” on page 345. Disconnect the cable (A), and then remove the two screws (B). Remove the hard drive. Controller board removal Warning—Potential Damage: Do not replace the engine controller board and controller board at the same time.
Page 357: Fax Card Removal
7421 Disconnect the cables, and then remove the 12 screws (A). Remove the board. Installation notes: After installing the new controller board, restore the printer configuration. See “Restoring the printer configuration after replacing the controller board” on page 242. Restore the eSF solutions and settings. See Importing eSF solutions and settings file under “Backing up eSF solutions and settings”...
Page 358: Motor (Fuser Pressure) Removal
7421 Open the port access door, and then remove the two screws (A). Disconnect the cable (B), and then remove the card. Motor (fuser pressure) removal Remove the scanner interface cable cover. See “Scanner interface cable cover removal” on page 344.
Page 359: Paper Exit Fan Duct Removal
7421 Disconnect the cable (A), and then remove the two screws (B). Remove the motor. Paper exit fan duct removal Remove the scanner interface cable cover. See “Scanner interface cable cover removal” on page 344. Remove the controller board access cover. See “Controller board access cover removal”...
Page 360: Paper Exit Fan Removal
7421 Paper exit fan removal Remove the scanner interface cable cover. See “Scanner interface cable cover removal” on page 344. Remove the controller board access cover. See “Controller board access cover removal” on page 345. Remove the engine board cover. See “Engine board cover removal”...
Page 361: Fuser Power Supply Fan Removal
7421 Remove the seven screws (A). Disconnect the cables within the frame, and then release them from the guides. Remove the frame. Fuser power supply fan removal Remove the scanner interface cable cover. See “Scanner interface cable cover removal” on page 344.
Page 362: Motor (Toner Cartridge) Removal
7421 Disconnect the cable (A). Remove the IHPS frame. See “IHPS frame removal” on page 360. Remove the two screws (B), and then remove the fan. Motor (toner cartridge) removal Remove the scanner interface cable cover. See “Scanner interface cable cover removal” on page 344.
Page 363 7421 Remove the IHPS shield. See “IHPS shield removal” on page 347. Disconnect the cable (A) and then remove the motor screw (B). Release the cable from the guides, and then remove the motor. Repair information...
Page 364: Motor (Redrive) Removal
7421 Motor (redrive) removal Remove the port access door. See “Port access door removal” on page 278. Remove the three screws (A), and then remove the bracket. From the rear, disconnect the cable (B), and then remove the two screws (C). Remove the motor.
Page 365: Controller Board Frame Removal
7421 Controller board frame removal Note: This part is not a FRU. Remove the port access door. See “Port access door removal” on page 278. Remove the controller board access cover. See “Controller board access cover removal” on page 345. Remove the engine board cover.
Page 366: Controller Board Fan Removal
7421 From the rear, remove the two screws (B). Disconnect the four cables (C), and then open the frame. Controller board fan removal Remove the port access door. See “Port access door removal” on page 278. Remove the controller board access cover. See “Controller board access cover removal”...
Page 367: Motor (Transport) Removal
7421 Open the controller board frame. See “Controller board frame removal” on page 365. Disconnect the cable (A), and then remove the two screws (B). Remove the fan. Motor (transport) removal Remove the port access door. See “Port access door removal” on page 278.
Page 368: Motor (Developer) Removal
7421 Disconnect the cable (A), and then remove the four screws (B). Motor (developer) removal Remove the port access door. See “Port access door removal” on page 278. Remove the controller board access cover. See “Controller board access cover removal” on page 345.
Page 369: High Voltage Board Removal
7421 Disconnect the cable (A), and then remove the four screws (B). High voltage board removal Remove the port access door. See “Port access door removal” on page 278. Remove the controller board access cover. See “Controller board access cover removal” on page 345.
Page 370: Motor (Registration) Removal
7421 Disconnect the cables, remove the four screws (A), and then release the latch (B). Remove the board. Motor (registration) removal Remove the port access door. See “Port access door removal” on page 278. Remove the controller board access cover. See “Controller board access cover removal”...
Page 371 7421 Disconnect the cable (A), and then remove the two screws (B). Remove the bracket, remove the two screws (C), and then remove the motor. Repair information...
Page 372: Motor (Feed) Removal
7421 Motor (feed) removal Remove the port access door. See “Port access door removal” on page 278. Remove the controller board access cover. See “Controller board access cover removal” on page 345. Remove the engine board cover. See “Engine board cover removal” on page 346.
Page 373: Tray 2 Transport Drive Removal
7421 Remove the two screws (C), and then remove the motor. Tray 2 transport drive removal Remove the port access door. See “Port access door removal” on page 278. Remove the controller board access cover. See “Controller board access cover removal” on page 345.
Page 374: Motor (Tray 2 Transport) Removal
7421 From the right, remove the three screws (A), and then remove the bracket. From the rear, disconnect the cable (B), and then remove the three screws (C). Remove the assembly. Motor (tray 2 transport) removal Remove the port access door. See “Port access door removal”...
Page 375: Feed Drive Assembly Removal
7421 Remove the scanner interface cable cover. See “Scanner interface cable cover removal” on page 344. Remove the upper rear cover. See “Upper rear cover removal” on page 346. Open the controller board frame. See “Controller board frame removal” on page 365.
Page 376: Sensor (Tray 1 And 2 Paper Temperature) Removal
7421 Sensor (tray 1 and 2 paper temperature) removal Remove the port access door. See “Port access door removal” on page 278. Remove the controller board access cover. See “Controller board access cover removal” on page 345. Remove the engine board cover. See “Engine board cover removal”...
Page 377 7421 Repair information...
Page 378: Ozone Fan Duct Removal
7421 Disconnect the cable (D), and then remove the two screws (E). Remove the fan. Ozone fan duct removal Remove the port access door. See “Port access door removal” on page 278. Remove the controller board access cover. See “Controller board access cover removal” on page 345.
Page 379: Center Cable Guide Bracket Removal
7421 Center cable guide bracket removal Note: This part is not a FRU. Remove the port access door. See “Port access door removal” on page 278. Remove the controller board access cover. See “Controller board access cover removal” on page 345.
Page 380 7421 Disconnect the cable (A), remove the four screws (B), and then remove the bracket. Remove the two screws (C), and then disconnect the two cables (D). Note: We recommend using long nose pliers to disconnect the cables. Repair information...
Page 381 7421 Disconnect the two cables (E), and then release the cables from the assembly cable clips. Remove the nine screws (F), and then remove the ground screw (G). Repair information...
Page 382: Toner Cartridge Drive Assembly Removal
7421 Open the right door, and then remove the screw (H). Remove the assembly. Toner cartridge drive assembly removal Remove the scanner interface cable cover. See “Scanner interface cable cover removal” on page 344. Remove the controller board access cover. See “Controller board access cover removal”...
Page 383: Duplex Transport Clutch Removal
7421 Remove the screw (A), and then remove the guide. Remove the three screws (B), and then release the cables from the guides. Remove the assembly. Duplex transport clutch removal Remove the port access door. See “Port access door removal” on page 278.
Page 384: Motor (Fuser) Removal
7421 Remove the two screws (A), remove the bracket, and then remove the clip (B). Remove the clutch. Motor (fuser) removal Remove the port access door. See “Port access door removal” on page 278. Remove the scanner interface cable cover. See “Scanner interface cable cover removal”...
Page 385: Fuser Drive Gearbox Removal
7421 Remove the screw (A), and then remove the guide. Disconnect the cable (B), and then remove the four screws (C). Slightly lift the motor to release, and then remove it. Fuser drive gearbox removal Remove the port access door. See “Port access door removal”...
Page 386 7421 Remove the upper rear cover. See “Upper rear cover removal” on page 346. Remove the IHPS shield. See “IHPS shield removal” on page 347. From the right, release the two clips (A), remove the two gears, and then release the belt. From the rear, disconnect the four cables (B), and then remove the six screws (C).
Page 387: Toner Suction Fan Removal
7421 Toner suction fan removal Remove the left cover. See “Left cover removal” on page 272. Remove the rear left cover. See “Rear left cover removal” on page 273. Remove the port access door. See “Port access door removal” on page 278.
Page 388 7421 Remove the three screws (C), and then remove the fan duct. Remove the screw (D), and then remove the bracket. Repair information...
Page 389: Top Side Removals
7421 Remove the two screws (E), and then remove the fan. Top side removals Standard bin base removal Remove the left cover. See “Left cover removal” on page 272. Remove the standard bin base. Transfer belt fan removal Remove the left cover. See “Left cover removal”...
Page 390: Bin Side Cover Removal
7421 Remove the screw (A), and then remove the cover. Disconnect the cable (B), and then remove the two screws (C). Release the latches (D), and then open the case. Remove the fan. Bin side cover removal Remove the left cover. See “Left cover removal”...
Page 391: Adf And Scanner Removals
7421 Remove the two screws (A), and then remove the cover. ADF and scanner removals ADF assembly removal Note: Make sure to perform ADF height adjustment after replacing the ADF assembly. See “ADF height adjustment” on page 258. Remove the screw (A) securing the ADF rear cable access cover, and then remove the cover. Remove the controller board cover.
Page 392 7421 Disconnect the cable (B) from the controller board. Installation note: Connect the scanner CCD cable (A) and ADF CIS data cable (B) as shown in the illustration. If the cables are connected to the wrong socket, then an invalid scanner code error occurs. Repair information...
Page 393 7421 Disconnect the three cables (C), and then release them from the holder (D). Open the ADF, and then remove the two screws (D). Repair information...
Page 394: Adf Cis Assembly Removal
7421 Remove the ADF. Warning—Potential Damage: Do not break the ADF angle open actuator. ADF CIS assembly removal Remove the ADF front cover. See “ADF front cover removal” on page 402. Remove the ADF rear cover. See “ADF rear cover removal” on page 410.
Page 395 7421 Disconnect the two cables (A), and then remove the screw (B). Remove the two screws (C) from the front and two screws (D) from the rear of the ADF. Slide the CIS assembly, and then lift the rear end to remove. Repair information...
Page 396: Adf Cis Power Supply Board Removal
7421 ADF CIS power supply board removal Remove the ADF rear cover. See “ADF rear cover removal” on page 410. Remove the ADF registration guide. See “ADF registration guide removal” on page 410. Disconnect the two cables (A), and then remove the two screws (B). Remove the ADF CIS power supply board.
Page 397 7421 Remove the three screws (A), and then remove the screw (B). Slightly raise the scanner front cover, and then remove the ADF duplex scan glass. Installation note: Make sure that the ADF duplex scan glass and scanner glass are properly aligned. Repair information...
Page 398: Adf Fan Removal
7421 ADF fan removal Remove the ADF rear cover. See “ADF rear cover removal” on page 410. Disconnect the cable (A), and then remove the fan. ADF feed and pick roller assembly removal Open the ADF top cover. Remove the clip (A), gear (B), and screw (C). Remove the pin (D) and bushing (E).
Page 399 7421 Note: Do not lose the pin. Remove the clip (F), and then slide the bushing (G) out of the bracket. Slide out, and then remove the feed and pick roller assembly. Repair information...
Page 400: Adf Feed Roller Removal
7421 ADF feed roller removal Remove the ADF feed and pick roller assembly. See “ADF feed and pick roller assembly removal” on page 398. Remove the three clips from the roller arms. Note: Do not lose the pin on the pick roller. Repair information...
Page 401 7421 Release the latches (A), and then remove the feed roller arms (B). Repair information...
Page 402: Adf Front Cover Removal
7421 Remove the levers (C), clips (D), and feed rollers (E). ADF front cover removal Open the ADF. Remove the two screws (A) from the ADF front cover. Remove the cover. Repair information...
Page 403: Adf Glass Cleaning Roller Removal
7421 ADF glass cleaning roller removal Remove the ADF assembly. See “ADF assembly removal” on page 391. Remove the clips (A) from the ADF glass cleaning roller, and then remove the bushing (B) and belt (C). Remove the roller. Installation notes: Install the two bushings (A) on the brackets, and then install the housing (B) with its notch (C) on the underside of the housing.
Page 404 7421 Make sure that the plastic strip (D) does not come into contact with the housing when fully inserted. Slightly pull out the left bracket (E), and then insert the roller (F) into the bushing. Push the roller to the right to insert the right side of the roller. Note: Make sure that the white side of the roller is facing up.
Page 405 7421 Set the ADF glass cleaning actuator (G) to the home position. Install the gear (H) and belt (I) on the left side of the roller. Repair information...
Page 406: Adf Left Hinge Removal
7421 ADF left hinge removal Remove the ADF assembly. See “ADF assembly removal” on page 391. Remove the five screws (A) securing the left hinge. Remove the hinge. Repair information...
Page 407: Adf Pick Roller Removal
7421 ADF pick roller removal Remove the ADF feed and pick roller assembly. See “ADF feed and pick roller assembly removal” on page 398. Remove the three clips from the roller arms. Note: Do not lose the pin on the pick roller. Repair information...
Page 408 7421 Release the two latches (A) from the two feed roller arms, and then remove the feed roller arms (B). Remove the two clips from the pick roller, and then remove the pick roller (C). Note: Do not lose the pins on the pick roller. Repair information...
Page 409: Adf Right Hinge Removal
7421 ADF right hinge removal Remove the ADF assembly. See “ADF assembly removal” on page 391. Remove the four screws (A) securing the right hinge. Remove the hinge. Repair information...
Page 410: Adf Rear Cover Removal
7421 ADF rear cover removal Open the ADF. Remove the four screws (A) securing the ADF rear cover. Close the ADF. Open the ADF top cover, and then remove the ADF rear cover. ADF registration guide removal Remove the ADF front cover. See “ADF front cover removal”...
Page 411: Adf Scan/Exit Roller Belt Removal
7421 Remove the 10 screws (A). Lift the part, and then slide it to remove. ADF scan/exit roller belt removal Remove the ADF front cover. See “ADF front cover removal” on page 402. Pry the latch to release the gear from the shaft. Repair information...
Page 412: Adf Separator Pad Removal
7421 Pull out the gear, and then remove the belt (A). ADF separator pad removal Open the ADF top cover. Remove the ADF separator pad. ADF separator roller removal Open the ADF top cover. Press the sides of the ADF separator pad housing, and then pull to release it. Remove the ADF separator roller.
Page 413: Adf Top Cover Assembly Removal
7421 ADF top cover assembly removal Remove the ADF front cover. See “ADF front cover removal” on page 402. Remove the ADF rear cover. See “ADF rear cover removal” on page 410. Disconnect the J14 cable from the ADF controller board. Remove the ground screw (A) from the rear of the ADF top cover assembly.
Page 414: Adf Tray Removal
7421 Remove the five screws (A), and then remove the ADF top cover. ADF tray removal Remove the ADF rear cover. See “ADF rear cover removal” on page 410. Remove the ADF tray bottom cover. See “ADF tray bottom cover removal” on page 415.
Page 415: Adf Tray Bottom Cover Removal
7421 ADF tray bottom cover removal Note: This part is not a FRU. Remove the ADF paper stop (A), and then remove the six screws (B). Remove the ADF tray bottom cover. Sensor (ADF CIS clean) removal Remove the ADF rear cover. See “ADF rear cover removal”...
Page 416: Sensor (Adf Jam Access Cover) Removal
7421 Remove the clip (A), and then remove the three screws (B). Remove the bracket, and then disconnect the cable. Remove the sensor. Sensor (ADF jam access cover) removal Remove the ADF front cover. See “ADF front cover removal” on page 402.
Page 417: Sensor (Adf Scan Shaft Home) Removal
7421 Sensor (ADF scan shaft home) removal Remove the ADF rear cover. See “ADF rear cover removal” on page 410. Disconnect the cable (A). Rotate the gear until the sensor (B) is unblocked, and then remove the sensor. Repair information...
Page 418: Sensor (Adf Top Cover Open) Removal
7421 Sensor (ADF top cover open) removal Remove the ADF rear cover. See “ADF rear cover removal” on page 410. Disconnect the cable (A), and then remove the sensor. Repair information...
Page 419: Sensor (Scan Glass Clean) Removal
7421 Sensor (scan glass clean) removal Remove the ADF front cover. See “ADF front cover removal” on page 402. Remove the screw (A). Disconnect the cable, and then remove the sensor. Sensor (scanner cover open) removal Remove the ADF assembly. See “ADF assembly removal”...
Page 420: Sensor (Scanner Cover Switch) Removal
7421 Disconnect the cable (A), and then remove the screw (B). Remove the actuator. Remove the sensor. Sensor (scanner cover switch) removal Remove the scanner left cover. See “Scanner left cover removal” on page 429. Remove the control panel bottom cover. See “Control panel bottom cover removal”...
Page 421: Sensor (Scanner Lamp Home) Removal
7421 Remove the speaker frame. Remove the control panel. See “Control panel removal” on page 341. Remove the control panel base. See “Control panel base removal” on page 440. Disconnect the sensor cable (A), and then remove the screw (B) to remove the sensor. Sensor (scanner lamp home) removal Remove the ADF assembly.
Page 422: Sensor (Scanner Paper Length 1) Removal
7421 Remove the screw (A), and then remove the cable (B) from the sensor housing. Disconnect the cable from the sensor. Sensor (scanner paper length 1) removal Remove the scanner rear cover. See “Scanner rear cover removal” on page 430. Remove the scanner top cover.
Page 423: Sensor (Scanner Paper Length 2) Removal
7421 Disconnect the cable (A), and then remove the screw (B). Remove the sensor. Sensor (scanner paper length 2) removal Remove the scanner rear cover. See “Scanner rear cover removal” on page 430. Remove the scanner top cover. See “Scanner top cover removal” on page 430.
Page 424: Sensors (Adf Tray Section) Removal
7421 Disconnect the cable (A), and then remove the screw (B). Remove the sensor. Sensors (ADF tray section) removal Remove the ADF front cover. See “ADF front cover removal” on page 402. Remove the ADF tray bottom cover. See “ADF tray bottom cover removal” on page 415.
Page 425: Sensors (Adf Top Open Cover Section) Removal
7421 # Description 1 Sensor (ADF paper length 1) 2 Sensor (ADF paper width) 3 Sensor (ADF paper length 2) Sensors (ADF top open cover section) removal Remove the ADF front cover. See “ADF front cover removal” on page 402. Remove the ADF rear cover.
Page 426: Scanner Ccd Lens Assembly Removal
7421 Scanner CCD lens assembly removal Remove the scanner rear cover. See “Scanner rear cover removal” on page 430. Remove the scanner top cover. See “Scanner top cover removal” on page 430. Remove the scanner right cover. See “Scanner right cover removal” on page 430.
Page 427 7421 Disconnect the three cables (B), and then remove the two screws (C). Installation note: Make sure to reinstall the scanner CCD cable with its metal component facing up. Repair information...
Page 428: Scanner Controller Board Removal
7421 Remove the scanner CCD lens assembly. Scanner controller board removal Remove the ADF assembly. See “ADF assembly removal” on page 391. Remove the scanner rear cover. See “Scanner rear cover removal” on page 430. Disconnect the connectors, and then remove the three screws (A). Remove the board.
Page 429: Scanner Left Cover Removal
7421 Remove the scanner top cover. See “Scanner top cover removal” on page 430. Remove the scanner right cover. See “Scanner right cover removal” on page 430. Remove the two screws (A), and then remove the scanner glass retainers. Gently slide out the scanner glass. Scanner left cover removal Open the ADF.
Page 430: Scanner Rear Cover Removal
7421 Scanner rear cover removal Remove the two screws (A). Remove the cover. Scanner right cover removal Open the ADF. Remove the three screws (A), and then remove the scanner right cover. Scanner top cover removal Remove the ADF assembly. See “ADF assembly removal”...
Page 431: Motor (Adf Cis Clean) Removal
7421 Remove the four screws (A), and then remove the scanner top cover. Motor (ADF CIS clean) removal Remove the ADF rear cover. See “ADF rear cover removal” on page 410. Remove the two screws (A). Release the motor (B) from the motor belt (C). Note: Use a spring hook.
Page 432: Motor (Adf Scan Shaft Release) Removal
7421 Disconnect the cable from the motor, and then remove the motor. Motor (ADF scan shaft release) removal Remove the ADF rear cover. See “ADF rear cover removal” on page 410. Disconnect the cable (A) from the ADF scan shaft home sensor. Remove the two screws (B).
Page 433: Motor (Adf Feed) Removal
7421 Disconnect the J18 cable (C). Remove the J18 cable (C) from the cable harness, and then remove the motor. Motor (ADF feed) removal Remove the ADF rear cover. See “ADF rear cover removal” on page 410. Disconnect the feed motor cable (A), and then remove the two screws (B). Note: Do not to lose the ground plate.
Page 434 7421 Remove the three screws (C), and then remove the motor. Repair information...
Page 435: Motor (Adf Scan) Removal
7421 Remove the two screws (D), and then remove the motor from the bracket. Motor (ADF scan) removal Remove the ADF rear cover. See “ADF rear cover removal” on page 410. Remove the motor (ADF registration). See “Motor (ADF registration) removal” on page 436.
Page 436: Motor (Adf Registration) Removal
7421 Remove the three screws (C), and then remove the belt (D). Remove the motor from the ADF, and then remove the motor from the bracket. Motor (ADF registration) removal Remove the ADF rear cover. See “ADF rear cover removal” on page 410.
Page 437 7421 Remove the two screws (A), and then remove the cable harness. Disconnect the cable (B), and then remove the four screws (C). Remove the motor from the ADF. Remove the motor from its bracket. Repair information...
Page 438 7421 Installation notes: Loosen the screw (D). Use a flat-head screw driver to push the spring towards the left of the ADF, and then retighten the screw. Replace the motor, and then loosen the screw to engage the belt onto the motor. Repair information...
Page 439: Motor (Cis Glass Clean) Removal
7421 Tighten the screw (E) to secure the belt onto the motor. Motor (CIS glass clean) removal Remove the ADF front cover. See “ADF front cover removal” on page 402. Disconnect the cable (A), and then remove the two screws (B). Remove the motor (C).
Page 440: Motor (Scanner Drive) Removal
7421 Motor (scanner drive) removal Note: Make sure to perform scanner carriage belt adjustment after replacing the motor (scanner drive). See “Scanner carriage belt adjustment” on page 267. Remove the ADF assembly. See “ADF assembly removal” on page 391. Remove the scanner rear cover. See “Scanner rear cover removal”...
Page 441 7421 Remove the screw (A), and then detach the scanner front cover. Remove the two screws (B), and then disconnect the cable from the cave light PCB. Remove the cave light, and then remove the cable from the control panel base. Repair information...
Page 442: Control Panel Bottom Cover Removal
7421 Control panel bottom cover removal Remove the scanner left cover. See “Scanner left cover removal” on page 429. Remove the screw (A), peel off the screw cover (B), and then remove the second screw. Slide the cover left to remove. 2500-sheet tray removals 2500-sheet tray caster wheel removal Position the tray on its side.
Page 443: 2500-Sheet Tray Controller Board Removal
7421 Remove the two screws (A), and then remove the caster. 2500-sheet tray controller board removal Remove the tray rear cover. See “2500-sheet tray rear cover removal” on page 446. Disconnect the cables, and then remove the four screws (A). Remove the controller board.
Page 444: 2500-Sheet Tray Led Cover Removal
7421 2500-sheet tray LED cover removal Open the tray. Remove the four screws (A), and then remove the cover. 2500-sheet tray front right cover removal Remove the 2500-sheet tray LED cover. See “2500-sheet tray LED cover removal” on page 444. Remove the two screws (A), and then remove the cover.
Page 445: 2500-Sheet Tray Left Cover Removal
7421 2500-sheet tray left cover removal Remove the five screws (A). Remove the cover. 2500-sheet tray lower right cover removal Remove the two screws (A). Remove the cover. Repair information...
Page 446: 2500-Sheet Tray Empty Led Removal
7421 2500-sheet tray empty LED removal Remove the 2500-sheet tray LED cover. See “2500-sheet tray LED cover removal” on page 444. Disconnect the cable (A), and then remove the screw (B). Remove the LED. 2500-sheet tray rear cover removal Remove the five screws (A). Remove the cover.
Page 447: 2500-Sheet Tray Rear Right Cover Removal
7421 2500-sheet tray rear right cover removal Remove the two screws (A). Remove the cover. 2500‑sheet tray division board removal Remove the tray insert. Disconnect the two cables (A), and then remove the two screws (B). Repair information...
Page 448: 2500-Sheet Tray Main Tray Empty Sensor Bottom Actuator Removal
7421 Remove the division board, and then remove the sensors (C). Installation note: Install the sensors on the new division board. 2500‑sheet tray main tray empty sensor bottom actuator removal Remove the tray insert. Slightly raise the main tray. Repair information...
Page 449: 2500-Sheet Tray Elevator Home Sensor Actuator Removal
7421 Remove the actuator (C). 2500‑sheet tray elevator home sensor actuator removal Remove the tray insert. Slightly raise the main tray. Rotate the actuator (C) until it is in the upright position, and then slide out to remove. Note: Take note of the position of the spring on the actuator. Repair information...
Page 450: 2500-Sheet Tray Transfer Guide Stop Removal
7421 2500‑sheet tray transfer guide stop removal Remove the tray insert. Slightly raise the main tray. Remove the actuator (C). Note: Do not lose the spring on the actuator. Repair information...
Page 451: 2500-Sheet Reserve Tray Paper Limit Sensor Actuator Removal
7421 2500‑sheet reserve tray paper limit sensor actuator removal Remove the tray insert. Disconnect the two cables (A), and then remove the two screws (B). Repair information...
Page 452: 2500-Sheet Tray Vertical Media Transport Guide Assembly Removal
7421 Remove the division board, and then remove the actuator (C). 2500‑sheet tray vertical media transport guide assembly removal Remove the rear right cover. See “2500-sheet tray rear right cover removal” on page 447. Remove the paper feed assembly. See “2500-sheet tray paper feed assembly removal”...
Page 453: 2500-Sheet Tray Transport Roller Removal
7421 Remove the vertical media transport guide assembly (D) from the shafts. 2500‑sheet tray transport roller removal Remove the rear right cover. See “2500-sheet tray rear right cover removal” on page 447. Remove the paper feed assembly. See “2500-sheet tray paper feed assembly removal” on page 456.
Page 454: 2500-Sheet Tray Jam Access Cover Removal
7421 Remove the clip on the left side (D), and then remove the five screws (E). Remove the roller. 2500-sheet tray jam access cover removal Open the jam access cover. Remove the screw (A). Repair information...
Page 455: 2500-Sheet Tray Jam Access Door Strap Removal
7421 Pry the right hinge to release, and then remove the cover. 2500-sheet tray jam access door strap removal Open the jam access cover. Remove the two screws (A), and then remove the strap. Repair information...
Page 456: 2500-Sheet Tray Paper Feed Assembly Removal
7421 2500-sheet tray paper feed assembly removal Open the rear right cover. See “2500-sheet tray rear right cover removal” on page 447. Disconnect the two cables (A). Remove the four screws (B), and then remove the paper feed assembly. 2500-sheet tray pick assembly removal Remove the 2500-Sheet Tray rear right cover.
Page 457: 2500-Sheet Tray Paper Stack Transfer Guide Removal
7421 Remove the sensor (2500-sheet tray main tray empty, top). See “Sensor (2500‑sheet tray main tray empty, top) removal” on page 467. Remove the 2500-sheet tray transport roller. See “2500‑sheet tray transport roller removal” on page 453. Remove the three screws (A), two clips (B), and gear (C). Remove the three screws (D), and then remove the pick assembly.
Page 458 7421 Remove the sub-tray plate (D). Move the paper stack transfer guide base (E), and then remove the two screws (F). Remove the bracket, and then remove the guide base. Repair information...
Page 459: 2500-Sheet Reserve Tray Empty Sensor Actuator Removal
7421 2500-sheet reserve tray empty sensor actuator removal Remove the tray insert. Remove the screw (A). Swing open the sensor cover, and then remove the actuator (B). 2500‑sheet tray stopper removal Position the tray on its side. Select a stopper. Repair information...
Page 460: Motor (2500-Sheet Tray Elevator) Removal
7421 Remove the two screws (A), and then remove the stopper. Motor (2500‑sheet tray elevator) removal Remove the rear cover. See “2500-sheet tray rear cover removal” on page 446. Disconnect the cable (A), and then remove the three screws (B). Remove the motor.
Page 461: Motor (2500-Sheet Tray Feed) Removal
7421 Motor (2500‑sheet tray feed) removal Remove the rear cover. See “2500-sheet tray rear cover removal” on page 446. Disconnect the cable (A), and then remove the three screws (B). Remove the motor. Note: Make sure that the feed motor belt (C) remains attached to the gear. Installation note: Make sure that the feed motor belt is installed properly before installing the feed motor.
Page 462: Motor (2500-Sheet Tray Transfer Guide) Removal
7421 Motor (2500‑sheet tray transfer guide) removal Remove the rear cover. See “2500-sheet tray rear cover removal” on page 446. Disconnect the cable (A), and then remove the three screws (B). Remove the motor. Motor (2500‑sheet tray transport) removal Remove the 2500‑sheet tray rear cover. See “2500-sheet tray rear cover removal”...
Page 463: Sensor (2500-Sheet Tray Jam Access Door) Removal
7421 Note: Make sure that the belt (C) remains on the gear. Installation note: Make sure that the belt is installed properly before reinstalling the transport motor. Sensor (2500‑sheet tray jam access door) removal Remove the screw (A), and then remove the sensor mount. Repair information...
Page 464: Sensor (2500-Sheet Paper Stack Transfer) Removal
7421 Disconnect the sensor (B) from the cable. Sensor (2500‑sheet paper stack transfer) removal Remove the tray insert. Disconnect the cable (A), and then remove the two screws (B). Remove the sensor from its housing on the division board. Repair information...
Page 465: Sensor (2500-Sheet Tray Elevator Home) Removal
7421 Sensor (2500‑sheet tray elevator home) removal Remove the tray insert. Remove the 2500-sheet tray elevator home sensor actuator. See “2500‑sheet tray elevator home sensor actuator removal” on page 449. Disconnect the cable (A), and then remove the sensor (B). Sensor (2500‑sheet tray main tray empty, bottom) removal Remove the tray insert.
Page 466: Sensor (2500-Sheet Tray Main Tray Near Empty) Removal
7421 Disconnect the cable (A), and then remove the sensor (B). Sensor (2500‑sheet tray main tray near empty) removal Remove the tray insert. Disconnect the cable (A), and then remove the sensor (B). Repair information...
Page 467: Sensor (2500-Sheet Tray Main Tray Empty, Top) Removal
7421 Sensor (2500‑sheet tray main tray empty, top) removal Disconnect the cable (A). Remove the sensor. Sensor (2500‑sheet tray main tray elevator limit) removal Disconnect the cable (A). Remove the sensor. Repair information...
Page 468: Sensor (2500-Sheet Tray Feed) Removal
7421 Sensor (2500‑sheet tray feed) removal Remove the five screws (A). Disconnect the cable (B), and then remove the sensor. Repair information...
Page 469: Sensor (2500-Sheet Tray Reserve Tray Empty) Removal
7421 Sensor (2500‑sheet tray reserve tray empty) removal Remove the tray insert. Remove the screw (A). Swing open the cover, and then disconnect the cable (B). Remove the sensor. Repair information...
Page 470: Sensor (2500-Sheet Tray Reserve Tray Paper Limit) Removal
7421 Sensor (2500‑sheet tray reserve tray paper limit) removal Remove the tray insert. Disconnect the cable (A), and then remove the two screws (B). Remove the sensor. Sensor (2500‑sheet tray transfer guide home) removal Remove the tray insert. Remove the screw (A). Repair information...
Page 471: Sensor (2500-Sheet Tray Set) Removal
7421 Swing open the cover, and then disconnect the cable (B). Remove the sensor. Sensor (2500-sheet tray set) removal Remove the tray insert. Remove the sensor, and then disconnect the sensor cable. Repair information...
Page 472: Sensor (2500-Sheet Tray Transport) Removal
7421 Sensor (2500‑sheet tray transport) removal Remove the five screws (A). Disconnect the cable (B), and then remove the sensor. Repair information...
Page 473: X 500-Sheet Tray Removals
7421 2 x 500-sheet tray removals Sensor (2 x 500-sheet tray jam access door) removal Remove the screw (A), and then remove the sensor bracket. Disconnect the cable (B), and then remove the sensor. Remove the sensor from the bracket. Repair information...
Page 474: X 500-Sheet Tray Caster Wheel Removal
7421 2 x 500-sheet tray caster wheel removal Position the tray on its side. Select a caster. Remove the two screws (A), and then remove the caster. Printer rubber stopper removal Position the tray on its side. Select a stopper. Repair information...
Page 475: Tray Insert Paper Length Guide Removal
7421 Remove the two screws (A), and then remove the stopper. Tray insert paper length guide removal Remove the tray insert. Move the guide to the shortest paper length setting. Repair information...
Page 476 7421 Remove the screw (A). Raise the lift plate, move the length guide slightly under the lift plate, and then remove the guide. Repair information...
Page 477: Tray Lock Removal
7421 Tray lock removal Remove the tray insert. Remove the two screws (A). Remove the tray cover. Repair information...
Page 478 7421 Disconnect the spring (B) from the tray, and then remove the shaft. Remove the two screws (C), and then remove the plate. Repair information...
Page 479: X 500-Sheet Tray Rollers Removal
7421 Align the notches on the link and cover, and then remove the link. 2 x 500-sheet tray rollers removal Remove the tray inserts. Open the jam access door. Release the three clips (A), and then remove the rollers. Sensor (2 x 500-sheet tray paper length) removal Remove the tray inserts.
Page 480 7421 Remove the screw, press the latch, and then remove the sensor holder. Part Sensor (2 x 500 sheet tray 3 paper length) Sensor (2 x 500 sheet tray 4 paper length) Remove the screw (A), and then remove the sensor. Repair information...
Page 481: X 500-Sheet Tray Left Cover Removal
7421 2 x 500-sheet tray left cover removal Remove the five screws (A). Remove the cover. 2 x 500-sheet tray empty LED cover removal Remove the four screws (A). Repair information...
Page 482: X 500-Sheet Tray Empty Led Removal
7421 Remove the cover. 2 x 500-sheet tray empty LED removal Remove the tray empty LED cover. See “2 x 500-sheet tray empty LED cover removal” on page 481. Disconnect the cable. Remove the screw, and then remove the LED. Part Tray 3 tray empty LED Tray 4 tray empty LED...
Page 483: X 500-Sheet Tray Rear Cover Removal
7421 Remove the two screws (A), and then remove the cover. Remove all of the cable holders from the cover. 2 x 500-sheet tray rear cover removal Remove the five screws (A). Remove the cover. Motor (2 x 500-sheet tray lift) removal Remove the rear cover.
Page 484: Sensor (2 X 500-Sheet Tray Near Empty) Removal
7421 Remove the three screws, and then remove the motor. Part Motor (2 x 500-sheet tray 3 lift) Motor (2 x 500-sheet tray 4 lift) Sensor (2 x 500-sheet tray near empty) removal Remove the tray inserts. Disconnect the cable from the sensor, and then remove the sensor. Repair information...
Page 485: Sensor (2 X 500-Sheet Tray Paper Width) Removal
7421 Part Sensor (2 x 500-sheet tray 3 near empty) Sensor (2 x 500-sheet tray 4 near empty) Sensor (2 x 500-sheet tray paper width) removal Remove the rear cover. See “2 x 500-sheet tray rear cover removal” on page 483.
Page 486: X 500-Sheet Tray Feed And Transport Motors Removal
7421 Remove the screw (A), and then remove the sensor. Installation note: Toggle the sensor to make sure that it bounces back. 2 x 500-sheet tray feed and transport motors removal Remove the rear cover. See “2 x 500-sheet tray rear cover removal” on page 483.
Page 487: X 500-Sheet Tray Controller Board Removal
7421 Remove the three screws, and then remove the motor. Part Motor (2 x 500‑sheet tray 3 feed) Motor (2 x 500‑sheet tray 4 feed) Motor (2 x 500‑sheet tray 4 transport) Motor (2 x 500‑sheet tray 3 transport) 2 x 500-sheet tray controller board removal Remove the rear cover.
Page 488: X 500-Sheet Tray Jam Access Door Removal
7421 Remove the four screws (A), and then remove the board. 2 x 500-sheet tray jam access door removal Open the door, and then remove the screw (A). Repair information...
Page 489: X 500-Sheet Tray Rear Right Cover Removal
7421 Pry to release the hinge, and then remove the cover. 2 x 500-sheet tray rear right cover removal Remove the two screws (A). Remove the cover. Repair information...
Page 490: X 500-Sheet Tray Bottom Right Cover Removal
7421 2 x 500-sheet tray bottom right cover removal Remove the two screws (A). Remove the cover. 2 x 500-sheet tray 3 transport assembly removal Remove the rear right cover. See “2 x 500-sheet tray rear right cover removal” on page 489.
Page 491: X 500-Sheet Tray 4 Transport Assembly Removal
7421 Remove the assembly. 2 x 500-sheet tray 4 transport assembly removal Remove the rear right cover. See “2 x 500-sheet tray rear right cover removal” on page 489. Remove the jam access door. See “2 x 500-sheet tray jam access door removal” on page 488.
Page 492: X 500-Sheet Tray Transport Assembly Sensors Removal
7421 2 x 500-sheet tray transport assembly sensors removal Note: The following procedure begins with the tray 4 transport assembly sensors. If you are removing the tray 3 transport assembly sensors, then go directly to step 5. Remove the rear right cover. See “2 x 500-sheet tray rear right cover removal”...
Page 493: X 500-Sheet Tray Tray Set Actuator Removal
7421 Part 2 x 500-sheet tray empty sensor actuator Sensor (2 x 500-sheet tray empty) Sensor (2 x 500-sheet tray lift plate level) Sensor (2 x 500-sheet tray feed) Note: Remove the screw, remove the sensor bracket, and then remove the sensor. 2 x 500‑sheet tray tray set actuator removal Remove the rear right cover.
Page 494: Sensor (2 X 500-Sheet Tray Transport) Removal
7421 Remove the clip (B). Remove the shaft, and then remove the actuator. Sensor (2 x 500-sheet tray transport) removal Note: The following procedure begins with the tray 4 sensor. If you are removing the tray 3 sensor, then go directly to step 5.
Page 495: X 500-Sheet Tray 3 Transport Belts And Gears Removal
7421 Remove the five screws (A). Disconnect the cable (B), and then remove the sensor. 2 x 500-sheet tray 3 transport belts and gears removal Remove the rear right cover. See “2 x 500-sheet tray rear right cover removal” on page 489.
Page 496: X 500-Sheet Tray 4 Transport Belts And Gears Removal
7421 Remove the three screws (A), and then remove the bracket. Remove the three gears and two belts. 2 x 500-sheet tray 4 transport belts and gears removal Remove the rear right cover. See “2 x 500-sheet tray rear right cover removal” on page 489.
Page 497 7421 Remove the three screws (A), and then remove the bracket. Remove the three gears and two belts. Repair information...
Page 498: 3000-Sheet Tray Removals
7421 3000-sheet tray removals 3000-sheet tray rollers removal Remove the two clips (A), and then remove the bushings. Remove the two clips (B), and then remove the actuator (C). Repair information...
Page 499 7421 Remove the two clips (D), and then remove the feed and pick rollers. Remove the four screws (E), and then remove the cover. Repair information...
Page 500: 3000-Sheet Tray Feed And Pick Belt Removal
7421 Remove the clip (F), and then remove the roller. 3000-sheet tray feed and pick belt removal Remove the feed and pick rollers. See “3000-sheet tray rollers removal” on page 498. Remove the two clips (A), and then remove the bushings. Repair information...
Page 501 7421 Remove the two clips (B), and then remove the two bushings. Remove the clip (C). Repair information...
Page 502: 3000-Sheet Tray Caster Wheel Removal
7421 Remove the clip (D). Remove the pin (E). Pull out the shaft (F), and then remove the belt. 3000-sheet tray caster wheel removal Remove the right cover. See “3000-sheet tray right cover removal” on page 505. Depending on the caster to remove, remove the front cover or the rear cover. See “3000-sheet tray front cover removal”...
Page 503: 3000-Sheet Tray Release Handle Removal
7421 Remove the nut (A), and then remove the caster. 3000-sheet tray release handle removal Remove the right cover. See “3000-sheet tray right cover removal” on page 505. Remove the front cover. See “3000-sheet tray front cover removal” on page 505.
Page 504: 3000-Sheet Tray Left Cover Removal
7421 Remove the two screws (C), and then remove the handle. 3000-sheet tray left cover removal Remove the four screws (A). Remove the cover. Repair information...
Page 505: 3000-Sheet Tray Right Cover Removal
7421 3000-sheet tray right cover removal Remove the four screws (A). Remove the cover. 3000-sheet tray front cover removal Remove the right cover. See “3000-sheet tray right cover removal” on page 505. Disconnect the cable (A), and then remove it from the cable clips. Remove the three screws (B).
Page 506: 3000-Sheet Tray Rear Cover Removal
7421 Remove the two screws (C), and then remove the cover. 3000-sheet tray rear cover removal Remove the right cover. See “3000-sheet tray right cover removal” on page 505. Remove the three screws (A). Repair information...
Page 507: 3000-Sheet Tray Door Removal
7421 Remove the two screws (B). Remove the two screws (C). Remove the plate, and then remove the cover. 3000-sheet tray door removal Remove the right cover. See “3000-sheet tray right cover removal” on page 505. Remove the rear cover. See “3000-sheet tray rear cover removal”...
Page 508: 3000-Sheet Tray Left Top Cover Removal
7421 Remove the two screws (B), and then remove the bracket. Remove the door. 3000-sheet tray left top cover removal Remove the right cover. See “3000-sheet tray right cover removal” on page 505. Remove the front cover. See “3000-sheet tray front cover removal” on page 505.
Page 509: Dehumidifier Removal
7421 Remove the two screws (A), and then remove the cover. Dehumidifier removal Remove the right cover. See “3000-sheet tray right cover removal” on page 505. Disconnect the cable (A). Remove the four screws (B), and then remove the dehumidifier. Repair information...
Page 510: 3000-Sheet Tray Empty Led Removal
7421 3000-sheet tray empty LED removal Remove the right cover. See “3000-sheet tray right cover removal” on page 505. Remove the front cover. See “3000-sheet tray front cover removal” on page 505. Remove the screw (A), and then remove the LED. Sensor (3000-sheet tray empty) removal Remove the right cover.
Page 511: Sensor (3000-Sheet Tray Elevator Level) Removal
7421 Disconnect the cable (A), and then remove the sensor. Sensor (3000-sheet tray elevator level) removal Remove the right cover. See “3000-sheet tray right cover removal” on page 505. Remove the rear cover. See “3000-sheet tray rear cover removal” on page 506.
Page 512: Sensor (3000-Sheet Tray Feed) Removal
7421 Sensor (3000-sheet tray feed) removal Remove the right cover. See “3000-sheet tray right cover removal” on page 505. Remove the rear cover. See “3000-sheet tray rear cover removal” on page 506. Remove the front cover. See “3000-sheet tray front cover removal” on page 505.
Page 513: 3000-Sheet Tray Elevator Spring Removal
7421 3000-sheet tray elevator spring removal Remove the right cover. See “3000-sheet tray right cover removal” on page 505. Remove the front cover. See “3000-sheet tray front cover removal” on page 505. Remove the spring (A). 3000-sheet tray controller board removal Remove the right cover.
Page 514: 3000-Sheet Tray Door Switch Removal
7421 Remove the four screws (A), and then remove the board. 3000-sheet tray door switch removal Remove the right cover. See “3000-sheet tray right cover removal” on page 505. Remove the rear cover. See “3000-sheet tray rear cover removal” on page 506.
Page 515: Motor (3000-Sheet Tray Elevator) Removal
7421 Motor (3000-sheet tray elevator) removal Remove the right cover. See “3000-sheet tray right cover removal” on page 505. Remove the rear cover. See “3000-sheet tray rear cover removal” on page 506. Disconnect the cable (A). Remove the three screws (B), and then remove the motor. 3000-sheet tray set sensor actuator removal Remove the right cover.
Page 516: Sensor (3000-Sheet Tray Set) Removal
7421 Remove the screw (A), and then remove the bracket. Remove the clip (B). Remove the shaft, and then remove the actuator. Sensor (3000-sheet tray set) removal Remove the right cover. See “3000-sheet tray right cover removal” on page 505. Remove the rear cover.
Page 517: Sensor (3000-Sheet Tray Near Empty) Removal
7421 Disconnect the cable (A), and then remove the sensor. Sensor (3000-sheet tray near empty) removal Remove the right cover. See “3000-sheet tray right cover removal” on page 505. Remove the rear cover. See “3000-sheet tray rear cover removal” on page 506.
Page 518 7421 Remove the six screws (B), and then remove the bracket. Disconnect the cable, and then remove the sensor. Repair information...
Page 519: Motor Bracket Removal
7421 Part Sensor (3000-sheet tray near empty 1) Sensor (3000-sheet tray near empty 2) Motor bracket removal Note: This part is not a FRU. Remove the right cover. See “3000-sheet tray right cover removal” on page 505. Remove the rear cover. See “3000-sheet tray rear cover removal”...
Page 520: 3000-Sheet Tray Feed Roller Assembly Removal
7421 Remove the two screws, and then remove the motor. Part Motor (3000-sheet tray transport) Motor (3000-sheet tray feed) 3000-sheet tray feed roller assembly removal Remove the left cover. See “3000-sheet tray left cover removal” on page 504. Remove the right cover. See “3000-sheet tray right cover removal”...
Page 521 7421 Remove the clip (A), and then remove the gear. Remove the clip (B), and then remove the bushing. Repair information...
Page 522 7421 From the other end of the shaft, remove the clip (C), and then remove the bushing. Remove the screw (D), remove the sensor bracket, and then remove the roller. Repair information...
Page 523: 3000-Sheet Tray Pick Roller Assembly Removal
7421 From under the assembly, remove the two springs (E), and then remove the roller. 3000-sheet tray pick roller assembly removal Remove the left cover. See “3000-sheet tray left cover removal” on page 504. Remove the right cover. See “3000-sheet tray right cover removal” on page 505.
Page 524 7421 Remove the three clips (B), and then remove the three gears. Remove the three clips (C), and then remove the three bushings. Remove the two screws (D). Repair information...
Page 525 7421 Remove the two screws (E), and then dislodge the bracket. Remove the three screws (F), and then remove the assembly. Disconnect the spring (G). Repair information...
Page 526 7421 Remove the clip (H), and then remove the bushing. Remove the pick roller assembly from the bracket. Remove the clip (J), and then remove the roller and the gear. Repair information...
Page 527 7421 Remove the clip (K), and then remove the bushing. Remove the shaft (L), and then remove the separator belt (M). Repair information...
Page 528 7421...
Page 529: Component Locations
7421 Component locations Exterior locations Front view Basic model Automatic document feeder (ADF) ADF tray ADF bin Control panel Multipurpose feeder Standard 2 x 500‑sheet tray Standard bin Component locations...
Page 530 7421 Configured model Staple finisher Note: The staple finisher is not supported if another finisher is installed. 3000‑sheet tray Note: The 3000‑sheet tray is supported only if the optional 2 x 500‑ or 2500‑sheet tray is installed. 2 x 500‑sheet tray 2500‑sheet tray Finisher •...
Page 531: Rear View
7421 Rear view Part name EXT port LINE port Printer power cord socket Internal Solutions Port (ISP) or printer hard disk slot Ethernet port USB ports USB printer port Component locations...
Page 532 7421...
Page 533: Maintenance
• Damaged, missing, or altered covers, especially in the area of the top and power supply covers • Possible safety exposure from any non-Lexmark attachments Use the following table to determine when to inspect the following parts: PART EVERY 50K...
Page 534: Scheduled Maintenance
7421 PART EVERY 50K EVERY 300K EVERY 600K EVERY 720K FUSER ‑‑ ‑‑ ‑‑ Fuser Replace ‑‑ ‑‑ ‑‑ Induction heater Clean DUPLEX TRANSPORT ‑‑ ‑‑ ‑‑ Transport rollers Clean For 500‑sheet trays, if jams still occur after 80K, then replace using the spare rollers in the tray compartment. Use damp cloth.
Page 535: Resetting The Maintenance Counter
7421 Part number and kit Contents 40X9669—300K Maintenance kit • Pick roller (2 units) • Feed/separator roller (4 units) • Transfer belt maintenance kit – Transfer belt – Transfer roller – Exhaust filter – Ozone filter – Printhead cleaner 40X9936—600K Developer unit 40X9046—720K Fuser...
Page 536: Cleaning The Printer Parts
7421 Cleaning the printer parts Cleaning the printer Note: You may need to perform this task after every few months. Warning—Potential Damage: Damage to the printer caused by improper handling is not covered by the printer warranty. Make sure that the printer is turned off and unplugged from the electrical outlet. CAUTION—SHOCK HAZARD: To avoid the risk of electrical shock when cleaning the exterior of the printer, unplug the power cord from the electrical outlet and disconnect all cables from the printer before proceeding.
Page 537: Cleaning The Charger And The Printhead Lens
7421 Wipe the areas shown with a soft or lint‑free cloth. White underside of the scanner cover Scanner glass ADF glass White underside of the ADF cover Close the scanner cover. Cleaning the charger and the printhead lens Open the bottom front door. Maintenance...
Page 538 7421 Remove the waste toner bottle. Locate the white tab. Gently pull the tab until it stops, and then slowly slide it back into place. Repeat three times. Maintenance...
Page 539 7421 Remove the printhead wiper. Insert the wiper into the hole until it stops, and then slide it out. Repeat three times. Put the wiper back to its holder. Reinstall the waste toner bottle. Close the bottom front door. Maintenance...
Page 540: Emptying The Hole Punch Box
7421 Emptying the hole punch box Open door H. Remove and empty the hole punch box. Maintenance...
Page 541 7421 Reinstall the hole punch box. Close door H. Maintenance...
Page 542: Parts Catalog
7421 Parts catalog Legend The following column headings are used in the parts catalog: • Asm‑index—Identifies the item in the illustration • P/N—Identifies the part number of a FRU • Units/mach—Refers to the number of units in a printer • Units/opt—Refers to the number of units in an option •...
Page 543: Assembly 1: Covers 1
7421 Assembly 1: Covers 1 Parts catalog...
Page 544 7421 Assembly 1: Covers 1 Asm-index Units/mach Units/FRU Description Removal procedure ‑‑ 40X9924 Standard bin ‑‑ 40X8901 Tray empty board cable ‑‑ 40X9758 Tray empty board mount ‑‑ 40X8903 Tray 1 empty indicator ‑‑ 40X8902 Tray empty board cover ‑‑ 40X8903 Tray 2 empty indicator ‑‑...
Page 545: Assembly 2: Covers 2
7421 Assembly 2: Covers 2 Parts catalog...
Page 546 7421 Assembly 2: Covers 2 Asm-index Units/mach Units/FRU Description Removal procedure 40X8914 Bin side cover “Bin side cover removal” on page 390 ‑‑ 40X8907 Finisher interface cable 40X8908 Upper rear cover “Upper rear cover removal” on page 346 40X9762 Scanner interface cable “Scanner interface cable cover removal”...
Page 547: Assembly 3: Inner Covers
7421 Assembly 3: Inner covers Parts catalog...
Page 548 7421 Assembly 3: Inner covers Asm-index Units/mach Units/FRU Description Removal procedure 40X8915 Waste toner bottle latch -- 40X8916 Front inner cover “Front inner cover removal” on page 328 40X9764 Waste toner door mount “Waste toner door mount removal” on page 328 40X8919 Lower front door strap 40X8917...
Page 549: Assembly 4: Control Panel 1
7421 Assembly 4: Control panel 1 Parts catalog...
Page 550 7421 Assembly 4: Control panel 1 Asm-index Units/mach Units/FRU Description Removal procedure 40X9661 Control panel “Control panel removal” on page 40X9965 USB port cover 40X9970 USB extension cable 40X9966 Speaker cover “Speaker cover removal” on page 338 40X9967 Control panel cable guide lower cover 40X9969 Control panel cable guide upper...
Page 551: Assembly 5: Control Panel 2
7421 Assembly 5: Control panel 2 Parts catalog...
Page 552 7421 Assembly 5: Control panel 2 Asm-index Units/mach Units/FRU Description Removal procedure 41X0452 Control panel cover assembly 41X0455 Control panel UICC 41X0453 Control panel cable kit 41X0454 Control panel touch screen display (10 in.) Parts catalog...
Page 553: Assembly 6: Printhead
7421 Assembly 6: Printhead Parts catalog...
Page 554 7421 Assembly 6: Printhead Asm-index Units/mach Units/FRU Description Removal procedure 40X8944 Transfer belt fan duct 40X8945 Transfer belt fan “Transfer belt fan removal” on page 389 40X8946 Image controller board “Image controller board removal” on page 329 40X9188 Ozone filter duct 40X8949 Printhead (MFP) “Printhead removal”...
Page 555: Assembly 7: Toner Supply 1
7421 Assembly 7: Toner supply 1 Parts catalog...
Page 556 7421 Assembly 7: Toner supply 1 Asm-index Units/mach Units/FRU Description Removal procedure 40X9313 Sensor (top front door) “Sensor (top front door) removal” on page 331 40X9750 Toner cartridge relay “Toner agitator removal” on page 335 contact cable 40X8962 Toner cartridge contact “Toner agitator removal”...
Page 557: Assembly 8: Toner Supply 2
7421 Assembly 8: Toner supply 2 Parts catalog...
Page 558 7421 Assembly 8: Toner supply 2 Asm-index Units/mach Units/FRU Description Removal procedure 40X8957 Toner supply motor cable 40X8956 Motor (toner supply) “Motor (toner supply) removal” on page 332 40X9751 Toner cartridge present sensor cable 40X8869 Sensor (toner cartridge present) “Sensor (toner cartridge present) removal”...
Page 559: Assembly 9: Waste Toner
7421 Assembly 9: Waste toner Parts catalog...
Page 560 7421 Assembly 9: Waste toner Asm-index Units/mach Units/FRU Description Removal procedure 40X8958 Waste toner drive “Waste toner drive removal” on page 333 40X8959 Waste toner duct Parts catalog...
Page 561: Assembly 10: Developer
7421 Assembly 10: Developer Parts catalog...
Page 562 7421 Assembly 10: Developer Asm-index Units/mach Units/FRU Description Removal procedure 40X8960 Erase LED 40X9977 Erase LED cable 40X9936 Developer unit “Developer unit removal” on page 336 Parts catalog...
Page 563: Assembly 11: Photoconductor Lock
7421 Assembly 11: Photoconductor lock Parts catalog...
Page 564 7421 Assembly 11: Photoconductor lock Asm-index Units/mach Units/FRU Description Removal procedure 40X8962 Photoconductor relay contact 40X9978 Photoconductor release lever 40X8961 Photoconductor cable Parts catalog...
Page 565: Assembly 12: Transfer Belt
7421 Assembly 12: Transfer belt Parts catalog...
Page 566 7421 Assembly 12: Transfer belt Asm-index Units/mach Units/FRU Description Removal procedure 40X8963 Transfer belt cable 40X9704 Transfer belt maintenance kit 40X9979 Transfer belt paper guide Parts catalog...
Page 567: Assembly 13: Tray 1 And 2 Transport
7421 Assembly 13: Tray 1 and 2 transport Parts catalog...
Page 568 7421 Assembly 13: Tray 1 and 2 transport Asm-index Units/mach Units/FRU Description Removal procedure 40X9980 Tray 2 transport drive gear 40X8966 Tray 1 and 2 paper feed unit Parts catalog...
Page 569: Assembly 14: Tray 1 Feed
7421 Assembly 14: Tray 1 feed Parts catalog...
Page 570 7421 Assembly 14: Tray 1 feed Asm-index Units/mach Units/FRU Description Removal procedure 40X8971 Tray 1 paper feed clutch 40X8972 Tray 1 sensor cables 40X8869 Sensor (tray 1 lift plate level) 40X9899 Tray empty sensor actuator 40X8968 Sensor (tray 1 paper feed) 40X8869 Sensor (tray 1 empty) 40X8970...
Page 571: Assembly 15: Tray 1 Separator
7421 Assembly 15: Tray 1 separator Parts catalog...
Page 572 7421 Assembly 15: Tray 1 separator Asm-index Units/mach Units/FRU Description Removal procedure 40X9455 Roller clutch 40X8970 Separator roller 40X9927 Separator roller assembly Parts catalog...
Page 573: Assembly 16: Tray 2 Feed
7421 Assembly 16: Tray 2 feed Parts catalog...
Page 574 7421 Assembly 16: Tray 2 feed Asm-index Units/mach Units/FRU Description Removal procedure 40X9983 Tray 2 transport roller 40X9984 Tray 2 transport sensor cable 40X8968 Sensor (tray 2 transport) 40X8968 Sensor (tray 2 paper feed) 40X9899 Tray 2 empty sensor actuator 40X8970 Feed roller 40X9981...
Page 575: Assembly 17: Tray 2 Separator
7421 Assembly 17: Tray 2 separator Parts catalog...
Page 576 7421 Assembly 17: Tray 2 separator Asm-index Units/mach Units/FRU Description Removal procedure 40X9455 Roller clutch 40X8970 Separator roller 40X9927 Separator roller assembly Parts catalog...
Page 577: Assembly 18: Tray Rail
7421 Assembly 18: Tray rail Parts catalog...
Page 578 7421 Assembly 18: Tray rail Asm-index Units/mach Units/FRU Description Removal procedure 40X8978 Rear right lift handle 40X8977 Front right lift handle 40X8982 Tray 1 insert rail 40X8982 Tray 2 insert rail 40X9305 Tray left rail guide wheel 40X8981 Tray right rail guide wheel 40X9989 Tray stopper 40X8979...
Page 579: Assembly 19: Tray Paper Detection
7421 Assembly 19: Tray paper detection Parts catalog...
Page 580 7421 Assembly 19: Tray paper detection Asm-index Units/mach Units/FRU Description Removal procedure 40X8988 Tray size sensing assembly 40X8984 Tray 1 feed cable 40X8987 Motor (tray 1 lift) 40X8869 Sensor (tray 1 near empty) 40X8989 Sensor (tray 1 paper width) 40X8987 Motor (tray 2 lift) 40X8869 Sensor (tray 2 near empty)
Page 581: Assembly 20: 500-Sheet Tray-Tray 1
7421 Assembly 20: 500-sheet tray—Tray 1 Parts catalog...
Page 582 7421 Assembly 20: 500-sheet tray—Tray 1 Asm-index Units/mach Units/FRU Description Removal procedure 40X9305 Tray insert guide wheel 40X8990 Tray 1 insert 40X9925 Pick roller 40X8970 Feed/separator roller Parts catalog...
Page 583: Assembly 21: 500-Sheet Tray-Tray 1 Or Tray 2
7421 Assembly 21: 500‑sheet tray—Tray 1 or Tray 2 Parts catalog...
Page 584 7421 Assembly 21: 500‑sheet tray—Tray 1 or Tray 2 Asm-index Units/mach Units/FRU Description Removal procedure 40X9308 Tray near empty sensor actuator 40X9306 Tray paper length guide Parts catalog...
Page 585: Assembly 22: 500-Sheet Tray-Tray 2
7421 Assembly 22: 500‑sheet tray—Tray 2 Parts catalog...
Page 586 7421 Assembly 22: 500‑sheet tray—Tray 2 Asm-index Units/mach Units/FRU Description Removal procedure 40X9305 Tray insert guide wheel 40X8992 Tray 2 insert 40X9925 Pick roller 40X8970 Feed/separator roller Parts catalog...
Page 587: Assembly 23: Registration Transport
7421 Assembly 23: Registration transport Parts catalog...
Page 588 7421 Assembly 23: Registration transport Asm-index Units/mach Units/FRU Description Removal procedure 40X8994 Registration transport assembly “Registration transport assembly” on page 282 40X9706 Registration primary gear 40X9707 Registration secondary gear 40X9009 Registration roller fixed power resistor -- 40X9007 Registration cable 40X8998 Toner density solenoid 40X8997 Sensor (registration humidity)
Page 589: Assembly 24: Transfer
7421 Assembly 24: Transfer Parts catalog...
Page 590 7421 Assembly 24: Transfer Asm-index Units/mach Units/FRU Description Removal procedure 40X9011 Registration unit assembly “Registration unit assembly removal” on page 314 40X9990 Fusing speed sensor cable -- 40X9009 Fuser fixed power resistor -- 40X8869 Sensor (fusing speed) “Sensor (fusing speed) removal” on page 40X9010 Transfer roller “Transfer roller removal”...
Page 591: Assembly 25: Registration Unit
7421 Assembly 25: Registration unit Parts catalog...
Page 592 7421 Assembly 25: Registration unit Asm-index Units/mach Units/FRU Description Removal procedure 40X9012 Registration unit gear “Registration unit gears removal” on page 320 40X9992 Registration unit lock “Registration unit lock removal” on page 40X9993 Registration unit lock shaft “Registration unit lock removal” on page 40X9994 Registration unit handle “Registration unit lock removal”...
Page 593: Assembly 26: Right Door Transport
7421 Assembly 26: Right door transport Parts catalog...
Page 594 7421 Assembly 26: Right door transport Asm-index Units/mach Units/FRU Description Removal procedure 40X9019 Right door upper lock “Right door lock removal” on page 295 40X9020 Right door switch actuator “Right door switch actuator removal” on page 312 40X9711 Right door handle 40X9713 Right door lower lock “Right door lock removal”...
Page 595: Assembly 27: Mpf 1
7421 Assembly 27: MPF 1 Parts catalog...
Page 596 7421 Assembly 27: MPF 1 Asm-index Units/mach Units/FRU Description Removal procedure 40X9027 “MPF removal” on page 297 40X9716 MPF lift plate sensor cable -- 40X9996 MPF lift plate cam 40X9995 MPF feed roller “MPF feed/separator assembly” on page 40X9719 MPF feed clutch gear “MPF gears removal”...
Page 597: Assembly 28: Mpf 2
7421 Assembly 28: MPF 2 Parts catalog...
Page 598 7421 Assembly 28: MPF 2 Asm-index Units/mach Units/FRU Description Removal procedure 40X8869 Sensor (MPF paper length 1) “Sensor (MPF paper length) removal” on page 299 40X9026 MPF paper length 1 sensor actuator -- 40X9026 MPF paper length 2 sensor actuator -- 40X8869 Sensor (MPF paper length 2) “Sensor (MPF paper length)
Page 599: Assembly 29: Duplex 1
7421 Assembly 29: Duplex 1 Parts catalog...
Page 600 7421 Assembly 29: Duplex 1 Asm-index Units/mach Units/FRU Description Removal procedure 40X9031 Duplex transport assembly “Duplex transport assembly removal” on page 285 40X9997 Right door cover 40X9998 Duplex transport jam “Duplex transport jam removal knob removal knob removal” on page 286 40X9012 Duplex transport gear “Duplex transport gears removal”...
Page 601: Assembly 30: Duplex 2
7421 Assembly 30: Duplex 2 Parts catalog...
Page 602 7421 Assembly 30: Duplex 2 Asm-index Units/mach Units/FRU Description Removal procedure 40X9723 Fuser exit sensor cable 40X8869 Sensor (fuser exit) “Sensor (fuser exit) removal” on page 40X9039 Fuser exit sensor actuator “Fuser exit sensor actuator removal” on page 288 40X9215 Redrive diverter gear 40X8869 Sensor (duplex pass through...
Page 603: Assembly 31: Fuser
7421 Assembly 31: Fuser Parts catalog...
Page 604 7421 Assembly 31: Fuser Asm-index Units/mach Units/FRU Description Removal procedure 40X9046 Fuser “Fuser removal” on page 279 40X9044 Induction heater, 100 V “Induction heater removal” on page 279 40X9045 Induction heater, 230 V “Induction heater removal” on page 279 40X9047 Sensor (fuser temperature) with cable 40X9041...
Page 605: Assembly 32: Exit 1
7421 Assembly 32: Exit 1 Parts catalog...
Page 606 7421 Assembly 32: Exit 1 Asm-index Units/mach Units/FRU Description Removal procedure 40X9167 Redrive exit guide 40X9313 Sensor (redrive exit) 40X9644 Redrive exit sensor cable 40X9714 Redrive exit sensor actuator -- 40X9042 HPT bin paper bail 40X9313 Sensor (exit) 40X9599 Exit sensor cable 40X9484 Exit sensor actuator 40X8974...
Page 607: Assembly 33: Exit 2
7421 Assembly 33: Exit 2 Parts catalog...
Page 608 7421 Assembly 33: Exit 2 Asm-index Units/mach Units/FRU Description Removal procedure 40X9159 Exit guide assembly 40X9161 Diverter solenoid Parts catalog...
Page 609: Assembly 34: Main And Feed Drive
7421 Assembly 34: Main and feed drive Parts catalog...
Page 610 7421 Assembly 34: Main and feed drive Asm-index Units/mach Units/FRU Description Removal procedure 40X9164 Main drive assembly “Main drive assembly removal” on page 379 40X9564 Motor (developer) “Motor (developer) removal” on page 40X9163 Motor (transport) “Motor (transport) removal” on page 40X9166 Duplex transport clutch “Duplex transport clutch removal”...
Page 611: Assembly 35: Toner Cartridge Drive
7421 Assembly 35: Toner cartridge drive Parts catalog...
Page 612 7421 Assembly 35: Toner cartridge drive Asm-index Units/mach Units/FRU Description Removal procedure 40X9223 Toner cartridge drive “Toner cartridge drive assembly removal” on assembly page 382 40X9179 Motor (toner cartridge) “Motor (toner cartridge) removal” on page 362 Parts catalog...
Page 613: Assembly 36: Fuser Drive 1
7421 Assembly 36: Fuser drive 1 Parts catalog...
Page 614 7421 Assembly 36: Fuser drive 1 Asm-index Units/mach Units/FRU Description Removal procedure 40X9177 Fuser drive gearbox “Fuser drive gearbox removal” on page 385 40X9729 Fuser pressure primary gear 40X9730 Fuser pressure secondary gear -- 40X9731 Fuser transport primary gear 40X9732 Fuser transport secondary gear -- Parts catalog...
Page 615: Assembly 37: Fuser Drive 2
7421 Assembly 37: Fuser drive 2 Parts catalog...
Page 616 7421 Assembly 37: Fuser drive 2 Asm-index Units/mach Units/FRU Description Removal procedure 40X9179 Motor (fuser pressure) “Motor (fuser pressure) removal” on page 358 40X9163 Motor (fuser) “Motor (fuser) removal” on page 384 40X9178 Fuser exit clutch Parts catalog...
Page 617: Assembly 38: Ozone Duct
7421 Assembly 38: Ozone duct Parts catalog...
Page 618 7421 Assembly 38: Ozone duct Asm-index Units/mach Units/FRU Description Removal procedure 40X9184 Exhaust filter 40X8859 Toner suction fan “Toner suction fan removal” on page 387 40X9183 Ozone filter 40X9185 Ozone fan “Ozone fan removal” on page 376 40X9182 Ozone fan with duct “Ozone fan removal”...
Page 619: Assembly 39: High Voltage
7421 Assembly 39: High voltage Parts catalog...
Page 620 7421 Assembly 39: High voltage Asm-index Units/mach Units/FRU Description Removal procedure 40X9189 Power‑saving board “Power‑saving board removal” on page 352 40X9198 Induction heater magnetic erase “Induction heater magnetic erase board board (IHMEB) removal” on page 348 40X8945 Fuser power supply fan “Fuser power supply fan removal”...
Page 621: Assembly 40: Main Power Supply
7421 Assembly 40: Main power supply Parts catalog...
Page 622 7421 Assembly 40: Main power supply Asm-index Units/mach Units/FRU Description Removal procedure 40X9203 Main power supply, 100 V “Main power supply removal” on page 40X9204 Main power supply, 230 V “Main power supply removal” on page 40X9205 Main power supply fan with “Main power supply fan removal”...
Page 623: Assembly 41: Electrical 1
7421 Assembly 41: Electrical 1 Parts catalog...
Page 624 7421 Assembly 41: Electrical 1 Asm-index Units/mach Units/FRU Description Removal procedure 40X9741 Power socket 40X9402 Power socket mount 40X9740 Power socket cable Parts catalog...
Page 625: Assembly 42: Electrical 2
7421 Assembly 42: Electrical 2 Parts catalog...
Page 626 7421 Assembly 42: Electrical 2 Asm-index Units/mach Units/FRU Description Removal procedure 40X9207 Engine controller board “Engine controller board removal” on page 353 40X9744 Engine controller board FFC -- 40X9210 ADF/scanner image “ADF/scanner image controller board controller board removal” on page 354 40X9663 Controller board (MFP) “Controller board removal”...
Page 627: Assembly 43: Adf Covers 1
7421 Assembly 43: ADF covers 1 Parts catalog...
Page 628 7421 Assembly 43: ADF covers 1 Asm-index Units/mach Units/FRU Description Removal procedure 40X8858 ADF rear cover “ADF rear cover removal” on page 410 40X8860 ADF controller board “ADF controller board removal” on page 396 40X8861 ADF right hinge “ADF right hinge removal” on page 409 40X8862 ADF frame 40X8863...
Page 629: Assembly 44: Adf Covers 2
7421 Assembly 44: ADF covers 2 Parts catalog...
Page 630 7421 Assembly 44: ADF covers 2 Asm-index Units/mach Units/FRU Description Removal procedure 40X8866 ADF cushion “ADF cushion removal” on page 396 Parts catalog...
Page 631: Assembly 45: Adf Cis 1
7421 Assembly 45: ADF CIS 1 Parts catalog...
Page 632 7421 Assembly 45: ADF CIS 1 Asm-index Units/mach Units/FRU Description Removal procedure 40X9216 ADF CIS assembly “ADF CIS assembly removal” on page 394 40X8865 ADF CIS data cable 40X9218 ADF CIS power supply cable 40X9696 ADF CIS power supply board cable -- 40X9217 ADF CIS power supply board “ADF CIS power supply board...
Page 633: Assembly 46: Adf Cis 2
7421 Assembly 46: ADF CIS 2 Parts catalog...
Page 634 7421 Assembly 46: ADF CIS 2 Asm-index Units/mach Units/FRU Description Removal procedure 40X9948 ADF CIS idler roller 40X9956 ADF CIS jam access latch 40X9955 ADF CIS jam access handle Parts catalog...
Page 635: Assembly 47: Adf Cis 3
7421 Assembly 47: ADF CIS 3 Parts catalog...
Page 636 7421 Assembly 47: ADF CIS 3 Asm-index Units/mach Units/FRU Description Removal procedure 40X9220 Motor (ADF CIS clean) “Motor (ADF CIS clean) removal” on page 431 40X9699 ADF CIS clean motor cable 40X9700 ADF CIS clean sensor cable 40X9691 ADF CIS clean belt 40X9701 ADF exit sensor cable 40X9959...
Page 637: Assembly 48: Adf Paper Feed
7421 Assembly 48: ADF paper feed Parts catalog...
Page 638 7421 Assembly 48: ADF paper feed Asm-index Units/mach Units/FRU Description Removal procedure 40X9940 ADF rear paper guide 40X9941 ADF tray “ADF tray removal” on page 414 40X9942 ADF front paper guide 40X8869 Sensor (ADF paper length 2) “Sensors (ADF tray section) removal”...
Page 639: Assembly 49: Adf Paper Pick 1
7421 Assembly 49: ADF paper pick 1 Parts catalog...
Page 640 7421 Assembly 49: ADF paper pick 1 Asm-index Units/mach Units/FRU Description Removal procedure 40X9946 ADF top cover “ADF top cover removal” on page 413 40X8875 ADF door latch 40X9947 ADF door frame Parts catalog...
Page 641: Assembly 50: Adf Paper Pick 2
7421 Assembly 50: ADF paper pick 2 Parts catalog...
Page 642 7421 Assembly 50: ADF paper pick 2 Asm-index Units/mach Units/FRU Description Removal procedure 40X9680 ADF top cover sensor cable 40X8869 Sensor (ADF document “Sensors (ADF top open cover section) separation) removal” on page 425 40X8869 Sensor (ADF registration) “Sensors (ADF top open cover section) removal”...
Page 643: Assembly 51: Adf Paper Pick 3
7421 Assembly 51: ADF paper pick 3 Parts catalog...
Page 644 7421 Assembly 51: ADF paper pick 3 Asm-index Units/mach Units/FRU Description Removal procedure 40X8878 ADF feed and pick roller “ADF feed and pick roller assembly assembly removal” on page 398 40X8879 ADF pick roller “ADF pick roller removal” on page 407 40X9681 ADF feed roller “ADF feed roller removal”...
Page 645: Assembly 52: Adf Paper Transport 1
7421 Assembly 52: ADF paper transport 1 Parts catalog...
Page 646 7421 Assembly 52: ADF paper transport 1 Asm-index Units/mach Units/FRU Description Removal procedure 40X8882 ADF separator pad “ADF separator pad removal” on page 412 40X9949 ADF registration guide “ADF registration guide removal” on page 410 40X9682 ADF separator roller “ADF separator roller removal” on page 412 Parts catalog...
Page 647: Assembly 53: Adf Paper Transport 2
7421 Assembly 53: ADF paper transport 2 Parts catalog...
Page 648 7421 Assembly 53: ADF paper transport 2 Asm-index Units/mach Units/FRU Description Removal procedure 40X9683 ADF feed motor cable 40X8884 Motor (ADF feed) “Motor (ADF feed) removal” on page 433 40X8885 ADF feed belt 40X9950 ADF feed gear 40X9951 ADF registration roller 40X8885 ADF registration belt 40X9952...
Page 649: Assembly 54: Adf Paper Transport 3
7421 Assembly 54: ADF paper transport 3 Parts catalog...
Page 650 7421 Assembly 54: ADF paper transport 3 Asm-index Units/mach Units/FRU Description Removal procedure 40X8889 Motor (ADF registration) “Motor (ADF registration) removal” on page 436 40X9684 ADF scan motor cable 40X9686 ADF scan roller 2 gear 40X8893 ADF scan roller 2 40X8891 ADF document exit roller -- 40X8892...
Page 651: Assembly 55: Adf Paper Transport 4
7421 Assembly 55: ADF paper transport 4 Parts catalog...
Page 652 7421 Assembly 55: ADF paper transport 4 Asm-index Units/mach Units/FRU Description Removal procedure 40X8896 Motor (ADF scan shaft “Motor (ADF scan shaft release) removal” release) on page 432 40X9689 ADF door open sensor cable 40X8869 Sensor (ADF top cover open) “Sensor (ADF top cover open) removal”...
Page 653: Assembly 56: Adf Paper Transport 5
7421 Assembly 56: ADF paper transport 5 Parts catalog...
Page 654 7421 Assembly 56: ADF paper transport 5 Asm-index Units/mach Units/FRU Description Removal procedure 40X9690 ADF scan sensor cable 40X9212 ADF exit sensor cable 40X8869 Sensor (ADF jam access cover) “Sensor (ADF jam access cover) removal” on page 416 40X8869 Sensor (ADF exit) 40X8869 Sensor (scan glass clean) “Sensor (scan glass clean) removal”...
Page 655: Assembly 57: Adf Paper Transport 6
7421 Assembly 57: ADF paper transport 6 Parts catalog...
Page 656 7421 Assembly 57: ADF paper transport 6 Asm-index Units/mach Units/FRU Description Removal procedure 40X9685 ADF transport gear 40X9953 ADF exit roller 40X9695 CIS glass clean motor cable 40X9691 ADF glass clean encoder belt -- 40X9213 Motor (CIS glass clean) “Motor (CIS glass clean) removal” on page 439 40X9214 CIS glass clean belt...
Page 657: Assembly 58: Flatbed Scanner Covers
7421 Assembly 58: Flatbed scanner covers Parts catalog...
Page 658 7421 Assembly 58: Flatbed scanner covers Asm-index Units/mach Units/FRU Description Removal procedure 40X8921 Scanner rear cover “Scanner rear cover removal” on page 430 40X8922 Scanner top cover “Scanner top cover removal” on page 430 40X8923 Scanner right cover “Scanner right cover removal” on page 40X8924 Screw hole cover 40X8925...
Page 659: Assembly 59: Flatbed Scanner 1
7421 Assembly 59: Flatbed scanner 1 Parts catalog...
Page 660 7421 Assembly 59: Flatbed scanner 1 Asm-index Units/mach Units/FRU Description Removal procedure 40X8933 ADF duplex scan glass “ADF duplex scan glass removal” on page 396 40X8928 Scanner glass “Scanner glass removal” on page 428 40X9702 Scanner sensor cable 40X8932 Sensor (scanner paper “Sensor (scanner paper length 1) removal”...
Page 661: Assembly 60: Flatbed Scanner 2
7421 Assembly 60: Flatbed scanner 2 Parts catalog...
Page 662 7421 Assembly 60: Flatbed scanner 2 Asm-index Units/mach Units/FRU Description Removal procedure 40X8939 Scanner lamp cable 40X8938 Scanner lamp 40X8937 Scanner CCD lens assembly “Scanner CCD lens assembly removal” on page 426 40X8935 Scanner CCD cable Parts catalog...
Page 663: Assembly 61: Flatbed Scanner 3
7421 Assembly 61: Flatbed scanner 3 Parts catalog...
Page 664 7421 Assembly 61: Flatbed scanner 3 Asm-index Units/mach Units/FRU Description Removal procedure 40X9975 Scanner drive motor cable -- 40X8940 Motor (scanner drive) “Motor (scanner drive) removal” on page 40X8941 Scanner carriage belt 40X8942 Scanner carriage gear 40X9976 Scanner mirror Parts catalog...
Page 665: Assembly 62: 2 X 500-Sheet Tray-Covers
7421 Assembly 62: 2 x 500‑sheet tray—Covers Parts catalog...
Page 666 7421 Assembly 62: 2 x 500‑sheet tray—Covers Asm-index Units/opt Units/FRU Description Removal procedure 40X9779 2 x 500-sheet tray rear right “2 x 500-sheet tray rear right cover cover removal” on page 489 40X9285 2 x 500-sheet tray bottom right “2 x 500-sheet tray bottom right cover cover removal”...
Page 667: Assembly 63: 2 X 500-Sheet Tray-Frame
7421 Assembly 63: 2 x 500‑sheet tray—Frame Parts catalog...
Page 668 7421 Assembly 63: 2 x 500‑sheet tray—Frame Asm-index Units/opt Units/FRU Description Removal procedure 40X8981 2 x 500-sheet tray right rail guide wheel -- ‑‑ 40X9014 2 x 500-sheet tray insert stopper 40X9305 2 x 500-sheet tray left rail guide wheel 40X9290 2 x 500-sheet tray controller board “2 x 500-sheet tray controller...
Page 669: Assembly 64: 2 X 500-Sheet Tray-Paper Feed
7421 Assembly 64: 2 x 500‑sheet tray—Paper feed Parts catalog...
Page 670 7421 Assembly 64: 2 x 500‑sheet tray—Paper feed Asm-index Units/opt Units/FRU Description Removal procedure 40X9294 2 x 500-sheet tray feed and “2 x 500-sheet tray 3 transport belts and gears transport motor belt removal” on page 495 “2 x 500-sheet tray 4 transport belts and gears removal”...
Page 671: Assembly 65: 2 X 500-Sheet Tray-Paper Size Detection
7421 Assembly 65: 2 x 500‑sheet tray—Paper size detection Parts catalog...
Page 672 7421 Assembly 65: 2 x 500‑sheet tray—Paper size detection Asm-index Units/opt Units/FRU Description Removal procedure 40X8987 Motor (2 x 500-sheet tray 3 lift) “Motor (2 x 500-sheet tray lift) removal” on page 483 40X8869 Sensor (2 x 500-sheet tray 3 near “Sensor (2 x 500-sheet tray near empty) empty) removal”...
Page 673: Assembly 66: 2 X 500-Sheet Tray-Paper Transport
7421 Assembly 66: 2 x 500‑sheet tray—Paper transport Parts catalog...
Page 674 7421 Assembly 66: 2 x 500‑sheet tray—Paper transport Asm-index Units/opt Units/FRU Description Removal procedure 40X9908 2 x 500-sheet tray jam access door strap 40X8973 Transport idler roller Parts catalog...
Page 675: Assembly 67: 2 X 500-Sheet Tray-Paper Pick 1
7421 Assembly 67: 2 x 500‑sheet tray—Paper pick 1 Parts catalog...
Page 676 7421 Assembly 67: 2 x 500‑sheet tray—Paper pick 1 Asm-index Units/opt Units/FRU Description Removal procedure 40X9313 Sensor (2 x 500-sheet tray jam access door) “Sensor (2 x 500-sheet tray jam access door) removal” on page 473 40X9892 2 x 500-sheet tray transport gear spring 40X9893 2 x 500-sheet tray transport gear bushing 40X9894...
Page 677: Assembly 68: 2 X 500-Sheet Tray-Paper Pick 2
7421 Assembly 68: 2 x 500‑sheet tray—Paper pick 2 Parts catalog...
Page 678 7421 Assembly 68: 2 x 500‑sheet tray—Paper pick 2 Asm-index Units/opt Units/FRU Description Removal procedure 40X8968 Sensor (2 x 500-sheet tray “Sensor (2 x 500-sheet tray transport) transport) removal” on page 494 40X8968 Sensor (2 x 500-sheet tray feed) “2 x 500-sheet tray transport assembly sensors removal”...
Page 679: Assembly 69: 2 X 500-Sheet Tray-Paper Pick 3
7421 Assembly 69: 2 x 500‑sheet tray—Paper pick 3 Parts catalog...
Page 680 7421 Assembly 69: 2 x 500‑sheet tray—Paper pick 3 Asm-index Units/opt Units/FRU Description Removal procedure 40X9455 Separator clutch 40X8970 Separator roller “2 x 500-sheet tray rollers removal” on page 479 Parts catalog...
Page 681: Assembly 70: 2 X 500-Sheet Tray-Tray 3
7421 Assembly 70: 2 x 500‑sheet tray—Tray 3 Parts catalog...
Page 682 7421 Assembly 70: 2 x 500‑sheet tray—Tray 3 Asm-index Units/opt Units/FRU Description Removal procedure ‑‑ 40X9635 Tray 3 insert 40X9304 Tray lock lever “Tray lock removal” on page 477 40X9017 Tray 3 right front cover 40X9034 Tray 3 handle cover 40X9186 Tray handle 40X8871...
Page 683: Assembly 71: 2 X 500-Sheet Tray-Tray 4
7421 Assembly 71: 2 x 500‑sheet tray—Tray 4 Parts catalog...
Page 684 7421 Assembly 71: 2 x 500‑sheet tray—Tray 4 Asm-index Units/opt Units/FRU Description Removal procedure ‑‑ 40X9697 Tray 4 insert 40X9304 Tray lock lever “Tray lock removal” on page 477 40X9033 Tray 4 right front cover 40X9320 Tray 4 handle cover 40X9186 Tray handle 40X9028...
Page 685: Assembly 72: 2 X 500-Sheet Tray-Tray 3 Or Tray 4 Frame
7421 Assembly 72: 2 x 500‑sheet tray—Tray 3 or Tray 4 frame Parts catalog...
Page 686 7421 Assembly 72: 2 x 500‑sheet tray—Tray 3 or Tray 4 frame Asm-index Units/opt Units/FRU Description Removal procedure 40X9308 2 x 500-sheet tray near empty sensor actuator 40X9306 Tray insert paper length guide “Tray insert paper length guide removal” on page 475 40X9309 2 x 500-tray insert paper length sensor actuator...
Page 687: Assembly 73: 3000-Sheet Tray-Covers
7421 Assembly 73: 3000‑sheet tray—Covers Parts catalog...
Page 688 7421 Assembly 73: 3000‑sheet tray—Covers Asm-index Units/opt Units/FRU Description Removal procedure 40X9260 3000-sheet tray top door “3000-sheet tray door removal” on page 507 40X9255 3000-sheet tray right cover “3000-sheet tray right cover removal” on page 505 40X8903 3000-sheet tray empty LED “3000-sheet tray empty LED removal”...
Page 689: Assembly 74: 3000-Sheet Tray-Frame 1
7421 Assembly 74: 3000‑sheet tray—Frame 1 Parts catalog...
Page 690 7421 Assembly 74: 3000‑sheet tray—Frame 1 Asm-index Units/opt Units/FRU Description Removal procedure 40X9279 3000-sheet tray caster wheel “3000-sheet tray caster wheel removal” on page 502 Parts catalog...
Page 691: Assembly 75: 3000-Sheet Tray-Frame 2
7421 Assembly 75: 3000‑sheet tray—Frame 2 Parts catalog...
Page 692 7421 Assembly 75: 3000‑sheet tray—Frame 2 Asm-index Units/opt Units/FRU Description Removal procedure 40X9261 Dehumidifier “Dehumidifier removal” on page 509 Parts catalog...
Page 693: Assembly 76: 3000-Sheet Tray-Elevator Front Section
7421 Assembly 76: 3000‑sheet tray—Elevator front section Parts catalog...
Page 694 7421 Assembly 76: 3000‑sheet tray—Elevator front section Asm-index Units/opt Units/FRU Description Removal procedure 40X9275 3000-sheet tray release “3000-sheet tray release handle removal” on handle page 503 40X9276 3000-sheet tray elevator “3000-sheet tray elevator spring removal” on spring page 513 Parts catalog...
Page 695: Assembly 77: 3000-Sheet Tray-Paper Feed 1
7421 Assembly 77: 3000‑sheet tray—Paper feed 1 Parts catalog...
Page 696 7421 Assembly 77: 3000‑sheet tray—Paper feed 1 Asm-index Units/opt Units/FRU Description Removal procedure 40X9886 3000-sheet tray feed and “3000-sheet tray pick roller assembly pick drive gear removal” on page 523 40X9267 Feed and pick roller “3000-sheet tray rollers removal” on page 498 40X9881 3000-sheet tray empty...
Page 697: Assembly 78: 3000-Sheet Tray-Paper Feed 2
7421 Assembly 78: 3000‑sheet tray—Paper feed 2 Parts catalog...
Page 698 7421 Assembly 78: 3000‑sheet tray—Paper feed 2 Asm-index Units/opt Units/FRU Description Removal procedure 40X9880 Sensor (3000-sheet tray “Sensor (3000-sheet tray elevator level) elevator level) removal” on page 511 40X9880 Sensor (3000-sheet tray “Sensor (3000-sheet tray empty) removal” empty) on page 510 40X9267 3000-sheet tray separator “3000-sheet tray feed roller assembly...
Page 699: Assembly 79: 3000-Sheet Tray-Paper Transport
7421 Assembly 79: 3000‑sheet tray—Paper transport Parts catalog...
Page 700 7421 Assembly 79: 3000‑sheet tray—Paper transport Asm-index Units/opt Units/FRU Description Removal procedure 40X9273 3000-sheet tray transport “3000-sheet tray feed roller assembly roller removal” on page 520 40X9885 Sensor (3000-sheet tray feed) “Sensor (3000-sheet tray feed) removal” on page 512 40X9771 3000-sheet tray transport “3000-sheet tray feed roller assembly idler roller...
Page 701: Assembly 80: 3000-Sheet Tray-Elevator Rear Section
7421 Assembly 80: 3000‑sheet tray—Elevator rear section Parts catalog...
Page 702 7421 Assembly 80: 3000‑sheet tray—Elevator rear section Asm-index Units/opt Units/FRU Description Removal procedure 40X9277 3000-sheet tray elevator release spring Parts catalog...
Page 703: Assembly 81: 3000-Sheet Tray-Drive Section
7421 Assembly 81: 3000‑sheet tray—Drive section Parts catalog...
Page 704 7421 Assembly 81: 3000‑sheet tray—Drive section Asm-index Units/opt Units/FRU Description Removal procedure 40X9262 3000-sheet tray controller “3000-sheet tray controller board removal” board on page 513 40X9266 3000‑sheet tray door switch “3000-sheet tray door switch removal” on page 514 40X9880 Sensor (3000-sheet tray near “Sensor (3000-sheet tray near empty) empty 1) removal”...
Page 705: Assembly 82: 3000-Sheet Tray-Wiring
7421 Assembly 82: 3000‑sheet tray—Wiring Asm-index Units/opt Units/FRU Description Removal procedure 40X9202 3000-sheet tray controller board cable 40X9698 3000-sheet tray interface cable Parts catalog...
Page 706 7421 Parts catalog...
Page 707: Assembly 83: 2500-Sheet Tray Covers
7421 Assembly 83: 2500-sheet tray covers Parts catalog...
Page 708 7421 Assembly 83: 2500-sheet tray covers Asm-index Units/opt Units/FRU Description Removal procedure 40X9280 2500-sheet tray rear cover “2500-sheet tray rear cover removal” on page 446 40X9779 2500-sheet tray rear right “2500-sheet tray rear right cover removal” on cover page 447 40X9285 2500-sheet tray bottom “2500-sheet tray lower right cover removal”...
Page 709: Assembly 84: 2500-Sheet Tray Frame
7421 Assembly 84: 2500-sheet tray frame Parts catalog...
Page 710 7421 Assembly 84: 2500-sheet tray frame Asm-index Units/opt Units/FRU Description Removal procedure 40X8869 Sensor (2500-sheet tray set) “Sensor (2500-sheet tray set) removal” on page 471 40X8981 Tray rail guide wheel 40X9784 Tray insert guide wheel 40X9785 2500-sheet tray controller board “2500-sheet tray controller board removal”...
Page 711: Assembly 85: 2500-Sheet Tray Paper Feed
7421 Assembly 85: 2500-sheet tray paper feed Parts catalog...
Page 712 7421 Assembly 85: 2500-sheet tray paper feed Asm-index Units/opt Units/FRU Description Removal procedure 40X9293 Motor (2500-sheet tray feed) “Motor (2500‑sheet tray feed) removal” on page 461 40X9293 Motor (2500-sheet tray transport) “Motor (2500‑sheet tray transport) removal” on page 462 40X9294 2500-sheet tray feed and transport motor belt 40X9891...
Page 713: Assembly 86: 2500-Sheet Tray Paper Transport
7421 Assembly 86: 2500-sheet tray paper transport Parts catalog...
Page 714 7421 Assembly 86: 2500-sheet tray paper transport Asm-index Units/opt Units/FRU Description Removal procedure 40X9908 2500-sheet tray jam access door “2500-sheet tray jam access door strap strap removal” on page 455 40X8973 Transport idler roller Parts catalog...
Page 715: Assembly 87: 2500-Sheet Tray Paper Pick 1
7421 Assembly 87: 2500-sheet tray paper pick 1 Parts catalog...
Page 716 7421 Assembly 87: 2500-sheet tray paper pick 1 Asm-index Units/opt Units/FRU Description Removal procedure 40X9298 2500-sheet tray transport gear 40X9892 2500-sheet tray transport gear spring 40X9893 2500-sheet tray transport gear bushing 40X9313 Sensor (2500-sheet tray jam access door) “Sensor (2500‑sheet tray jam access door) removal”...
Page 717: Assembly 88: 2500-Sheet Tray Paper Pick 2
7421 Assembly 88: 2500-sheet tray paper pick 2 Parts catalog...
Page 718 7421 Assembly 88: 2500-sheet tray paper pick 2 Asm-index Units/opt Units/FRU Description Removal procedure 40X9299 2500-sheet tray transport roller “2500‑sheet tray transport roller removal” on page 453 40X8968 Sensor (2500-sheet tray feed) “Sensor (2500‑sheet tray feed) removal” on page 468 40X8968 Sensor (2500-sheet tray transport) “Sensor (2500‑sheet tray transport)
Page 719: Assembly 89: 2500-Sheet Tray Paper Pick 3
7421 Assembly 89: 2500-sheet tray paper pick 3 Parts catalog...
Page 720 7421 Assembly 89: 2500-sheet tray paper pick 3 Asm-index Units/opt Units/FRU Description Removal procedure 40X9455 Separator clutch 40X8970 Separator roller Parts catalog...
Page 721: Assembly 90: 2500-Sheet Tray Insert 1
7421 Assembly 90: 2500-sheet tray insert 1 Parts catalog...
Page 722 7421 Assembly 90: 2500-sheet tray insert 1 Asm-index Units/opt Units/FRU Description Removal procedure 40X9602 2500-sheet tray insert (LTR) 40X9576 2500-sheet tray insert (A4) 40X9789 2500-sheet tray front cover 40X9339 2500-sheet tray right front cover 40X9320 2500-sheet tray handle cover 40X9186 2500-sheet tray handle 40X9788 2500-sheet tray lock lever...
Page 723: Assembly 91: 2500-Sheet Tray Insert 2
7421 Assembly 91: 2500-sheet tray insert 2 Parts catalog...
Page 724 7421 Assembly 91: 2500-sheet tray insert 2 Asm-index Units/opt Units/FRU Description Removal procedure 40X9794 Paper stack transfer sensor actuator spring 40X8869 Sensor (main tray near empty) “Sensor (2500‑sheet tray main tray near empty) removal” on page 466 40X9792 Paper stack transfer guide “2500-sheet tray paper stack transfer guide removal”...
Page 725: Assembly 92: 2500-Sheet Tray Insert 3
7421 Assembly 92: 2500-sheet tray insert 3 Parts catalog...
Page 726 7421 Assembly 92: 2500-sheet tray insert 3 Asm-index Units/opt Units/FRU Description Removal procedure 40X9796 Transfer guide primary gear 40X9798 Main tray elevator coupling 40X9901 Main tray elevator gear spring 40X9902 Main tray elevator gear 40X9797 Transfer guide primary gear spring 40X9795 Transfer guide secondary gear Parts catalog...
Page 727: Assembly 93: 2500-Sheet Tray Insert 4
7421 Assembly 93: 2500-sheet tray insert 4 Parts catalog...
Page 728 7421 Assembly 93: 2500-sheet tray insert 4 Asm-index Units/opt Units/FRU Description Removal procedure 40X9802 2500-sheet tray main tray empty “2500‑sheet tray main tray empty sensor bottom actuator sensor bottom actuator removal” on page 448 40X9801 2500-sheet tray elevator home “2500‑sheet tray elevator home sensor sensor actuator actuator removal”...
Page 729: Assembly 94: Maintenance Kits
7421 Assembly 94: Maintenance kits Asm-index Units/mach Units/FRU Description Removal procedure ‑‑ 40X9669 Maintenance kit, 300K includes: • Pick roller • Feed/separator roller • Transfer belt maintenance kit ‑‑ 40X9672 Maintenance kit, 200K (ADF) includes: • ADF pick roller • ADF feed roller •...
Page 730 7421 Parts catalog...
Page 731: Assembly 95: Power Cords
7421 Assembly 95: Power cords Asm-index Units/mach Units/FRU Description Removal procedure ‑‑ 40X7104 Power cord, 2.5 m (right‑angled)—USA, Canada, Latin America ‑‑ 40X0288 Power cord, 2.5 m (straight)—Argentina ‑‑ 40X1766 Power cord, 2.5 m (straight)—Bolivia, Peru ‑‑ 40X0273 Power cord, 2.5 m (straight)—Italy, Chile, Uruguay ‑‑...
Page 732 7421 Parts catalog...
Page 733: Assembly 96: Miscellaneous
7421 Assembly 96: Miscellaneous Asm-index Units/mach Units/FRU Description Removal procedure ‑‑ 41X0010 Forms and Bar Code Card ‑‑ 41X0012 IPDS card ‑‑ 41X0011 PRESCRIBE card ‑‑ 41X0030 Keyboard kit, English ‑‑ 41X0031 Keyboard kit, French ‑‑ 41X0032 Keyboard kit, Italian ‑‑...
Page 734 7421...
Page 735: Appendix A: Printer Specifications
Note: Some models may not apply to your product. Mode Description Power consumption (Watts) Printing The product is generating hard‑copy output from electronic inputs. One‑sided: 865 (MX910de), 925 (MX911de, MX911dte),985 (MX912de, MX912dxe); Two‑sided: 790 (MX910de), 850 (MX911de, MX911dte), 890 (MX912de, MX912dxe) Copy The product is generating hard‑copy output from hard‑copy...
Page 736: Off Mode
7421 The Hibernate mode can be entered in any of the following methods: • Using the Hibernate Timeout • Using the Schedule Power modes • Using the Sleep/Hibernate button Factory default Hibernate Timeout for this product in all countries or regions—3 days The amount of time the printer waits after a job is printed before it enters Hibernate mode can be modified between one hour and one month.
Page 737: Noise Emission Levels
Mode 1‑meter average sound pressure, dBA Printing One‑sided: 52 (MX910de), 53 (MX911de, MX911dte), 55 (MX912de, MX912dxe); Two‑sided: 55 (MX910de, MX911de, MX911dte), 56 (MX912de, MX912dxe) Scanning 57 (MX910de); 56 (MX911de, MX911dte, MX912de, MX912dxe) Copying 53 (MX910de); 54 (MX911de, MX911dte); 55 (MX911de, MX911dte) Ready 29 (MX910de);...
Page 738 7421...
Page 739: Appendix B: Options And Features
Firmware cards – Forms and Bar Code – PRESCRIBE – IPDS • Lexmark Internal Solutions Ports (ISP) – Standard 10/100/1000 Ethernet – MarkNet N8350 802.11 b/g/n wireless print server – MarkNet N8352 802.11 b/g/n wireless print server Media handling options Some options may not be available for all models.
Page 740 7421...
Page 741: Appendix C: Theory Of Operation
7421 Appendix C: Theory of operation POR sequence At power on, the engine code goes through a series of tests to verify hardware integrity. If a hardware failure is detected, then it is reported to the printer. If the POR sequence cannot be completed successfully, then the printer may post an error message identifying that service may be needed.
Page 742: Charge
7421 Charge A uniform negative electrical charge is applied to the surface of the photoconductor roller. The photoconductive properties of the surface material allow it to hold the charge as long as it is not exposed to light. Part Photoconductor roller Charge source Expose The printhead emits the light that hits the surface of the photoconductor.
Page 743: First Transfer
7421 Part Photoconductor roller Developer First transfer The image transfers from the photoconductor roller to the transfer belt. Due to relative opposite polarities, the transfer belt pressed against the photoconductor roller attracts the toner onto its surface. Appendix C: Theory of operation...
Page 744: Clean (Photoconductor)
7421 Part Transfer belt Photoconductor roller Clean (photoconductor) The erase LED emits light that neutralizes the remaining charge on the photoconductor surface. As a result, the toner loosens or separates from the photoconductor. Then, a cleaning blade scrapes off the remaining toner. The cycle (charge, expose, develop, first transfer, clean) repeats until the whole image is transferred to the transfer belt.
Page 745: Second Transfer
7421 Part Erase LED Cleaning blade Photoconductor roller Second transfer The whole image from the transfer belt is transferred again, this time onto the paper. The paper, which is pressed between the transfer belt and transfer roller, attracts the toner to its surface. As the paper moves up, a separator guide prevents it from entering the top side of the transfer belt.
Page 746: Fuse
7421 Part Transfer belt Cleaning blade Fuse Even if the toner image is already on the paper, the toner particles are not yet permanently bonded to the surface. For the final part of printing, the paper is transported to the fuser where heat and pressure are applied to it. As a result, the toner particles melt and permanently fuse with the paper, completing the print process.
Page 747 7421 Part Pressure roller Transfer roller Transfer belt Heat roller Appendix C: Theory of operation...
Page 748: Printer Operation
7421 Printer operation Printer paper path Part Duplex section Registration section MPF section Tray section Print section Exit section Tray section Paper presence and size detection The sensor (tray empty) detects if there is no paper in the tray. The positions of the guides determine the dimensions of the paper.
Page 749 7421 Part Sensor (tray paper width) Sensor (tray paper length) Tray insert paper width guides Sensor (tray empty) Tray insert paper length guide Paper lift During feed, the lift plate raises the paper until the paper comes into contact with the pick roller. The sensor (lift plate level) detects if the pick roller is sufficiently engaged with the paper.
Page 750 7421 Part Motor (lift) Sensor (near empty) Actuator Sensor (lift plate level) Pick roller Lift plate Paper Paper feed The pick roller pushes the topmost sheet to the feed roller. The separator roller makes sure that only one sheet is fed at a time.
Page 751: Mpf Section
7421 Part Sensor (pass through) Sensor (paper feed) Feed roller Separator roller Pick roller MPF section Paper presence detection The sensor (MPF empty) detects if there is no paper in the tray. Paper lift During feed, the lift plate pushes up to engage the paper with the pick roller. The movement of the lift plate is controlled by the MPF pick solenoid and is detected by the sensor (MPF lift plate position).
Page 752 7421 Part MPF pick roller Lift plate MPF pick solenoid Sensor (MPF lift plate position) Paper feed The MPF pick assembly moves the paper from the MPF tray to the registration section. Part MPF pick assembly MPF tray Appendix C: Theory of operation...
Page 753: 2500-Sheet Tray Section
7421 2500‑sheet tray section Paper path Part Paper feed from main tray Main tray Paper transfer movement from reserve tray to main tray Reserve tray Paper feed mechanism When the drawer is inserted, the lever is triggered to lower the pick roller. The motor (2500-sheet tray elevator) drives and raises the main tray until the paper is engaged with the pick roller.
Page 754 7421 Part Shifter stop detection actuator Lower limit detection actuator Transfer guide stop lever Sensor (2500-sheet tray elevator home) Main tray Near empty detection actuator Motor (2500-sheet tray elevator) Sensor (2500-sheet tray main tray near empty) Appendix C: Theory of operation...
Page 755 7421 Part Paper feed section Motor (2500-sheet tray feed) Motor (2500-sheet tray transport) Sensor (2500-sheet tray main tray elevator limit) Pick roller Feed roller Transport roller Sensor (2500-sheet tray transport) Separator roller Sensor (2500-sheet tray main tray paper empty, top) Lever The main tray continues to move up as the amount of paper decreases.
Page 756: 3000-Sheet Tray Section
7421 If the reserve tray is empty when paper on the main tray runs out, then the main tray is not lowered. The main tray lowers only when the drawer is removed. Part Sensor (2500-sheet tray reserve tray paper limit) Motor (2500-sheet tray transfer guide) Sensor (2500-sheet tray elevator home) Sensor (2500-sheet tray transfer guide home)
Page 757 7421 Part Paper Sensor (tray empty) Actuator position (with paper) Actuator position (without paper) Paper lift During feed, the elevator plate raises the paper until the paper comes into contact with the pick roller. The sensor (elevator level) detects if the pick roller is sufficiently engaged with the paper. The motor (elevator) controls the movement of the elevator plate.
Page 758 7421 Part Sensor (elevator level) Pick roller Elevator plate Paper feed and transport The pick roller pushes the topmost sheet to the feed roller. The separator roller makes sure that only one sheet is fed at a time. The paper is fed from the pick assembly to the transport rollers before going to the registration section. For more information, see “Registration section”...
Page 759: Registration Section
7421 Part Tray 2 transport roller Registration section Registration section Depending on the print job, the registration section receives paper from the tray, MPF, or duplex section. As paper enters the registration roller, the sensor (registration) detects its presence. Skew adjustments are made on the registration roller to align the leading edge of the paper.
Page 760: Print Section
7421 Print section Toner from the transfer belt is transferred to the paper. For more information, see “Second transfer” on page 745. The rotation of the transfer belt and transfer roller is controlled by the motor (developer). Part Motor (developer) Fuser Transfer roller Transfer belt...
Page 761: Exit Section
7421 Part Fuser Transfer roller Transfer belt Motor (fuser) Motor (fuser pressure) Exit section Exit roller path Paper moves from the fuser to the exit roller. The motor (fuser) drives the exit roller to push out the printed paper to the standard bin.
Page 762 7421 Part Motor (fuser) Fuser Exit roller Redrive roller path If a paper transport is on the printer during a standard print job, then paper exits on top of the paper transport. As paper moves up from the fuser, the diverter closes the path to the exit roller and opens the path to the redrive roller. The motor (redrive) controls the redrive roller, which exits the printed paper.
Page 763: Duplex Section
7421 Part Motor (redrive) Redrive roller Diverter Fuser Duplex section Upper duplex transport For a duplex print job, the paper is fed back to print on the other side. The redrive roller, which is driven by the motor (redrive), reverses rotation to feed the paper back to the printer. The path to the fuser section is closed by the diverter so that the paper moves along the duplex path.
Page 764 7421 Part Motor (redrive) Duplex entrance roller Sensor (duplex pass through 1) Upper duplex transport roller Diverter Lower duplex transport The paper continues to move down to the lower duplex transport roller and duplex exit roller. Appendix C: Theory of operation...
Page 765: Adf Operation
7421 The sensor (duplex pass through 2) detects the position of the paper. The motor (transport) drives the lower duplex transport roller and duplex exit roller. The paper then travels to the registration section to print on the other side. For more information, see “Registration section”...
Page 766: Adf Document Feed Section
7421 Section ADF document registration section ADF document feed section ADF document exit section ADF document reading section ADF document feed section Part ADF feed roller ADF separator roller ADF pick roller Sensor (ADF paper empty) Sensor (ADF paper length 2) ADF paper length actuator 1 Sensor (ADF paper length 1) Sensor (ADF paper width)
Page 767: Adf Document Registration Section
7421 The document is transported into the document registration section by the ADF pick roller and ADF feed roller after the feeding sequence. ADF document registration section Part Sensor (ADF registration) Motor (ADF registration) ADF registration roller When the document exits the document feed section, the motor (ADF registration) drives the ADF registration roller to receive the document.
Page 768 7421 Part CIS assembly ADF scan roller 2 Sensor (ADF scan) ADF scan roller 1 ADF scan idle roll The motor (ADF scan) drives the ADF scan rollers 1, 2, and 3 to transport the document into the document scanning section.
Page 769: Adf Document Exit Section
7421 ADF document exit section Part Motor (ADF scan) CIS assembly ADF scan roller 3 Sensor (ADF exit) ADF exit roller The motor (ADF scan) drives the ADF scan roller 3 and ADF exit roller to feed the document out of the document reading section and into the bin.
Page 770: Flatbed Scanning
7421 Part Sensor (scanner media length 1) Sensor (scanner media length 2) Motor (scanner drive) Sensor (ADF open) Scanner CCD lens assembly Scanner lamp Flatbed scanning Part Scanner home position Document size detection position Scan start position Scanner lamp Trailing edge of the image The motor (scanner drive) drives the scanner lamp to move to the home position when the printer is turned on.
Page 771: Appendix D: Acronyms
7421 Appendix D: Acronyms Acronyms ASIC Application-specific integrated circuit BLDC Brushless DC motor Black only retract Cyan Charge coupled device Carbonless copy paper Cyclic redundancy check Customer setup CTLS Capacitance toner level sensing DIMM Dual inline memory module DRAM Dynamic random access memory Enhanced data out Electrophotography EPROM...
Page 772 7421 MROM Masked read only memory Microswitch Nonvolatile memory NVRAM Nonvolatile random access memory Original equipment manufacturer Optical sensor Photoconductor pel, pixel Picture element Power-on reset POST Power-on self test Position sensing device Pulse width modulation Raster imaging processor Read only memory SDRAM Synchronous dual random access memory SIMM...
Page 773: Index
7421 Index Numerics 163.04 error acronyms 771 2500-sheet tray paper feed failure service check 158 ADF scanner theory 167.04 error ADF document exit section 769 2500-sheet tray transport failure service check 159 ADF document feed section 766 189.xx errors ADF document registration section 767 2500-sheet tray communication error service ADF document scanning section 767 check 166...
Page 774 7421 Change [paper source] to [paper type] [paper size] load print quality pages 229 [orientation] 120 require standby 234 change history 27 reset maintenance counter 229 charge 742 restore settings 236 charger safe mode 231 cleaning 537 scanner manual registration 233 clean, photoconductor 744 size sensing 230 clean, transfer belt 745...
Page 775 7421 menu settings page 226 121 error messages 148 output bin feed tests 217 133 error messages 153 panel test 215 136 error messages 153 parallel strobe adjustment 225 153 error messages 156 permanent page count 224 163 error messages 157 print log 226 164 error messages 157 print log summary 227...
Page 776 7421 input tray tests feed tests 217 fax error log codes 199 Insert hole punch box 122 fax issue, escalating 203 Insert Tray [x] 123 Fax memory full 121 inspection guide 533 Fax partition inoperative. Contact system Insufficient memory for Flash Memory Defragment administrator.
Page 777 7421 Load Multipurpose Feeder with [paper type] [paper output bin tests size] [paper orientation] 125 feed tests 217 Load staples 125 Load staples [G11, G12] 126 loading letterhead paper paper orientation 32 characteristics 33 low insertion force (LIF) connector 257 letterhead 34 lubrication preprinted forms 34...
Page 778 7421 shadow images 52 Error reading USB drive. Remove USB. 121 skewed print 54 Error reading USB hub. Remove hub. 121 solid black pages 50 Fax memory full 121 streaked vertical lines appear on prints 55 Fax partition inoperative. Contact system toner smear 57 administrator.
Page 779 7421 Paper changes needed 127 Supply needed to complete job 132 Parallel port [x] disabled [56] 127 The device is operating in safe mode. Some print Photoconductor low [84.xy] 127 options may be disabled or provide unexpected Photoconductor very low [84.xy] 127 results.
Page 780 7421 2 x 500-sheet tray controller board 487 3000-sheet tray rollers 498 2 x 500-sheet tray empty LED 482 3000-sheet tray set sensor actuator 515 2 x 500-sheet tray empty LED cover 481 ADF assembly 391 2 x 500-sheet tray empty LED mount 482 ADF CIS assembly 394 2 x 500-sheet tray empty sensor actuator 492 ADF CIS power supply board 396...
Page 781 7421 fax card 357 motor (transport) 367 feed drive assembly 375 motor (tray 2 transport) 374 front inner cover 328 motor bracket 519 fuser 279 MPF 297 fuser drive gearbox 385 MPF empty actuator 309 fuser exit sensor actuator 288 MPF feed clutch 300 Fuser power supply fan 361 MPF feed/separator assembly 306...
Page 782 7421 sensor (2 x 500-sheet tray empty) 492 sensor (transfer guide home) 470 sensor (2 x 500-sheet tray feed) 492 sensor (tray 1 and 2 paper temperature) 376 sensor (2 x 500-sheet tray jam access door) 473 speaker cover 338 sensor (2 x 500-sheet tray lift plate level) 492 speaker removal 340 sensor (2500-sheet tray set) 471...
Page 783 7421 menu settings page 226, 230 809 service error messages 192 reset maintenance counter 212 816–824 service error messages 193 reset separator roll and pick assembly counter 212 850–891 service error messages 193 Restore held jobs? 131 network service check 140 restoring service engineer (SE) menu 238 configuration file 245...
Page 784 7421 tips on using letterhead 32 Too many flash options installed [58] 133 Too many trays attached [58] 133 tools, required 43 touch screen buttons 210 transparencies tips 33 Tray [x] paper size unsupported 133 troubleshooting initial check 45 troubleshooting, image quality scanner image quality problems 60 troubleshooting, print quality blank pages 49...
Page 785: Part Number Index
7421 Part number index Part name Page 40X0270 Power cord, 2.5 m (straight)—Japan......................731 40X0271 Power cord, 2.5 m (straight)—UK, Ireland, Hong Kong, Italy..............731 40X0273 Power cord, 2.5 m (straight)—Italy, Chile, Uruguay................731 40X0275 Power cord, 1.8 m (straight)—Israel......................731 40X0288 Power cord, 2.5 m (straight)—Argentina....................731 40X0301 Power cord, 2.5 m (straight)—Australia, New Zealand................731 40X0303 Power cord, 2.5 m (straight)—PRC......................731 40X1368 USB cable, packaged (2 meters)......................733...
Page 786 7421 Part name Page 40X8569 Font card, Japanese..........................733 40X8570 Font card, Arabic............................733 40X8571 Font card, Hebrew..........................733 40X8858 ADF rear cover............................628 40X8859 Paper exit fan............................606 40X8859 Toner suction fan...........................618 40X8860 ADF controller board..........................628 40X8861 ADF right hinge............................628 40X8862 ADF frame..............................628 40X8863 ADF front Cover............................628 40X8864 ADF left hinge............................628 40X8865 ADF CIS data cable ..........................632 40X8866 ADF cushion............................630...
Page 787 7421 Part name Page 40X8869 Sensor (ADF tray empty)........................642 40X8869 Sensor (duplex pass through 1)......................602 40X8869 Sensor (duplex pass through 2)......................592 40X8869 Sensor (fuser exit)..........................602 40X8869 Sensor (fusing speed)..........................590 40X8869 Sensor (main tray empty, bottom)......................728 40X8869 Sensor (main tray near empty).......................724 40X8869 Sensor (MPF lift plate)..........................596 40X8869 Sensor (MPF paper length 1)........................598 40X8869 Sensor (MPF paper length 2)........................598...
Page 788 7421 Part name Page 40X8885 ADF feed belt............................648 40X8885 ADF registration belt..........................648 40X8887 Motor (ADF scan)...........................648 40X8888 ADF registration motor cable.........................648 40X8889 Motor (ADF registration)........................650 40X8890 ADF scan motor belt..........................650 40X8891 ADF document exit roller........................650 40X8892 ADF scan/exit roller belt.........................650 40X8893 ADF scan roller 2............................650 40X8894 ADF scan roller 1............................650 40X8895 Exit sensor housing..........................606...
Page 789 7421 Part name Page 40X8917 Main power switch..........................548 40X8919 Lower front door strap...........................548 40X8920 Tray 2 transport guide..........................594 40X8921 Scanner rear cover..........................658 40X8922 Scanner top cover..........................658 40X8923 Scanner right cover..........................658 40X8924 Screw hole cover............................658 40X8925 Control panel base..........................658 40X8926 Scanner Left cover..........................658 40X8928 Scanner glass............................660 40X8929 3000-sheet tray feed sensor cable......................700 40X8930 Sensor (scanner cover switch)........................660...
Page 790 7421 Part name Page 40X8957 Toner supply motor cable........................558 40X8958 Waste toner drive..........................560 40X8959 Waste toner duct...........................560 40X8960 Erase LED..............................562 40X8961 Photoconductor cable..........................564 40X8962 Photoconductor relay contact........................564 40X8962 Toner cartridge contact..........................556 40X8963 Transfer belt cable..........................566 40X8966 Tray 1 and 2 paper feed unit........................568 40X8968 Sensor (2 x 500-sheet tray feed)......................678 40X8968 Sensor (2 x 500-sheet tray transport)....................678 40X8968 Sensor (2500-sheet tray feed)........................718...
Page 791 7421 Part name Page 40X8980 Rear left lift handle..........................578 40X8981 2 x 500-sheet tray right rail guide wheel....................668 40X8981 Tray rail guide wheel..........................710 40X8981 Tray right rail guide wheel........................578 40X8982 Tray 1 insert rail.............................578 40X8982 Tray 2 insert rail.............................578 40X8984 Tray 1 feed cable............................580 40X8984 Tray 2 feed cable............................580 40X8985 Sensor (2 x 500-sheet tray 3 paper length)....................672 40X8985 Sensor (2 x 500-sheet tray 4 paper length)....................672...
Page 792 7421 Part name Page 40X9012 Registration unit gear..........................592 40X9013 Registration unit belt..........................592 40X9014 2 x 500-sheet tray insert stopper......................668 40X9017 Tray 3 right front cover..........................682 40X9019 Right door upper lock..........................594 40X9020 Right door switch actuator........................594 40X9022 MPF separator gear..........................596 40X9023 MPF feed clutch.............................596 40X9024 MPF lift plate solenoid...........................596 40X9026 MPF paper length 1 sensor actuator......................598 40X9026 MPF paper length 2 sensor actuator......................598...
Page 793 7421 Part name Page 40X9163 Motor (transport)...........................610 40X9164 Main drive assembly..........................610 40X9165 Transport motor gear..........................610 40X9166 Duplex transport clutch..........................610 40X9167 Redrive exit guide...........................606 40X9170 Motor (feed)............................610 40X9170 Motor (tray 2 transport).........................610 40X9171 Motor (registration)..........................610 40X9173 Feed motor belt............................610 40X9174 Feed drive belt............................610 40X9177 Fuser drive gearbox..........................614 40X9178 Fuser exit clutch.............................616 40X9179 Motor (fuser pressure)...........................616...
Page 794 7421 Part name Page 40X9203 Main power supply, 100 V........................622 40X9204 Main power supply, 230 V........................622 40X9205 Main power supply fan with duct......................622 40X9207 Engine controller board..........................626 40X9209 Controller board fan..........................626 40X9210 ADF/scanner image controller board.....................626 40X9211 Sensor (ADF scan)...........................654 40X9212 ADF exit sensor cable..........................654 40X9213 Motor (CIS glass clean)...........................656 40X9214 CIS glass clean belt..........................656...
Page 795 7421 Part name Page 40X9275 3000-sheet tray release handle......................694 40X9276 3000-sheet tray elevator spring......................694 40X9277 3000-sheet tray elevator release spring....................702 40X9279 3000-sheet tray caster wheel.........................690 40X9280 2 x 500-sheet tray rear cover.........................666 40X9280 2500-sheet tray rear cover........................708 40X9281 2 x 500-sheet tray left cover........................666 40X9281 2500-sheet tray left cover........................708 40X9282 2 x 500-sheet tray caster wheel......................666 40X9282 Caster wheel............................708...
Page 796 7421 Part name Page 40X9298 2500-sheet tray transport gear......................716 40X9299 2 x 500-sheet tray transport roller......................678 40X9299 2500-sheet tray transport roller......................718 40X9300 2 x 500-sheet tray 4 pick assembly sensor cable..................678 40X9304 Tray lock lever..........................682, 684 40X9305 2 x 500-sheet tray left rail guide wheel....................668 40X9305 Tray insert guide wheel..........................582 40X9305 Tray insert guide wheel..........................586 40X9305 Tray insert guide wheel..........................682...
Page 797 7421 Part name Page 40X9527 Right door switch...........................594 40X9564 Motor (developer)..........................610 40X9576 2500-sheet tray insert (A4)........................722 40X9599 Exit sensor cable.............................606 40X9602 2500-sheet tray insert (LTR)........................722 40X9615 MPF separator roller..........................598 40X9635 Tray 3 insert............................682 40X9639 Tray 2 transport drive belt........................610 40X9644 Redrive exit sensor cable........................606 40X9661 Control panel............................550 40X9663 Controller board (MFP)..........................626 40X9669 Maintenance kit, 300K...........................729...
Page 798 7421 Part name Page 40X9697 Tray 4 insert............................684 40X9698 3000-sheet tray interface cable......................705 40X9699 ADF CIS clean motor cable........................636 40X9700 ADF CIS clean sensor cable........................636 40X9701 ADF exit sensor cable..........................636 40X9702 Scanner sensor cable..........................660 40X9704 Transfer belt maintenance kit........................566 40X9706 Registration primary gear........................588 40X9707 Registration secondary gear........................588 40X9708 Toner density sensor cable........................588 40X9710 Lower registration gear..........................592...
Page 799 7421 Part name Page 40X9735 Induction heater magnetic erase board cable..................620 40X9736 Induction heater power supply cable.....................620 40X9737 Noise filter board cable..........................620 40X9740 Power socket cable..........................624 40X9741 Power socket............................624 40X9744 Engine controller board FFC........................626 40X9747 ADF paper guide gear..........................638 40X9748 ADF paper length 2 sensor actuator (A4)....................638 40X9750 Toner cartridge relay contact cable.......................556 40X9751 Toner cartridge present sensor cable....................558 40X9758 Tray empty board mount........................544...
Page 800 7421 Part name Page 40X9787 2500-sheet tray pick assembly sensor cable..................718 40X9788 2500-sheet tray lock lever........................722 40X9789 2500-sheet tray front cover........................722 40X9791 Paper stack transfer guide base......................724 40X9792 Paper stack transfer guide........................724 40X9793 Paper stack transfer sensor actuator (A4)....................724 40X9794 Paper stack transfer sensor actuator spring..................724 40X9795 Transfer guide secondary gear.......................726 40X9796 Transfer guide primary gear........................726 40X9797 Transfer guide primary gear spring......................726...
Page 801 7421 Part name Page 40X9886 3000-sheet tray separator roller drive gear...................698 40X9887 3000-sheet tray separator roller secondary gear...................698 40X9888 3000-sheet tray separator roller clutch....................698 40X9889 2 x 500 sheet tray lift motor cable......................672 40X9890 2 x 500-sheet tray cable harness......................676 40X9891 2 x 500-sheet tray feed and transport primary gear................670 40X9891 2500-sheet tray feed and transport primary gear.................712 40X9892 2 x 500-sheet tray transport gear spring....................676...
Page 802 7421 Part name Page 40X9936 Developer unit............................562 40X9940 ADF rear paper guide ..........................638 40X9941 ADF tray..............................638 40X9942 ADF front paper guide..........................638 40X9943 ADF bin paper stopper...........................638 40X9944 ADF tray bottom cover...........................638 40X9945 ADF paper guide rack..........................638 40X9946 ADF top cover............................640 40X9947 ADF door frame............................640 40X9948 ADF CIS idler roller..........................634 40X9948 ADF registration idler roller........................642...
Page 803 7421 Part name Page 40X9973 Control panel bottom cover........................658 40X9974 Cave light LED cable..........................658 40X9975 Scanner drive motor cable........................664 40X9976 Scanner mirror............................664 40X9977 Erase LED cable............................562 40X9978 Photoconductor release lever........................564 40X9979 Transfer belt paper guide........................566 40X9980 Tray 2 transport drive gear........................568 40X9981 Roller clutch........................570, 574, 678, 718 40X9982 2 x 500-sheet tray set actuator......................678 40X9982 2500-sheet tray tray set actuator......................718...
Page 804 7421 Part name Page 41X0452 Control panel cover assembly........................552 41X0453 Control panel cable kit...........................552 41X0454 Control panel touch screen display (10 in.)....................552 41X0455 Control panel UICC..........................552 Part number index...
Page 805: Part Name Index
7421 Part name index Part name Page 40X9889 2 x 500 sheet tray lift motor cable......................672 40X9775 2 x 500 sheet tray paper length sensor cable..................672 40X9882 2 x 500-sheet tray 3 feed and transport motor cable................670 40X9316 2 x 500-sheet tray 3 pick assembly sensor cable..................678 40X9774 2 x 500-sheet tray 4 feed and transport motor cable................670 40X9300 2 x 500-sheet tray 4 pick assembly sensor cable..................678 40X9285 2 x 500-sheet tray bottom right cover....................666...
Page 806 7421 Part name Page 40X9892 2 x 500-sheet tray transport gear spring....................676 40X9299 2 x 500-sheet tray transport roller......................678 40X9309 2 x 500-tray insert paper length sensor actuator...................686 40X9285 2500-sheet tray bottom right cover.......................708 40X9786 2500-sheet tray cable harness.......................716 40X9785 2500-sheet tray controller board......................710 40X9806 2500-sheet tray elevator damper......................728 40X9801 2500-sheet tray elevator home sensor actuator..................728 40X9800 2500-sheet tray elevator home sensor actuator spring.................728...
Page 807 7421 Part name Page 40X9298 2500-sheet tray transport gear......................716 40X9893 2500-sheet tray transport gear bushing....................716 40X9892 2500-sheet tray transport gear spring....................716 40X9299 2500-sheet tray transport roller......................718 40X9809 2500-sheet tray tray insert sensor cable....................728 40X9982 2500-sheet tray tray set actuator......................718 40X9279 3000-sheet tray caster wheel.........................690 40X9262 3000-sheet tray controller board......................704 40X9202 3000-sheet tray controller board cable....................705 40X9277 3000-sheet tray elevator release spring....................702...
Page 808 7421 Part name Page 40X9773 3000-sheet tray separator roller primary gear..................698 40X9887 3000-sheet tray separator roller secondary gear...................698 40X9040 3000-sheet tray set sensor actuator......................700 40X9373 3000-sheet tray set sensor actuator spring...................700 40X9259 3000-sheet tray slit cover........................688 40X9260 3000-sheet tray top door........................688 40X9771 3000-sheet tray transport idler roller....................700 40X9273 3000-sheet tray transport roller......................700 40X9769 3000-sheet tray transport roller drive gear...................700...
Page 809 7421 Part name Page 40X8933 ADF duplex scan glass ..........................660 40X9953 ADF exit roller............................656 40X9687 ADF exit roller gear..........................650 40X9701 ADF exit sensor cable..........................636 40X9212 ADF exit sensor cable..........................654 40X9041 ADF fan..............................628 40X8878 ADF feed and pick roller assembly......................644 40X8885 ADF feed belt............................648 40X9950 ADF feed gear............................648 40X9683 ADF feed motor cable..........................648 40X9681 ADF feed roller............................644...
Page 810 7421 Part name Page 40X9684 ADF scan motor cable..........................650 40X9685 ADF scan motor gear..........................650 40X8894 ADF scan roller 1............................650 40X8893 ADF scan roller 2............................650 40X9686 ADF scan roller 2 gear..........................650 40X9688 ADF scan roller 3 gear..........................650 40X9690 ADF scan sensor cable..........................654 40X8892 ADF scan/exit roller belt.........................650 40X9679 ADF sensor cable............................628 40X8882 ADF separator pad..........................646...
Page 811 7421 Part name Page 40X9967 Control panel cable guide lower cover....................550 40X9969 Control panel cable guide upper cover....................550 41X0453 Control panel cable kit...........................552 41X0452 Control panel cover assembly........................552 40X9964 Control panel hinge..........................550 40X9972 Control panel mount..........................658 41X0454 Control panel touch screen display (10 in.)....................552 41X0455 Control panel UICC..........................552 40X9663 Controller board (MFP)..........................626 40X8910 Controller board access cover........................546...
Page 812 7421 Part name Page 40X9199 Expansion controller board........................620 40X7854 Fax card..............................733 40X9267 Feed and pick roller..........................696 40X9727 Feed drive assembly..........................610 40X9174 Feed drive belt............................610 40X9173 Feed motor belt............................610 40X9726 Feed motor gear.............................610 40X8970 Feed roller..........................574, 678, 718 40X8970 Feed/separator roller........................582, 586 40X8907 Finisher interface cable..........................546 40X8555 Flash memory, 256 MB..........................733 40X8570 Font card, Arabic............................733...
Page 813 7421 Part name Page 40X9990 Fusing speed sensor cable........................590 40X9193 High voltage board..........................620 40X9194 High voltage charge cable........................620 40X9191 High voltage charge contact........................620 40X9192 High voltage developer contact......................620 40X9734 High voltage toner charge cable......................620 40X9733 High voltage transfer cable........................620 40X9042 HPT bin paper bail..........................606 40X8946 Image controller board..........................554 40X9198 Induction heater magnetic erase board....................620 40X9735 Induction heater magnetic erase board cable..................620...
Page 814 7421 Part name Page 40X9672 Maintenance kit, 200K (ADF).........................729 40X9673 Maintenance kit, 200K (MPF).........................729 40X9669 Maintenance kit, 300K...........................729 40X9293 Motor (2 x 500-sheet tray 3 feed)......................670 40X8987 Motor (2 x 500-sheet tray 3 lift)......................672 40X9293 Motor (2 x 500-sheet tray 3 transport)....................670 40X9293 Motor (2 x 500-sheet tray 4 feed)......................670 40X8987 Motor (2 x 500-sheet tray 4 lift)......................672 40X9293 Motor (2 x 500-sheet tray 4 transport)....................670...
Page 815 7421 Part name Page 40X8987 Motor (tray 2 lift)...........................580 40X9170 Motor (tray 2 transport).........................610 40X9027 MPF................................596 40X9023 MPF feed clutch.............................596 40X9719 MPF feed clutch gear..........................596 40X9995 MPF feed roller............................596 40X9996 MPF lift plate cam ..........................596 40X9720 MPF lift plate clutch..........................596 40X9716 MPF lift plate sensor cable........................596 40X9024 MPF lift plate solenoid...........................596 40X9026 MPF paper length 1 sensor actuator......................598...
Page 816 7421 Part name Page 40X9978 Photoconductor release lever........................564 40X9925 Pick roller........................574, 582, 586, 678, 718 40X9763 Port access door.............................546 40X8912 Port mount.............................546 40X0275 Power cord, 1.8 m (straight)—Israel......................731 40X7104 Power cord, 2.5 m (right‑angled)—USA, Canada, Latin America............731 40X0288 Power cord, 2.5 m (straight)—Argentina....................731 40X0301 Power cord, 2.5 m (straight)—Australia, New Zealand................731 40X1766 Power cord, 2.5 m (straight)—Bolivia, Peru...................731 40X4596 Power cord, 2.5 m (straight)—Brazil......................731...
Page 817 7421 Part name Page 40X9724 Redrive belt............................606 40X9215 Redrive diverter gear..........................602 40X9167 Redrive exit guide...........................606 40X9714 Redrive exit sensor actuator........................606 40X9644 Redrive exit sensor cable........................606 40X9007 Registration cable...........................588 40X9991 Registration drive gear...........................592 40X8995 Registration motor gear.........................588 40X9706 Registration primary gear........................588 40X9009 Registration roller fixed power resistor....................588 40X9707 Registration secondary gear........................588 40X8994 Registration transport assembly......................588...
Page 818 7421 Part name Page 40X8942 Scanner carriage gear..........................664 40X8935 Scanner CCD cable..........................662 40X8937 Scanner CCD lens assembly........................662 40X8934 Scanner controller board........................660 40X8931 Scanner cover open sensor actuator......................660 40X9975 Scanner drive motor cable........................664 40X8928 Scanner glass............................660 40X9762 Scanner interface cable cover........................546 40X8938 Scanner lamp............................662 40X8939 Scanner lamp cable..........................662 40X8926 Scanner Left cover..........................658...
Page 819 7421 Part name Page 40X8869 Sensor (2500-sheet tray set)........................710 40X8968 Sensor (2500-sheet tray transport)......................718 40X8869 Sensor (2500‑sheet tray transfer guide home) ..................728 40X9880 Sensor (3000-sheet tray elevator level)....................698 40X9880 Sensor (3000-sheet tray empty)......................698 40X9885 Sensor (3000-sheet tray feed)........................700 40X9880 Sensor (3000-sheet tray near empty 1)....................704 40X9880 Sensor (3000-sheet tray near empty 2)....................704 40X9880 Sensor (3000-sheet tray set)........................700 40X8869 Sensor (ADF CIS clean)..........................636...
Page 820 7421 Part name Page 40X8869 Sensor (MPF paper length 2)........................598 40X9030 Sensor (MPF paper width)........................598 40X8869 Sensor (paper stack transfer).........................724 40X9313 Sensor (redrive exit)..........................606 40X8997 Sensor (registration humidity).......................588 40X8869 Sensor (registration)..........................588 40X8869 Sensor (reserve tray empty)........................728 40X8869 Sensor (reserve tray paper limit)......................724 40X8869 Sensor (scan glass clean)........................654 40X9313 Sensor (scanner cover open)........................660 40X8930 Sensor (scanner cover switch)........................660...
Page 821 7421 Part name Page 40X4819 Serial interface card, RS‑232C........................733 40X9968 Speaker..............................550 40X9966 Speaker cover............................550 40X9924 Standard bin............................544 40X8897 Standard bin base...........................544 40X8974 Standard bin paper bail..........................606 40X8951 Toner agitator............................556 40X8962 Toner cartridge contact..........................556 40X9223 Toner cartridge drive assembly......................612 40X9751 Toner cartridge present sensor cable....................558 40X9750 Toner cartridge relay contact cable.......................556 40X9708 Toner density sensor cable........................588 40X8998 Toner density solenoid...........................588...
Page 822 7421 Part name Page 40X8982 Tray 1 insert rail.............................578 40X8971 Tray 1 paper feed clutch.........................570 40X8972 Tray 1 sensor cables..........................570 40X8903 Tray 2 empty indicator...........................544 40X9899 Tray 2 empty sensor actuator........................574 40X8984 Tray 2 feed cable............................580 40X8992 Tray 2 insert............................586 40X8982 Tray 2 insert rail.............................578 40X8971 Tray 2 paper feed clutch.........................574 40X9728 Tray 2 transport drive assembly......................610...
Page 823 7421 Part name Page 40X9305 Tray insert guide wheel..................582, 586, 682, 684, 728 40X9784 Tray insert guide wheel........................710, 728 40X9306 Tray insert paper length guide.......................686 40X9305 Tray left rail guide wheel........................578 40X9304 Tray lock lever..........................682, 684 40X9308 Tray near empty sensor actuator......................584 40X9306 Tray paper length guide.........................584 40X9925 Tray pick roller............................570 40X8981 Tray rail guide wheel..........................710...
Page 824 7421 Part name index...

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Mx911dte Mx912dxe Mx91x Xm91x5

Lexmark MX910de Service Manual

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Preface

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