Lexmark E350d - E B/W Laser Printer Service Manual
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Lexmark E350d - E B/W Laser Printer Service Manual

Service manual
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See also: Installation , User Manual
• Table of contents
• Start diagnostics
• Safety and notices
• Trademarks
• Index
Edition: May 15, 2007
Lexmark™ E350d, E352dn
Lexmark and Lexmark with diamond design are
trademarks of Lexmark International, Inc., registered
in the United States and/or other countries.
4512-420
4512-430

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Summary of Contents for Lexmark E350d - E B/W Laser Printer

  • Page 1 Lexmark™ E350d, E352dn 4512-420 4512-430 • Table of contents • Start diagnostics • Safety and notices • Trademarks • Index Lexmark and Lexmark with diamond design are trademarks of Lexmark International, Inc., registered in the United States and/or other countries.
  • Page 2 Improvements or changes in the products or the programs described may be made at any time. Comments may be addressed to Lexmark International, Inc., Department D22A/032-2, 740 West New Circle Road, Lexington, Kentucky 40550, U.S.A or e-mail at ServiceInfoAndTraining@Lexmark.com. Lexmark may use or distribute any of the information you supply in any way it believes appropriate without incurring any obligation to you.

  • Page 3: Table Of Contents

    4512-420, -430 Table of Contents Table of Contents............iii Notices and safety information .
  • Page 4 Part number index ............I-5 Lexmark™ E350d, E352dn...

  • Page 5: Notices And Safety Information

    4512-420, -430 Notices and safety information The following laser notice labels may be affixed to this printer as shown: Laser notice The printer is certified in the U.S. to conform to the requirements of DHHS 21 CFR 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.
  • Page 6 Klasse I-laserprodukter betragtes ikke som farlige. Printeren indeholder internt en Klasse IIIB (3b)-laser, der nominelt er en 5 milliwatt galliumarsenid laser, som arbejder på bølgelængdeområdet 770-795 nanometer. Lasersystemet og printeren er udformet således, at mennesker aldrig udsættes for en laserstråling over Klasse I-niveau ved normal drift, brugervedligeholdelse eller obligatoriske servicebetingelser. Lexmark™ E350d, E352dn...
  • Page 7 4512-420, -430 Huomautus laserlaitteesta Tämä kirjoitin on Yhdysvalloissa luokan I (1) laserlaitteiden DHHS 21 CFR Subchapter J -määrityksen mukainen ja muualla luokan I laserlaitteiden IEC 60825-1 -määrityksen mukainen. Luokan I laserlaitteiden ei katsota olevan vaarallisia käyttäjälle. Kirjoittimessa on sisäinen luokan IIIb (3b) 5 milliwatin galliumarsenidilaser, joka toimii aaltoalueella 770 - 795 nanometriä.
  • Page 8 4512-420, -430 viii Lexmark™ E350d, E352dn...

  • Page 9: Safety Information

    4512-420, -430 Safety information • The safety of this product is based on testing and approvals of the original design and specific components. The manufacturer is not responsible for safety in the event of use of unauthorized replacement parts. • The maintenance information for this product has been prepared for use by a professional service person and is not intended to be used by others.
  • Page 10 Antes de começar, desligue o produto da tomada eléctrica ou seja cuidadoso caso o produto tenha de estar ligado à corrente eléctrica para realizar a tarefa necessária. Lexmark™ E350d, E352dn...
  • Page 11 4512-420, -430 Informació de Seguretat • La seguretat d'aquest producte es basa en l'avaluació i aprovació del disseny original i els components específics. El fabricant no es fa responsable de les qüestions de seguretat si s'utilitzen peces de recanvi no autoritzades. •...

  • Page 12: Preface

    CAUTION: When you see this symbol, there is a danger from hazardous voltage in the area of the product where you are working. Unplug the product before you begin, or use caution if the product must receive power in order to perform the task. Lexmark™ E350d, E352dn...

  • Page 13: General Information

    4512-420, -430 1. General information are monochrome laser printers designed for single users or small The Lexmark™ E350d and E352dn workgroups. This book contains information on E350d and E352dn. For information on E250d and E250dn, see the 4512-220,-230 service manual.

  • Page 14: Overview Of The Operator Panel

    , Select , and Right Menu ), Back , and Go • An indicator light A label located on the inside front door shows the operator panel buttons. An additional translated label is included in the printer box. Lexmark™ E350d, E352dn...

  • Page 15: Specifications

    4512-420, -430 Specifications Memory 4512-420 4512-430 Item Lexmark E350d Lexmark E352dn Standard DRAM 32MB 32MB Optional SDRAM 32MB Optional SDRAM 64MB Optional SDRAM 128MB Optional SDRAM 256MB Maximum DRAM 160MB 160MB Optional flash memory 32MB Optional font cards (DBCS) Print speed...

  • Page 16: Media Trays And Supply Capacity

    High toner cartridge 9,000 standard pages¹ 9,000 standard pages¹ Photoconductor kit Up to 30,000 ² Up to 30,000 ² ¹ Declared value in accordance with ISO/IEC 19752 ² Based on approximately 5% coverage, actual yield may vary Lexmark™ E350d, E352dn...

  • Page 17: Connectivity And Compatibility

    4512-420, -430 Connectivity and compatibility 4512-420 4512-430 Item Lexmark E350d Lexmark E352dn Data stream emulations PCL 6 PostScript 3 PPDS Compatibility Windows/Macintosh/Linux Windows/Macintosh/Linux Standard local connections Parallel (IEE 1284 Bi-Di) USB* Standard network connections Ethernet (10/100 Base TX) Optional local connections...

  • Page 18: Types Of Print Media

    ** Use for occasional printing only. ¹ Universal size ranges: – Manual feeder: 76–216 x 127–356 mm (3.0–8.5 x 5.0–14.0 in.) (includes 3 x 5 in. cards) ² Grain short is recommended. Use rear exit for best results. Lexmark™ E350d, E352dn...

  • Page 19: Tips On Preventing Jams

    4512-420, -430 Tips on preventing jams Paper path *Measurements are approximate paper lengths (millimeters) **Sensors are measured at rotation/position which they are tripped Paper path 117.8 Manual feed sensor Upper end feed rolls 60.5 Input sensor 49.0 Transfer roll 110.7 Fuser 26.9 Fuser exit rolls...

  • Page 20: Tools

    Have any exposed adhesive when the flap is in the sealed position • Use only recommended media. Refer to the Card Stock & Label Guide available on the Lexmark Web site at www.lexmark.com for more information about which media provides optimum results for the current printing environment.

  • Page 21: Acronyms

    4512-420, -430 Acronyms Autocompensator Mechanism (or paper feed) Analog-to-digital Converter ASIC Application Specific Integrated Circuit Complete Bill Of Material Development Roll (of print cartridge/photoconductor system) DIMM Dual In-Line Memory Module External Network Adapter Field Replaceable Unit Host Based Printing HVPS High Voltage Power Supply Liquid Crystal Diode Light Emitting Diode...
  • Page 22 4512-420, -430 1-10 Lexmark™ E350d, E352dn...

  • Page 23: Diagnostics Information

    4512-420, -430 2. Diagnostics information Start CAUTION: Unplug power from the printer before connecting or disconnecting any cable, assembly, or electronic card. This is a precaution for personal safety and to prevent damage to the printer. This chapter contains the codes and diagnostic tools to aid in providing corrective action for a malfunctioning printer.

  • Page 24: Overview Of The Operator Panel And Menus

    4512-420, -430 Overview of the operator panel and menus Indicator light The indicator light gives information about the status of the printer. If the light is The printer is On, but idle Blinking On and busy Lexmark™ E350d, E352dn...

  • Page 25: Buttons

    4512-420, -430 Buttons Use the six operator panel buttons to open a menu, scroll through a list of values, change printer settings, and respond to printer messages. Note: Buttons act on the information displayed on the second line of the operator panel. The use of the buttons and the layout of the display are described in the following table: Button or control panel item Function...

  • Page 26: Diagram Of The Printer Menus

    PPDS (if activated) Parallel Menu Network Menu USB Menu Orientation Std Parallel Standard Network Standard USB Lines per Page Lines per inch Page Format Character Se Best Fit Tray 1 Renumber Auto CR after LF Auto LF after CR Lexmark™ E350d, E352dn...

  • Page 27: Messages And Error Codes

    4512-420, -430 Messages and error codes User attendance messages The printer control panel displays messages describing the current state of the printer and indicates possible printer problems that must be resolved. This topic provides a list of all printer messages, explains what they mean, and tells how to clear the messages.
  • Page 28 Program Flash The printer is storing resources, such as fonts or macros, in flash memory. DO NOT POWER OFF Wait for the message to clear. Warning: Do not turn the printer off while this message is displayed. Lexmark™ E350d, E352dn...
  • Page 29 4512-420, -430 User attendance messages (Continued) Message Action Prog System Code The printer is programming new system code. Wait for the message to DO NOT POWER OFF clear and the printer to reset. Warning: Do not turn the printer off while this message is displayed. Ready Send a job to print.

  • Page 30: Cartridge Error Messages

    Transport motor error detected 200.17 Took too long to ramp up transport motor 200.18 Manual feeder sensor never became uncovered from the sheet ahead. 200.19 The media never reached the input sensor, but was detected at manual feeder sensor. Lexmark™ E350d, E352dn...
  • Page 31 4512-420, -430 Paper jam error codes (200-series) (Continued) Error Description 200.20 The media is too long over the manual feeder sensor. Possible causes include multi-sheet feed, media size (length) problem, pre-staged media in the tray. 200.22 FAILED SMALL GAP OR NO GAP JAM RECOVERY. Engine detected small gap or no gap at the manual feeder sensor, opened the gap by stopping the feed rolls, but never saw the leading edge of the second page at the input sensor.
  • Page 32 241.19 Second pick attempted failed from Tray 1, no pages printed since calling a 241.10 or a prior 241.19. 242.00 Paper jam near tray 2. 2-10 Lexmark™ E350d, E352dn...
  • Page 33 4512-420, -430 Paper jam error codes (200-series) (Continued) Error Description 242.01 Took too long to ramp up dc feed motor 242.08 Received lots of dc feed interrupts before losing them 242.10 Second pick attempt failed from Tray 2 242.12 Second pick from manual feeder, tray 1, or feeder failed when media was in the source, other sheets were committed to the paper path.

  • Page 34: Service Error Codes

    Belt fuser was under temperature when the media reached the fuser nip. 923.00 Fuser is over temperature. 923.01 Fuser is over temperature. This applies to the fuser and belt fusers. 924.00 Open thermistor check. 924.01 Open thermistor check failure. This applies to the fuser and belt fusers. 2-12 Lexmark™ E350d, E352dn...
  • Page 35 4512-420, -430 Service error codes (9xx) (Continued) Error Description 924.02 Open thermistor check failure. The ADC failed to converge. Possible noisy thermistor signal. This applies to the fuser and belt fusers. Fan service errors 927.00 Service fan error 927.03 Main fan took too long to ramp up 927.04 Main fan is under speed or stalled during speed adjustment state 927.05...
  • Page 36 937.03 Overspeed detected during speed control Power supply service errors 940.00 LVPS service error 940.01 Line frequency outside allowed range of 45Hz-64Hz 940.02 Line frequency below 43Hz 940.03 No zero cross detected on belt fuser model 2-14 Lexmark™ E350d, E352dn...

  • Page 37: Symptom Tables

    4512-420, -430 Symptom tables POST symptom table Symptom Action “Cover interlock switch service check” on page 2-18. The main motor, cooling fan, and fuser do not come “Operator panel service check” on page 2-21. POST completes, but the LCD does not come on. “Main motor service check”...

  • Page 38: Printer Symptom Table

    Dead machine (no power). “Solving print quality problems” on page 3-28. Print quality problems • Light print • Blurred characters • Toner on both sides of media • Toner not fused • Streaks • Blank pages 2-16 Lexmark™ E350d, E352dn...

  • Page 39: Service Checks

    4512-420, -430 Service checks Service checks which involve measuring voltages on the LVPS/HVPS (low voltage power supply/ high voltage power supply board) should be performed with the printer positioned on its back side. Note: When making voltage readings, always use frame ground unless another ground is specified.

  • Page 40: Cooling Fan Service Check

    • If both pass continuity, turn the printer on, and measure +5 V dc on pin 2 at J6 on the controller card. • Verify pin 3 at J6 is ground. “Controller card service check” on page 2-17 • If voltage or ground is not present, see for more information. 2-18 Lexmark™ E350d, E352dn...

  • Page 41: Dead Machine Service Check

    4512-420, -430 Dead machine service check CAUTION: Check the AC line voltage. The voltage should be within the following limits: • 100 V ac (volts alternating current) – 127 V ac for the 110 V printer • 200 V ac – 240 V ac for the 220 V printer Action Unplug the printer.

  • Page 42: Lvps/Hvps Service Check

    • If these voltages are not correct, see card. Settings are lost page 5-2, or replace the controller card. See “Controller card removal” on page 4-13. when both are new and replaced at the same time. 2-20 Lexmark™ E350d, E352dn...

  • Page 43: Operator Panel Service Check

    4512-420, -430 Operator panel service check Inspect the operator panel cable for damage. Make sure the cable is plugged in securely. Run POST and check “Power–On Self Test (POST) sequence” on page 2-1. each light for proper operation. See LCD Operator panel service check Action Lights Operator panel (LCD)

  • Page 44: Media Picks But Stops Halfway Through The Printer

    • If it is not, replace the solenoid assembly. “Controller card • If the resistance is 180–250 ohms, check the controller card. See service check” on page 2-17 for more information. Replace controller card as necessary. 2-22 Lexmark™ E350d, E352dn...

  • Page 45: Parallel Or Usb Port Service Check

    4512-420, -430 Media skews Action Paper feed (pick tires) tray 1 Check tires for debris. If tires are new, try reversing each on its hub. Paper feed (pick tires) tray 2 Check side guides on Tray 1 and Tray 2. Guides set for a full stack of media may be Tray 1 too wide when the stack is short.

  • Page 46: Print Quality Service Checks

    • If there is not continuity, call the next level of service. Try a different toner cartridge and PC kit. • If those fail, replace the LVPS/HVPS, controller card, or the printhead in that order. “Solving print quality problems” on page 3-28. Also, see 2-24 Lexmark™ E350d, E352dn...

  • Page 47: Black Page

    4512-420, -430 Black page Note: Incorrect laser exposure or incorrect charging of the photoconductor causes an all black page. Always verify the same results from a different print cartridge assembly and developer before proceeding. Action Toner electrodes (not a Check the three rearward electrodes below the print cartridge assembly for contamination FRU) or damage.

  • Page 48: Variation In Image Density Horizontally Across Page

    See“LVPS/HVPS service check” on page 2-20 for more information. Try changing the setting to heavier paper or even card stock. Media (not a FRU) Make sure recommended media is being used. Check the media settings in the printer driver. 2-26 Lexmark™ E350d, E352dn...

  • Page 49: Light Print

    4512-420, -430 Light print Action Toner cartridge (not a Make sure the toner cartridge and PC Kit are installed correctly and that the toner cartridge FRU) is not low on toner. If the problem continues, install a new toner cartridge. Recheck condition before replacing PC Kit, if necessary.

  • Page 50: Solving Print Quality Problems

    Replace as needed. If the lines are parallel and match the two intended ghost images, the Form Type may be incorrectly set. Check those settings. The PC cleaner sump may be full. Replace the PC kit. 2-28 Lexmark™ E350d, E352dn...
  • Page 51 4512-420, -430 Print quality problems (Continued) Problem Cause / action Toner smears or rubs • Toner is not being fused to the paper. Replace the fuser. off the page. • Change the media texture setting in the driver. If special media is being used, such as card stock or labels, be sure to select the correct media type.
  • Page 52 • Clear all jams. has been cleared. • Press and release , or open and close the printer cover to restart the printer. • Make sure the print cartridge assembly is installed properly. 2-30 Lexmark™ E350d, E352dn...

  • Page 53: Printhead Service Check

    4512-420, -430 Print quality problems (Continued) Problem Cause / action Unexpected characters • Ensure correct printer driver is being used. print or characters are • Select hex trace mode to determine what the problem is. missing. • Restore factory defaults. •...
  • Page 54 4512-420, -430 2-32 Lexmark™ E350d, E352dn...

  • Page 55: Diagnostic Aids

    4512-420, -430 3. Diagnostic aids Accessing service menus There are two different test menus that can be accessed during POR to identify problems with the printer. Configuration Menu 1. Turn off the printer. The Configuration menu group contains a set and Back of menus, settings and operations which are 2.

  • Page 56: Configuration Menu (Config Menu)

    When you install a new photoconductor, this number should be reset. To reset the counter: Select Reset PC Cnt from the CONFIG MENU. Press to reset the counter to zero. Note: Permanent page count is not affected by this operation. Lexmark™ E350d, E352dn...

  • Page 57: Print Quality Pages (Prt Quality

    4512-420, -430 Print quality pages (Prt Quality Pgs) To print the Print Quality Pages: Select Prt Quality Pgs from CONFIG MENU. Press Four pages print. Additional button presses are ignored until the pages have printed. If duplex is selected, the pages print front and back. The first page is a mix of graphics and text.

  • Page 58: Reduced Curl

    To change the speed of the USB: Select USB Speed from the CONFIG MENU. Select Auto (default) or Full. Press to save the desired speed. Exit Config Menu Select Exit Config Menu to exit the Configuration Menu and return to normal mode. Lexmark™ E350d, E352dn...

  • Page 59: Diagnostics Mode

    4512-420, -430 Diagnostics mode Entering Diagnostics Mode Turn off the printer. Press and hold Go and Back Turn on the printer. Release the buttons when Performing Self Test displays. Available tests The tests display on the operator panel in the order shown: Diagnostics mode tests REGISTRATION “Margins”...
  • Page 60 “Gap Adjust” on page 3-21. Gap Adjust EVENT LOG “Display Log” on page 3-21. Display Log “Print Log” on page 3-22. Print Log “Clear Log” on page 3-22. Clear Log EXIT DIAGNOSTICS “Exit Diagnostics” on page 3-22. Lexmark™ E350d, E352dn...

  • Page 61: Registration

    4512-420, -430 Registration Margins To set print registration: Select REGISTRATION from the Diagnostics menu. Select Margins from the REGISTRATION menu. The Top margin sign/value pair blinks. This indicates it is the margin value being changed. T=sxx* B=-sxx* L=sxx* To select the margin value to be changed, press until the margin value pair you want to change is blinking.

  • Page 62: Printhead Assembly Electronic Adjustment

    In column <BA> of Step 1 test page, look for the position where the vertical lines are the closest to each other. Press to select the corresponding number (new setting). Press and release to move to the <CA> pattern on the right side of Step 1 test page. Press to select the <CA> setting. Lexmark™ E350d, E352dn...
  • Page 63 4512-420, -430 Press Go to print Step 2 test page. Step 2 printout (sample only; use actual sheet) Press to change the <BA> settings to the number beside the darkest portion of the vertical bar. Press and release to move to the <CA> settings on the right side of Step 2 test page. Press to change the <CA>...
  • Page 64 <BA> setting to the number beside the darkest portion of the vertical bar. Press and release to move to the <CA> settings on the right side of Step 3 test page. Press to change the <CA> settings to the number beside the darkest portion of the vertical bar. 3-10 Lexmark™ E350d, E352dn...
  • Page 65 4512-420, -430 Press Go to print Visual alignment page. Visual alignment printout (sample only; use actual sheet) Verify that the overall darkest line across the page is “0.” If not, then run the alignment again. Turn the printer off to exit the printer alignment menu. 3-11 Diagnostic aids...

  • Page 66: Printhead Assembly Mechanical Adjustment

    Fold the printed test page on the left side so that a few millimeters of grid lines wrap around the outside of the fold. See photo below. Fold a second vertical fold near the center so that the left side top edge aligns with the right side top edge. 3-12 Lexmark™ E350d, E352dn...
  • Page 67 4512-420, -430 If the grid lines of the right flap align below the corresponding lines on the left flap, adjust the printhead clockwise relative to the printer and recheck. (See the left side of the figure below.) If the grid lines of the left flap align below the corresponding lines of the right side, adjust the printhead counterclockwise.

  • Page 68: Print Tests

    Four pages print. Additional button presses are ignored until the pages have printed. The first page is a mix of graphics and text. The second two pages are graphics, and the last page is blank. The Print Quality pages can also be printed from the Configuration Menu. 3-14 Lexmark™ E350d, E352dn...

  • Page 69: Hardware Tests

    4512-420, -430 Hardware tests Select the following selections from HARDWARE TESTS: • LCD Panel • Buttons • Op Panel • DRAM • Parallel Port LCD Test This test continuously executes a pattern. Select LCD Test from Diagnostics Mode. The test continually executes. Press Return or Stop to cancel the test.

  • Page 70: Duplex Tests

    This test is used to determine if the input sensor is operating correctly. • If the sensor is operating correctly, OP (Open) will appear on the display: Sensor Test Input=OP • Press Back to return to the DUPLEX TESTS menu. 3-16 Lexmark™ E350d, E352dn...

  • Page 71: Input Tray Tests

    4512-420, -430 Duplex Feed 1 Select Duplex Feed 1 from the DUPLEX TESTS menu. The following will appear on the display: Duplex Feed 1 Feeding... A blank page will feed through the printer. The following will appear on the display: Duplex Feed 1 Clear Paper...

  • Page 72: Base Sensor Test

    Input (input sensor) Output (exit sensor) Front Door (front access door sensor) The selected sensor is displayed with OP for open or CL for closed. You can actuate the sensors to toggle between open and closed. 3-18 Lexmark™ E350d, E352dn...

  • Page 73: Printer Setup

    4512-420, -430 Printer setup Defaults Selections are U.S. or Non-U.S. This selection affects the following defaults: Printer setting U.S. value Non-U.S. value Default paper size* Letter Envelope size* 10 Envelope DL Envelope Fax paper size Letter PCL Symbol Set PC-8 PC-850 PPDS code page Units of measure...

  • Page 74: Serial Number

    Incrementing this value by one means the strobe is sampled 50 nanoseconds longer. The range of values are between -4 and +6, in increments of one. A value of zero indicates no change is made from the factory setting. 3-20 Lexmark™ E350d, E352dn...

  • Page 75: Ep Setup

    4512-420, -430 EP setup EP Defaults Restores all EP settings to factory default values. Selections are Restore and Do Not Restore. Fuser Temperature (Fuser Temp) Changing this setting can reduce media curl or melting of some letterhead images. Selections are Normal (default), Lower, and Lowest.

  • Page 76: Exit Diagnostics

    Page counts for each error The printed error log can be faxed to Lexmark or your next level of support for verification or diagnosis. This report can also be printed from the Configuration Menu. Because you can clear error logs, the contents of this log may not match the contents when you view the error log.

  • Page 77: Repair Information

    4512-420, -430 4. Repair information Warning: Read the following before handling electronic parts. Handling ESD-sensitive parts Many electronic products use parts that are known to be sensitive to electrostatic discharge (ESD). To prevent damage to ESD-sensitive parts, follow the instructions below in addition to all the usual precautions, such as turning off power before removing logic cards: •...

  • Page 78: Front Access Cover Removal

    Extract the cable, and unhook the access cover by pressing the right hinge to the right until it can be lifted up and away from its pivot. Relax the hinge above the pivot. In the same manner, move the left hinge from its pivot point. Lexmark™ E350d, E352dn...
  • Page 79 4512-420, -430 Tilt the front cover down, and disconnect it on the left side from the link. Warning: Make sure that the link is not bent or pulled out farther than normal. Otherwise, the toner cartridge coupler may become dislodged. Remove the front access cover.

  • Page 80: Left Side Cover Removal

    Position the printer with the left rear corner hanging over the edge of the table. Swing the cover open. Lift the top rear of the cover over the pivot point, and drop the cover away from the printer. Lexmark™ E350d, E352dn...

  • Page 81: Right Side Cover Removal

    4512-420, -430 Right side cover removal Remove Tray 1. Open the front access cover. Open the rear door. Release the latches (A), and swing the cover open. Position the printer with the right rear corner hanging over the edge of the table. Lift the top rear of the cover over the pivot point, and drop the cover away from the printer.

  • Page 82: Rear Cover Removal

    Lift the rear cover, unhooking it from the frame at the bottom, and remove. Note: In re-installation, check to make sure that the fuser ground cable is routed out of the way and is not pinched or damaged. Lexmark™ E350d, E352dn...

  • Page 83: Top Cover Removal

    4512-420, -430 Top cover removal “Right side cover removal” on page 4-5. Remove the right side cover. See “Left side cover removal” on page 4-4. Remove the left side cover. See Open the rear door. Remove the two screws (A) from the two front corners on the top cover, the two screws (B) from the two rear corners on the top cover, and the screw (C) on the left side.
  • Page 84 Verify the proper alignment of the top cover with the paper exit guide along the mating edges at the rear of the exit tray. • Verify that the rollers in the top cover contact the exit guide rollers at the top rear. There are arrows under the top cover to verify the location of the rollers. Lexmark™ E350d, E352dn...

  • Page 85: Auto Comp Removal

    4512-420, -430 Auto comp removal “Duplex removal” on page 4-18. Remove the duplex. See See“Auto comp clutch removal” on page 4-10. Remove the auto comp clutch. Use a spring hook or a small screwdriver to rotate the latch toward the bottom of the printer until it is pointing downward.

  • Page 86: Auto Comp Clutch Removal

    Remove the main motor drive. See Remove the screws (A). Note: Resistance to loosening the screw may have to be applied to the shaft. Use a finger or small screwdriver against the coupler behind the clutch. Remove the auto comp clutch. 4-10 Lexmark™ E350d, E352dn...

  • Page 87: Auto Comp Drive Shaft Assembly Removal

    4512-420, -430 Auto comp drive shaft assembly removal “Auto comp clutch removal” on page 4-10. Remove the auto comp clutch. See Use a spring hook or a small screwdriver to dislodge the arm of the shaft bushing, and rotate the arm counterclockwise as far as it will go.

  • Page 88: Bezel Removal

    Open the front access cover. Remove the two screws (A). Lift the lower edge of the shield, slide it to the right, and remove. Release the four inner latches (B). Remove the bezel and lens while the door remains open. 4-12 Lexmark™ E350d, E352dn...

  • Page 89: Controller Card Removal

    4512-420, -430 Controller card removal Warning: • Always touch a ground before touching the card. • Handle the card carefully by the edges. • Never replace the operator panel and controller card at the same time without a successful POR in between.
  • Page 90 Re-installation note: When replacing the controller card, make sure to route all of the cables through the correct shield opening. Make sure that the ground wire that is being held by the front, upper screw is in the correct location before installing. 4-14 Lexmark™ E350d, E352dn...

  • Page 91: Cover Open Sensor Removal

    4512-420, -430 Cover open sensor removal Remove Tray 1. Open the front cover. “Right side cover removal” on page 4-5. Open the right side cover. See steps 1 and 2 of Remove the controller card cover. Loosen the one screw (A) from the shield that protects the sensor. Disconnect the cable from J6 on the controller card.

  • Page 92: Developer Drive Coupling Assembly Removal

    Place the machine on its right side. Note: Be sure to protect the machine from marring. Remove the six screws (A), the machine screw (B), and the ground cable screw (C). Lift the main motor drive, and disconnect the motor cable (D). 4-16 Lexmark™ E350d, E352dn...
  • Page 93 4512-420, -430 Remove the coupling spring (E). Remove the developer drive coupling (F). 4-17 Repair information...

  • Page 94: Duplex Removal

    Remove the screw (C) opposite from screw (B) on the other side of the printer. Note: The ground cable is attached to screw (C). When re-installing, be sure to reconnect the ground cable. “Media level indicator removal” on page 4-33. Remove the media level indicator. See 4-18 Lexmark™ E350d, E352dn...
  • Page 95 4512-420, -430 Remove the six screws (D). Lift the right side (opposite the coupler) and remove the duplex. Note: At re-installation, before tightening the screws, locate the duplex unit against the left side frame. (Left side relative to the picture above.) 4-19 Repair information...

  • Page 96: Duplex Gear Drive

    Remove the duplex coupling and gears (A) (the screw and plastic retainer). Remove the duplex coupling (B) and mating link. Note: The link (not shown) that connects the duplex and duplex coupling is part of this FRU as well as the duplex FRU. 4-20 Lexmark™ E350d, E352dn...

  • Page 97: Fan Removal

    4512-420, -430 Fan removal “Right side cover removal” on page 4-5. Open the right side cover. See steps 2 through 4 of Remove the two screws (A) holding the fan to the side frame. Unplug the cable from J4 on the controller card. Note: Be sure to remove the toroid before removing the cables.

  • Page 98: Fuser Removal

    Remove the two screws (A) and the one machine screw (B) that secures the ground cable. Disconnect the thermistor cable above the fuser. Remove the controller card cover. Disconnect the exit sensor cable from J11 on the controller card. Disconnect the fuser power cable above the fuser. 4-22 Lexmark™ E350d, E352dn...
  • Page 99 4512-420, -430 Unlatch the fuser (see (A) and (B) in the second photo below), and remove. Reinstallation note: • Be sure to reroute the cables back through their retainers. • If the printer has been moved following the removal of the fuser, verify that the cross shaft behind the fuser is in place.

  • Page 100: Fuser Power Cable Removal

    Remove the four screws (A), the machine screw (flange head) (B), and the machine screw (button head) (C). Use the hook end of a spring hook to disconnect the fuser power cable from the LVPS/HVPS side. Note: The connector latch (D) is toward the side frame as shown. 4-24 Lexmark™ E350d, E352dn...
  • Page 101 4512-420, -430 Link developer drive and access door removal “Main motor drive removal” on page 4-28. Remove the main motor drive. See “Developer drive coupling assembly removal” on page 4-16. Remove the coupling assembly. See “Front access cover removal” on page 4-2.
  • Page 102 Remove the four screws (A), the machine screw (B) and the machine screw (C). Unhook the red cable (D) located in the left side frame. Lift the metal cover so the connecting cables (E) and (F) can be unplugged on the side shown. 4-26 Lexmark™ E350d, E352dn...
  • Page 103 4512-420, -430 Rotate the assembly, and unplug the remaining cables. Remove the assembly. Re-installation note: When re-installing the LVPS/HVPS assembly: • Be sure to locate the rear flange of the card bracket inside of the shield prior to rotating the card assembly into final position.

  • Page 104: Main Motor Drive Removal

    IMPORTANT: The ground strap (held by screw B) is not included in the main motor drive FRU. Be sure to remove this strap, and install it in the new drive. Lift the motor end, and disconnect the main motor cable (D). Lift the gear assembly, and remove the developer drive spring (E). 4-28 Lexmark™ E350d, E352dn...
  • Page 105 4512-420, -430 Rotate the motor drive counterclockwise until the two plastic links can be separated. Remove the main motor drive. 4-29 Repair information...

  • Page 106: Manual Feed Sensor Removal

    Hook the spring hook to the connector, and pull it through the opening. • Place the sensor into position, and reconnect the cable on the controller card. • Using the spring hook, be sure to reroute the cable through the three retainers between the sensor and side frame. 4-30 Lexmark™ E350d, E352dn...

  • Page 107: Manual Paper Feed Clutch

    4512-420, -430 Manual paper feed clutch “Left side cover removal” on page 4-4 Open the left side cover. See for more information. Tilt the printer onto its right side, and remove the six screws (A), the screw (B), and the ground cable screw (C).

  • Page 108: Manual Feed Solenoids

    “Main motor drive removal” on page 4-28. Remove the main motor drive. See “Auto comp clutch removal” on page 4-10. Remove the auto comp clutch. See Remove the three screws (A). Remove the manual feed solenoids. 4-32 Lexmark™ E350d, E352dn...

  • Page 109: Media Level Indicator Removal

    4512-420, -430 Media level indicator removal “Left side cover removal” on page 4-4. Remove the left side cover. See Turn the printer onto its top. (Be careful to protect the covers.) Unhook and remove the spring (A). Unhook the link (B) from the indicator level. 4-33 Repair information...
  • Page 110 Unsnap the shaft from its pivot, which is attached to the back of the LVPS/HVPS shield (D). Align the link end of the shaft with the opening in the side frame, and remove the shaft and spring anchor (E). 4-34 Lexmark™ E350d, E352dn...

  • Page 111: Narrow Media Sensor Removal

    4512-420, -430 Narrow media sensor removal “Top cover removal” on page 4-7. Remove the top cover. See Turn the top cover upside down. Remove the ground strap screw (A) and the ground strap. Remove the narrow media sensor. 4-35 Repair information...

  • Page 112: Operator Panel Removal

    Warning: Do not replace the operator panel and the controller card at the same time. Each card contains the printer settings. When either of these cards is new, it obtains its settings from the other card. Critical factory settings are lost when both are new and replaced at the same time. 4-36 Lexmark™ E350d, E352dn...

  • Page 113: Paper Exit Guide Assembly Removal

    4512-420, -430 Paper exit guide assembly removal “Rear cover removal” on page 4-6. Remove the rear cover. See “Top cover removal” on page 4-7. Remove the one screw above the reversing solenoid. See Remove the three screws (A). Lift the back of the top cover (right side in photo) to prevent the gears on the assembly from touching other items while removing, especially the fuser mounting bracket.
  • Page 114 Notice the direction of the points on the edge. Those points should be directed in the paper feed direction as shown. Make sure the new paper feed rollers are captured between the rims of the plastic hub. If the orientation is questionable, run Print Quality sheets, and check for skew. 4-38 Lexmark™ E350d, E352dn...
  • Page 115 4512-420, -430 Paper input and duplex sensor removal “Duplex removal” on page 4-18. Remove the duplex unit. See Remove screws (A) holding the two sensors. Remove the sensor assembly. Note: Be sure to secure cables in retainers when installing the new assembly. The solenoid cable should be installed on top of the sensor cables.

  • Page 116: Printhead Removal

    Be sure to place the toroid back over the cables. • “Printhead assembly mechanical adjustment” on Mechanically adjust the printhead, if necessary. See page 4-13. • “Printhead assembly electronic Electronically adjust the printhead. This is a necessary step. See adjustment” on page 4-8. 4-40 Lexmark™ E350d, E352dn...

  • Page 117: Reversing Solenoid Removal

    4512-420, -430 Reversing solenoid removal “Top cover removal” on page 4-7. Remove the top cover. See “Right side cover removal” Remove the controller card shield. (Loosen the four screws, and slide.) See on page 4-5. Disconnect the cable from J9 (DP REV SOL) on the controller card. Remove the two screws (A).

  • Page 118: Transfer Roll Removal

    If the old springs are moved, feel the base of the springs to assure that they are on the posts. The top of the springs must be captured in the bearings of the transfer roll. 4-42 Lexmark™ E350d, E352dn...

  • Page 119: Tray 2 Auto Comp Tire Removal

    4512-420, -430 Tray 2 auto comp tire removal Gently pull the rubber tire loose from the wheel, and replace it with a new tire. Note: Look at the nap of the tire, and orient the tire for highest friction when picking the paper. 4-43 Repair information...

  • Page 120: Upper Front Frame Group Removal

    Lift the right side to align the flat on the guide shaft with the opening. Slide the shaft through the opening. Slide the cover to the right to free the left side, and remove the front cover guide. 4-44 Lexmark™ E350d, E352dn...
  • Page 121 4512-420, -430 Installation note: Move the printer so the front hangs over the front edge of the work surface. Anchor the left spring on its rear post and maintain tension on it while snapping the assembly into position on the left side. Use the spring hook from below the printer to anchor the front of the spring.
  • Page 122 Use a spring hook to unfasten each of the anchors on the back of each strip. Remove the strip from inside the tray. Wear strip removal (tray 2) Pull up the strip with the spring hook to free it at the top. Lift the strip out. 4-46 Lexmark™ E350d, E352dn...
  • Page 123 4512-420, -430 Note: When replacing the strip: • Push the strip up with your thumb to make sure that the strip is in place. • Turn the tray over so that you are looking at the bottom of the strip. Using the spring hook, check to make sure that the end of the strip is secure and the strip is fastened tightly.
  • Page 124 4512-420, -430 4-48 Lexmark™ E350d, E352dn...

  • Page 125: Locations And Connections

    4512-420, -430 5. Locations and connections Locations Front view Rear view Locations and connections...

  • Page 126: Controller Card Connector Pin Values

    24 V dc Reversing solenoid Less than 1 V dc Less than 5 V dc Narrow media sensor 5 V dc Ground Less than 5 V dc Exit sensor 5 V dc Ground 5 V dc Thermistor Ground Lexmark™ E350d, E352dn...
  • Page 127 4512-420, -430 Connector Pin # Value Value Comments cableplugged cable unplugged (if different) 5 V dc LSU (HSYNC) 2, 3 Signal Ground Signal 3.2 V dc Main motor Ground 5 V dc 24 V dc Less than 24 V dc Signal LVPS/HVPS Ground...

  • Page 128: Connectors

    4512-420, -430 Connectors System board Connector Pin no. Signal J1 USB Port Ground USB +5 V dc USB D- USB D+ Ground Ground Lexmark™ E350d, E352dn...

  • Page 129: Preventive Maintenance

    Damaged, missing, or altered covers, especially in the area of the top cover and the power supply cover • Possible safety exposure from any non-Lexmark attachments Lubrication specifications FRUs are typically lubricated as needed from the factory. If not, lubricate only when parts are replaced or as needed, not on a scheduled basis.
  • Page 130 4512-420, -430 Lexmark™ E350d, E352dn...

  • Page 131: Parts Catalog

    • PP: (Parts Packet) in the parts description column indicates the part is contained in a parts packet. • Model information used in the parts catalog. Machine type Description and model 4512-420 Lexmark E350d 4512-430 Lexmark E352dn Parts catalog...
  • Page 132 4512-420, -430 Assembly 1: Covers Service Manual...
  • Page 133 4512-420, -430 Assembly 1: Covers Asm- Part Units/ Units/ Description Index number mach 1—1 40X2835 Top cover assembly (includes narrow media sensor) 40X2812 Top cover right flag 40X2839 Rear upper and lower cover assembly 40X2858 Legal extender dust cover 40X2837 Right side cover 40X2843 Optional media drawer assembly...
  • Page 134 4512-420, -430 Assembly 2: Electronics Service Manual...
  • Page 135 4512-420, -430 Assembly 2: Electronics Asm- Part Units/ Units/ Description Index number mach 2–1 40X2803 LSU, E350d/E352dn (printhead) 40X2800 Fuser assembly, 110 V 40X2801 Fuser assembly, 220 V 40X2802 Fuser assembly, 100 V 40X2833 Miscellaneous cable assemblies Thermistor LVPS/HVPS to controller card Main drive gear assembly (motor to controller card) Fuser power (LVPS to fuser) 40X2823...
  • Page 136 4512-420, -430 Assembly 3: Frame Service Manual...

  • Page 137: Index

    4512-420, -430 Assembly 3: Frame Asm- Part Units/ Units/ Description Index number mach 3–1 40X2834 Media exit guide assembly 40X2822 Transfer roll, bearings, gear, spring (CBM) 40X2858 Legal extender dust cover 40X2850 Screws, miscellaneous TP2NCX3X6PF-Ni TP2C-4.0+8PF-Ni M3.0*0.5+6PF-Ni M3.0*0.5+4PF-Ni M3.5*0.6+6P-Ni 40X2853 ACM drive shaft assembly 40X2841 Complete duplex assembly...
  • Page 138 4512-420, -430 Assembly 4: Options Asm- Part Units/ Units/ Description Index number mach 40X1512 Japanese font card assembly 40X1513 Simplified Chinese font card assembly 40X1514 Traditional Chinese font card assembly 40X1515 Korean font card assembly 40X1364 32MB SDR DIMM 40X1365 64MB SDR DIMM 40X1366 128 MB SDR DIMM...
  • Page 139 4512-420, -430 Assembly 5: Power cords Asm- Part Units/ Units/ Description Index number mach 40X0289 Power cord, 1.8M (straight)—USA, Canada 40X0278 Power cord, 6 foot (straight)—Europe and others 40X0288 Power cord, 8 foot (straight)—Argentina 40X0271 Power cord, 8 foot (straight)—United Kingdom 40X0275 Power cord, 6 foot (straight)—Israel 40X0274...
  • Page 140 4512-420, -430 7-10 Service Manual...
  • Page 141 4512-420, -430 Index Input Tray Tests 3-17 Feed Tests abbreviations 3-18 Sensor Test acronyms 4-38 menu list autocompensator tires Print Tests 3-14 input source 3-14 input source tests cables 3-14 4-24 Prt Quality Pgs fuser power cable 3-21 Printer Setup Charge Roll, diagnostics mode 3-20 Configuration ID...
  • Page 142 2-21 paper feed PPDS emulation 2-21 3-21 paper jam during POST Print Contrast 2-22 paper never picks print media 2-22 paper picks but stops preventing jams 2-21 paper picks during POST trays by model types and sizes Lexmark™ E350d, E352dn...
  • Page 143 4512-420, -430 2-22 paper picks sheets 2-23 paper trees, curls 2-23 parallel port 2-24 print quality 2-25 black page 2-24 blank page 2-25 heavy background 2-26 image density 2-27 light print 2-26 partial blank image 2-26 poor fusing of image 2-27 toner on back of page 2-27...
  • Page 144 4512-420, -430 Lexmark™ E350d, E352dn...

  • Page 145: Part Number Index

    4512-420, -430 Part number index 40X0270 Power cord, 1.77M (straight)—Japan - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 40X0271 Power cord, 6 foot—United Kingdom - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 40X0274...
  • Page 146 4512-420, -430 40X2834 Media exit guide assembly - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 40X2835 Top cover assembly (includes narrow media sensor) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 40X2836...
  • Page 148 Print defects guide Page 1 of 1 Print defects guide Defects often repeat down a page. In such cases, matching the defect frequency to one of the sets of vertical lines below can help identify the particular part that may be causing the defect. For example, the distance between these two marks represents a repeating defect caused by the toner cartridge.

This manual is also suitable for:

E352dn - e 352dn b/w laser printerE350dE352dn

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