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Samsung ML-1440 Service Manual

Repair manual
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SERVICE
LASER PRINTER
LASER PRINTER
ML-1440
Manual
CONTENTS
1. Precautions
2. Specifications
3. Disassembly and Reassembly
4. Troubleshooting
5. Exploded Views and Parts List
6. Block Diagram
7. Connection Diagram

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Summary of Contents for Samsung ML-1440

  • Page 1 LASER PRINTER ML-1440 SERVICE Manual LASER PRINTER CONTENTS 1. Precautions 2. Specifications 3. Disassembly and Reassembly 4. Troubleshooting 5. Exploded Views and Parts List 6. Block Diagram 7. Connection Diagram...
  • Page 2 This service manual is also provided on the web, © Samsung Electronics Co.,Ltd. JUNE 2002 the ITSELF system f Samsung Electronics Co., Ltd. Printed in Korea. “http://itself.sec.samsung.co.kr” VERSION NO. : 1.02 CODE : JC-0066A...
  • Page 3 Copyright Act. Specifications are subject to change without prior notice. Samsung Electronics Digital Printing CS Group Copyright (c) 2002. 6.
  • Page 4 Repair Manual Repair Manual SAMSUNG LASER PRINTER ML-1450Series ML-1440 CONTENTS 1. Block Diagram 2. Connection Diagram 3. Schematic Diagrams...
  • Page 5 Electronics...
  • Page 6 This manual is made and described centering around circuit diagram and circuit description needed in the repair center in the form of appendix. Samsung Electronics Digital Printing CS Group Copyright (c) 2002. 1...
  • Page 7 BLOCK DIAGRAM 1. Block Diagram Repair Manual Samsung Electronics...
  • Page 8 53- N .C., 54- N .C., 55 - / EIRQ1, 56- GN D 5, 5 7- N .C ., 4Pin 4 Pin 58- 5V , 59 - 5V , 60 - 5V (60 pi n Connec t or) USB Jack Repair Manual Samsung Electronics...
  • Page 9 SCHEMATIC DIAGRAMS 3. Schematic Diagrams 3-1 Main Circuit Diagram (1/6) Repair Manual Samsung Electronics...
  • Page 10 SCHEMATIC DIAGRAMS Main Circuit Diagram (2/6) Repair Manual Samsung Electronics...
  • Page 11 SCHEMATIC DIAGRAMS Main Circuit Diagram (3/6) Repair Manual Samsung Electronics...
  • Page 12 SCHEMATIC DIAGRAMS Main Circuit Diagram (4/6) Repair Manual Samsung Electronics...
  • Page 13 SCHEMATIC DIAGRAMS Main Circuit Diagram (5/6) Repair Manual Samsung Electronics...
  • Page 14 SCHEMATIC DIAGRAMS Main Circuit Diagram (6/6) Repair Manual Samsung Electronics...
  • Page 15 SCHEMATIC DIAGRAMS 3-2 Engine Circuit Diagram (1/2) Repair Manual Samsung Electronics...
  • Page 16 SCHEMATIC DIAGRAMS Engine Circuit Diagram (2/2) Repair Manual Samsung Electronics...
  • Page 17 SCHEMATIC DIAGRAMS 3-3 SMPS Circuit Diagram Repair Manual Samsung Electronics...

  • Page 18: Block Diagram

    PA CS1284 93C66 P1284 N et w or k SM PS EEPROM - 5V H eat Lamp 2 4 V IEEE1 2 84 U SB Ex it Sensor Panel L SU H V PS Inlet Pow er Ass'y Cord Samsung Electronics...
  • Page 19 PA CS1284 93C66 P1284 N et w or k SM PS EEPROM - 5V H eat Lamp 2 4 V IEEE1 2 84 U SB Ex it Sensor Panel L SU H V PS Inlet Pow er Ass'y Cord Samsung Electronics...

  • Page 20: Table Of Contents

    5. Exploded Views and Parts List The material codes mentioned in themanual are subject to change without prior notice. For the latest exact information, see ITSELF SYSTEM. (http://itself.sec.samsung.co.kr) 5-1 Main Assembly Exploded view ........................ page(5-2) 5-2 Top Assembly Exploded view ........................page(5-4) 5-3 Frame Assembly Exploded view ......................

  • Page 21: Main Assembly Exploded View

    Exploded Views and Parts List 5-1 Main Assembly Exploded view 22-1 22-1 26-7 26-6 26-3 26-1 26-5 26-4 26-7 26-2 Samsung Electronics...
  • Page 22 PMO-COVER CONTROLLER JC72-00358A MEA UNIT-MP TRAY JC97-01325A 26-1 PMO-COVER MP 26-2 NPR-BADGE BRAND 26-3 PMO-TRAY EXTENTION MP 26-4 PMO-TRAY HOLDER MP 26-5 IPR-GUIDE LATCH 26-6 PMO-SIDE GUIDE MP 26-7 PMO-TRAY LINK MP O: Service available X: Service not available Samsung Electronics...

  • Page 23: Top Assembly Exploded View

    Exploded Views and Parts List 5-2 Top Assembly Exploded view Samsung Electronics...
  • Page 24 PBA SUB-PANEL_II PMO-SUPPORT MAIN PMO-STOPPER_EXIT,P PMO-COVER REAR PMO-STACKER REAR IPR-SPRING LOCKER REAR SCREW-TAPTITE O: Service available X: Service not available ELA HOU-COVER MAIN Model SEC.Code Model SEC.Code ML-1440/XAA JC96-02269F ML-1440/XEU JC96-02269F ML-1440/XAC JC96-02269F ML-1440/XEV JC96-02269U ML-1440/XAP JC96-02269W ML-1440/XIL JC96-02269P ML-1440/XAX...

  • Page 25: Frame Assembly Exploded View

    15-1 15-2 15-3 19-2 16-1 19-1 16-2 16-3 16-4 14 13 18-1 18-2 22-1 22-2 22-4 22-3 30-1 30-2 31-3 31-2 49-2 49-3 49-1 24-1 30-3 24-2 31-1 32-2 25-1 32-1 25-2 28-2 28-1 29-1 29-2 29-3 29-4 Samsung Electronics...
  • Page 26 ELA UNIT-SENSOR DEVE 22-1 PBA SUB-SWITCH 22-2 PMO-HOLDER ACTUATOR 22-3 PMO-ACTUATOR DEVE GROUND FU ELA UNIT-TERMINAL TR S 24-1 ICT-SHAFT HV LARGE 24-2 SPRING-HV LARGE ELA UNIT-TERMINAL TR L 25-1 ICT-SHAFT HV LARGE O: Service available X: Service not available Samsung Electronics...
  • Page 27 CAP CONNECTOR U MEC-ROLLER TRANSFER JC75-10963B GEAR IDLE Z27 RING-CS WASHER-PLAIN IPR-WASHER SPRING SU ELA UNIT-ACTUATOR FEED HAWK14 49-1 PMO-ACTUATOR FEED 49-2 PMO-HOLDER ACTUATOR 49-3 SPRING ETC-FEED HAWK14 PMO-GUIDE_SKEW(12) IPR-TERMINAL TR HAWK O: Service available X: Service not available Samsung Electronics...

  • Page 28: Exit Assembly Exploded View

    Exploded Views and Parts List 5-4 Exit Assembly Exploded view Samsung Electronics...
  • Page 29 GEAR-EXIT/U, ID RING-CS GEAR-IDLE 25 SPRING-F/DOWN PMO-HOLDER EXIT_F/DOWN PMO-ROLLER-EXIT, MAIN PMO-ROLLER-EXIT, FR MEC-BEARING, EXIT RING-C MEA UNIT-ROLL EXIT GEAR-EXIT MEC-BEARING, EXIT RING-C HOLDER LEVER LEVER STACKING GUIDE EXIT RING-C SCREW TAPTITE O: Service available X: Service not available 5-10 Samsung Electronics...

  • Page 30: Fuser Assembly Exploded View

    Exploded Views and Parts List 5-5 Fuser Assembly Exploded view Samsung Electronics 5-11...
  • Page 31 GEAR FUSER, Z32 BUSHING HR-L BUSHING HR-R SPRING-BEARING PR BUSHING PR GUIDE REAR SHAFT EXIT_F/UP BUSHING_TX GEAR-EXIT RUBBER EXIT RUBBER EXIT F/UP ACTUATOR EXIT SPRING-ACTUATOR HOLDER BRUSH BRUSH ANTISTATIC HOLDER SHAFT O: Service available X: Service not available 5-12 Samsung Electronics...

  • Page 32: Rack-Mpf Assembly Exploded View

    Exploded Views and Parts List 5-6 Rack-MPF Assembly Exploded view < Rack-MPF Assembly Parts List > SA. : Service Available DESCRIPTION SEC CODE Q’TY REMARK ELA HOU-MPF JC97-01345A PMO-FRAME_MP PMO-PLATE MANUAL BRACKET-MANUAL SCREW TAPTITE O: Service available X: Service not available Samsung Electronics 5-13...

  • Page 33: Drive Assembly Exploded View

    Exploded Views and Parts List 5-7 Drive Assembly Exploded view 5-14 Samsung Electronics...
  • Page 34 JC96-02058A MOTOR-STEP JC31-00010A IPR-BRKT GEAR IPR-BRKT MOTOR GEAR-RDCN 145-70 GEAR-RDCN 90-24 GEAR-OPC DRV 135 GEAR-OPC DRIVE2 GEAR-FEED DRV GEAR-CLUTCH 56 GEAR-FUSER DRV23 PMO-CLUTCH LEVER SPRING-CLUTCH WASHER-PLAIN MPR-POLYWASHER 8 WASHER-PLAIN SCREW-MACHINE O: Service available X: Service not available Samsung Electronics 5-15...

  • Page 35: Pick-Up Assembly Exploded View

    Exploded Views and Parts List 5-8 Pick-Up Assembly Exploded view 24 25 5-16 Samsung Electronics...
  • Page 36 IPR-GUIDE_FEED PMO-HOUSING P/UP PMO-ROLLER FEED L PMO-ROLLER FEED S PMO-SUB HOLDER FEED PMO-FRAME_FEED PMO-HOLDER FEED(1) PMO-HOLDER FEED(2) PMO-IDLE PICK_UP PMO-ROLL_FEED, DRV 12 RMO-RUBBER PICK_UP RMO-LEVER PICK_UP SPRING PICK UP(12) RING-CS O: Service available X: Service not available Samsung Electronics 5-17...
  • Page 37 Exploded Views and Parts List 5-9 Cassette Unit Exploded view (270) 5-18 Samsung Electronics...
  • Page 38 PMO-HOLDER INDICATOR PMO-INDICATOR EMPTY PMO-LOCKER PLATE SPRING LOCKER PLATE PMO-FRAME LEGAL LABEL(R)-PLATE PMO-REAR GUIDE CST IPR-GUIDE PAPER LABEL(R)-HEIGHT IPR-FINGER PMO-SIDE GUIDE SPRING-KNOCK UP IPR-NOCK UP PLATE PAD KNOCK UP GUIDE-PLATE SCREW O: Service available X: Service not available Samsung Electronics 5-19...

  • Page 39: Troubleshooting

    4-6-2 The printer is not working (2) ..Page(4-27) 4-3-1 Wrong Print Position .......Page(4-13) 4-6-3 Abnormal Printing......Page(4-28) 4-3-2 JAM 0..........Page(4-13) 4-6-4 SPOOL Error ........Page(4-29) 4-3-3 JAM 1..........Page(4-14) 4-3-4 JAM 2..........Page(4-14) 4-3-5 Multi-Feeding........Page(4-15) 4-3-6 Paper rolled in the fuser ....Page(4-15) 4-3-7 OPC ..........Page(4-16) Samsung Electronics...

  • Page 40: How To Use Dcu

    Paper Jam 2 The front part of paper is jammed just after passing through the discharge sensor. Out Bin Full The Out bin is filled with paper. LSU Not Ready LSU Scanner Motor not ready or Hsync signal not output. Samsung Electronics...

  • Page 41: Self Diagnostic Mode

    If you press the button once more, the left LED is on and temperature of the fuser is up to overheat Mode. Hot Burn Test If the [enter] button pressed, the printer is continuously printing without detection. Turn the power off to stop operation. Cleaning Mode Print Mode Print the paper to clean the OPC Drum in the Cartridge. Samsung Electronics...

  • Page 42: Self Test Button

    4-1-5 Paper Path Layout EXIT2 FACE DOWN OUT BIN FULL SEN FACE UP FACE UP CARTRIDGE CARTRIDGE FUSER FUSER FEED SEN FEED SEN EXIT1 EXIT1 IDLE EXIT SEN Pr/R FEED PICK UP EMPTY SEN CASSETTE Samsung Electronics...

  • Page 43: Dcu Panel

    Troubleshooting 4-1-6 DCU Panel DIAGNOSTIC CONTROL UNIT QUICK REFERANCE Samsung Electronics...

  • Page 44: The Cause And Solution Of Bad Image

    4. No. 4. : Open the front cover and check odically at the top of a black image. ribs that corresponds to the position of the voids. Remove if found. 5. If the problems are not solved, replace the developer cartridge. Samsung Electronics...

  • Page 45: Horizontal Black Band

    4. In case of 38.5 mm interval unremovable in 1, take measures as to replace the develop- er cartridge and try to print out. 5. Clean the inside of the set against the paper particles and foreign matter in order not to cause the trouble. Samsung Electronics...

  • Page 46: Light Image

    Digital Printer the bad contacts between power supply connects the engine board and HVPS. in the side of the Developer and charge terminal of HVPS. 3. Replace the HVPS if not solved by the above direction 1 and 2. Samsung Electronics...

  • Page 47: Uneven Density

    3. The up-to-down movement of the trans- 3. Clean the busing part of the transfer roller. fer roller is swift? 4. The HVPS is normal? 4. Replace the Developer if not solved by the (Perform DCU diagnostic code 01~04) above direction 1~3. Samsung Electronics...

  • Page 48: Ghost (1)

    Select 'Thick Mode' on paper type menu from Digital Printer mal paper or transparencies such as OHP, the software application and after using return- Digital Printer higher transfer voltage is required. ing to the original mode is recommended. Digital Printer Digital Printer Digital Printer 4-10 Samsung Electronics...

  • Page 49: Ghost (3)

    2. If the transfer roller is contaminated, satins 2. If the transfer roller is contaminated, run PC on the face of page will occur. Cleaning Mode Print 2 or 3 times. Digital Printer And perform Self-Test 2 or 3 times to remove contamination. Samsung Electronics 4-11...

  • Page 50: Satins On Back Of Page

    Solenoid is normal.(refer to code 06) Digital Printer 3. If not solved by the above directions 1-2, Replace the engine board. 4. Turn the power off, delete the data of PC and try printing again. 4-12 Samsung Electronics...

  • Page 51: The Cause And Solution Of The Bad Discharge

    4. Replace the Housing-Pickup and/or whether the assembly slot between Shaft-Pickup. shaft-pickup and housing-pickup become open or is broken away. 5. If the paper feeds into the printer rand Jam 0 occurs, perform DCU to check feed-sensor of the engine board. Samsung Electronics 4-13...

  • Page 52: Jam 1

    3. Remove the jammed paper after disas- sembling the fuser : Clean the surface of the pressure roller with dry gauze. • Remove the toner particles stained on the rib. • Check the assemblage and perfor- mance of the exit. 4-14 Samsung Electronics...

  • Page 53: Multi-Feeding

    1. Disassemble the fuser, clean the area between the (Background, Hot off set) Heat-roller and Thermistor and remove the foreign matter of the pressure roller. 2. If background appears badly in the printing, fix it by referring to the solutions for background. (See 4-2-8 Background) Samsung Electronics 4-15...

  • Page 54: Opc

    2. How to remove the rolled paper in the OPC. • Remove the paper while turning the OPC against the ongoing direction. • Clean fingerprints on the OPC softly with soft cloth dampened with IPA(Isopropyl Alcohol) or tis- sue. 4-16 Samsung Electronics...

  • Page 55: The Cause And Solution Of The Malfunction

    Check and Cause Solution DCU Mode : Perform DCU diagnostic code 05. If the DCU Replace LSU. error code 95 is displayed, replace LSU. If you cannot solve the problem after you replace LSU, replace the main board. Samsung Electronics 4-17...

  • Page 56: Not Function Of The Gear Of The Fuser Due To Melting Away

    1. Bending or deformation of the actuator of the paper sen- 1. Replace the defective actuator. sor. 2. The function of the engine board is defective Perform. 2. Replace the engine board. DCU mode : Perform DCU diagnostic code 8. 4-18 Samsung Electronics...

  • Page 57: Cover Open

    1. Check the insertion of the Cover Open S/W department in the Main Control board. Perform DCU Connect. mode : If Error state '64' occurs, Check the related codes of the Cover Open Error 2. Replace the Main Control board or Cover Open S/W. Samsung Electronics 4-19...

  • Page 58: Defective Motor Operation

    1. Replace the power supply cord or SMPS. 2. Check the inferiority of LED-Panel on the front-cover if 2. Replace the control board. the LED of Panel does not appear after normal warming- 3. Replace the LED-panel. 4-20 Samsung Electronics...

  • Page 59: Vertical Line Getting Curved

    Solution 1. If the supply of +24v is unstable in the Main Control board 1. Replace LSU. linking with LSU, check drive by DCU Mode: LSU Check -05- LSU Motor on. 2. Replace the Main Control board. Samsung Electronics 4-21...

  • Page 60: Toner Cartridge Service

    4-5 Toner Cartridge Service It is not guaranteed for the default caused by using other toner cartridge other than the cartridge supplied by the Samsung Electronic or caused by non-licensed refill production. 4-5-1 Precautions on Safe-keeping of Toner Cartridge Excessive exposure to direct light more than a few minutes may cause damage to the cartridge.

  • Page 61: Signs And Measures At Poor Toner Cartridge

    (1)Check whether foreign sub- stances or toner are stuck to the terminal (contact point) of the developer. (2)Check whether the state of the terminal assembly is normal. 3. If it cannot be recycled: Replace the developer. Samsung Electronics 4-23...
  • Page 62 (1)It occurs when the developer the developer. is recycled over 2 times. (2)Check whether the state of (2)If toner nearly being expired the terminal assembly is nor- are collected to use, it is mal. judged as the recycled devel- oper. 4-24 Samsung Electronics...
  • Page 63 Clean the terminals of the (point of contact) of the developing roller, then recheck it. developer and the state of assembly. (Especially check the devel- oping roller terminal.) Samsung Electronics 4-25...

  • Page 64: The Cause And Solutions Of Bad Environment Of The Software

    4. If the scanner needs to be connected to the printer, 4. Check if the printer cable is directly connected to periph- first the remove the scanner from the PC to see if the eral devices printer is properly working alone. 4-26 Samsung Electronics...

  • Page 65: The Printer Is Not Working (2)

    Turn the PC and printer off, and reboot the system to print again. If not solved, double-click the printer in my computer If the regular fonts are not printed this time again. the cable must be defective so replace the cable with new one. Samsung Electronics 4-27...

  • Page 66: Abnormal Printing

    3. Delete the unnecessary files to secure enough (The printing job sometimes stops or due to insufficient space of the hard disk and start printing job again. virtual memory, but it actually comes from the insuffi- cient space of the hard disk.) 4-28 Samsung Electronics...

  • Page 67: Spool Error

    Before choosing the document, the menu is still inactive. Or put the document out of the list and repeat the routine as in the above or finish the spool manager. Samsung Electronics 4-29...

  • Page 68: Disassembly And Reassembly

    Many of the parts are held in place with plastic latches. The latches break easily; release them carefully. To remove such parts, press the hook end of the latch away from the part to which it is latched. Samsung Electronics...

  • Page 69: Transfer Roller

    Disassembly and Reassembly 3-2 Transfer Roller 1. Open the printer cover. 3. Hold the cap at the both end of the roller, then remove the roller. 2. Remove the cap. Samsung Electronics...

  • Page 70: Controller Board

    Disassembly and Reassembly 3-3 Controller Board 1. Remove two screws and remove the controller board. 2. Remove five screws securing the board and unplug all connectors, and then take the controller board out of the printer. Samsung Electronics...

  • Page 71: Pickup Assembly

    3. Check the pickup rubber wear. If the rubber is heavily worn, replace it with a new one. Squeeze this tab to remove the rubber. 2. Take the assembly out. Push the solenoid if you have difficulty to remove the pickup assembly. Samsung Electronics...

  • Page 72: Main Cover

    6. Slide the main cover upward, out of the printer. 3. Open the printer cover, and open the MP tray. Note that the power switch and the power connecter are properly released when you remove the cover. Samsung Electronics...

  • Page 73: Exit Assembly

    -Main Cover (see page 3-5) 2. Remove the exit tray in the direction of arrow. 4. If you want to remove the exit roller, sqeeze the bottom of the roller and take it out. Samsung Electronics...

  • Page 74: Hvps Board

    2. Remove four screws, and remove the LSU. Then unplug two connectors from the LSU. 3-9 HVPS Board 1. Before you remove the HVPS board, you should remove: -Main Cover (see page 3-5) 2. Remove four screws and take the HVPS board out. Samsung Electronics...

  • Page 75: Drive Assembly

    3. If you want to remove the motor from the drive assembly, remove three gold screws securing the motor assembly to the gear bracket. Samsung Electronics...
  • Page 76 2. Remove two screws, and remove the fan. Then unplug one connector. 3-12 Solenoid 1. Before you remove the solenoid, you should remove: -Main Cover (see page 3-5) 2. Remove two screws, and remove the solenoid. Then unplug one connector. Samsung Electronics...

  • Page 77: Fuser Assembly

    Remove two screws and take the halogen lamp out of the fuser assembly. To remove the thermostat from the fuser assembly Remove two screws and take the thermostat out. Note: When you reassemble the halogen lamp, make sure that it is inserted into the slot properly. 3-10 Samsung Electronics...
  • Page 78 To remove the pressure roller from the fuser assembly : Remove the roller. BRKT gear fuser pressure roller 3. Remove two screws and take the cover fuser out. Holder brush ant 4. Remove two screws and take the holder brush ant out. Samsung Electronics 3-11...
  • Page 79 2. Release the latches on the PTL lamp from the MPF ass’y and unplug one connector, then remove the PTL lamp. PTL lamp 3. Remove two screws and raise the guide feed in the direction of arrow. 3-12 Samsung Electronics...
  • Page 80 2. Remove nine screws securing the PCU shield and remove two screws securing the SCF connector, and then take the PCU shield out of the printer. 4. Unplug all connectors from the PCU shield, and remove the shield. Samsung Electronics 3-13...
  • Page 81 To replace the fuser sensor : To replace the actuator empty : Remove two screws and take it out. Take the sensor out while you squeeze the both ends of the sensor. Actuator empty 3-14 Samsung Electronics...
  • Page 82 To remove the transfer guide : 1. Turn the mechanism back and push down the points Remove three screws and take the guide out. as shown to unlatch the actuator feed. 2. Turn the unit over again, and remove the actuator feed. Samsung Electronics 3-15...

  • Page 83: Specifications

    Power PC (66 MHz) Memory 8M (Not Expandable) 4 Mbyte (16M bit x 2 : Program) Flash Memory 512 bytes EEPROM Emulation SPL(Samsung Printer Language) Interface IEEE1284, USB OS Support Windows 95/98/2000/ME/NT/XP Linux(Redhat 6.0 ), iMac(Mac OS 8.0 ) Option...

  • Page 84: Safety Precautions

    14. Use only standard papers, OHP films, and approved envelopes. Feed OHP films though the manual feed slot only. See specifications for approved papers and envelopes. 15. Other than replacing consumables such as paper and toner, refer all questions to qualified service per- sonnel. Samsung Electronics...
  • Page 85 5. Do not force to open or fasten plastic material compo- latch away from the part to nents. which it is latched. 6. Be careful that small parts such as screws should not get in the printer. Samsung Electronics...

  • Page 86: Tools For Troubleshooting

    DCU(Diagnostic Control Unit) Driver Standard: Test equipment to diagnose the Laser Standard: "-" type, "+" type (M3 long, M3 short, printer supplied by Samsung Electronics. M2 long, M2 short). Pinset Standard: For general home use, small type. DVM(Digital Volt Meter) Cotton Swab Standard: Indicates more than 3 digits.

This manual is also suitable for:

Ml-1450 seriesMl-1651nMl-1650

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