Lexmark X940e Owners Manual
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Repair information4-99 7510 Go Back Previous Next Rear lower cooling fan assembly removal 1. Remove the rear cover assembly. See “Rear cover assembly removal” on page 4-5. 2. Remove the rear upper cooling fan bracket assembly. See “Rear upper cooling fan bracket assembly removal” on page 4-111. 3. Remove the developer / transfer roll HVPS card assembly. See “Developer / transfer roll HVPS card assembly removal” on page 4-112. 4. Remove the lower printer engine card bracket assembly. See “Lower printer engine card bracket assembly removal” on page 4-90. 5. Remove the 5V LVPS card bracket assembly. See “5V LVPS card bracket assembly removal” on page 4-96. 6. Disconnect the connector from the rear lower cooling fan assembly (A). 7. Release the harnesses from the clamp. 8. Remove the two screws securing the rear lower cooling fan assembly (A) to the machine. 9. Remove the rear lower cooling fan assembly (A). CMY developer drive motor assembly removal 1. Remove the rear cover assembly. See “Rear cover assembly removal” on page 4-5. 2. Remove the rear upper cooling fan bracket assembly. See “Rear upper cooling fan bracket assembly removal” on page 4-111. 3. Remove the developer / transfer roll HVPS card assembly. See “Developer / transfer roll HVPS card assembly removal” on page 4-112. 4. Remove the lower printer engine card bracket assembly. See “Lower printer engine card bracket assembly removal” on page 4-90. 5. Remove the 5V LVPS card bracket assembly. See “5V LVPS card bracket assembly removal” on page 4-96. 6. Disconnect the connector from the CMY developer drive motor assembly (A). 7. Release the harnesses from the clamps. 8. Remove the two screws securing the CMY developer drive motor assembly (A) to the machine. Connector A
4-100Service Manual 7510 Go Back Previous Next 9. Remove the CMY developer drive motor assembly (A). CMYK PC cartridge drive motor assembly removal Warning: Ensure that all four PC cartridges are concealed from all sources of light, or damage will occur. 1. Remove the four PC cartridges from the machine. 2. Remove the rear cover assembly. See “Rear cover assembly removal” on page 4-5. 3. Remove the rear left middle cover. See “Rear left middle cover removal” on page 4-6. 4. Remove the rear upper cooling fan bracket assembly. See “Rear upper cooling fan bracket assembly removal” on page 4-111. 5. Remove the developer / transfer roll HVPS card assembly. See “Developer / transfer roll HVPS card assembly removal” on page 4-112. 6. Remove the lower printer engine card bracket assembly. See “Lower printer engine card bracket assembly removal” on page 4-90. 7. Remove the 5V LVPS card bracket assembly. See “5V LVPS card bracket assembly removal” on page 4-96. 8. Remove the transfer belt drive motor assembly. See “Transfer belt drive motor assembly removal” on page 4-93. 9. Remove the duplex unit assembly. See “Duplex unit assembly removal” on page 4-10. 10. Remove the fuser unit assembly. See “Duplex controller card assembly removal” on page 4-14. 11. Remove the MPF feed unit assembly. See “MPF feed unit assembly removal” on page 4-8. 12. Remove the developer / transfer roll HVPS card assembly. See “Developer / transfer roll HVPS card assembly removal” on page 4-112. Clamp ConnectorA A
Repair information4-101 7510 Go Back Previous Next 13. Remove the 24V LVPS card bracket assembly. See “24V LVPS card bracket assembly removal” on page 4-95. 14. Remove the CMYK transfer HVPS card assembly. See “CMYK transfer HVPS card assembly removal” on page 4-103 15. Remove the K developer transport drive motor assembly. See “K developer / transport drive motor assembly removal” on page 4-106. 16. Remove the two connectors from the CMYK PC cartridge drive motor assembly (A). 17. Release the hook securing the access cover (B) to the machine. 18. Remove the access cover (B). 19. Remove the two screws securing the socket (C) to the machine. 20. Detach the socket (C) from the machine. Note: The lower left screw can be accessed through the hole in the frame where the socket (B) was detached in step 7. 21. Remove the eight screws securing the CMY PC cartridge drive motor assembly (A) to the machine. 22. When removing the CMYK PC cartridge drive motor assembly (A), ensure none of the harnesses become damaged. 23. Remove the CMYK PC cartridge drive motor assembly (A). Fuser cooling fan removal 1. Remove the rear cover assembly. See “Rear cover assembly removal” on page 4-5. 2. Remove the right cover assembly. See “Right cover assembly removal” on page 4-4. 3. Remove the top cover assembly. See “Top cover assembly removal” on page 4-4 or “Rear cover assembly removal” on page 4-5. 4. Disconnect the connector from the fuser cooling fan (A). 5. Remove the harness from the clamps. 6. Lift the fuser cooling fan (A). Connector A Connector BCScrewdriver access hole
4-102Service Manual 7510 Go Back Previous Next 7. Remove the fuser cooling fan. Main power switch actuator removal 1. Remove the rear cover assembly. See “Rear cover assembly removal” on page 4-5. 2. Remove the right cover assembly. See “Right cover assembly removal” on page 4-4. 3. Remove the top cover assembly. See “Top cover assembly removal” on page 4-4. 4. Remove the screw securing the main power switch actuator (A) to the machine. 5. Release the hook securing the main power switch actuator (A) to the machine. 6. Remove the main power switch actuator (A). A Connector
Repair information4-103 7510 Go Back Previous Next CMYK toner add motor assembly removal 1. Remove the printer front door assembly. See “Printer front door assembly removal” on page 4-3. 2. Remove the front left cover. See “Front left cover removal” on page 4-9. 3. Remove the waste toner cartridge cover. See “Waste toner cartridge cover removal” on page 4-49. 4. Remove the waste toner cartridge sensor assembly. See “Waste toner cartridge sensor assembly removal” on page 4-49. 5. Remove the inner cover. See “Inner cover removal” on page 4-53. 6. Remove the three CMY toner add assemblies. See “CMY toner add assembly removal” on page 4-57. 7. Remove the K toner add assembly. See “K toner add assembly removal” on page 4-58. 8. Remove the rear cover assembly. See “Rear cover assembly removal” on page 4-5. 9. Remove the right cover assembly. See “Right cover assembly removal” on page 4-4. 10. Remove the top cover assembly. See “Top cover assembly removal” on page 4-4. 11. Remove the main power switch actuator. See “Main power switch actuator removal” on page 4-102. 12. Remove the two screws securing the CMYK toner add motor assembly (A) to the machine. 13. Lift the CMYK toner add motor assembly (A) slightly, and pull it towards the front of the machine. 14. Release the harnesses from the clamps. 15. Disconnect the connector from the CMYK toner add motor assembly (A). 16. Release the tabs securing the four sensors (toner RFID) to the assembly. 17. Remove the four sensors (toner RFID). 18. Remove the CMYK toner add motor assembly (A). CMYK transfer HVPS card assembly removal 1. Remove the rear cover assembly. See “Rear cover assembly removal” on page 4-5. 2. Remove the rear upper cooling fan bracket assembly. See “Rear upper cooling fan bracket assembly removal” on page 4-111. 3. Remove the developer / transfer roll HVPS card assembly. See “Developer / transfer roll HVPS card assembly removal” on page 4-112. 4. Remove the rear left middle cover. See “Rear left middle cover removal” on page 4-6. 5. Remove the 24V LVPS card bracket assembly. See “24V LVPS card bracket assembly removal” on page 4-95. 6. Disconnect the two connectors from the CMYK transfer HVPS card assembly (A). 7. Disconnect the four faston connectors from the CMYK transfer HVPS card assembly (A). 8. Remove the two screws securing the CMYK transfer HVPS card assembly (A) to the machine.
4-104Service Manual 7510 Go Back Previous Next 9. Remove the CMYK transfer HVPS card assembly (A). Warning: When reinstalling the CMYK transfer HVPS card assembly (A), ensure that the four high voltage cables are properly hooked up to the CMYK transfer HVPS card assembly (A) or print quality problems will occur.. Printhead assembly removal Warning: When removing the printhead assembly, be careful not to drop it, or damage will occur. Warning: Always perform color registration adjustment when reinstalling the printhead, NVM initialization, or developer interlock plate assembly. 1. Detach the finisher if equipped. Refer to the MFP or the Printer Finisher Service Manual. 2. Remove the base machine from the scanner/ADF stand assembly. 3. Remove the rear cover assembly. See “Rear cover assembly removal” on page 4-5. 4. Remove the right cover assembly. See “Right cover assembly removal” on page 4-4. 5. Disconnect the two connectors from the printhead assembly (A). 6. Release the two frame clamps from the machine. 7. Release the harness from the clamps. 8. Remove the two screws securing the printhead assembly (A) to the machine.
Repair information4-105 7510 Go Back Previous Next 9. Gently pull the printhead assembly (A) from the machine. Replacement warning: When replacing the printhead assembly, perform the color registration (RegCon) setup and adjustment. See “” on page 4-264. Transfer belt waste toner auger assembly removal 1. Remove the transfer belt unit assembly. See “Transfer belt unit assembly removal” on page 4-16. 2. Remove the two screws securing the transfer belt waste toner auger assembly (A). 3. Detach the bushing (B) from the transfer belt waste toner auger assembly (A). 4. Move the transfer belt waste toner auger assembly (A) toward the rear of the machine.
4-106Service Manual 7510 Go Back Previous Next 5. Remove the transfer belt waste toner auger assembly (A) from the machine. K developer / transport drive motor assembly removal 1. Remove the fuser unit assembly. See “Fuser unit assembly removal” on page 4-15. 2. Remove the rear cover assembly. See “Rear cover assembly removal” on page 4-5. 3. Remove the rear left middle cover. See “Rear left middle cover removal” on page 4-6. 4. Remove the MPF feed unit assembly. See “MPF feed unit assembly removal” on page 4-8. 5. Remove the rear upper cooling fan bracket assembly. See “Rear upper cooling fan bracket assembly removal” on page 4-111. 6. Remove the developer / transfer roll HVPS card assembly. See “Developer / transfer roll HVPS card assembly removal” on page 4-112. 7. Remove the 24V LVPS card bracket assembly. See “24V LVPS card bracket assembly removal” on page 4-95. 8. Remove the CMYK transfer HVPS card assembly. See “CMYK transfer HVPS card assembly removal” on page 4-103. 9. Remove the screw securing the bracket (A) to the machine. 10. Remove the bracket (A). 11. Disconnect the four connectors from the K developer transport drive motor assembly (B). 12. Release the harnesses from the clamps. 13. Release the frame clamp from the K developer transport drive motor assembly (B). 14. Remove the five screws securing the K developer transport drive motor assembly (B) to the machine. Warning: The K developer transport drive motor assembly (B) may be difficult to remove; ensure that none of the harnesses become damaged. B A
Repair information4-107 7510 Go Back Previous Next 15. Gently remove the K developer transport drive motor assembly (A). A Connector Frame clamp Connector Clamp ConnectorsClampsClampsB
4-108Service Manual 7510 Go Back Previous Next K developer clutch removal 1. Remove the duplex unit assembly. See “Duplex unit assembly removal” on page 4-10. 2. Remove the fuser unit assembly. See “Duplex controller card assembly removal” on page 4-14. 3. Remove the rear cover assembly. See “Rear cover assembly removal” on page 4-5. 4. Remove the rear left middle cover. See “Rear left middle cover removal” on page 4-6. 5. Remove the MPF feed unit assembly. See “MPF feed unit assembly removal” on page 4-8. 6. Remove the rear upper cooling fan bracket assembly. See “Rear upper cooling fan bracket assembly removal” on page 4-111. 7. Remove the developer / transfer roll HVPS card assembly. See “Developer / transfer roll HVPS card assembly removal” on page 4-112. 8. Remove the 24V LVPS card bracket assembly. See “24V LVPS card bracket assembly removal” on page 4-95. 9. Remove the CMYK transfer HVPS card assembly. See “CMYK transfer HVPS card assembly removal” on page 4-103. 10. Remove the K developer transport drive assembly. See “K developer / transport drive motor assembly removal” on page 4-106. 11. Remove the E-clip securing the shaft (A) to the K developer / transport drive assembly (B). 12. Remove the busing (C). 13. Remove the shaft (A). 14. Disconnect the connector from the K developer clutch (D). Connector