Lexmark X940e Owners Manual
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Repair information4-69 7510 Go Back Previous Next Replacement warning: If reusing an existing developer unit assembly, ensure that all traces of old carrier (B) are removed from the developer unit assembly, or print quality issues may occur. B
4-70Service Manual 7510 Go Back Previous Next To install the new carrier (B): Warning: Ensure that the carrier is installed evenly and uniformly in the assembly, or spillage may occur. 1. Open the appropriate bag, and dump the appropriate carrier into the appropriate assembly. 2. Rotate the gears in the assembly to evenly distribute the carrier (B). Warning: Ensure that the two seals are properly positioned in the assembly before replacing the top cover (A), or spillage may occur which may lead to print quality problems. Warning: Ensure that the four plastic tabs in the top cover (A), are inserted into the four holes in the developer unit or the carrier (B) will be ejected from the developer unit assembly which will result in carrier contamination and print quality problems. 3. Replace the top cover (A). 4. Perform the ATC sensor setup and adjustment. Go to “Sensor (ATC) setup” on page 4-260. 5. Perform the color registration (RegCon) setup and adjustment. Go to “” on page 4-264. B SealSeal ATabs HookHook
Repair information4-71 7510 Go Back Previous Next Photoconductor (PC) unit assembly removal Warning: Ensure that all four PC cartridges are concealed from all sources of light, or damage will occur. Note: This procedure can be applied to either the C, M, Y, or K PC unit assemblies. 1. Open the printer front door assembly. 2. Press the button on the transfer belt lift latch (A). 3. Raise the transfer belt lift latch (A) to its upper-most position. 4. Lower the transfer belt lift handle (B) to its lower-most position. A B Button
4-72Service Manual 7510 Go Back Previous Next 5. Pull the appropriate PC unit assembly (C) from the machine. Note: When the PC unit assembly (C) is removed, ensure that it is stored in the position as shown in the graphic below. Replacement warning: When replacing the PC unit assembly (C), ensure that the rail on the PC unit assembly (C) is properly inserted into the metal track or physical binding and damage will occur. In the
Repair information4-73 7510 Go Back Previous Next event that the PC unit assembly (C) becomes bound, it can be removed by twisting it in a clockwise direction while pulling it from the machine. Transfer belt lift latch 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 sensor (waste toner cartridge full). See “Sensor (waste toner cartridge full) removal” on page 4-50. 6. Remove the inner cover. See “Inner cover removal” on page 4-53. 7. Remove the two screws securing the transfer belt lift latch (A) to the machine. 8. Release the harnesses from the clamp. Metal track A1 Rail must slide straight into metal track C
4-74Service Manual 7510 Go Back Previous Next 9. Remove the transfer belt lift latch assembly (A). A
Repair information4-75 7510 Go Back Previous Next Transfer belt steering motor removal 1. Remove the front left cover. See “Front left cover removal” on page 4-9. 2. Remove the waste toner cartridge cover. See “Waste toner cartridge cover removal” on page 4-49. 3. Remove the waste toner cartridge sensor assembly. See “Waste toner cartridge sensor assembly removal” on page 4-49. 4. Remove the sensor (waste toner cartridge full). See “Sensor (waste toner cartridge full) removal” on page 4-50. 5. Remove the inner cover assembly. See “Inner cover removal” on page 4-53. 6. Disconnect the connector transfer belt steering motor (A). 7. Remove the three screws securing the transfer belt steering belt motor (A) to the machine. 8. Remove the transfer belt steering motor (A). CMY erase lamp assembly removal Warning: Ensure the transfer belt unit assembly is removed, or damage will occur. 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 sensor (waste toner cartridge full). See “Sensor (waste toner cartridge full) removal” on page 4-50 6. Remove the inner cover. See “Inner cover removal” on page 4-53. 7. Raise the transfer belt lift handle (A) to its upper-most position. 8. Disconnect the connector from the appropriate CMY erase lamp assembly (B). 9. Release the harness from the clamp. 10. Remove the screw securing the appropriate bracket (C) to the machine. 11. Lower the transfer belt lift handle (A) to its lower-most position. Note: Access to the rear mounting hook on the CMY erase lamp (B) can be gained by reaching into the transfer belt unit opening from the right side of the machine. A
4-76Service Manual 7510 Go Back Previous Next 12. Gently raise the rear of the appropriate CMY erase lamp assembly (B) to detach the mounting hook from the machine. 13. Remove the appropriate CMY erase lamp assembly (B). K erase lamp assembly removal Warning: Ensure the transfer belt assembly unit is removed, or damage will occur. 1. Remove the front left cover. See “Front left cover removal” on page 4-9. 2. Remove the waste toner cartridge cover. See “Waste toner cartridge cover removal” on page 4-49. 3. Remove the waste toner cartridge sensor assembly. See “Waste toner cartridge sensor assembly removal” on page 4-49. 4. Remove the sensor (waste toner cartridge full). See “Sensor (waste toner cartridge full) removal” on page 4-50. 5. Remove the transfer belt unit assembly. See “Transfer belt unit assembly removal” on page 4-16. 6. Remove the inner cover. See “Inner cover removal” on page 4-53. 7. Raise the transfer belt lift handle (A) to its upper-most position. 8. Disconnect the connector from the K erase lamp assembly (B). 9. Release the harness from the clamp. 10. Remove the screw securing the bracket (C) to the machine. 11. Lower the transfer belt lift handle (A) to its lower-most position. 12. Access to the rear mounting hook on the K erase lamp (B) can be gained by reaching into the transfer belt unit opening from the right side of the machine. C B A Connector Mounting hook
Repair information4-77 7510 Go Back Previous Next 13. Gently raise the rear of the K erase lamp assembly (B) to detach the mounting hook from the machine. 14. Remove the K erase lamp assembly (B). Connector A B C
4-78Service Manual 7510 Go Back Previous Next Printhead shutter motor assembly 1. Remove the rear cover assembly. See “Rear cover assembly removal” on page 4-5. 2. Remove the rear left middle cover. See “Rear left middle cover removal” on page 4-6. 3. Remove the MPF feed unit assembly. See “MPF feed unit assembly removal” on page 4-8. 4. Remove the printer left door assembly. See “Printer left door assembly removal” on page 4-36. 5. Remove the registration transport roll assembly. See “Registration / transport roll assembly removal” on page 4-46. 6. Disconnect the connector from the printhead shutter motor assembly (A). 7. Remove the two screws securing the printhead shutter motor assembly (A) to the machine. 8. Remove the printhead shutter motor assembly (A) from the machine. Mounting hook B C