Lexmark X940e Owners Manual
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Repair information4-59 7510 Go Back Previous Next Developer interlock plate assembly removal Warning: Always perform color registration adjustment (RegCon) when removing or reinstalling the printhead, NVM initialization, or developer interlock plate assembly. See “” on page 4-264. 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. Note: It is not required to remove the waste toner cartridge sensor assembly; allow it to loosely hang out of the way. 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. Warning: When removing the CMY toner add assemblies, the toner cartridges should be left installed in order to reduce toner spillage. 6. Remove the three CMY toner add assemblies. See “CMY toner add assembly removal” on page 4-57. Warning: When removing the K toner add assembly, the toner cartridge should be left installed in order to reduce toner spillage. 7. Remove the K toner add assembly. See “K toner add assembly removal” on page 4-58. 8. Remove the harnesses from the clamps on the developer interlock plate assembly (A). Shutter A
4-60Service Manual 7510 Go Back Previous Next Warning: Use extreme caution when disconnecting the next seven connectors from the upper harness strip, or damage will occur. 9. Disconnect the seven connectors from the upper harness strip. 10. Remove the six screws securing the developer interlock plate assembly (A) to the machine. 11. Remove the purple harness from the large black plastic clamp on the developer interlock plate assembly (A) Warning: Note the orientation of the four developer unit harnesses and the three erase lamp harnesses to ensure proper reinstallation or damage may occur. 12. Remove the four developer harnesses from the four small plastic clamps on the developer interlock plate assembly (A).
Repair information4-61 7510 Go Back Previous Next 13. While holding the four developer unit assemblies firmly inside the machine, gently remove the developer interlock plate assembly (A). 14. Remove the developer interlock plate assembly (A) and allow it to gently hang down by the harness if removing the developer units. If removing the developer interlock plate assembly (A) from the machine, goes to step 15. 15. Remove the screw securing the harness cover (B) to the machine. 16. Remove the harness cover (B). 17. Disconnect the connector from the developer interlock plate assembly (A).
4-62Service Manual 7510 Go Back Previous Next Replacement note: When replacing the developer interlock plate assembly (A), install the bottom edge first and ensure that all four developer unit assemblies are properly aligned when replacing the developer interlock plate assembly (A). Replacement warning: Ensure that the erase lamp harnesses and developer unit assembly harnesses are correctly installed in the clamps, or they may become detached. Verify that the harnesses are properly secured in the clamps by moving the transfer belt lift handle up and down several times before reinstalling the inner cover. Clamp Erase lamp & developer unit assembly harnesses Clamps
Repair information4-63 7510 Go Back Previous Next Developer unit assembly removal Note: The following procedure can be applied to the C, M, Y, and K developer unit assemblies. Warning: When removing developer unit assemblies, ensure that the area on the floor in front of the machine is protected from toner spillage. Warning: When replacing the developer unit assemblies, ensure that all toner spillage and contamination is removed. Warning: Always perform the sensor (ATC sensor) setup and adjustment if required or print quality problems may occur. Go to “Sensor (ATC) setup” on page 4-260. Warning: Always perform color registration adjustment (RegCon) when removing or reinstalling the printhead, developer unit assembly or developer interlock plate assembly or print quality problems may occur. See “” on page 4-264. 1. Remove the transfer belt assembly. See “Transfer belt unit assembly removal” on page 4-16. 2. Remove the printer front door assembly. See “Printer front door assembly removal” on page 4-3. 3. Remove the front left cover. See “Front left cover removal” on page 4-9. 4. Remove the waste toner cartridge cover. See “Waste toner cartridge cover removal” on page 4-49. 5. Remove the waste toner cartridge sensor assembly. See “Waste toner cartridge sensor assembly removal” on page 4-49. Note: The waste toner cartridge sensor assembly does not need to be removed from the machine. It may be allowed to hang by the wires. 6. Remove the inner cover. See “Inner cover removal” on page 4-53. Warning: When removing the CMY toner add assemblies, the toner cartridges should be left installed in order to reduce toner spillage. 7. Remove the three CMY toner add assemblies. See “CMY toner add assembly removal” on page 4-57. Warning: When removing the K toner add assembly, the toner cartridge should be left installed in order to reduce toner spillage. 8. Remove the K toner add assembly. See “K toner add assembly removal” on page 4-58. 9. Remove the developer interlock plate assembly. See “Developer interlock plate assembly removal” on page 4-59. Note: When removing the developer unit assembly, position it in the way it is removed from the machine, or toner spillage will occur. 10. Ensure the transfer belt lift handle is in the down position and gently remove the appropriate developer unit assembly (A). Note: When removing the developer unit assembly, ensure that it is positioned in the same manner in which it is removed from the machine or spillage will occur.
4-64Service Manual 7510 Go Back Previous Next Warning: Ensure that the harness coupler (B) is removed from the old developer unit assembly (A) and installed on the new one. Note: Installation of a new developer requires installation of the appropriate carrier. See page 4-70 for the instructions on how to install the new carrier. Replacement warning: Ensure that the rear area new developer unit assembly (A) is properly engaged into the machine or the magnetic rolls will not turn properly. Use the following procedure to test for proper magnetic roll engagement immediately after installing the new C, M or Y developer unit assembly (A): CAUTION: When performing motor tests, ensure that all cover and door interlock switches are overridden. •Enter the diagnostic mode. •Touch MOTOR TESTS. •Touch Printer Motor Tests. •Touch CMY developer drive motor (this test will not work for the K developer unit assembly). Warning: If the magnetic roll and the waste auger can be seen turning then the developer unit assembly (A) is installed correctly, if the magnetic roll and the waste auger are not turning, then the developer unit assembly (A) must be reinstalled and the motor test repeated. Warning: When replacing the developer interlock plate assembly, ensure that the erase lamp harnesses and developer unit assembly harnesses are correctly installed in the clamps, or they may become
Repair information4-65 7510 Go Back Previous Next detached. Verify that the harnesses are properly secured in the clamps by moving the transfer belt lift handle up and down several times before reinstalling the inner cover. 11. Perform the ATC sensor setup and adjustment. See “Sensor (ATC) setup” on page 4-260. 12. Perform the color registration (RegCon) setup and adjustment. See “” on page 4-264. 13. Remove the printhead cleaning tool from the printer front door assembly. Clamp Erase lamp & developer unit assembly harnesses Clamps
4-66Service Manual 7510 Go Back Previous Next 14. Clean the four printhead glass windows using the printhead cleaning tool.
Repair information4-67 7510 Go Back Previous Next Developer carrier removal and replacement Note: The following procedure can be applied to the C, M, Y, and K developer carriers. Warning: Always perform the sensor (ATC sensor) setup and adjustment if required or print quality problems may occur. Go to “Sensor (ATC) setup” on page 4-260. Warning: Always perform color registration adjustment (RegCon) when removing or reinstalling the printhead, developer unit assembly or developer interlock plate assembly or print quality problems may occur. See “” on page 4-264. 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. Note: The waste toner cartridge sensor assembly does not need to be removed from the machine. It may be allowed to hang by the wires. 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 developer interlock plate assembly. See “Developer interlock plate assembly removal” on page 4-59 9. Remove the developer unit assembly. See “Developer unit assembly removal” on page 4-63. 10. Using a prying tool, gently release the two hooks securing the top cover (A) to the assembly.
4-68Service Manual 7510 Go Back Previous Next 11. Remove the top cover (A). 12. Completely remove the carrier (B) from the assembly by dumping it and using a toner vacuum or if installing a new developer unit assembly, go to next step.