Lexmark X940e Owners Manual
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Repair information4-89 7510 Go Back Previous Next 13. Remove the NVM board (D) from the upper printer engine card assembly (B). A B C D BBottom view
4-90Service Manual 7510 Go Back Previous Next Upper printer engine card assembly re-installation 1. Install the NVM board from the defective PCBA to the replacement PCBA. Warning: Ensure that the NVM board (D) is installed on the new upper printer engine card assembly, or the machine may not function properly. 2.Install the replacement upper printer engine card assembly to the machine. Warning: Ensure that the bridge card assembly and the lower printer engine card are connected. 3.Turn on the machine. Note: If an 84.xx error occurs, it means that the NVM board was incorrectly installed. Make sure that the NVM board installed is the old NVM board from the defective upper printer engine card. 4.Perform color registration adjustment. Lower printer engine card bracket 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 fifteen connectors from the lower printer engine card bracket assembly (A). 5. Remove the harnesses from the clamps. 6. Remove the two screws securing the lower printer engine card bracket assembly (A) to the machine. Note: When removing the lower printer engine card bracket assembly (A), the lower printer engine card assembly (B) and the upper printer engine card assembly (C) will become detached. 7. Move the lower printer engine card bracket assembly (A) down. WARNING Failure to perform this procedure correctly may cause: • damage to the replacement PCBA • loss of memory settings D BBottom view
Repair information4-91 7510 Go Back Previous Next 8. Remove the lower printer engine card bracket assembly (A). Lower printer engine 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 lower printer engine card bracket assembly. See “Lower printer engine card bracket assembly removal” on page 4-90. 5. Remove the three screws securing the lower printer engine card assembly (A) to the lower printer engine card bracket assembly (B). 6. Release the two plastic retainers with needle nose pliers securing the lower printer engine card assembly (A) to the lower printer engine card bracket assembly (B). Connectors ClampsConnectorsConnectors Clamp AC Connector B
4-92Service Manual 7510 Go Back Previous Next 7. Remove the lower printer engine card assembly (A). Transfer belt drive motor cooling fan 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. Disconnect the connector from the transfer belt drive motor cooling fan (A). 5. Remove the harness clamp from the transfer belt drive motor cooling fan (A). 6. Remove the two screws securing the transfer belt drive motor cooling fan (A) to the machine. 7. Remove the transfer belt drive motor cooling fan (A). B A Clamps A Connector
Repair information4-93 7510 Go Back Previous Next Transfer belt 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 transfer belt drive motor cooling fan. See “Transfer belt drive motor cooling fan removal” on page 4-92. 5. Disconnect the connector from the transfer belt drive motor assembly (A). 6. Remove the transfer belt drive motor assembly (A). Switch (transfer belt access door interlock) 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 transfer belt drive motor cooling fan. See “Transfer belt drive motor cooling fan removal” on page 4-92. 5. Disconnect the connector from the switch (transfer belt access door interlock) (A). 6. Release the hooks securing the switch (transfer belt access door interlock) (A) to the machine.
4-94Service Manual 7510 Go Back Previous Next 7. Remove the switch (transfer belt access door interlock) (A). Laser diode power 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 lower printer engine card bracket assembly. See “Lower printer engine card bracket assembly removal” on page 4-90. 5. Disconnect the connector from the laser diode power card assembly (A). 6. Release the four plastic supports with needle nose pliers. A Connector
Repair information4-95 7510 Go Back Previous Next 7. Remove the laser diode power card assembly (A). 24V LVPS card bracket 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 rear left middle cover. See “Rear left middle cover removal” on page 4-6. 4. Disconnect the four connectors from the 24V LVPS card bracket assembly (A). 5. Remove the harnesses from the clamps. 6. Remove the five screws securing the 24V LVPS card bracket assembly (A) to the machine. 7. Remove the 24V LVPS card bracket assembly (A). Clamps ConnectorClamp ConnectorConnectors A
4-96Service Manual 7510 Go Back Previous Next 24V LVPS card assembly removal 1. Disconnect the three connectors from the 24V LVPS card assembly (A). 2. Remove the three screws securing the 24V LVPS card assembly (A). 3. Remove the 24V LVPS card assembly (A). 5V LVPS card bracket 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. Disconnect the six connectors from the 5V LVPS card bracket assembly (A). A
Repair information4-97 7510 Go Back Previous Next 6. Release the harnesses from the clamps. 7. Remove the four screws securing the 5V LVPS card bracket assembly (A) to the machine. 8. Remove the 5V LVPS card bracket assembly (A). 5V LVPS 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 lower printer engine card bracket assembly. See “Lower printer engine card bracket assembly removal” on page 4-90. 5. Remove the 5V HVPS card bracket assembly. See “5V LVPS card bracket assembly removal” on page 4-96. 6. Remove the four screws securing appropriate 5V LVPS card assembly (A) to the 5V HVPS card bracket assembly.
4-98Service Manual 7510 Go Back Previous Next 7. Remove the appropriate 5V LVPS card assembly (A). 24V LVPS cooling fan 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 rear left middle cover. See “Rear left middle cover removal” on page 4-6. 4. Remove the 24V LVPS card bracket assembly. See “24V LVPS card bracket assembly removal” on page 4-95. 5. Disconnect the connector from the 24V LVPS cooling fan (A). 6. Remove the two screws securing the 24V LVPS cooling fan (A) to the 24V LVPS card bracket assembly (B). 7. Remove the 24V LVPS cooling fan (A). Replacement warning: When replacing the 24V LVPS cooling fan (A), ensure that the label is facing up. A Connector