Lexmark X940e Owners Manual

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13. Remove the NVM board (D) from the upper printer engine card assembly (B).
A
B
C
D
BBottom view 

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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...

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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....

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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...

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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...

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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...

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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...

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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....

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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...

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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...