Lexmark X734de Service Manual page 161

Step Questions / actions
Measure the resistance across fuses F12 and
3
F13 on the system board.
Is either fuse blown?
Check the transport motor cable for pinch
4
points and any other damage to the cable or
connector.Check both ends of the cable.
Is the cable damaged?
Visually inspect the motor driver card.
5
Is the motor driver card damaged?
Replace the EP drive assembly. See
6
"Electrophotographic (EP) drive assembly
removal" on page 4-89.
Yes
Replace the system board.
See
"System board
removal" on page 4-165.
Replace the transport
motor cable. See
"Transport cable
removal" on page 4-193.
Replace the motor driver
card. See
"Motor driver
card removal" on
page 4-127.
Problem resolved.
7526
No
Go to step 4.
Go to step 5.
Go to step 6.
Replace the system board.
See
"System board
removal" on page 4-165.
Diagnostic information
2-123
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