Lexmark C734dn Service Manual page 148

5026
Step Questions / actions
Measure the resistance across fuses F12 (A)
3
and F13 (B)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.
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
Service Manual
2-112
4-82.
Yes
Replace the system board.
See
"System board
removal" on page 4-153.
Replace the transport
motor cable. See
"Transport cable
removal" on page 4-170.
Replace the motor driver
card. See
"Motor driver
card removal" on
page 4-114.
Problem resolved.
No
Go to step 4.
Go to step 5.
Go to step 6.
Replace the system board.
See
"System board
removal" on page 4-153.
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