Lexmark X746de - XX-Scanner Failure-Communication Failure Service Check; Scanner Failure-Carriage Failed to Move Service Check

Diagnostic information 2-105
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842.xx—Scanner Failure—Communication failure service check
843.00—Scanner Failure—Carriage failed to move service check
Step Questions / actions Yes No
1 1. Check the scanner flex cable from the
scanner MDC card to the system board.
2. Remove the left cover. See “Left cover
removal” on page 4-24.
3. Remove the rear frame cover. See “Rear
frame cover removal” on page 4-37.
Are both ends of the cable (A) seated?
Go to step 2. Reseat the scanner flex
cable.
2
Is the scanner flex cable damaged? Replace the scanner flex
cable.
Go to step 3.
3
Replace the scanner MDC card. See
“Scanner ICC cable removal” on
page 4-260.
Is the problem fixed?
Problem resolved. Replace the system board.
See “System board
removal” on page 4-157.
Step Questions / actions Yes No
1 Check the flatbed motor cables. Remove the
flatbed with glass cover. See “Flatbed with
glass cover removal” on page 4-219.
Are either end of the cables (A, B) loose?
Reseat the flatbed motor
cable.
Replace the flatbed
scanner. See “Flatbed
scanner removal” on
page 4-255