Post-Printhead Motor Not Connected Error Service Check; Input Sensor Service Check - Lexmark X746de Service Manual

7526
920.05—POST—printhead motor not connected error service check
Step Questions / actions
1. Turn the printer off.
1
2. Remove the rear frame cover. See
frame cover removal" on page
3. Reseat the cables in connectors JMIRR1
and JPH1.
Did the error clear?
Check the cables in connectors JMIRR1 and
2
JPH1 for pinch points and any other damage
to the cables or connectors.
Is the cable damaged?
Measure the continuity across all of the fuses
3
on the system board.
Are any of the fuses blown?
1. Perform the printhead verification to check
4
whether the new printhead solves the
problem. See
on page 3-52.
2. Perform the Mirror Motor Test. See
"Mirror Motor Test" on page
Did the mirror motor pass the test?
920.06—Input sensor service check
Step Questions / actions
Is the input sensor flag damaged?
1
1. Turn the printer off.
2
2. Remove the rear frame cover. See
frame cover removal" on page
3. Check the cable in connector JTRAY1 for
proper connection to the system board, for
pinch points, and any other damage to the
cable or connector. Check both ends of
the cable.
Is the cable damaged?
Service Manual
2-114
"Rear
4-37.
"Printhead verification"
3-19.
"Rear
4-37.
Yes
Problem resolved.
Replace the printhead. See
"Printhead removal,
installation, and
adjustment" on
page 4-140.
Replace the system board.
See
"System board
removal" on page 4-157.
Replace the printhead. See
"Printhead removal,
installation, and
adjustment" on
page 4-140.
Yes
Replace the paper pick
mechanism. See
"Paper
pick mechanism
assembly removal" on
page 4-130.
Replace the paper pick
mechanism. See
"Paper
pick mechanism
assembly removal" on
page 4-130.
No
Go to step 2.
Go to step 3.
Go to step 4.
Replace the system board.
See
"System board
removal" on page 4-157.
No
Go to step 2.
Go to step 3.
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