One Color Missing; Contaminated Background - Lexmark X925 Service Manual

One color missing

Step Action and questions
1 Are the imaging units (photoconductors) properly
installed?
2 Is the photoconductor lock door properly closed on
both sides?
3
Is the ribbon cable for the missing color's LED
printhead properly connected to the printhead
controller board and LED printhead?
4 Replace the LED printhead. Did this fix the problem?
5 Are the contacts on the HVPS clean?
6 Are the spring contacts on the sub frame damaged?
7 Replace the HVPS. Did this fix the problem?

Contaminated background

Step Action and questions
1 Check the imaging units and toner supplies to see if
they are clean. Are they clean?
2 Check the imaging units for proper connection. Are
they installed properly?
3 Replace the HVPS. Dis this fix the problem?
Yes No
Go to step 2. Reinstall the
imaging units.
Go to step 3. Open and close
the
photoconductor
lock door
ensuring that t is
locked in place
on both ends.
Go to step 4. Properly connect
the ribbon cable
on both ends.
Problem resolved Go to step 5.
Go to step. Clean the
contacts on the
HVPS.
Replace the Go to step 7.
subframe.
Problem Contact your
resolved. second level
support.
Yes No
Go to step 2 Clean the
supplies.
Replace if
needed.
Go to step 3. Reinstall the
imaging units.
Problem resolved Contact your
second level
support.
Diagnostic information
7541-03x
2-5