Lexmark CS748de - XX, 112.XX, 113.XX, and 114.XX-Printhead Error Service Check

2-46 Service Manual
5026
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111.xx, 112.xx, 113.xx, and 114.xx—Printhead error service check
2
Turn the printer off, and then remove the rear
frame cover. See “Rear frame cover
removal” on page 4-47. Check the cable in
connector JMIRR1 for proper connection to
the system board, the printhead cable for
pinch points, and the cable or connector for
any other damage.
Is the cable damaged?
Replace the printhead. See
“Printhead removal,
installation, and
adjustment” on
page 4-153.
Go to step 3.
3
Measure the continuity across all of the fuses
on the system board.
Are any of the fuses blown?
Replace the system board.
See “System board
removal” on page 4-163.
Go to step 4.
4
Perform the printhead verification to check
whether the new printhead will solve the
problem. See “Printhead verification” on
page 3-39.
Perform the Mirror Motor Test. See “Mirror
Motor Test” on page 3-20.
Did the Mirror Motor pass the test?
Replace the printhead. See
“Printhead removal,
installation, and
adjustment” on
page 4-153.
Replace the system board.
See “System board
removal” on page 4-163.
Step Questions / actions Yes No
1 View the Event Log:
1. Turn off the printer, press and hold
buttons 3 and 6, then turn on the printer.
2. Select EVENT LOG.
3. Select Display Log.
Has an 111.xx,112.xx, 113.xx, or 114.xx error
occurred three times or more?
Replace the printhead. See
“Printhead removal,
installation, and
adjustment” on
page 4-153.
Go to step 2.
2
Turn the printer off, and then remove the rear
frame cover. See “Rear frame cover
removal” on page 4-47. Check the cable in
connector JPH1 for proper connection to the
system board, the cable for pinch points, and
the cable or connector for any other damage.
Is the cable damaged?
Replace the 5 V interlock
switch. See “5 V interlock
switch cable removal” on
page 4-61.
Go to step 3.
3
Measure the continuity across all of the fuses
on the system board.
Are any of the fuses blown?
Replace the system board.
See “System board
removal” on page 4-163.
Go to step 4.
4
Perform the printhead verification to check
whether the new printhead solves the
problem. See “Printhead verification” on
page 3-39.
Perform the Servo Laser Test. See “Servo
Laser Test” on page 3-20.
Did the printhead motor pass the test?
Replace the printhead. See
“Printhead removal,
installation, and
adjustment” on
page 4-153.
Replace the system board.
See “System board
removal” on page 4-163.
Step Questions / actions Yes No