Lexmark CS748de User Manual

2-116 Service Manual
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920.23—POST (power-on self test)—Duplex motor not connected error service check
Step Questions / actions Yes No
1 Turn the printer off, and then remove the rear
frame cover. See “Rear frame cover
removal” on page 4-47.
Reseat the cable in connector JDX1.
Does the error clear?
Problem resolved. Go to step 2.
2
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 3.
3
Remove the right cover. See “Right cover
removal” on page 4-51. Check the MPF/
duplex motor cable in connector JDX1 for
pinch points and any other damage to the
cable or connector. Check both ends of the
cable.
Is the cable damaged?
Replace the MPF/duplex
motor cable. See
“Multipurpose feeder
(MPF)/duplex motor
cable removal” on
page 4-136.
Note: Make sure to verify if
the new cable is working
properly first. Route the
cables properly only when
you have verified that the
cables are working
properly.
Go to step 4.
4
1. Replace the MPF/duplex motor assembly.
See“Multipurpose feeder (MPF)/duplex
motor assembly removal” on
page 4-133.
Note: Before replacing a motor, always
verify if the new part is working properly
by connecting it outside of the machine,
2. POR the printer and check if the error is
gone.
Did the error clear?
Problem resolved. Replace the system board.
See “System board
removal” on page 4-163.

Lexmark CS748de Specifications

General

Brand	Lexmark
Model	CS748de
Category	Printer
Language	English