Xx-Fuser Error Service Check - Lexmark X746de Service Manual

7526
Step Questions / actions
1. Turn the printer off, and then remove the
2
rear frame cover. See
removal" on page
2. 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?
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 Servo Laser Test. See
"Servo Laser Test" on page
Did the printhead motor pass the test?
120.xx—Fuser error service check
Step Questions / actions
Check the input voltage switch on the back of
1
the low-voltage power supply (LVPS).
Note: Some LVPS FRUs do not have a
switch, and are switch automatically. If your
FRU does not have this switch, go to step 2.
Is the voltage level (115 V/230 V) properly
set?
Service Manual
2-48
"Rear frame cover
4-37.
"Printhead verification"
3-19.
Yes
Replace the 5 V interlock
switch. See
"5 V interlock
switch cable removal" on
page 4-48.
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
Go to step 2.
No
Go to step 3.
Go to step 4.
Replace the system board.
See
"System board
removal" on page 4-157.
No
Set the switch for the
proper country voltage.
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