Lexmark X746de Service Manual page 161

Step Questions / actions
1. Remove the left cover. See
3
removal" on page
2. Reseat and check all the toner level
sensor cables (A) connected to the rear of
the HVPS for damages and if they are
installed correctly.
Does the problem persist?
Connect four new toner level sensors outside
4
the machine and perform a POR.
Note: Keep track of which sensors change
the error code to reduce the number of failing
sensors. Keep the old sensor which does not
reduce the failing number, leaving three new
sensors and no error reported.
Does the problem persist?
Replace the HVPS board. See
5
power supply (HVPS) removal" on
page 4-118.
Did the error clear?
1. Install the old HVPS back to the machine.
6
2. Replace the HVPS cable. See
voltage power supply (HVPS) cable
removal" on page
Does the problem persist?
Go to step 4.
"Left cover
4-24.
Go to step 5.
Problem resolved.
"High-voltage
Replace the system board.
See
"High-
removal" on page 4-165
4-120.
Yes
Problem resolved.
Replace the failing toner
level sensors. See
level sensor removal" on
page
Go to step 6.
Problem resolved.
"System board
Diagnostic information
7526
Previous
No
Go Back
"Toner
4-174.
2-121
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