Post-Four Toner Sensor Not Connected Error Service Check - Lexmark X746de Service Manual

7526
920.09—POST—Four toner sensor not connected error service check
Step Questions / actions
1. Turn the printer off.
1
2. Remove the rear frame cover. See
frame cover removal" on page
3. Reseat the cable in connector JHVPS1.
Did the error clear?
Check the HVPS cable in connector JHVPS1
2
for pinch points and any other damage to the
cable or connector.
Is the cable damaged?
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 4-110.
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?
Service Manual
2-118
Problem resolved.
"Rear
4-37.
Replace the HVPS cable.
See
supply (HVPS) cable
removal" on page
Go to step 4.
"Left cover
4-24.
Remove the four new toner
level sensors and go to
step 5.
Problem resolved.
"High-voltage
Replace the system board.
See
"High-
removal" on page 4-157
4-112.
Yes
Go to step 2.
Go to step 3.
"High-voltage power
4-112.
Problem resolved.
Replace the failing toner
level sensors. See
level sensor removal" on
page
Go to step 6.
Problem resolved.
"System board
No
"Toner
4-166.
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