Lexmark X746de Service Manual page 200

7526
Step Questions / actions
Turn the printer off, and then check the
3
continuity of the HVPS cable.
Pin 24
Pin 2
Is there continuity?
Replace the HVPS. See
4
power supply (HVPS) removal" on
page 4-118.
Did this solve the problem?
Print quality—vertical banding
Replace the developer cartridge.
Print quality—white gapping
Step Questions / actions
1. Open the front cover.
1
2. Remove the toner cartridge base on the
color of the print quality defect.
3. Inspect the cartridge guide for damage or
obstructions. Clear any obstructions.
4. Inspect the cartridge guide wheel if its
dislodged or damaged.
Is the cartridge guide wheel damaged?
1. Reinstall all the toner cartridge.
2
2. Ensure that the photoconductor units are
installed correctly.
3. Reseat the photoconductor.
4. Perform a print test.
Does this fix the problem?
1. Reseat JHVPS1 on the system board.
3
2. Reseat the other end of the cable located
on the HVPS.
3. Check for cuts and damage on the HVPS
cable.
Is the HVPS cable damaged?
Service Manual
2-160
Go to step 4.
Pin 1
Pin 23
Pin 2
Pin 1
Problem resolved.
"High-voltage
Replace the cartridge guide
wheel. See
guide wheel removal" on
page
Problem resolved.
Replace the HVPS cable.
See
supply (HVPS) cable
removal" on page
Yes
Replace the cable
assembly.
Pin 23
Pin 24
Replace the system board.
See
removal" on page
Yes
Go to step 2.
"Cartridge
4-55.
Go to step 3.
Go to step 4.
"High-voltage power
4-120.
No
"System board
4-165.
No
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