Diagnostic information 2-157
7526
Print quality—vertical banding
Replace the developer cartridge.
Print quality—white gapping
3
Turn the printer off, and then check the
continuity of the HVPS cable.
Go to step 4. Replace the cable
assembly.
Is there continuity?
4
Replace the HVPS. See “High-voltage
power supply (HVPS) removal” on
page 4-120.
Did this solve the problem?
Problem resolved. Replace the system board.
See “System board
removal” on page 4-165.
Step Questions / actions Yes No
1 1. Open the front cover.
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?
Replace the cartridge guide
wheel. See “Cartridge
guide wheel removal” on
page 4-63.
Go to step 2.
2
1. Reinstall all the toner cartridge.
2. Ensure that the photoconductor units are
installed correctly.
3. Reseat the photoconductor.
4. Perform a print test.
Does this fix the problem?
Problem resolved. Go to step 3.
3
1. Reseat JHVPS1 on the system board.
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?
Replace the HVPS cable.
See “High-voltage power
supply (HVPS) cable
removal” on page 4-122.
Go to step 4.
Step Questions / actions Yes No
Pin 24
Pin 23
Pin 1Pin 2
Pin 2
Pin 1
Pin 23
Pin 24
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