Xerox Phaser 4500 Service Manual page 234

Print-Quality Troubleshooting
5-18
Blank Prints Troubleshooting Procedure (continued)
Step Actions and Questions
1. Install a new print cartridge.
3
2. Print a test print as in Step 1.
Is there a normal image on the
paper?
1. Remove the print cartridge.
4
2. Inspect the Metal Grounding
Contact on the print cartridge
Right Side Guide.
Is the Metal Grounding Contact
intact and free of contamination?
Check for continuity between the
5
Metal Grounding Contact and the
printer frame.
Is there continuity between the
Grounding Contact and the
printer frame?
6 Is the transfer roller intact and
free of contamination?
7 1. Generate a test print as in Step
1 and switch the printer power
OFF halfway through the print
cycle.
2. Carefully remove the print
cartridge and inspect the toner
image on the drum just before
the transfer area (transfer
roller).
Is the image on the drum
completely developed with
sharp, black, easy-to-read
areas?
8 Replace in order until the problem
is solved:
HVPS/Engine Logic PWB
(page 8-73))
Laser Assembly (page 8-38)
transfer roller assembly
(page 8-45)
LVPS PWB (page 8-62)
Print cartridge Right Side Guide
(page 8-47)
Yes No
Problem solved. Go to step 4.
Go to step 5. Reform or clean the
Metal Grounding
Contact, so they
make better contact
with the drum shaft,
or replace the print
cartridge right guide
(page 8-47).
Go to step 6. Replace the print
cartridge right guide
(page 8-47).
Go to step 7. Replace the transfer
roller assembly
(page 8-45).
Go to step 8. Go to "HVPS/Engine
Logic Board" on
page 4-32.
Phaser 4500/4510 Service Manual