Xerox Phaser 4500 Service Manual page 240

Light Prints Troubleshooting Procedure (Continued)
Step Actions and Questions
4 Check for continuity between the
Metal Grounding Contact and the
printer body frame.
Is there continuity between the
Metal Grounding Contact and the
printer frame?
5 Inspect the Laser Beam path
between the Laser Assembly and
the Drum for obstructions.
Is the Laser Beam path free of
obstructions?
6 Is the Transfer Roller intact and
free of contamination?
7 1. Generate a test print and switch
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 Inspect the toner image on the drum
immediately after the transfer area
(Transfer Roller).
Is the toner image on the drum
transferred completely to the
paper?
9 Replace in order until the problem is
solved:
HVPS/Engine Logic PWB
(page 8-89)
Laser Assembly (page 8-46)
Transfer Roller (page 8-55)
Print-Quality Troubleshooting
Yes
Go to step 5.
Go to step 6.
Go to step 7.
Go to step 8.
Go to step 9.
No
Replace the Print
Cartridge Right Guide
(page 8-58).
Clean the Laser
window and remove
any obstructions from
the laser beam path.
Replace the Transfer
Roller (page 8-55).
Go to "HVPS/Engine
Logic Board" on
page 4-35.
Go to "HVPS/Engine
Logic Board" on
page 4-35.
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