Phaser 4500/4510 Service Manual 5-19
Print-Quality Troubleshooting
Black Prints
A totally black output print. There is toner on the paper with no visible image.
Initial Actions
■ Inspect the printer paper path for foreign
items, such as staples, paper clips, and
paper scraps.
■ Check installation of the print cartridge.
■ Check that the print cartridge ground
contacts (on the right side of the print
cartridge and in the print cartridge Right
Side Guide in the printer) are clean.
■ Ensure the machine covers are in place
and fit well so no outside light can enter
the machine.
Black Prints Troubleshooting Procedures
Step Actions and Questions Yes No
1 1. Install a new print cartridge.
2.Print a test print.
Is the print normal?
Problem
solved.
Go to step 2.
2 Shield half of the window of the Laser
Assembly. Print a test print.
Is the print half white and half black?
Go to Laser
Assembly on
“Laser Unit
Assembly” on
page 8-38.
Go to HVPS/
Engine Logic
Board on
“HVPS/Engine
Logic Board”
on page 4-32.
s4510-039
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