Uneven Density - Xerox 4400DT - Phaser B/W Laser Printer Service Manual

Uneven Density

Image density varies within the page in either direction.
Initial Actions
Load fresh dry paper.
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Check that the correct Print Cartridge is properly installed and not empty.
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Ensure that the machine is reasonably level.
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Check to make sure the Laser path is clean and unobstructed.
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Remove the Print Cartridge and check the Left and Right Guides for wear,
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contamination, obstructions, etc.
Clean the Laser window.
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Uneven Density Troubleshooting Procedure
Step Actions and Questions
1 Print a Test Print.
Does the Test Print output image contain
uneven print?
2 1. Install a new Print Cartridge
Xerographics
2. Print a Test Print.
Does the Test Print output image contain
uneven print?
3 Check the Transfer Roller for contamination, even
spring pressure, and proper installation.
Is the Transfer Roller in good condition (not
contaminated) and properly installed?
3-78
(PL 8.1 Drive and
on page 7-20).
Yes
Go to step 2.
Go to step 3.
Go to step 4.
Phaser 4400 Laser Printer Service Manual
No
Go to
Service
Flowchart on
page 2-2.
Problem
solved. Go to
Service
Flowchart on
page 2-2.
Repair or
replace the
Transfer
Roller
Assembly
(RRP 7.1 on
page 6-79).