Xerox 4400DT - Phaser B/W Laser Printer, Руководство по обслуживанию, Страница: 175 / 503

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