Xerox 4400DT - Phaser B/W Laser Printer, Руководство по обслуживанию, Страница: 174 / 503

Phaser 4400 Laser Printer Service Manual 3-77
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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 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.
Background Troubleshooting Procedure
Step Actions and Questions Yes No
1 1. Install a new Print Cartridge.
2. Print a Test Print.
Is the background gone?
Problem
solved. Go to step 2.
2 1. Generate a Test Print and switch OFF the printer
power 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).
Are the undeveloped areas of the drum clean
and without background?
Go to step 3. Go to
High-Voltage
Power
Supply
(HVPS)
Assembly
on
page 3-31.
3 Clean or replace the Fuser Assembly ( page 6-66 ).
Is the background is gone?
Problem
solved. Go to step 4.
4 Replace the following, in order, until the defective
component is found:
■
HVPS PWB (RRP 9.6 on page 6-92 )
■
Fuser Assembly (RRP 6.2 on page 6-66 )
■
Transport Chute Assembly (RRP 6.1 on page 6-65 )
■
Laser Assembly (RRP 7.4 on page 6-82 )
■
Print Cartridge Side Guide (RRP 7.5 on page 6-83 )
■
Engine Logic Board (RRP 9.3 on page 6-89 ).