Black Prints; Dark Image; Background Contamination - Xerox Phaser 3500 Service Manual

Image Defect

Black Prints

The prints are completely black,
has no visible image.
s3500-045

Dark Image

All areas of the print are too
dark.

Background Contamination

Uniform toner contamination in
non-image area.
s3500-046
Phaser® 3500 Laser Printer Service Manual
Possible Causes
No charge voltage
■
Power Supply Board
■
Print Cartridge
■
Main board
■
Laser is always ON
■
Incorrect Control Panel
■
settings
Print Cartridge
■
Incorrect high-voltage
■
outputs (Developer Bias
voltage)
Laser assembly
■
Media (paper)
■
Operating environment
■
Print Cartridge
■
Transfer Roller
■
Incorrect High Voltage
■
outputs
3-8
image-quality Troubleshooting
Solutions
1. Verify the high-voltage
contacts are operational and
make good contact with the
print cartridge.
2. Replace in the following
order:
Print Cartridge
■
Power Supply Board
■
Main Board
■
Laser Assembly
■
1. Verify Remote Control Panel
setting for the Print Density
menu is not set to "dark."
2. Verify that the high-voltage
contacts are operational and
make good contact with the
print cartridge.
3. Replace the following in
order:
Print Cartridge
■
Power Supply Board
■
Laser assembly
■
1. Verify that paper meets
printer specifications. Print 20
to 30 pages using
recommended paper. If using
recycled paper, try non-
recycled paper.
2. Printer is installed in specified
environment.
3. Replace Print Cartridge.
4. Inspect Transfer Roller for
contamination and good
electrical contact, replace if
required.
5. Clean the Pre-transfer Lamp.
6. Replace Power Supply Board.