image-quality Troubleshooting
Phaser® 3500 Laser Printer Service Manual
3-8
Black Prints
The prints are completely black,
has no visible image.
■
No charge voltage
■
Power Supply Board
■
Print Cartridge
■
Main board
■
Laser is always ON
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
Dark Image
All areas of the print are too
dark.
■
Incorrect Control Panel
settings
■
Print Cartridge
■
Incorrect high-voltage
outputs (Developer Bias
voltage)
■
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
Background Contamination
Uniform toner contamination in
non-image area.
■
Media (paper)
■
Operating environment
■
Print Cartridge
■
Transfer Roller
■
Incorrect High Voltage
outputs
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.
Image Defect
Possible Causes
Solutions
s3500-045
s3500-046