Print-Quality Troubleshooting - Xerox Phaser 3425 Service Manual

Print-Quality Troubleshooting

The following table provides examples or descriptions of various image or printing
defects that may be observed in the Phaser 3425 Laser Printer. The table also lists
possible causes and solutions.
Image Defect
No Image/Blank Prints
Prints have no visible
image
Light Prints: All areas
of the print are light
Black Prints: The prints
are completely black,
has no visible image.
Print-Quality Troubleshooting
Possible Cause
Seal tape was not
■
removed from the
cartridge.
Low or no toner
■
Defective ground to
■
the Print Cartridge.
Main Board
■
Incorrect high-voltage
■
output from the Power
Supply Board.
Media (paper)
■
Verify Remote Control
■
Panel settings.
Seal tape was not
■
removed from the
cartridge.
Low toner
■
Transfer Roller
■
Laser contamination or
■
obstruction.
Incorrect high-voltage
■
output.
Low ambient
■
temperature
(<10º C).
No charge voltage.
■
Power Supply Board
Print Cartridge
■
Main board
■
Laser is always on.
■
Solution
Ensure that sealing tape has
■
been removed.
Verify Print Cartridge ground.
■
Verify continuity between the
■
cartridge ground and frame.
Replace in the following order:
■
Print Cartridge
■
Main Board
■
Power Supply Board
■
Laser Assembly
■
Verify paper meets printer
■
specifications. Print 20 to 30
pages using the recommended
paper.
Verify that the Remote Control
■
Panel is not set to Economode or
that Toner Density menu is not
set to "light."
Ensure that the sealing tape has
■
been removed.
Verify low toner warning is not
■
displayed on front panel. Remove
the Print Cartridge and shake,
reinstall or replace.
Inspect the Transfer Roller for
■
contamination and verify high-
voltage contacts. Replace as
required.
Inspect the Laser assembly for
■
any obstructions; clean laser.
Replace the Power Supply Board.
■
Verify the high-voltage contacts
■
are operational and make good
contact with the print cartridge.
Replace in the following order:
■
Print Cartridge
■
Power Supply Board
■
Main Board
■
Laser Assembly
■
5-7