5-46 Phaser 6280 Color Laser Printer Service Manual
Print-Quality Troubleshooting
Background Contamination
There is toner contamination on all or most of the page. The contamination
appears as a very light gray dusting.
Initial Actions
â– Check the paper transfer path.
â– Ensure there are no debris on the transfer path.
Troubleshooting Reference Table
Applicable Notes Example Print
â– Transfer Unit, PL4.1.1
â– Print Cartridge (C/M/Y/K),
PL5.1.18-21
â– MCU Board, PL9.1.20
â– Image Processor Board, PL9.1.27
Troubleshooting Procedure Table
Step Actions and Questions Yes No
1 1.Print a page including color
photograph. If not possible, perform
CMY20% Test Print: Service Mode
> Test Print > CMY 20% ESS.
2.Does the image quality improve?
Complete. Go to step 2.
2 1. Check the Print Cartridge (C/M/Y/K)
for damages.
2.Is the Print Cartridge damaged?
Go to step 3. Replace the
Print Cartridge
(
page 8-10).
3 1. Check the Transfer Unit.
2.Are there any damages on the
Transfer Unit surface?
Replace the
Transfer Unit
(
page 8-8).
Go to step 4.
4 1. Check the Transfer Unit for correct
installation. Reseat the Transfer Unit
(page 8-8).
2.Does the image quality improve?
Complete. Go to step 5.
Background Contamination