Missing Band, Voids Or Streaks In A Single Color Or All Colors In Direction Of Paper Travel - Xerox phaser 6250 Service Manual

Missing Band, Voids or Streaks in a Single Color or All
Colors in Direction of Paper Travel
There are areas of the image that are extremely light
or missing entirely. These missing areas form bands
that run along the paper from the leading edge to
the trailing edge, in the direction of paper travel.
Troubleshooting Procedure
Step Check
1 Print the 600 x 600 test print and
evaluate the print.
Are there defects in the print?
2 Check for an obstruction in the laser
beam path between the Laser Unit
and the Imaging Unit.
Lay Imaging Unit on it's back with the
IDT Rollers facing up and rotate the
developer gears to remove any loose
toner.
3 Replace the Imaging Unit, PL 9.1.3.
Does the image quality improve if the
Imaging Unit is replaced?
4 Replace the Transfer Roller
PL 8.1.12. Does the imaging quality
improve if the Transfer Roller is
replaced?
5 Replace the Fuser Assembly, PL
8.1.1. Does the image quality
improve if the Fuser is repalced?
6 Replace the Laser Unit, page 8-68.
Does the image quality improve if the
Laser Unit is replaced?
5-18
Yes
Go to Step [2].
Remove the
obstruction or
debris.
Complete
Complete
Complete
Complete
Phaser 6250 Color Laser Printer Service Manual
S6200-274
No
Replace the Image
Processor Board,
page 8-110.
Go to Step 3.
Go to Step 4.
Go to Step 5.
Go to Step 6.
Replace the Engine
Control Board,
page 8-107.