Xerox 6200B - Phaser Color Laser Printer Service Manual page 121

Missing Band, Voids or Streaks in a Single Color or
All Colors in Direction of Paper Travel
Step Check
1 Print the 600 x 600 test print and
evaluate the print.
Are there defects in the print?
2 Is the paper wrinkled, dimpled or
show any signs of having a high
moisture content? Is the problem
resolved by loading fresh dry paper?
3 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.
4 Does the image quality improve if
the Imaging Unit is replaced?
5 Check the Heat Roller and NIP Belt
in the Fuser Assembly for evidence
of contamination or damage.
6 Does the imaging quality improve if
the Transfer Roller is replaced?
7 Does the image quality improve if
the Laser Unit is replaced?
Troubleshooting
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.
S6200-274
Yes
Replace the Image
Processor Board,
RRP 12.8
Complete
Remove the
obstruction or
debris.
Replace the
Imaging Unit (CRC,)
PL 9.1.3.
Replace the Fuser
Assembly, PL 8.1.1.
Replace the
Transfer Roller
(CRC,) PL 8.1.12.
Replace the Laser
Unit, RRP 9.1.
No
Go to step [2].
Go to step [3].
Go to step [4].
Go to step [5].
Go to step [6].
Go to step [7].
Replace the Engine
Control Board,
RRP 12.7.
103