Xerox Phaser 6200, Service Manual

Page: 121 / 386

Troubleshooting 103
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.
Step Check Yes No
1 Print the 600 x 600 test print and
evaluate the print.
Are there defects in the print? Replace the Image
Processor Board,
RRP 12.8 Go to step [2].
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? Complete Go to step [3].
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. Remove the
obstruction or
debris. Go to step [4].
4 Does the image quality improve if
the Imaging Unit is replaced? Replace the
Imaging Unit (CRC,)
PL 9.1.3. Go to step [5].
5 Check the Heat Roller and NIP Belt
in the Fuser Assembly for evidence
of contamination or damage. Replace the Fuser
Assembly, PL 8.1.1. Go to step [6].
6 Does the imaging quality improve if
the Transfer Roller is replaced? Replace the
Transfer Roller
(CRC,) PL 8.1.12. Go to step [7].
7 Does the image quality improve if
the Laser Unit is replaced? Replace the Laser
Unit, RRP 9.1. Replace the Engine
Control Board,
RRP 12.7.
S6200-274