Xerox Phaser 7300B, Service Manual

Page: 121 / 277

Troubleshooting 3-105
Missing Bands, Voids or Streaks in a Single Color
or All Colors Parallel to the Leading Edge of the
Paper (Scan Direction)
There are areas of the image that are extremely
light or missing entirely. These missing areas
form wide bands that run along the page
parallel to the leading edge of the paper.
This can be caused by Imaging Unit oil lines
that develop on the green roller, if the printer is
not used for extended periods of time, like
overnight. The mark will disappear after the
first print and might not leave a repeating bar.
.
Troubleshooting Procedure
Step Check Yes No
1 Print the 100% Solid Fill Test print.
Is the problem with one primary color? Replace the
defective
Imaging Unit. Go to step [2].
2 Is the paper wrinkled, dimpled or show signs of
having high moisture content?
Load a fresh ream of paper.
Did this correct the problem? Complete Go to step [3].
3 Print the Repeating Defects page.
Do the defects correspond to a customer
Replaceable Consumable?
see “Repeating Defects Identification Chart” on
page 3-80 See "Repeating
(Defects) Bands,
Lines, Marks or
Spots" on
page 3-95 Go to step [4].
4 Inspect the Fuser housing for warping or
damage. Replace the
Fuser. Replace the
Engine
Controller
Board.
S7300-035
Scan
P
roc
ess