Problem Observed
A narrow streak down the
image in the process
direction. The streak may be
lighter or darker than the
adjacent areas of the image.
The scanner does not
resolve at least 5 lines per
mm as indicated by the
resolution target on Test
Pattern 82E5980.
A portion of the image is
blank or is black. The blank
or black portion extends the
entire length of the image in
the process direction. The
Normalize Cameras
diagnostic test fails
consistently.
There is a gap, an overlap,
or a shift in the image at the
stitch point between two of
the camera images
The image is scrambled.
Table 1.
Probable Cause
Dirt on the Platen Glass.
The focus of the cameras is
misadjusted.
Fault in the camera cables or the
Control PWB. Fault in one or two
of the cameras.
Front/Back Stitch or Left/Right
Stitch is not correctly adjusted
1. Software in the Scanner is
corrupted.
2. The Control PWB has a
malfunction.
Additional Symptoms
Reference
Figure
Figure 1
Initial Action
Carefully clean the glass.
Make another copy to see if
the problem still exists..
Ensure that the viewer is set
for maximum enlargement
when evaluating the
resolution.
Go to the Scanner Will Not
Normalize CQ RAP.
Do the Front/Back Stitch
and Left/Right Stitch
adjustments
1. Configure for diagnostics.
Select Download Code
load new software into the
Scanner. Refer to Section 6
for instructions.
2. Replace the Control PWB
If the problem still exists
1. Check the Platen Glass for
permanent defects. If found,
replace the glass.
2. Replace the Control PWB. If
the problem still exists, the fault
is in the cameras and is not
repairable in the field. Escalate
the call.
The focus cannot be corrected in
the field. Escalate the call, and
arrange for the exchange of the
scanner.
Escalate the call. Further repairs
cannot be done in the field.
1. Replace the Control PWB.
2. Escalate the call.
7356 Scanner
3/98
3-5
Entry RAP
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