Xerox 8830 Service Manual page 280

IMAGE DISPLACEMENT
(ROLLOVER) ON VELLUM OR FILM
PROBLEM
Image displacement (rollover) see Figure 1. in
the next column.
CAUSE
There are many factors that can aggravate
this problem but the main cause is the print
buckling and pulling away from the Heat Roll
between the fuser nip and the exit. At this
point in time, due the toner pile height, not ali
of the image is fused and the top surface of
the image stays with the Heat Roll.
buckle causes the media to move slightly
slower than the Heat Roll, so when the Heat
Roll and the media make contact again the
image is placed slightly ahead of where it
should be.
SOLUTION
Check the following:
• Ensure that the image density is set within
machine specifications. If the density is
set too high it will make the problem
worse.
• Slightly increase the fuser temperature.
More heat will help ensure that the image
will fuse fully.
• Replace the fabric guide and if required
the Heat Roll.
Service Notes
The
1/98
6-46
Direction of media
travel
Figure 1. Rollover
8830