Damaged Media; Media Handling Problems - Xerox 8850 Service Manual

Damaged Media

Table 1 Damaged Media
Defect probable cause
1. Crease Marks 1. This defect can be caused
A thin irregular line on the by incorrect handling of the
media caused by stressing the media.
media.
2. Dog Ears 2. Curled media caused by a
This is a corner of the lead failed or damaged Detack
edge of the print that has been Corotron.
bent back.
3. Frayed Side Edge 3. Incorrect media side to
This is damage to the sides of side registration
the print.
4. Wrinkle 4a. Damage or obstruction in
This is damage that is proba- the media path.
bly caused by the fuser sub- 4b. Damp media
system. This is a severe case
of creases that runs in the
direction of media travel.
4c. Pressure Roll is contami-
nated or damaged.
4d. Incorrect fuser pressure.
4e. Fuser Heat Roll is con-
taminated or damaged.
4f. Pressure Roll is contami-
nated or damaged.
5. Cockle 5a. Damage or obstruction in
The media has a rough sur- the media path
face like an orange peel. 5b. Fuser is too hot.
This damage could be caused
by the fuser subsystem. 5c. Damp media.
6. Other Damage
8850/ 510DP

Media Handling Problems

Introduction
Experience has shown that many media transportation problems have more than one cause
corrective action
and must be handled using a systematic approach. Media transportation problems appear as
one of the following symptoms:
1. Ensure that the media is
stored correctly and is not •
damaged when inserted in the
•
Printer.
•
2a. Try using a new roll of
•
media.
When these symptoms occur, perform the following checks of the media and Printer and per-
2b. Check for an obstruction
form the corrective actions.
caused by a Detack Corotron.
3. Ensure that the media is
loaded correctly.
Media Check
Check the media path for an
obstruction.
1. Check the type of media:
4a. Clear the media path of a. Bond media less than 20 lb may perform
obstructions. with less reliability than Xerox 20 lb.
4b. Ensure that the Customer b. Other brands of media may have different
is storing the media correctly. design specifications than Xerox media and
Refer to BSD 10.3, BSD 7.2 may not give acceptable performance in the
and BSD 7.4 to check for cor- Printer.
rect operation of the Media
2. Check the storage of media:
heaters (HR1, HR3).
a. Media that is exposed to the environment
4c. Refer to BSD 10.3 and
may have damp areas.
check that the Pressure Roll is
b. Media may have curled ends because of
not contaminated or damaged.
incorrect storage.
4d. Check that the Pressure
Roll Springs (2) are not dam-
aged and are installed cor-
rectly.
4e. Clean/ replace the Fuser
Heat Roll (REP 10.2).
Printer Check
4f. Clean/ replace the Pres-
sure Roll REP 10.8.
1.
4g. Check that Tag 4 Media
Corotron resulting in an open circuit or arcing.
Corner Curl kit is installed.
2. An incorrect electrostatic value can cause
5a. Clear the media path of jams or deletions.
obstructions. 3. Warped Media Transport Module frame.
5b. Check Fuser Temperature
(ADJ 10.1)
5c. Ensure that the Customer 4. Broken or damaged Media Shield
is storing the media correctly. 5. Check the stainless steel media Clips
Refer to BSD 7.1 and BSD 7.3 8.3) are seated fully (no space between the
to check for correct operation Clips and the wall of the Detack Corotron
of the Paper heaters. channel).
6. Check that Tag 4, Media Corner Curl Kit is
6. If there are other defects on
installed.
the print, go to Media Handling
Problems on, following page.
03/2003
3-9
Pre-fuser jams
Bias Transfer Roll/transfer area jams
Print quality defects
Physical distortion of media
Table 1 Media Check
Table 2 Printer Check
Contaminated or damaged Detack
(PL
Damaged Media, Media Handling Problems
Corrective Action
a. Use Xerox-qualified media.
b. After all media checks, test with fresh Xerox
media.
a. Suggest keeping the media in the package
in which the Xerox media is shipped until the
media is to be used.
b. Suggest that the media should be stored
correctly.
c. Recommend keeping the Printer switched
on overnight to help eliminate moisture
buildup.
Corrective Action
1. Clean or replace if necessary (REP 9.9).
2. Check the following:
a. Clean or replace the Detack Corotron as
required (PL 8.3).
3. With a straight edge, check flatness of the
extrusion wall between the BTR and Detack.
Replace Detack and BTR Exreusion (PL
4. Replace the Media Shield (PL 8.3)
5. Replace the Clips as required (PL 8.3) .
6. Install the Media Corner Curl Kit.
Change Tag Information)
Print Quality
8.1)
(8850