Xerox 8850 Service Manual

03/2003
3-20
8850/ 510DP
PQ 20, PQ 21
Print Quality
PQ 20 Unfused Prints PQ 21 Wrinkle/Crease
Table 1 Unfused Prints Symptom / Check
Symptom/ check
Characters and image are
easily rubbed off a print.
Probable Cause Corrective Action
1. Damp media 1A. Refer to BSD 7.1 and
BSD 7.3 to check for correct
operation of the Paper heat-
ers.
1B. Ensure that the Customer
is storing the media correctly.
2. Incorrect fuser temperature 2. Adjust the fuser tempera-
ture (ADJ 10.1).
3. Incorrect pressure applied
to Fuser Pressure Roll
3. Check pressure springs for
damage or deformation.
Replace as required (REP
10.4).
4. Defective Fuser Heat Roll 4. Replace the Fuser Heat
Roll (REP 10.2)
5. Defective Fuser Pressure
Roll.
5. Replace the Pressure Roll
(REP 10.8).
Table 1 Wrinkle Symptom / Check
Symptom/ check
This is damage that is proba-
bly caused by the fuser sub-
system. This is a severe case
of creases that runs in the
direction of media travel.
Probable Cause Corrective Action
1. Damp media 1A. Refer to BSD 7.1 and
BSD 7.3 to check for correct
operation of the Paper heat-
ers.
1B. Ensure that the Customer
is storing the media correctly.
2. Damaged or contaminated
pinch rolls
2. Clean / replace the pinch
rolls (REP 7.3).
3. Damaged or contaminated
Fuser Heat Roll
3. Clean / replace the Fuser
Heat Roll (REP 10.2).
4. Incorrect pressure applied
to Fuser Pressure Roll
4. Check pressure springs for
damage or deformation.
Replace as required (REP
10.4 )
5. Incorrect fuser temperature 5. Adjust Fuser Temperature
(ADJ 10.1).
6. Registration Rolls mis-
aligned.
6. Replace the rolls as
required (PL 8.2).
7. Exit Rolls damaged or mis-
aligned
7. Replace the Exit Rolls (PL
10.4)

Xerox 8850 Specifications

General

Brand	Xerox
Model	8850
Category	Printer
Language	English