Pq 22 Offsetting; Pq 23 Verticle Magnification - Xerox 8850 Service Manual

PQ 22 Offsetting

Table 1 Offsetting Symptom / Check
Symptom/ check Probable Cause
Offsetting is the result of toner
adhering to the Fuser Heat
Roll and transferring to subse-
quent prints.
1. There is insufficient fuser
oil on the Fuser Heat Roll.
2. The fuser temperature is
out of specification.
3. Incorrect pressure applied
to Fuser Pressure Roll
4. Media is damp.
5. Damaged or contaminated
Fuser Heat Roll
6. Damaged or contaminated
Pressure Roll
8850/ 510DP

PQ 23 Verticle Magnification

Corrective Action Symptom/ check
Magnification in the process
direction (verticle) is incorrect.
1A. Check/replace the Web
Oiler (REP 10.7 ).
1B. Check/adjust oil dispense
rate [10-32].
2. Check Fuser Temperature
(ADJ 10.1).
3. Check pressure springs for
damage or deformation.
Replace as required (REP
10.4)
4A. Ensure that the media is
stored correctly.
4B. Refer to BSD 7.1 and
BSD 7.3 to check for correct
operation of the paper heat-
ers.
5. Clean or replace the Fuser
Heat Roll (REP 10.2).
6. Clean or replace the Pres-
sure Roll (REP 10.8).
03/2003
3-21
Table 1 Offsetting Symptom / Check
Probable Cause Corrective Action
Incorrect verticle magnifica- Adjust the Verticle magnifica-
tion adjustment tion (ADJ
Drum Motor Encoder is Check/Repair
installed incorrectly or is not (REP
operating correctly.
Drum Motor Cover is interfer- Remove the Cover and shim
ring with the Encoder shaft. the cover away from the
Encoder shaft using washers
on
between the cover and the
housing.
8.1)
the Encoder
9.23).
the mounting screws
Print Quality
PQ 22, PQ 23