Pq 7 Blurred Image; Pq 8 Deletions (Bands) - Xerox 8825 Service Manual

PQ 7 Blurred Image

Table 1 Blurred Image Symptom / Check
Symptom/ check Probable Cause
The image is not clear or
sharp.
1. Defective/contaminated
Image Module.
2. Contamination on Transfer/
Detack Corotron
3. Defective drive gear
4. Defective registration roller 4. Replace as required (
5. Media transport
6. Defective buckle control
Print Quality
PQ 7, PQ 8

PQ 8 Deletions (bands)

Corrective Action Symptom/ check
Deletion bands or very low
image density in the print feed
direction.
1A. Ensure the spacing rollers
and drum ends are not con-
taminated/defective.
1B. Clean the LED Array with
a lint-free cloth.
2A. Clean or replace as
required.
2B. Perform GP 1, HVPS
Checkout Procedure.
3. Check the following drive
gears for damage:
a. drum drive gear
b. developer drive gear
c. cleaner drive gear
PL
8.2).
5. Check the Media Transport
gap ( ADJ 8.4).
6. Replace the buckle switch
( PL 8.4).
01/02
3-12
Table 1 Deletions (bands) Symptom / Check
Probable Cause Corrective Action
1. Damp media 1A. Refer to
BSD 7.3
operation of the Paper heat-
ers.
1B. Ensure that the Customer
is storing the media correctly.
2. Corotrons 2A. Clean / replace or repair
the T/DT corotrons (
9.9).
3. Defective HVPS 3.
Checkout Procedure.
4. Developer Housing 4A.
oper
securely.
4B.
foreign material or contamina-
tion. Ensure that there is an
even coating of developer
material on the mag roll.
5. Defective or contaminated 5.
LED Image Bar. Image Bar [9-21-5. (
6. Contaminated Erase 6. Clean with a lint free cloth.
Lamp.
7. Media transport 7. Ensure that the gap (
8.4) is set correctly.
8. Heat Roll 8. Check for surface damage.
(
9. Defective drum 9. Replace the drum (
9.3).
BSD 7.1 and
to check for correct
REP
Perform GP 1, HVPS
Ensure that the Devel-
Housing is latched
Check the mag roll for
Check / clean the LED
PL 9.3)
ADJ
PL 10.2)
REP
8825/8830 Printer