Pq 9 Deletions (Bands); Pq 10 Deletions (In Solid And Halftone Areas) - Xerox 8825 Service Manual

PQ 9 Deletions (bands)

Table 1 Deletions (bands) Symptom / Check
Symptom/ check Probable Cause
Deletion bands or very low
image density perpendicular
to the print feed direction.
1. Damp media
2. Incorrect Corotron opera-
tion.
4. Defective drum or no drum
drive.
5. Magnetic roll
6. Image Module Roller not
contacting drum
7. Media Transport.
8825/8830 Printer

PQ 10 Deletions (in solid and halftone areas)

Corrective Action Symptom/ check
Bands of deletion in the solid
or halftone areas in the print
feed direction.
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.
2A. Check / Clean or replace
the T/DT corotrons as
required ( PL 9.4).
2B. Perform GP 1 HVPS
Checkout Procedure.
4A. Check for correct opera-
tion of the drive system.
4B. Replace the drum ( REP
9.3).
5A. Ensure that the housing
is latched securely.
5B. Check the mag roll for
damage or binding.
6. Check/clean/replace as
required ( PL 9.3).
7. Ensure that the Media
Transport gap ( ADJ 8.4) is
set correctly.
01/02
3-13
Table 1 Deletions (in solid and halftone areas) Symptom / Check
Probable Cause
1. Damp media
2. Exposure
3. Incorrect Corotron opera-
tion
4. Magnetic roll
5. The surface of the heat roll
is damaged.
6. Media Transport.
Corrective Action
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.
2A. Clean the Image Bar.
Check / clean the Air Pressure
Tubes ( REP 9.18).
2B. Enter [9-21-5 and check
for correct operation. (Refer
to BSD 6.1, BSD 6.2 and
check for correct electrical
connections to/from the
Receiver PWB and the LED
Image Bar).
3. Perform GP 1, HVPS
Checkout Procedure.
4. Check the mag roll for
damage or binding.
5. Determine and fix the
cause of the damage to the
heat roll. Replace the heat
roll ( REP 10.2).
6. Ensure that the Media
Transport gap ( ADJ 8.4) is
set correctly.
Print Quality
PQ 9, PQ 10