Pq 13 Light Image; Pq 14 Misregistration - Xerox 8850 Service Manual

PQ 13 Light Image

Table 1 Light Image Symptom / Check
Symptom/ check Probable Cause
Image area of a print has low
density.
1. Damp media
2. Incorrect Image Module
LED duty cycle
3. Incorrect Corotron opera-
tion
4. Incorrect Image Density
adjustment
5. Contaminated BTR, dam-
aged drive gears or poor elec-
trical connection
6. Defective Drum ground.
7. Defective Drum.
8. Developer Housing
Print Quality
PQ 13, PQ 14

PQ 14 Misregistration

Corrective Action Symptom/ check
The registration of the image
on the prints is incorrect from
top to bottom or side to side.
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. Perform Electrostatic
Series (ADJ 9.2).
3A. Perform Electrostatic
Series (ADJ 9.2)
3B. Perform GP 1, Xero-
graphic HVPS Checkout Pro-
cedure.
4A. Perform Electrostatic
Series (ADJ 9.2).
4B. Perform Image Density
(ADJ 9.3).
5. Check/ clean/ repair BTR
Slip Ring connection.
Check/ replace drive gears
(PL).
Clean/ replace BTR (REP
9.22),
6. Ensure that the Drum is
correctly grounded.
7. Replace the Drum (REP
9.3).
8. Ensure the housing is
latched securely.
03/2003
3-16
Table 1 Misregistration Symptom / Check
Probable Cause Corrective Action
1. Incorrect registration 1. Adjust Lead Edge Registra-
adjustment tion
2. Damaged or worn compo- 2. Check the components for
nents in the media feeding damage or wear.
area
3. Defective Media Registra- 3. Refer to
tion Sensor check the operation of the
Media Registration Sensor.
Replace the sensor if required
(REP
4. Incorrect Registration 4. Clean or replace the Regis-
Pinch Roll nip tration Pinch Roll
5. Incorrectly loaded media 5. Instruct the operator on
loading the media correctly.
(ADJ 8.2).
BSD 8.1 and
8.8).
(PL 8.2).
8850/ 510DP