01/02
3-18
8825/8830 Printer
PQ 18, PQ 19
Print Quality
PQ 18 Spots PQ 19 Uneven Density
Table 1 Spots Symptom / Check
Symptom/ check
Circular black spots on the
print.
Probable Cause Corrective Action
Perform Panic Stop/Image on
Drum procedure (Section 6),
and examine the drum for the
defect.
1. Defective, damaged or con-
taminated drum
1. If the drum is damaged,
determine and fix the cause of
the damage to the drum.
Replace the drum ( REP 9.3).
Repetitive spots 2. Contaminated heat roll 2. Clean or replace the heat
roll ( REP 10.2).
Repetitive spots 3. Contaminated fuser ther-
mistor
3. Clean the thermistor ( PL
10.4).
Random spots 4. Contaminated Web Oiler 4A. Check / replace ( REP
10.9)
4B. Check / adjust oil dis-
pense rate [10-32].
Random spots 5. Defective Lower Cleaning
Seal
5. Check / replace ( PL 9.10).
Random spots 6. Charge scorotron 6. Clean or replace the
scorotron ( REP 9.8).
Table 1 Uneven Density Symptom / Check
Symptom/ check
Density and line thickness
vary across the print.
Probable Cause Corrective Action
1. Incorrect Corotron opera-
tion
1. Perform GP 1, HVPS
Checkout Procedure.
2. Contaminated LED Image
Bar
2. Check / clean the Image
Bar. Check / clean the Air
Pressure Tubes ( PL 9.9).
3. Machine level 3. Check the level of the
machine. (See Installation
Procedure in Section 6.
4. Developer mag brush not
contacting the drum evenly.
4A. Clean drum ends and the
Spacer Rolls on the Devel-
oper Housing ( PL 9.10).
4B. Ensure that the housing
is latched securely.
5. Defective drum 5. Clean or replace the drum (
REP 9.3).
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