PQ18 Spots
Symptom/ check
Circular black spots on the print.
Perform Panic Stop/Image on Drum procedure
(Section 6), and examine the drum for the
defect.
Repetitive spots
Repetitive spots
Random spots
Random spots
Random spots
Probable Cause
1. Defective, damaged or contaminated drum
2. Contaminated heat roll
3. Contaminated fuser thermistor
4. Contaminated Web Oiler
5. Defective Lower Cleaning Seal
6. Charge scorotron
Corrective Action
1. if the drum is damaged, determine and fix the
cause of the damage to the drum. Replace the
drum (REP 9.3).
2. Clean or replace the heat roll (REP 10.2).
3. Clean the thermistor (PL 10.4).
4A. Check / replace (REP 10.9)
4B. Check/ adjust oil dispense rate [10-32].
5. Check/replace (PL 9.10).
6. Clean or replace the scorotron (REP 9.8).
8830
1/98
3-27
PQ 18 Spots
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