01/023-10 8825/8830 PrinterPQ 3, PQ 4Print QualityPQ 3 Bands PQ 4 Black LinesTable 1 Bands Symptom / CheckSymptom/ checkBands are 1 mm or more andare perpendicular to themedia feed direction. Highdensity bands are called blacklines.Probable Cause Corrective Action1. Defective or intermittentCharge Scorotron.1. Check / clean / replace theconnections to the ChargeScorotron ( PL 9.3).2. Defective Transfer / DetackCorotron.2A. Check / replace theTransfer / Detack Corotron. (REP 9.9).2B. Ensure that the Corotronis installed in the correct posi-tion.3. Poor cleaning 3. Replace the Cleaner Blade( REP 9.4).4. Defective or contaminatedDrum.4. Determine and fix thecause of the damage to thedrum. Replace the Drum (REP 9.3).Table 1 Black Lines Symptom / CheckSymptom/ checkBlack lines appear in thedirection of media feed.Probable Cause Corrective Action1. Developer Bias and Trans-fer Corotron voltage set incor-rectly1. Ensure that TAG 19 isinstalled.2. Contaminated, damagedor disconnected ChargeScorotron2. Clean/replace or check theconnections to the chargescorotron ( PL 9.3).3. Poor cleaning 3. Replace the Cleaner Blade( REP 9.4).4. The surface of the heat rollis damaged.4. Determine and fix thecause of the damage to theheat roll. Replace the heatroll ( REP 10.2).5. The drum surface is con-taminated or damaged.5. Determine and fix thecause of the damage to thedrum. Replace the Drum (REP 9.3).6. The fuser temperature istoo high.6. Adjust the Fuser tempera-ture ( ADJ 10.1)7. Contaminated or damagedmag roll.7. Check for foreign objectson the mag roll.8. Defective Transfer/DetackCorotron.8. Check / replace the Trans-fer / Detack Corotron. ( REP9.1).
