17. Dark Spots; Deletions (Comet); Deletions (Hollow Characters).3-11; Dirt, Toner, Or Contamination On - Xerox DocuPrint C55 Service Manual

Defect Name / Description

17. DARK SPOTS.

18. DELETIONS (COMET).

Small white deletions app. 1mm wide X 1-
5mm long.
19. DELETIONS (HOLLOW CHARACTERS).

20. DIRT, TONER, OR CONTAMINATION ON

THE REVERSE SIDE OF THE PRINT (IT
MAY BE REPEATING).
DocuPrint C55/C55mp/[NC60]
Possible Causes
1. Print Drum Module defective.
2. Toner falling from the developer housings.
3. Poor developer mixing.
4. Oil Spots on Print Drum.
1. High Volume operation (more that 500 prints
per day.
1. Transfer Drum Nip too large.
1. Toner in the paper path.
2. Dirty Fuser Pressure Roll, repeats every 3.66
inches.
3. Transfer Drum Cleaning failure.
4. Dirty Printer (Sump Full).
5. High volume Printer.
2/99
3-11
Corrective Action
1. Replace the Print Drum Module.
2. Clean Toner from the developer housings.
3. Replace the Developer Module.
4. Check for Oil leaks. Replace Print Drum
Module.
1. Switch on Cleaning Cycles.
Refer to GP 3.4
1. Perform Transfer Drum Nip Adjustment
(ADJ 11.1)
1. Clean the paper path.
2. Replace the Fuser Module.
3. Replace the Transfer Drum Cleaning Blade
and Brush.
4. Refer to BSD 9.21 and check the Waste
Toner Full signal, CN102-3, for a short to
ground.
5. Increase the cleaning cycles.
GP 3.4 in Section 6
IMAGE QUALITY RAPs
IMAGE QUALITY DEFECTS
Refer to