Black Vertical Belts Or Stripes; Cyclical Defect - Oki B4500 Maintenance Manual

4

Black vertical belts or stripes

• Perform the cleaning page function (see Section 4.2.2).
• Has the problem been solved?
• Yes End.
• No Replace the image drum cartridge.
• Has the problem been solved?
• Yes End
Note: After replacing the image drum cartridge, reset the drum counter (see User's
• Clean the LED lens array of the LED head.
• Has the problem been solved?
• Yes End.
• No Replace the LED head.
• Has the problem been solved?
• Yes End
• No Replace the main control board or high voltage/sensor board.
5

Cyclical defect

Image drum
Developing roller
Toner supply roller
Charging roller
Cleaning roller
Transfer roller
Heat roller
Back-up roller
Notes: After replacing the image drum cartridge, reset the drum counter (see User's Manual).
43502101TH Rev.1
Manual).
Frequency
3.71" (94.2mm)
1.86" (47.12mm)
2.96" (75.27mm)
1.21" (30.63mm)
0.93" (23.56mm)
1.95" (49.6mm)
2.44" (62.0mm)
2.73" (69.4mm)
Remedy
Replace or clean the image drum cartridge.
Replace the image drum cartridge.
Replace the image drum cartridge.
Replace the image drum cartridge.
Replace the image drum cartridge.
Replace the transfer roller.
Replace the fusing unit assy.
Replace the back-up roller.
Oki Data CONFIDENTIAL
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