White Vertical Belts Or Streaks (Figure 5-3 F ); 43502101Th Rev.1 - Oki B4500 Maintenance Manual

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White vertical belts or streaks
• Are the LED lens dirty?
• Yes Clean the LED lens.
• No Is the contact plate of the transfer roller in proper contact with the high voltage/sensor board
(see Figure 5-5)?
• No Adjust the contact plate to make a proper contact with the high voltage/sensor board.
• Yes Replace the transfer roller.
• Has the problem been solved?
• Yes End
• No Is the tension between the back-up roller (7.52kg) and the surface of back-up roller normal?
•No Replace the back-up roller or bias spring.
• Yes Is the LED head being installed properly (check HEAD connector on the main control board
and PC connector on the LED head)?
• No Install the LED head properly.
• Yes Replace the LED head.
• Has the problem been solved?
• Yes End
• Yes 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
• No Replace the main control board or high voltage/sensor board.

43502101TH Rev.1

Manual).
Oki Data CONFIDENTIAL
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