Oki OKIFAX 5400 Maintenance Manual page 238

Troubleshooting flow chart 14:
40838301TH Rev.1
White belts or streakes in
the vertical direction
Is the lens surface of the
LED print head dirty?
No
Is the contact plate of the transfer
roller in contact with the contact
assembly properly?
Yes
Replace the transfer roller
Solved?
No
Is the LED print head installed
properly?
Yes
Replace the LED print head.
Solved?
No
Replace the ID unit.
Solved?
No
Replace the Power Supply Unit.
Yes
Clean the lens.
No
Make proper contact of the
contact plate with the contact
assembly.
Yes
End.
No
Install the LED print head
prolerly.
Yes
END.
Yes
END
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