Oki OKIFAX4550 Maintenance Manual page 259

Troubleshooting flow chart 13:
Is the contact plate of the transfer
roller in contact with the contact
Is the LED print head installed
Replace the
41309401TH Rev.4
White belts or streakes in
the vertical direction
Is the lens surface of the
LED print head dirty?
No
assembly properly?
Yes
Replace the transfer roller
Solved?
No
properly?
Yes
Replace the LED print head.
Solved?
No
Replace the EP unit.
Solved?
No
P2H/P6L
Board
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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