Oki OKIFAX4550 Maintenance Manual page 255

Troubleshooting flow chart 8:
The blank background is smeared.
Is the contact of the cleaning roller
with the contact assembly properly?
Troubleshooting flow chart 9:
Is the LED head connected properly?
Power Supply Unit or MCNT Board.
41309401TH Rev.4
Has the Image Drum been
exposed to external light?
No
Is the heat roller of the
fuser unit dirty?
No
of the EP unit in contact
No
Replace the EP unit or
P2H/P6L
Board
MCNT Board
Blank paper is output
(Check connector CN14 on
the MCNT Board.)
Yes
Is the EP unit set
properly?
Yes
Replace the LED head,
Yes
Close and wait for about
30 minutes.
Yes
Clean it.
Yes
Adjust the contact of the
cleaning roller to contact
the contact assembly properly.
No
Connect the LED print
head properly.
No
Set the EP unit properly.
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