OKI OKIFAX 5750
Service Manual

Troubleshooting flow chart 8:

The blank background is smeared.

Has the Image Drum been exposed to external light? No

Yes

Close and wait for about 30 minutes.

Is the heat roller of the fuser unit dirty? No

Yes

Clean it.

Is the contact of the cleaning roller Yes of the ID unit in contact with the contact assembly properly? No

Adjust the contact of the cleaning roller to contact the contact assembly properly.

Replace the EP unit or H10 Board MCNT (R76) Board

Troubleshooting flow chart 9:

Blank paper is output

Is the LED head connected properly? (Check connector CN4/CN5 on the MCNT (R76) Board.) Yes Is the ID unit set properly? Yes No

No

Connect to the LED print head properly.

Set the ID unit properly.

Replace the LED head,Power Supply Unit or MCNT (R76) Board.

41285901TH Rev.1

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