Black Spots - Muratec MFX-3595 Field Engineering Manual

4.6.9 Black spots

Scanner section
Section Step Check item
Scanner section 1
2
3
Printer section
Section Step Check item
Paper path 1
Drum cartridge 2
3
Fuser unit 4
Circuit boards 5
6
Is the document glass dirty?
Do the connection from CIS to main
control board remain intact?
Is the trouble settled with above
steps?
Is paper path dirty with toner?
Is the OPC drum dirty or damaged?
Is there any cleaning trouble?
Are the fusing rollers or separation
scraper dirty or damaged?
Are the connections from LED print
head and from high-voltage board to
main control board in good condition?
(Check plugs firmly plugged and
snapped harness.)
Is the trouble settled with above
steps?
Result Remedy
Yes Clean
No Reconnect / Replace harness.
No 1. Replace CIS.
3. Replace main control board.
Result Remedy
YES Clean
Yes Replace OPC drum
Yes Replace drum cartridge
Yes Clean / Replace
No Reconnect / Replace harness
No 1. Replace drum cartridge.
2. Replace fuser unit.
3. Replace LED print head.
4. Replace main control board.
5. Replace high-voltage power
board.
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