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4.6.10 Smear on back
Printer section
Section Step Check item Result Remedy
Paper path 1 Is paper path dirty with toner? YES Clean
Fuser unit 2 Are the fusing rollers or separation
scraper dirty or damaged?
Yes Clean / Replace
Transfer section 3 Is the transfer roller dented or dam-
aged?
Yes Replace
Circuit boards 4 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.)
No Reconnect / Replace harness
5 Is the trouble settled with above
steps?
NO 1. Replace drum cartridge.
2. Replace fuser unit.
3. Replace high-voltage power
board.
4. Replace main control board.
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