Konica Minolta BIZHUB 25E Field Engineering Manual page 235

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