Muratec MFX-2550 Field Engineering Manual page 255

Printer section
Section Step Check item
Toner cartridge 1
2
3
Drum cartridge 4
5
Fusing unit 6
Transfer section 7
8
Discharge plate 9
Circuit boards 10
11
Is the toner cartridge driven properly?
Is the developing bias or supply bias
contact terminal dirty or deformed?)
Is the gap roller dirty or broken?
Is the charge wire dirty?
Is the drum dirty or damaged?
Is the fusing roller dirty or damaged?
Is the transfer bias contact terminal
dirty or deformed?
Is the transfer roller dented or
damaged?
Is the discharge plate deformed?
Are the connections from LPH to
high-voltage board, 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
Correct. / Replace drive
NO
coupling mechanism of toner
cartridge and machine.
Replace the toner cartridge.
YES Clean. / Replace.
YES Clean. / Replace.
YES Clean.
YES Replace.
YES Clean. / Replace.
YES Clean. / Replace.
YES Replace.
YES Replace.
NO Reconnect. / Replace harness.
NO 1. Replace toner cartridge.
2. Replace drum cartridge.
3. Replace fusing unit.
4. Replace LPH.
5. Replace LPH connect board.
6. Replace LPH board.
7. Replace main control board.
8. Replace high-voltage power
9. Replace transfer roller unit.
4-42
board.