Muratec MFX-2550 Field Engineering Manual page 246

Section Step Check item
Scanner section 1
(Back side)
2
3
Printer section
Section Step Check item
LED unit 1
Toner cartridge 2
Fusing unit 3
Drum cartridge 4
Circuit boards 5
Transfer section 6
Discharge plate 7
8
Is the DADF glass dirty?
Do the connection from CCD 
R-Scanner board  RADF board
Main control board  LPH board
 LPH connect board  LED unit
remain intact?
Is the trouble settled with above
steps?
Is the LED dirty?
Is the toner layer on the developing
roller normal?
Is the fusing roller or separation
scraper dirty or damaged?
Is the separation sheet dirty or
damaged?
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 transfer roller dented or
damaged?
Is the discharge plate deformed?
Is the trouble settled with above
steps?
Result Remedy
YES Clean.
If the trouble is not settled by
cleaning, adjust the background
level.
NO Reconnect / Replace harness
NO 1. Replace R-Scanner board.
2. Replace RADF board.
3. Replace main control board.
4. Replace LPH board.
5. Replace LPH connect board.
6. Replace LPH.
Result Remedy
YES Clean.
NO Replace.
YES Clean. / Replace.
YES Clean. / Replace.
NO Reconnect. / Replace harness.
YES Replace.
YES Replace.
NO 1. Replace drum cartridge.
2. Replace the fusing unit.
3. Replace LPH.
4. Replace LPH connect board.
5. Replace LPH board.
6. Replace main control board.
7. Replace high-voltage power
board.
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