Muratec MFX-2550 Field Engineering Manual page 240

4.5.2 Blank image
Scanner section
Section Step Check items
Scanner section 1
(Front side)
2
3
4
Section Step Check items
Scanner section 1
(Back side)
2
3
Printer section
Section Step Check items
Toner cartridge 1
2
Drum cartridge 3
Circuit boards 4
Transfer section 5
Is the scanner drive transmission
mechanism in good condition?
Do the connection from CCD 
Scanner board  Main control board
 LPH board  LPH connect board
 LED unit remain intact?
Are the mirrors and lens dirty?
Is the trouble settled with above
steps?
Do the connection from CCD 
R-Scanner board  RADF board
Main control board  LPH board
 LPH connect board  LED unit
remain intact?
Are the mirrors and lens dirty?
Is the trouble settled with above
steps?
Is the toner cartridge driven properly?
Is the developing bias or supply bias
contact terminal dirty or deformed?
Is the grid bias, wire electrode contact
terminal, or drum ground contact
terminal dirty or 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 transfer bias contact terminal
dirty or deformed?
Result Remedy
NO Check and change as
necessary.
NO Reconnect / Replace harness.
YES Clean or replace the parts, and
adjust the background level.
NO 1. Replace scanner board.
2. Replace main control board.
3. Replace LPH board.
4. Replace LPH connect board.
5. Replace LPH.
Result Remedy
NO Reconnect / Replace harness.
YES Clean or replace the parts, and
adjust the background level.
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
Correct / Replace drive
NO
coupling mechanism of toner
cartridge and machine.
Replace the toner cartridge.
YES Clean. / Replace.
YES Clean. / Replace.
NO Reconnect. / Replace harness.
YES Clean. / Replace.
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