Muratec MFX-2550 Field Engineering Manual page 248

Transfer section 7
8
Discharge plate 9
9
4.5.8 Black lines
Scanner section
Section Step Check item
Scanner section 1
(Front side)
2
3
Section Step Check item
Scanner section 1
(Back side)
2
3
Is the transfer roller dented or
damaged?
Is the transfer roller gap dirty?
Is the discharge plate deformed?
Is the trouble settled with above
steps?
Are the mirrors, lens, ADF glass and
document glass dirty?
Do the connection from CCD 
Scanner board  Main control board
 LPH board  LPH connect board
 LED unit remain intact?
Is the trouble settled with above
steps?
Are the mirrors, lens, DADF glass
and document 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?
YES Replace.
YES Clean. / Replace.
YES Replace.
NO 1. Replace drum cartridge.
2. Replace 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.
Result Remedy
YES Clean.
If the trouble is not settled
by cleaning, adjust the
background level.
NO Reconnect / Replace harness
NO 1. Replace scanner board.
2. Replace main control board.
3. Replace LPH board.
4. Replace LPH connect board.
5. Replace LPH.
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.
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