Muratec MFX-2550 Field Engineering Manual page 241

6
4.5.3 Black image
Scanner section
Section Step Check item
Scanner section 1
(Front side)
2
3
4
5
6
7
Section Step Check item
Scanner section 1
(Back side)
2
3
4
5
6
7
Is the trouble settled with above
steps?
Does the LED lamp turn ON when
making copy with open platen cover?
Did 24V output between P2 pin 1 and
4 on Scanner board, when performing
the operation of step 1?
Did 24V output between P4 pin 16
and 18 on Scanner board, when per-
forming the operation of step 1?
Did 24V turn ON and OFF at P3 pin 2
on CCD board, when performing the
operation of step 1?
Are the mirrors and lens installed
properly?
Are the mirrors and lens dirty?
Is the trouble settled with above
steps?
Does the DADF LED lamp turn ON
when making duplex copy?
Did 24V output between P2 pin 1 and
3 on RADF board, when performing
the operation of step 1?
Did 24V output between P1 pin 1 and
2 and P3 pin 13 and 15 on R-Scanner
board, when performing the operation
of step 1?
Did 24V turn ON and OFF at P3 pin 2
on CCD board, when performing the
operation of step 1?
Are the mirrors and lens installed
properly?
Are the mirrors and lens dirty?
Is the trouble settled with above
steps?
NO 1. Replace toner cartridge.
2. Replace drum cartridge.
3. Replace LPH.
4. Replace LPH connect board.
5. Replace LPH board.
6. Replace main control board.
7. Replace high-voltage power
board.
8. Replace transfer roller unit.
Result Remedy
Check step 5 and onward.
YES
NO Reconnect / Replace harness.
NO Replace main control board.
NO Replace scanner board.
YES Replace LED lamp board.
NO Replace scanner unit.
NO Install them properly.
YES Clean or replace the parts, and
adjust the background level.
NO 1. Replace main control board.
2. Replace LPH board.
3. Replace LPH connect board.
4. Replace LPH.
Result Remedy
Check step 5 and onward.
YES
NO Reconnect / Replace harness.
NO Replace main control board.
NO Replace RADF board.
* Replace the R-Scanner board
when there is no 24 V output
between P3 pin 13 and 15.
YES Replace LED lamp board.
NO Replace scanner frame assy.
NO Install them properly.
YES Clean or replace the parts, and
adjust the background level.
NO 1. Replace LPH board.
2. Replace LPH connect board.
3. Replace LPH.
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