Muratec MFX-2550 Field Engineering Manual page 263

No. Symptom
The warning mes-
6 1. Has the lamp been illuminated?
sage " Lamp error.
Call for service."
2. Is the CCD harness connecting cor-
is displayed.
3. Are the sheet document press or
4. Are the document glass or the mir-
5. Are the mirror carriage belts or the
6. If you replace the home sensor or
7. If you replace the LED lamp board
8. If you replace the carriage or the
9. If you replace the main control board
7 The message "No 1. Did you load paper in the cassette
Paper" is dis-
played.
2. Press the paper detection feeler
4. If you replace the main control
1. Is there any paper jam on the paper
8 Paper jams or the
message "Open
the flashing cover
2. Is there electrical continuity in the
and check......"
i s d i s p l a y e d .
3. Is there electrical continuity in the
4. Is there electrical continuity in the
5. If you replace the PSS sensor or
6. If you replace the LPH board, the
7. If you replace the main control
What to confirm
rectly?
back ground level plate dirty?
rors dirty?
home sensor attached correctly?
the connecting harness, the symp-
tom will be fixed.
or the connecting harness, the
symptom will be fixed.
connecting harness, the symptom
will be fixed.
or the connecting harness, the
symptom will be fixed.
properly?
when the machine is in ready
mode, and check the sensor output
changes to +3V through GND.
Cassette 1 : Main control board
P14-4
Cassette 2 : Main control board
P15-4
board, the symptom will be fixed.
pass?
harness between the PSS sensor
and the main control board?
harness between the PDS sensor
and the LPH board?
harness between the main control
board and the LPH board?
the PDS sensor, the message will
disappear.
message will disappear?
(PDS sensor only)
board, the message will disappear.
Yes Check No. 2.
No Check No. 7.
Yes Check No. 3.
No Connect the harness.
Yes Clean, or replace them.
No Check No. 4.
Yes Clean, or replace them.
No Check No. 5.
Yes Check No. 4.
No Reattach them.
Yes Replace the sensor or the harness.
No Check No. 7.
Yes Replace the carriage or the harness.
Check No. 8.
No
Yes Replace the circuit board or the har-
ness.
No Check No. 9.
Yes Replace the main control board.
No Replace the machine.
Yes Check No.2.
No Re-load paper.
Yes Replace the sensor or the harness.
No Check No. 3.
Yes Replace the sensor or the harness.
No Check No. 4.
Yes Replace the main control board.
No Replace the machine.
Remove the paper.
Yes
No Check No. 2.
Yes Check No. 3.
No Replace the PSS sensor or the con-
necting harness.
YES Check No. 4.
NO Replace the connecting harness.
YES Check No. 5.
NO Replace the connecting harness.
Yes Replace the sensor.
No Check No. 6.
Yes Replace the LPHboard.
No Check No. 7.
Yes Replace the main control board.
No Replace the machine.
4-50
Countermeasure