Machine Malfunction - Muratec MFX-2550 Field Engineering Manual

4.8 Machine malfunction

No. Symptom What to confirm
The LCD shows 1. Is the machine in energy save mode? Yes
1
nothing.
2. Is the power cable plugged correctly? Yes
3. Is the power switch On?
4. Does the DC output voltages from
5. Is the following connection OK?
• LCD assembly to the Panel PCB. (P8)
• Panel PCB (P1:) to the harness to the
6. If you replace the panel board, the
7. If you replace the main board, the
The LCD shows 1. If you close the flashing cover, the
2
"Please close
the flashing
2. Is the cover secured firmly by
cover."
3. Is the message shown after energy
4. Does the LPH board P93-8 have
5. Press the sensor in the message and
6. If you replace LPH board or the con-
7. If you replace the main control board,
the power supply unit to connector
P3 on the main control boar have the
following output?
Pin 7, 9 +3.3 V
Pin 15, 17 +5.0 V
Pin 2, 4, 6 +12.0V
Pin 12, 14 +24.0V
P i n 1 , 3 , 5 , GND
8, 10, 11, 13,
19, 21, 23
main control board. (P5A)
symptom will be fixed.
symptom will be fixed.
symptom will be fixed.
screws?
save mode is released?
+24V output?
check the output changes to +3V
through GND. (The interlock +24V
through GND.)
Interlock : LPH board P93-11
JAMC1 : LPH board P93-3
JAMC2: Main control board P17-7
ADF cover: Main control board P82-1
necting harness, the message will
disappear.
the symptom will be fixed.
Countermeasure
Press the energy save key, and release
the mode.
No Check No.2.
Check No.3.
No Plug the cable correctly.
Yes Check No.4.
Power on.
No
Yes Check No.5.
Replace the power supply.
No
Yes Check No.6.
No Reconnect the connection or replace
the harness.
Yes Replace the panel board.
No Check No.7.
Yes Replace the main control board.
No Replace the machine.
Solved.
Yes
No Check No.2.
Yes Check No.3.
Secure the cover properly.
No
Yes Check No.4.
No Check No.5.
Yes Check No.5.
No Check No.6.
No Replace the sensor or the harness.
Yes Check No.6.
Yes Check No.6.
Yes Check No.7.
Yes Check No.7.
Yes Replace the circuit board or the har-
No ness.
Check No.7.
Yes Replace the main control board.
No Replace the machine.
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