H/W Problems And Solutions - Muratec MFX-C4000 Field Engineering Manual

4.2.4 H/W problems and solutions

1) No Power
Description : Engine isn't warming up & LCD does not display anything on.
Check the flow chart
Check whether
the LED on Main
PBA is flickered on
(+5V Check)
ON/BLINK - +5V O.K
Each Check +24V
On Engine PBA
O.K
Check +3.3V
Replace
SUB PBA
Service Manual
Alignment & Troubleshooting
OFF:+5V N.G
N.G
N.G
O.K
Replace
Engine PBA
Check +5V
On SMPS
O.K
Each Check +24V
On SMPS
O.K
Replace
Engine PBA
4-92
N.G
Replace
SMPS
Replace
Engine PBA
N.G
Replace
SMPS