Minolta EP5000 - Page 381

Interleaf EP5000/EP4000 TROUBLESHOOTING
97.04.01
T-106
1156SBT040302A
2) Main Relay Turns ON But the Control Panel Gives No Display.
Relevant Electrical Parts
D Power Supply Unit PU1
D Control Panel UN1
D MSC Board PWB-B
D Power Supply Board PWB-C
1156C21TAA
Step Check Item Result Action
1
Is the voltage across PJ22-2 on PU1
and GND DC5V?
YES
Check the wiring between PU1 and
UN1.
NO Change PU1.
2
Is the voltage across PJ21-2 on PU1
and GND DC5V?
YES
Check the wiring between PU1 and
PWB-B.
NO Change PU1.
3
Is the voltage across PJ3C-1 on PWB-
C and GND DC24V?
YES
Check the wiring between PWB-C and
UN1.
NO Change PWB-C.
Is the connection between PWB-B and YES Change PWB-B or UN1.
4
UN1 normal?
NO
Correct the wiring or change the har-
ness.