Konica Minolta BIZHUB 25E Field Engineering Manual page 250

No. Symptom
20 Unit will not power
up.
What to confirm
1. Is the power cord connected correct
and power switch is turned on.
2. Is the electrical outlet is on?
3. Does the DC output voltages from
the power supply unit to connector
P3 on the main control boar have the
following output?
Pin 1, 2, 3, 4
Pin 14
Pin 5, 6, 7, 8, 11, 13
4. Is the connection between the power
supply unit and the main control
board OK?
5. If you replace the main control
board, the symptom will be fixed.
Countermeasure
Yes Check No.2.
No Connect the power cord and turn the
power on.
Yes Check No.3.
No Connect the machine to a proper
outlet.
Yes Check No.4.
No Replace the power supply.
+24V
+3.4V
GND
Yes Check No.5.
No Reconnect the connection or replace
the harness.
Yes Replace the main control board.
No Replace the machine.
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