Power Supply Trouble - Konica Minolta BIZHUB 163 Service Manual

Field Service Ver. 1.0 Apr. 2007

15. Power supply trouble

15.1 The copier does not turn ON
Step
A malfunction code appears when the power
1
switch is turned ON.
The malfunction is temporarily reset when the
2 power switch is turned OFF and ON with the
Stop key held down.
Power supply voltage check
<Check procedure>
Check voltage across pins of power supply unit
(DCPU) when the power switch is turned ON.
3
• Voltage across CN1DCPU-1 and CN1DCPU-
2 AC0 V when the power switch is OFF
Rated AC voltage when the power switch is
turned ON
Check of output of DC24 V to MFP board
(copier: MFPB)
<Check procedure>
Check voltage across a MFP board (MFPB) pin
4 and GND when the power switch is turned ON.
• Voltage across P110MFPB-1 and GND
• Voltage across P110MFPB-2 and GND
DC0 V when the power switch is OFF
DC24 V when the power switch is turned ON
Check of output of DC24 V to printer control
board (PRCB)
<Check procedure>
Check voltage across a printer control board
5 (PRCB) pin and GND when the power switch is
turned ON.
• Voltage across PJ2PRCB-2 and GND
DC0 V when the power switch is OFF
DC24 V when the power switch is turned ON
Check of output of DC 5 V to printer control
board (PRCB)
<Check procedure>
Check voltage across a printer control board
6 (PRCB) pin and GND when the power switch is
turned ON.
• Voltage across PJ6PRCB-9 and GND
DC0 V when the power switch is OFF
DC24 V when the power switch is turned ON
Check of output of DC5 V to control panel
<Check procedure>
Check voltage across a MFP board (MFPB) pin
7 and GND when the power switch is turned ON.
Voltage across P102MFPB-1 and GND
DC0 V when the power switch is OFF
DC5 V when the power switch is turned ON
Check
15. Power supply trouble
Result Action
YES • Go to step 2.
NO • Go to step 3.
• Perform the troubleshooting pro-
YES cedure according to the malfunc-
tion code.
• Check wall outlet for voltage.
NO • Check power cord for continuity.
• Check power switch.
• Check front door interlock switch
(S3).
• Check right door interlock switch
NO
(S4).
• Change power supply unit
(DCPU).
• Check front door interlock switch
(S3).
• Check right door interlock switch
NO
(S4).
• Change power supply unit
(DCPU).
• Change power supply unit
NO
(DCPU)
• Check MFP board (MFPB).
• Change printer control board
NO (PRCB).
• Change power supply unit
(DCPU)
YES • Change control panel.
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