C004E: Power Supply Cooling Fan Motor Malfunction; Power Supply Section - Minolta Di152 Service Manual

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C004E: Power Supply Cooling Fan Motor malfunction

Power Supply Cooling Fan Motor (M4)

POWER SUPPLY SECTION

Power Supply
Cooling Fan Motor
Step Check
1 Power Supply Cooling Fan Motor
(M4) turns when the Power Switch is
turned ON.
2 The following voltage is supplied to
the Power Supply Cooling Fan Motor
(M4).
<Check Procedure>
Check voltage across a Master Board
(copier: PWB-A) pin and GND when
the Power Switch is turned ON.
• Voltage across PJ19A-1 and GND
DC8 V during rotation at deceler-
ated speed
DC24 V during rotation at full
speed
3 The following voltage is supplied to
the Power Supply Cooling Fan Motor
(M4).
<Check Procedure>
Check voltage across a Master Board
(copier: PWB-A) pin and GND when
the Power Switch is turned ON.
• Voltage across PJ19A-3 and GND
DC0 V when energized
Relevant Electrical Parts
Master Board (copier: PWB-A)
Result
NO • Check for overload.
YES • Change Power Supply Cooling Fan
Motor (M4).
NO • Change Power Supply Cooling Fan
Motor (M4).
YES • Change Master Board (copier:
PWB-A).
T-25
PWB-A
Master Board
4022T527AA
Action