Minolta CF910 Service Manual page 414

C3700 (Optical System Cooling Fan Motor Malfunction 1: Front)
C3710 (Optical System Cooling Fan Motor Malfunction 2: Rear)
C3720 (Optical System Cooling Fan Motor Malfunction 3: Original Surface)
• A/D Converter Board PWB-B
• IR Control Board PWB-C
• IR Cooling Fan Motor 1 M24
<Troubleshooting Procedure>
C3700
Step
1 Does M24 start to turn when the Start key
is pressed?
2 Does the voltage across PJ6B-3 on PWB-
B and GND remain DC0V when the Start
key is pressed?
C3710
Step
1 Does M25 start to turn when the Start key
is pressed?
2 Does the voltage across PJ6B-6 on PWB-
B and GND remain DC0V when the Start
key is pressed?
C3720
Step
1 Does M2 start to turn when the Start key
is pressed?
2 Does the voltage across PJ15C-8 on
PWB-C and GND remain DC0V when the
Start key is pressed?
Possible Defective Components
Check Item
Check Item
Check Item
T-48
• IR Cooling Fan Motor 2 M25
• Original Glass Cooling Fan Motor M2
1154C26TAA
Result
NO Check for loose connector.
YES Change M24.
NO Change PWB-B.
Result
NO Check for loose connector.
YES Change M25.
NO Change PWB-B.
Result
NO Check for loose connector.
YES Change M2.
NO Change PWB-C.
Action
Action
Action