Minolta CF910 Service Manual page 405

10. C30A0 (Polygon Motor's Failure to Turn)
C30A1 (Polygon Motor Turning at Abnormal Timing)
• Polygon Motor
• Polygon Motor Drive Board
Step
1 Is the malfunction code C30A0 shown?
2 Does the voltage across PJ9IA-3 on
PWB-I and GND remain DC5V when the
Start key is pressed?
3 Does the voltage across PJ9IA-3 on
PWB-I and GND remain DC0V when the
Start key is pressed?
(2) C02 , C32
Neutralizing/Static Charge/Developing Bias Coronas Malfunctions)
1. C0200 (PC Drum Charge Corona Failure)
C0201 (PC Drum Charge Corona Connection Detection)
C0210 (Image Transfer Corona Failure)
C0240 (Developing Bias Failure)
C0241 (Developing Bias Connection Detection)
• High Voltage Unit 1 HV1
• High Voltage Unit 2 HV2
• High Voltage Unit 3 HV3
C0200/C0201
Step
1 Is the housing dirty, the high-voltage con-
tact deformed, or the wire dirty or snapped
off?
2 Does the voltage across PJ9IB-9 on
PWB-I and GND remain DC0V after the
PC Drum Charge Corona output has been
turned ON?
Possible Defective Components
Check Item
(PC Drum Charge/Image Transfer/Paper Separator/Charge
Possible Defective Components
Check Item
• Master Board PWB-I
Result
NO Go to step 3.
YES Change the PH Assy as a set.
NO Change PWB-I.
YES Change the PH Assy as a set.
NO Change PWB-I.
• High Voltage Unit 4 HV4
• Master Board PWB-I
Result
YES Clean or change the defective
part.
YES Change HV1.
NO Change PWB-I.
T-39
Action
Action