P-3: Ng (Pc Drum Failure; P-4: Ng (Surface Potential Detection Sensor Failure; P-5: Ng (Aidc Sensor Failure - Minolta CF910 Service Manual

(3) P-3: NG (PC Drum Failure)

Step
Is the VO value correct as checked with
"Copying Status" available from "Machine
Adjust"?

(4) P-4: NG (Surface Potential Detection Sensor Failure)

Step
1 Is Surface Potential Detection Sensor
UN22 installed properly?
2 Is the UN22 detection window seriously
contaminated?
3 Is the UN22 connector plugged in cor-
rectly?

(5) P-5: NG (AIDC Sensor Failure)

Step
1 Is the Developing Unit correctly pressed in
position?
2 Is the AIDC Sensor installed properly? Is
there any connection left loose?
3 Is the ATDC Sensor window dirty with
developer?
4 Does the ATDC Sensor output value
change when adjusted to 4.0V when it is
varied with the UP/DOWN key?
Check Item
Check Item
Check Item
T-94
Result
NO Change the VO Sensor.
Result
NO Reinstall UN22.
YES Clean the detection window.
YES Change UN22.
NO Reconnect the connector.
Result
NO Press the unit into position.
YES Reinstall the sensor properly.
YES Clean the sensor window.
YES Change the ATDC Sensor.
NO Change UN20.
Action
Action
Action