Minolta Di 620 Manual page 289

20) C0F32 : ATDC Sensor UN4 Failure
C0F33 : Abnormally Low T/C as Detected by ATDC Sensor UN4
C0F34 : T/C Recovery Failure as Detected by ATDC Sensor UN4
ATDC Sensor UN4
C0F32, C0F33, C0F34
Step
1 Are PJ8A and CN23 plugged securely into
PWB-A?
2 Does the voltage across PJ8A-10B on
PWB-A and GND fall within the range of
DC0.2V to DC4.5V during a copy cycle?
Relevant Electrical Parts
Check Item
Master Board PWB-A
Result
NO Plug them in securely.
YES Change PWB-A.
NO Change UN4 and developer and then run
the F8 and F5 operations, in that order.
T-74
1155C24TAB
Action