Total Counter Malfunction; Optics Emain Communication Failure - Ricoh FT4430 Service Manual

91 TOTAL COUNTER MALFUNCTION

- Possible Causes -
+ Total counter does not cycle.
- Action -
Is + 5 V supplied at CNI03-5?
I
Y N
I
Replace the operation panel.
Is +24 V supplied at CN103-4?
Y N
I
Is there +24 V at CNI03-3 of the main board?
Y N
I
I
Check the Vaa power supply. Replace the dc power supply if it is
not correct. Replace the main board if Vaa is all right.
Replace the operation panel.
Does CNI 03-5 pulse from + 5 V to O V at the start of the copy cycle?
Y N
I
I
Replace the total counter.
Replace the operation panel. If the problem still exists, reinstall the operation
panel and replace the main board.
93 OPTICS < = > MAIN COMMUNICATION FAILURE
- Possible Causes -
+ Data communication error between the main control circuit and the optics
control circuit.
- Action -
Replace the main board.
11-27
16 April '88