Code C12A8 Di620

[Juelis]

Hi guys.

I'm a minolta di620 with code C12A8.
Someone would have to give me a hint?

Thanks! ;)

[albasoul06]

The service manual indicates a defective PWB-B when experiencing 12xx codes. If replacing PWB-B did not resolve the problem then.................
Incorrect firmware installed in the machine.