RZ67: Dead Electronic Release, Burned Diode and Moisture Damage
Originally posted on Instagram. Notes from the repair bench, kept here as a searchable archive. View the original on Instagram
Repair on Mamiya RZ67. This RZ67 came into the shop with mechanical release working, but electronic release inoperative. After removing one of the side covers, I discovered a damaged diode (photo four shows close up of the part in the foreground). When I see a damaged/burned component, my first thought is why did this happen. In this case, after replacing the diode, the standby current in the camera was 2 mA and not enough voltage to reliably fire the release solenoid. On further inspection I found moisture damage to the circuit board and components so had to replace it completely, no simple diode replacement!
