Contax RTS shutter speed dial
The RTS I have works except that when the shutter speed dial is turned, it doesn't change speeds. It fires at the same speed - which I assume is a default speed when it can't tell what speed it has been set to. Bulb doesn't work either. The contact springs are all touching the PCB contact tracks and they look clean. There is no nasty stuff under the top cover that would make me think there was a problem with corrosion or oxidation. I have a second RTS I bought for parts and to work on before the "good" one. Since there's no documentation regarding troubleshooting this type of issue - or anything besides parts assembly - so I'm stuck. It is unfortunate because it is in great condition except for this one issue. If I had the board layouts and expected metering values, I could see if there's a short or other electrical problem, but I don't see anything to even get to a starting point. Anyone have suggestions? Thanks