2 Contax shutter issues - RTS & 137MD
Feb 13, 2022 0:09:18 GMT
on Feb 13, 2022 0:09:18 GMT
Last Edit: Feb 13, 2022 0:11:29 GMT by lumiworx
I seem to have 2 rather odd shutter issues that I haven't run across before, and I'm wondering if anyone has had similar issues and found a fix.
RTS I: When cocking the film advance the shutter will fire shortly after starting the stroke, and occasionally the shutter will even fire twice before the full stroke is complete. There's no tripping the shutter button to get this to happen - it just fires during the advance without any other action. The mirror goes up and returns as expected, there's no locked mechanical levers that I've found while looking under the bottom cover, and there's no extra noises or anything to suggest there's any broken parts... it just acts like the gearing ratio is 'off' or something mechanical isn't getting 'caught'.
137MD: Shutter curtain is stuck in mid-travel at about the 25% point from the left - looking at the open back. The batteries are fresh, the green check light comes on, but when moved into the on position, the light flashes red quickly and constantly until power is shut off. There's a bit of slow 'whirring' noise when the power is on, but it quickly stops after 1 second or so. Unlike the RTS, there's no easy access to the internals by pulling off any bottom cover. I've had something kind of similar happen when the batteries suddenly drop below operating voltage, but normally putting in fresh batteries forces the cycle to complete and stages everything to continue with the next frame -but- that doesn't trigger the flashing red LED from what I remember.
Any ideas?
RTS I: When cocking the film advance the shutter will fire shortly after starting the stroke, and occasionally the shutter will even fire twice before the full stroke is complete. There's no tripping the shutter button to get this to happen - it just fires during the advance without any other action. The mirror goes up and returns as expected, there's no locked mechanical levers that I've found while looking under the bottom cover, and there's no extra noises or anything to suggest there's any broken parts... it just acts like the gearing ratio is 'off' or something mechanical isn't getting 'caught'.
137MD: Shutter curtain is stuck in mid-travel at about the 25% point from the left - looking at the open back. The batteries are fresh, the green check light comes on, but when moved into the on position, the light flashes red quickly and constantly until power is shut off. There's a bit of slow 'whirring' noise when the power is on, but it quickly stops after 1 second or so. Unlike the RTS, there's no easy access to the internals by pulling off any bottom cover. I've had something kind of similar happen when the batteries suddenly drop below operating voltage, but normally putting in fresh batteries forces the cycle to complete and stages everything to continue with the next frame -but- that doesn't trigger the flashing red LED from what I remember.
Any ideas?
