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on Jun 15, 2024 13:06:54 GMT
Posted: Jun 15, 2024 13:06:54 GMT
Hey, I’m new to photography and have been using my Yashica Fx-3 super 2000 for 3 months and after I changed film and changed ISO the light meter isn’t working. It doesn’t seem to be a battery problem because all 3LEDs are lighting up for a half second when half pressing the trigger. Has anyone ever encountered this problem?
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Status: Long, long time Contax and Yashica user; glad to be here and hope to contribute.
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on Jun 17, 2024 11:28:12 GMT
Last Edit: Jun 18, 2024 17:46:19 GMT by biggles3
Hello samygphotos and welcome to the Forum! That's a new one - can you kindly confirm that when you switch the aperture of the lens from minimum to maximum, you still get all three LEDs alight at both extremes? I'm presuming from your question that after the three light up initially for that brief moment, they are no longer visible, giving you no idea as to the optimum aperture/shutter speed settings? I have just checked my camera and I have got all three lit very briefly covering three consecutive aperture settings - but either side of these apertures, a single LED is lit. It sounds like your A/D Conversion is not working which implies that it's not receiving a correct signal from its circuit. It might be worth trying to find a repair manual online - I think the FX-3/FX-7 is the most easy to find and I suspect that the meter actuation may be common to all FX-3 variations - and see what sort of contact is made by the ISO dial on to its corresponding circuit board. As it was only by moving the ISO dial that the problem occurred, it may be little more than some dirt or corrosion on the part of the circuit board activated by changes to the ISO setting. This would be a better outcome than a failure of a circuit component which would be terminal; disassembly of the top plate is pretty straightforward on the various FX-3 models. There may even be a disassembly instruction video on YouTube... I'm not a camera technician, so you might find more expert opinions here or elsewhere online but my instinct is slight corrosion on the PCB - out of curiosity, have you returned to the original ISO setting to see if that works OK? Sorry I can't be more helpful. |
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Status: Failed treatment for L.B.A. and G.A.S,
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on Jun 18, 2024 16:07:46 GMT
Posted: Jun 18, 2024 16:07:46 GMT
The forum has a posted copy of the FX-3/X-7 repair manual, here: yashica.boards.net/thread/1296/contax-yashica-repair-assembly-manualsIf anyone had tried accessing it, there was some unknown error, but it is working again. As biggles3 noted about dirty contacts, I've had success with rigorously and quickly twisting the dials to encourage the contacts to 'self clean' themselves, so that would be my first instinct to try, along with making sure your battery is supplying enough volts and amperage to meet the required threshold for the circuit to work properly. I'd always advice using silver oxide batteries instead of the alkaline variants too. They have better power curves and remain more consistent over time, and the voltage drop-off to being 'dead' is relatively short & quick. Pages 7-10 of the repair manual gives a diagnostics overview and repair method for the metering circuit, if it really comes down to opening the body to access it for cleaning or adjusting values. It will require a sensitive test meter, and a non-metallic driver to trim the pots with, although the drawing doesn't specify what tip shape is needed, or even if it has a place for one. I have a cache of bamboo skewers I use to push/pull or can easily cut to shape for similar tasks, so those might be helpful. |
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