Re: Circuit tracing - zener, or not zener?
It would be worth taking a magnifier out and seeing if you can read anything printed on it. Does it make sense for there to be a Zener at that point in the circuit ? Failing that I'm afraid you're right, all you can do is put some volts on it and see. Don't get too carried away of course - it'd be a shame to destroy the device in the act of trying to identify it.
Cheers,
GJ
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