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...as you will gather I am no electronics expert but I wonder if anyone cleverer than me could comment on whether it is possible to test and replace a triac, relay or whatever commonly fails in an AM12U module (I have one that just seems unresponsive) and another that repetitively clicks as if its *trying* to switch itself on)
sorry - I've now bothered to open up the two malfunctioning modules - the rattling one just had a loose spring on the contact arm which I have reconnected but the dud one has black burn marks all round the inside of one corner around a large rectangular component 25x8x18mm - is this a relay or the "triac"?? and, more to the point, is it replaceable? There is also some heat damage to the casing of a medium sized component - blue 6mm vertical disc thats one resistor away from the large component.
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