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Re: A-143-2 problem

2019-07-07 by man.of.mystery@ntlworld.com

Since it's an intermittent fault (i.e. sometimes works), it could be a dry or cracked solder joint, maybe on something that can get subjected to mechanical stress, like a socket or header pin.

I have an A-106-6 filter, which I bought used. When it arrived, one of the outputs didn't work at all - which happened to be the first one I tried. I resoldered the pins for that socket, which cured it, and it's been fine since.

Dry solder joints are often visibly different to other joints on the board - they might look duller, or more uneven. In my case, the problem one didn't have much solder on it at all, so someone at the factory had an off day.

- Andy

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