Re: AVO VCM163 - Some faults I have had
I would like to re-iterate the fault advice regarding wires trapped under mounting pillars.
My VCM163 had an odd fault when I got it. The Vg was definitely very low, if not zero, at all settings. It turned out to be the wire from the Vg circuitry trapped under a mounting pillar en-route to the switches. Over time the insulation was crushed and a short developed.
Finding the location of a short to earth can be hard, but if you can make or borrow a low-ohmmeter (say 0-100 milliOhms) it makes the job a lot easier. Mine came from an auction at about £10 or £15 and has been invaluable for finding shorted power supply decoupling caps on tightly packed circuit boards.
- Jeremy
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