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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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C - Audio slave amp ...
Anybody by any remote chance have a schematic copy for a C - Audio RA 1001
slave amp ? Drawn a blank from all the usual places. Looks as though it has been stored somewhere cold and damp, although dry enough now. Basically, it won't come out of 'protect' although there seems to be nothing wrong fundamentally with either channel. Both channels have good output, with no DC offset, as far as the output relays. There is another relay over at the mains input side of things that looks like it shorts a bloody great resistor, so inrush limiting I guess. All three relays remain stubbornly off, and the protect light stays on. I can't read any volts at any of the three relay coils, and none of the pins appears to be grounded, so they are not high-side switched. So may be something as simple as a missing rail, but hard to follow print around as it's double sided, and fairly crowded ... Arfa |
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