Hi all,
just taking a chance, 1,000 TNetters, among all there may be somebody with a
5 channel amplifier Yamaha DSP A-990.  I like my old machine, 6 years old, a
fantastic sound and video  processor. Happened to short the outputs and blew
most of the 14 power darlington transistors. I have repaired with newer
equivalents and all e-c-b voltages are OK, but 5 seconds after start, there
is a safety relay that switches power off. I can't figure out why and what
the sensors react on. Complicated electronics. Now I just wonder if someone
happen to have such a machine and if there is also someone who have
schematics. Yamaha don't not respond positively on my request, say they have
no service on such a obsolete amplifier.
Regards
Ingemar Hernefjord
SMW

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