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Richard D Pierce
 
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Default I need help repairing a Yamaha SPX-90 (power supply is flaky)

In article ,
Sam Lloyd wrote:
Anyone have any idea what might be wrong with mine? The PS is very
"touchy" when adjusting the pot, and the voltages jump up above their
proper levels (I get around 7-8 VDC on the 5V rail, and around 38VDC
on the +/-18). I replaced the electrolytics and one of the
optoisolators, but it's still screwy.


Sounds like it jas nothing to do with the electrolytics or
optoisolators. If it's jumping around when you adjust the pot,
it's a strong hint that the pot itself is flaky.

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| Dick Pierce |
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