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Repair Yamaha SPX90

Yamaha SPX90 psu

Yamaha SPX90 psu

Got a Yamaha SPX90 here for repair. Not working at all. Some parts on PSU look suspect, some are wrong and some are missing.

1. suspect resistor. Not even that the resisitor may be damaged, but there is a green substance on it which don’t look good.

Yamaha SPX90 psu

Yamaha SPX90 psu

2. Spotted that someone was in here and tried to repair it and tested some parts (diodes). But this is the wrong one. This should be a schottky diode.

Yamaha SPX90 psu

Yamaha SPX90 psu

works…;) Here are more pics for you.