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Old 28th September 2010
Lives for gear
mjrippe's Avatar

Yamaha used a strange sort of switching power supply in the SPX90. I have one that was totally shot when I got it. I tried cleaning off all of the brown gunk that appears on these and re-capping it, but it still didn't work. I am simply replacing it with a linear PSU. All you need is +/- 18 volts and +5 volts.