Re: Yamaha YPG-625 No Power troubleshooting

Darn, that was spot on. Sometimes I overlook the simplest things

The pad for the dc jack was ripped off probably due to heavy use. A quick jumper and resoldering job fixed it right up.

Appreciate the help greatly!

Hi,

I have this keyboard that I am working on that doesn't power on when connected to voltage. Upon looking at the schematics I believe that the issue is with the power supply circuitry (schematic screenshot and pdf attached). I have poked around the circuit from the DC in jack and for some reason, the two 5v regulators only seem to get around 0.5v in and 0v out. I have tried jumping the power connector to simulate the on switch, but no dice and I get the same readings on the regulators. The fuse is fine and will beep in diode mode. Nothing looks obviously bad or scorched.
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Re: New Members - please post your introductions here

Hi Folks, I'm Julian from Virginia and I own a small repair shop that fixes just about anything.