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/diy/ - Do-It-Yourself

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>> No.2039804 [View]
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2039804

Power supply is busted, I've run the piano off my lab power supply and it powers up and runs self diagnostics fine so I'll be using a generic PSU to replace this.
NC is not connected but what is TTL o. Th piano output pin 5? Piano seems to work fine without it and internet tells me it's transistor logic gates



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