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Sunday repair challenge - a broken Yamaha NP-30 piano that stopped producing any sounds, amp seems ok, speakers pop when turning off, too. Voltages to the logic board look good. Digging deeper with the oscilloscope…
Sunday repair challenge - a broken Yamaha NP-30 piano that stopped producing any sounds, amp seems ok, speakers pop when turning off, too. Voltages to the logic board look good. Digging deeper with the oscilloscope…
Yay it still works internally. Sound gets generated (measured at amp input line) and MIDI also operates as it should. Fault is in the amp.