Re: No sound from Yamaha digital piano

I've done both input and output, and got sound on both sides.

Re: No sound from Yamaha digital piano

If you could educate me, why would a capacitor block DC, and why would I want to?

The DACs are getting voltage and I assume they are getting clock signal from the CPU just fine. I probed the opamps and injected analog signal into their outputs and I got sound, so that leaves the DACs being the problem. I'm not sure how they would both go bad, but it is 20 years old and it was pre-owned so I don't know how long it was operating on mono. I think I'm going to order a couple of these ancient DACs and try to solder them on.

Re: No sound from Yamaha digital piano

I tried probing the DAC output pin using the aux in cable. There was no sound. I was using a resistor though instead of a capacitor... oops. Would that make a difference? Can I conclude from not hearing any signal from the output pin that the DAC is bad? That would mean both are bad, one for each channel.

Re: No sound from Yamaha digital piano

Do you mean use an audio cable to probe around, and connect the ground section of the cable to the instrument's ground? Should I use a resistor in series for this? It's hard to tell what level of damage I'm dealing with poking around like this

Hi All,
I have a used Clavinova CVP 209 that isn't playing any sound from the keys or memory, neither on headphones nor line out. The speakers work OK from line in, and the rest of the lights and screen seem to work just fine.

I have tried doing a factory reset by holding down the top key and turning it on, but that doesn't help. I did the RAM/ROM checks and they're OK. I checked the volume potentiometer and it seems OK (works with line in audio). I'm thinking it might be faulty DACs from the synth board (IC 28 and 29: ) or op amps. Not sure how to narrow it down more. I've...

Re: New Members - please post your introductions here

Might I be an advanced spam bot?