Hello
I have a Yamaha yp-40 Clavinova piano, I include the schematic, it's the first one of that type, so I would keep it.
There is a UPC610D 10 bit d/a converter, is there a better d/a converter replacement to replace the UPC610D ?
I include the UPC610D spec sheet.
To improve the sound I will also replace all the NJM4558 opamp by better ones.
Thank
Bye
Gaetan
I have a Yamaha yp-40 Clavinova piano, I include the schematic, it's the first one of that type, so I would keep it.
There is a UPC610D 10 bit d/a converter, is there a better d/a converter replacement to replace the UPC610D ?
I include the UPC610D spec sheet.
To improve the sound I will also replace all the NJM4558 opamp by better ones.
Thank
Bye
Gaetan
Attachments
![yamaha_yp-40_digital_piano_sch[1]..jpg](/community/data/attachments/475/475729-1f135844bf2ecded774da8748a7d0969.jpg)
Wow! This is old-school!
Anyhow, it seems to me it is not just the UPC610 which is the DAC. The mulitiplexer after it is also set up as a R-2R DAC in a clever arrangement.
So you can not replace just the UPC610 chip, you would have to replace the whole DAC section. And I do not think there is an off the shelf chip that would drop right in.
I'd say keep it as it is. It's vintage!
Anyhow, it seems to me it is not just the UPC610 which is the DAC. The mulitiplexer after it is also set up as a R-2R DAC in a clever arrangement.
So you can not replace just the UPC610 chip, you would have to replace the whole DAC section. And I do not think there is an off the shelf chip that would drop right in.
I'd say keep it as it is. It's vintage!
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