Hello all, this is my first post so bear with me please
I got a Yamaha CDX 480 for free a few days ago, and I did not like the fact that it does not have a coax digital out,
so I was searching for CD player mods and i stumbled across here, been lurking for a few days but registered finally to be able to see the attachements
Anyway, i've been busy digging up datasheets on the various chips on the board, and i've found the most important ones, some i cant find though.
This CD player has a LSI that takes care of most of the functions needed for playback and DAC. The LSI is a matsushita (did i get that right
) MN66271RAM.
I here is a picture from the datasheet:
And the block diagram:
My question is really this: if i want to add a SPDIF output to my machine, do i need to connect it to pin 6? (TX)
What pin should be used for ground? Or can i just use any ground point?
Would it be wise to buy a service doc for this player, or isn't it worth the 25-30 euro's ?
Also, I'd like to change the matsushita caps for either black gates or panasonic FC, which would be the sensible choice?
Last but not least: I'd like to change the opamps, the player has a
JRC/NJR 2068DD dual opamp for the main channels datasheet
I have a AD8620, a BB OPA2132, 2604, 2227 and a 2228.
which one would be best? I think the 8620, any idea's?
Lots of questions from this new user, thanks in advance for answering them

I got a Yamaha CDX 480 for free a few days ago, and I did not like the fact that it does not have a coax digital out,
so I was searching for CD player mods and i stumbled across here, been lurking for a few days but registered finally to be able to see the attachements

Anyway, i've been busy digging up datasheets on the various chips on the board, and i've found the most important ones, some i cant find though.
This CD player has a LSI that takes care of most of the functions needed for playback and DAC. The LSI is a matsushita (did i get that right
I here is a picture from the datasheet:
An externally hosted image should be here but it was not working when we last tested it.
And the block diagram:
An externally hosted image should be here but it was not working when we last tested it.
My question is really this: if i want to add a SPDIF output to my machine, do i need to connect it to pin 6? (TX)
What pin should be used for ground? Or can i just use any ground point?
Would it be wise to buy a service doc for this player, or isn't it worth the 25-30 euro's ?
Also, I'd like to change the matsushita caps for either black gates or panasonic FC, which would be the sensible choice?
Last but not least: I'd like to change the opamps, the player has a
JRC/NJR 2068DD dual opamp for the main channels datasheet
I have a AD8620, a BB OPA2132, 2604, 2227 and a 2228.
which one would be best? I think the 8620, any idea's?
Lots of questions from this new user, thanks in advance for answering them