sony CDP-501 and spdif output

[Kathod]

I have an old Sony CDP-501 (1986) but it doesn't have digital output. It just have a connector called "accessory"... but I can't find any spdif signal on it. What to do?
Does somebody know what is the digital output format on this connector? Is it possible to convert it easely to spdif?
Thank you for your help and sorry for my bad english!

 

[TDA1540]

Does anyone know anything about this player?
Search only came up with the post above.
Google did not help either.

 

[TDA1540]

found something.

it was introduced in the summer of 1984

 

[TDA1540]

I came across this japanese site

http://cdp101.hp.infoseek.co.jp/cdp501es/cdp501es.html

since my japanese is restricted to hai and sayonara,I can merely look at the pictures.However,the older 101 pcbs look similar to the pcbs in my 501,meaning it would also be a non oversampler!
If this could be confirmed by someone able to read japanese,it would be very nice!

 

[Malefoda]

Any news on this cdp?
BTW, how does it sound?

 

[Steerpike]

I have one, bought it new in 84.
It is definately non oversampling & shares one DAC between channels.
It predates the 'invention' of SPDIF and so carries no data anywhere internally that is directly compatible with SPDIF.
Adding SPDIF would be a fairly substantial project.

 

[Malefoda]

As for me I was wondering if this player is worth some mods, I've read some of these old Sony sound "analog" and are very well built.
And if it can outperform "foot-tapping-wise" my Philips DVP5500S or my former well modded CD53 Marantz...
(to match an Aura VA100 and B&W DM4).

Thanks!
Matthieu