Dear friends,

I did this before, adding an SPDIF to a second or third generation,

Sony-based player, using a Ti DIT4192 transmitter.

See this link how I did it with a Sony-based Nakamichi OMS-5EII 17 years ago (Really? Gosh!)

The Nak still plays my CD's every day!

Everything seems to be there in the Sony CDP-101 to achieve SPDIF-Out:

Data / Bitclock / R-L Clock to feed a DIT4192 for converting to SPDIF.

BUT:

The DIT 4192 needs a standard 19.9344 mHz frequency.

Normally no problem, as players with Sony circuits have a divideable of this frequency on board.

As one example, early players used 4.2336mHz (1/4) or 8.4672mHz (1/2), directly provided by a crystal.

Also 19.9344 mHz became very quickly common, or later multiples of it, like 67,7376 mHz.

So a Flip-Flop can be used to derive 19.9344 mHz from the mentioned frequencies and as far as I know

4.2336mHz and its multiples are a must to make a player work.

But being a first generation model, it looks like the Sony CDP-101

does not use a crystal with any of those frequencies.

The service manual

https://elektrotanya.com/sony_cdp-101.pdf/download.html

states the Xtals X501 and X502 are 8.6mHz and 35.022mHz - both frequencies are not multiples of 4.2336mHz

So I assume the base frequency is generated somewhere in the circuitry using PLL.

No hint in the service manual that 4.2336mHz exists (again, AFAIK it must) or where to measure and where grab it.

Does anyone know where 4.2336mHz can be found in this player?

BTW, the CDP-101 should trick audiophiles - there is damping above 15kHz and a delay between channels - it makes the CDP-101 sound "bigger".

All the best,

Salar

I did this before, adding an SPDIF to a second or third generation,

Sony-based player, using a Ti DIT4192 transmitter.

See this link how I did it with a Sony-based Nakamichi OMS-5EII 17 years ago (Really? Gosh!)

The Nak still plays my CD's every day!

Everything seems to be there in the Sony CDP-101 to achieve SPDIF-Out:

Data / Bitclock / R-L Clock to feed a DIT4192 for converting to SPDIF.

BUT:

The DIT 4192 needs a standard 19.9344 mHz frequency.

Normally no problem, as players with Sony circuits have a divideable of this frequency on board.

As one example, early players used 4.2336mHz (1/4) or 8.4672mHz (1/2), directly provided by a crystal.

Also 19.9344 mHz became very quickly common, or later multiples of it, like 67,7376 mHz.

So a Flip-Flop can be used to derive 19.9344 mHz from the mentioned frequencies and as far as I know

4.2336mHz and its multiples are a must to make a player work.

But being a first generation model, it looks like the Sony CDP-101

does not use a crystal with any of those frequencies.

The service manual

https://elektrotanya.com/sony_cdp-101.pdf/download.html

states the Xtals X501 and X502 are 8.6mHz and 35.022mHz - both frequencies are not multiples of 4.2336mHz

So I assume the base frequency is generated somewhere in the circuitry using PLL.

No hint in the service manual that 4.2336mHz exists (again, AFAIK it must) or where to measure and where grab it.

Does anyone know where 4.2336mHz can be found in this player?

BTW, the CDP-101 should trick audiophiles - there is damping above 15kHz and a delay between channels - it makes the CDP-101 sound "bigger".

All the best,

Salar

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