Sony CDP-101 - adding S/PDIF-Output - looking for 4.2336 base frequency

[rfbrw]

I think we are missing something fundamental here. In the CDP-101 it calls the shots. You march to the beat it sets. It doesn't care that you have a 16.9344MHz crystal. Either you give what it needs or you track what it gives.

 

[Salar]

Your quote from post 52:

Philips get around the different clock domains by using a PLL/VCXO slaved to CLOX (96Fs) to generate the clock XTAL for the CX7934. Problem solved, just copy Philips.

Clox is 4.2336.
https://elektrotanya.com/philips_cd200_sm.pdf/download.html#dl
The pictured clock generates 16.9344 and 4.2336. I don't understand which fundamentals are missing.

 

[rfbrw]

The CDP-101 is not Philips therefore the circuit has to be adapted to suit the Sony. The CDP-101 doesn't care about 42336 or 169344. The system clock in the Sony is 8.6436MHz and that is what must be accounted for.

 

[Salar]

Are you in the wrong thread or is IC SN74LS624N pin 5 ( A813 XTAL ) not a clock output of 8.64MHz, feeding the CX7934 at pin 16?
Please. check the linked CD-200 service manual pages 84 and 86.
And i´sn't 8.64MHz the base frequency the CDP-101 runs on? See CDP-101 SM.

 

[rfbrw]

Guess I must be.

 

[rfbrw]

Your grand plan is to run the DIT off the 'superclock' and remove the crystal from the Sony and replace it with a VCO circuit? Must be the great leap backwards . Don't think there will be clones on eBay any time soon.

 

[Salar]

Once again: The grand plan is from you and was originally executed by Philips.
The "Superclock" is just a byproduct, it lays in a box for a decade.
So instead of being sarcastic present the math behind the leap backwards.