Philips CD-951: Tent Labs XO3 and SPDIF reclock plus I2S out

[Hercules]

Originally posted by Guido Tent

Hi

The PCF puts out SPDIF, I have the pinout at my lab, will check tomorrow

Hi Guido, finally see you but everything were done already. The SPDIF stream was extract from Pin 13 of PCF2705.



Just one more thing, can you check the XO in this photo is genuine or not, as the wording on it a bit difference from the photo on website

"jiter" instead of "jitter"
"TENT Eng" instead of "TENT ENG"


but I still can found 3 blue dot at the bottom of the XO can.

[QSerraTico_Tico]

Originally posted by Hercules



Hi Guido, finally see you but everything were done already. The SPDIF stream was extract from Pin 13 of PCF2705.

Just one more thing, can you check the XO in this photo is genuine or not, as the wording on it a bit difference from the photo on website

"jiter" instead of "jitter"
"TENT Eng" instead of "TENT ENG"


but I still can found 3 blue dot at the bottom of the XO can.

low jiter, LOL

[QSerraTico_Tico]

Originally posted by philpoole
Sorry, I didn't answer your question fully. I nearly did, but editing removed some of the information.
The PCF2705 is ideal for sniffing off both I2S and SPDIF. You'll probably need to lift the leg for the SPDIF output, as you want to reclock and then continue the signal to the output.
The SAA7310 is not used on this player to provide SPDIF output.

I2S comes from SAA7310 and is converted to SPDIF in PCF2705 IC

[avr300]

I have an XO here - genuine - with the same spelling error.

[QSerraTico_Tico]

Originally posted by avr300
I have an XO here - genuine - with the same spelling error.

Funny!

[ronal]

Hi
I don’t have so much idea regarding this subject. Just I suggest you to take steps accordingly.

[Guido Tent]

Originally posted by Hercules


Just one more thing, can you check the XO in this photo is genuine or not, as the wording on it a bit difference from the photo on website

"jiter" instead of "jitter"
"TENT Eng" instead of "TENT ENG"

nice work, good to see all is OK. You may want to rotate the board over 180 degrees to shorten all wiring

The text on the oscillaters is a misprint from my Asian manufacturer, and Tent Eng(ineering) was my earlier company when I started this all. The XO's are in production for nearly 10 years now, unchanged that is.

best

[Hercules]

thanks for your suggestion, will try to do it next time when I open up the player..

the major difference between XO3 and XO3.2 is shunt regulator only, or more than that??? and divided by two on XO3 is workable or not?? better to use the div. by 2 on XO3 to feed TDA1547 then the SAA7350 div by 2 ?

[Hercules]

Just post some update on my CD951, I just added a seperate Power Supply for XO3, at the same time, re-mount and rotate the XO3 by 180 degree, to make all cabling shorter and neat.

Thanks for Guido Suggestion.

[philpoole]

Hi Hercules,

Good work!
So, are you just using the CD951 as a transport, or do you ever use its DAC output? If not, then why not disable the power to everything after the 7310? This would make the job of the main regulation easier, and remove now redundant noise from the power rails.

I did this on my CD940, and it was quite easy to do. In fact, I just snipped a few choice safety resistors which are on the power lines to each individual circuit. A careful blob of solder on each snipped leg will bring the circuit back to life - if I'd ever want to do that to a bitstream DAC

By the way, looking at your photos, this will sound a dumb question, where's the rectifier in your new power supply? Is it that small rounded rectangular thing just next to the transformer? Must be I suppose.


Also, the most important questions: how does it sound? Are you happy with the mod? Will you do more?

Cheers,
Phil