A new clock mod for cd723

apolon34 · 25th November 2004, 09:43 PM

Hi,

I was looking at the saa7378 datasheet and I saw that we can use a 33.8688Mhz clock with it. it allows to disable the saa7378 internal pll, that is a good thing.

You have to put the pin13 (selpll) of the saa to ground. To do this, i cut the line and i solder pin 12 (gnd) and 13 of the saa together.

I removed the quartz, the 2 22pF caps and plug the oscillator.

And... IT WORKS !!

if someone who's already using a 8.4672Mhz tentlab oscillator wants to try the mod, It would be nice to see the results.

jkeny · 27th November 2004, 07:57 PM

Does it improve sound? Is it wothwhile?

John

apolon34 · 27th November 2004, 11:17 PM

yes it improves the sound, at least as much as a standard clock update. There are more details and the highs are sweeter. the stereo image is better too.

My 723 starts to sound really good

25th November 2004, 09:43 PM	#1
apolon34 diyAudio Member Join Date: Jan 2004 Location: rouen	A new clock mod for cd723 Hi, I was looking at the saa7378 datasheet and I saw that we can use a 33.8688Mhz clock with it. it allows to disable the saa7378 internal pll, that is a good thing. You have to put the pin13 (selpll) of the saa to ground. To do this, i cut the line and i solder pin 12 (gnd) and 13 of the saa together. I removed the quartz, the 2 22pF caps and plug the oscillator. And... IT WORKS !! if someone who's already using a 8.4672Mhz tentlab oscillator wants to try the mod, It would be nice to see the results.

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27th November 2004, 07:57 PM	#2
jkeny Banned Join Date: Feb 2007 Location: Dublin	Does it improve sound? Is it wothwhile? John

27th November 2004, 11:17 PM	#3
apolon34 diyAudio Member Join Date: Jan 2004 Location: rouen	yes it improves the sound, at least as much as a standard clock update. There are more details and the highs are sweeter. the stereo image is better too. My 723 starts to sound really good