clock upgrade Marantz cd7300

farl · 1st May 2006, 04:55 PM

Is there a benefit if i well upgrade the clock for this CDP? Cause it is connected to the PPL & VCO before it is distributed to the digital cicuit.
Or is it possible to connect the clock directly to the CD decoder and terminate the PPL & VCO.
PPL & VCO is controlling the pitch of the CDP.

Help please..........

Thanks,
Farl

farl · 2nd May 2006, 06:29 AM

here is the block diagram:

6h5c · 2nd May 2006, 08:45 AM

Hi Farl,

The clock distribution in the CD7300 is quite complex. Just changing the clock will not bring you much benefit, it has been discussed elsewhere. If you do a search on this (and other) forum, you will find some more info.

Regards,

Ray.

farl · 2nd May 2006, 10:00 AM

Thanks Rey.

What about if I will cancell the clock input of the DAC and change it to a low jitter clock with the same freq. Is it possible?

Farl

6h5c · 2nd May 2006, 12:51 PM

Quote:

Originally posted by farl
Thanks Rey.

What about if I will cancell the clock input of the DAC and change it to a low jitter clock with the same freq. Is it possible?

Farl

Hi Farl,

No, that won't work. The decoder and DAC need the same clock, it needs to be synchronious. Same goes for the MP3 and CD-text decoder chips that are aso attached to the clock signal. The thing that might have a positive effect is to get rid of the VCO and PLL and insert a stable clock there, with a separate PSU. You will lose the pitch control feature though.

Regards,

Ray.

farl · 2nd May 2006, 02:03 PM

Hi Ray,

Actually this is my first option, to bypass the PPL & VCO and connect a kwack clock after this.
Thank you so much for your great help. I really appreciate it.

Cheers......
Farley

6h5c · 2nd May 2006, 02:11 PM

You're welcome, Farl.
I hope it will give an audible result. Positive result that is

Regards,

Ray.

Ruach · 2nd May 2006, 03:06 PM

I had this player sometime back. The CD7300 does need a lot of work to make it sound really good and the clock part is quite tricky. Good luck

farl · 2nd May 2006, 04:06 PM

Hi Ruach,
Can you please give us some idea of what you did with this player, so that I can follow that also?

Thanks,
Farley

1st May 2006, 04:55 PM	#1
farl diyAudio Member Join Date: May 2005 Location: Dubai, UAE	clock upgrade Marantz cd7300 Is there a benefit if i well upgrade the clock for this CDP? Cause it is connected to the PPL & VCO before it is distributed to the digital cicuit. Or is it possible to connect the clock directly to the CD decoder and terminate the PPL & VCO. PPL & VCO is controlling the pitch of the CDP. Help please.......... Thanks, Farl

2nd May 2006, 08:45 AM	#3
6h5c One Seriously Addicted to Audio and Electronics diyAudio Member Join Date: Apr 2004 Location: Heerhugowaard	Hi Farl, The clock distribution in the CD7300 is quite complex. Just changing the clock will not bring you much benefit, it has been discussed elsewhere. If you do a search on this (and other) forum, you will find some more info. Regards, Ray. __________________ Gonna buy my little girl a pink soldering-iron The new DOS-CFP board is out!

2nd May 2006, 02:11 PM	#7
6h5c One Seriously Addicted to Audio and Electronics diyAudio Member Join Date: Apr 2004 Location: Heerhugowaard	You're welcome, Farl. I hope it will give an audible result. Positive result that is Regards, Ray. __________________ Gonna buy my little girl a pink soldering-iron The new DOS-CFP board is out!

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2nd May 2006, 10:00 AM	#4
farl diyAudio Member Join Date: May 2005 Location: Dubai, UAE	Thanks Rey. What about if I will cancell the clock input of the DAC and change it to a low jitter clock with the same freq. Is it possible? Farl

2nd May 2006, 02:03 PM	#6
farl diyAudio Member Join Date: May 2005 Location: Dubai, UAE	Hi Ray, Actually this is my first option, to bypass the PPL & VCO and connect a kwack clock after this. Thank you so much for your great help. I really appreciate it. Cheers...... Farley

2nd May 2006, 03:06 PM	#8
Ruach diyAudio Member Join Date: May 2003 Location: Singapore	I had this player sometime back. The CD7300 does need a lot of work to make it sound really good and the clock part is quite tricky. Good luck

2nd May 2006, 04:06 PM	#9
farl diyAudio Member Join Date: May 2005 Location: Dubai, UAE	Hi Ruach, Can you please give us some idea of what you did with this player, so that I can follow that also? Thanks, Farley

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