Clocking the CDM-Pro2

Elberoth · 25th September 2006, 07:12 PM

Anyone have had any expirience with doing that ?

I'm torn between LC Audio X03, Telt Labs X03, AudioCom Clock 3 and Trichord Clock 4 (and their respective power supplies).

Any ideas ?

loddie · 25th September 2006, 11:50 PM

Not to hijack the thread, but has anyone added wordclock input to the CDpro2?

apolon34 · 26th September 2006, 02:03 PM

Hi,

I made something like that using a x3 clock multiplier available in the market.

I made a tweak on the cd-pro2 to make it run from a 33.8688Mhz clock and then feed my 11.2896Mhz DAC clock to the multiplier and then to the cd-pro2.

it works perfectfully !

Peter Daniel · 26th September 2006, 02:21 PM

Quote:

Originally posted by apolon34
I made a tweak on the cd-pro2 to make it run from a 33.8688Mhz clock

Can you provide some details of that tweak?

That would be very useful for my ML31.5 transport that uses CDM12 IND with 33.8688Mhz clock which is not compatible with CD-Pro2 (for mechanism swaping).

apolon34 · 26th September 2006, 07:29 PM

Hi,

The tweak is very simple, I just tied the SELPLL input pin of the SAA to ground. Originally, it has a pull-up resistor to VCC so you can leave it in place without problems and without the need to cut traces.

Lexluthor · 27th September 2006, 09:38 PM

Quote:

Originally posted by apolon34
Hi,

The tweak is very simple, I just tied the SELPLL input pin of the SAA to ground. Originally, it has a pull-up resistor to VCC so you can leave it in place without problems and without the need to cut traces.

I guess you solder the external clock where the original oscillator is mounted.

How did you remove the original crystal oscillator from the CD-PRO2 PCB? The picture shows how it is done for a CDM12 IND.

Could you mail a picture of the mod on CD-PRO2?

Peter Daniel · 27th September 2006, 10:28 PM

It's been described here; http://www.diy-high-end.com/cd/page25.html

joeling39 · 28th September 2006, 01:12 AM

Hi,

This was what I did. I pulled out the 8.xxx mhz oscillator & soldered the leads of the aftermarket clock to the respective points shown in the pic.

Regards,
Joe Ling

PS : The clock used is a kwak clock 7

apolon34 · 28th September 2006, 06:39 AM

I removed the original xtal completely.
For that you need to unsolder the 4 pads of the original crystal.

An improvement is that you don't need to remove the two caps near the crystal cause the 4 pads package makes a bridge between the caps and the SAA.

for the ground, I juste scratched a bit the pcb to see the copper and then soldered the ground on it.

Lexluthor · 28th September 2006, 11:13 AM

I will use an external Madrigal clock and swap CMD12 IND (SAA7345) with CD-PRO2M (SAA7324). However, the supply voltage of SAA7345 is 5.0 V and the supply voltage of SAA7324 is 3.3 V. Since the chip on CD-PRO2M runs on 3.3V do I need to mount a resitor in parallel between the wires? If so what should the resistanse be??

25th September 2006, 07:12 PM	#1
Elberoth diyAudio Member Join Date: Jan 2004 Location: Matrix	Clocking the CDM-Pro2 Anyone have had any expirience with doing that ? I'm torn between LC Audio X03, Telt Labs X03, AudioCom Clock 3 and Trichord Clock 4 (and their respective power supplies). Any ideas ?

27th September 2006, 10:28 PM	#7
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	It's been described here; http://www.diy-high-end.com/cd/page25.html __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

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25th September 2006, 11:50 PM	#2
loddie diyAudio Member Join Date: Apr 2006 Location: Colorado Springs, CO	Not to hijack the thread, but has anyone added wordclock input to the CDpro2?

26th September 2006, 02:03 PM	#3
apolon34 diyAudio Member Join Date: Jan 2004 Location: rouen	Hi, I made something like that using a x3 clock multiplier available in the market. I made a tweak on the cd-pro2 to make it run from a 33.8688Mhz clock and then feed my 11.2896Mhz DAC clock to the multiplier and then to the cd-pro2. it works perfectfully !

26th September 2006, 07:29 PM	#5
apolon34 diyAudio Member Join Date: Jan 2004 Location: rouen	Hi, The tweak is very simple, I just tied the SELPLL input pin of the SAA to ground. Originally, it has a pull-up resistor to VCC so you can leave it in place without problems and without the need to cut traces.

28th September 2006, 06:39 AM	#9
apolon34 diyAudio Member Join Date: Jan 2004 Location: rouen	I removed the original xtal completely. For that you need to unsolder the 4 pads of the original crystal. An improvement is that you don't need to remove the two caps near the crystal cause the 4 pads package makes a bridge between the caps and the SAA. for the ground, I juste scratched a bit the pcb to see the copper and then soldered the ground on it.

28th September 2006, 11:13 AM	#10
Lexluthor diyAudio Member Join Date: Sep 2006	I will use an external Madrigal clock and swap CMD12 IND (SAA7345) with CD-PRO2M (SAA7324). However, the supply voltage of SAA7345 is 5.0 V and the supply voltage of SAA7324 is 3.3 V. Since the chip on CD-PRO2M runs on 3.3V do I need to mount a resitor in parallel between the wires? If so what should the resistanse be??

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