Clock in a SONY CDP-XA20ES - diyAudio
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Old 20th January 2003, 03:32 PM   #1
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Default Clock in a SONY CDP-XA20ES

HI there

I have a sony CDP-XA20ES that have had an LC audio clok upgrade. The clock module has now been removed and i need to restore the original clock or make a diy clock upgrade. In the original clock there is a 45,158 HNz crystal and a pair of small capacitors. C1 and C2 Does anny of you know what the value of the capacitors should be? I vould also like to make a DIY clock upgrade - have anny of you seen stuff like that on the web?

Anny help is velcome.
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Old 20th January 2003, 03:37 PM   #2
hifi is offline hifi  Sweden
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maybe,

R1 = 1Meg
C1/C2 18-30pF

would work

/micke
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Old 20th January 2003, 05:03 PM   #3
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Lightbulb Cap and Resistor value

Hu Webercarbmann,
In my Sony the resistor is 10k and the caps 10pF. In the CDP-XA30 these values are:....the same.
But if you do want to install the DIY KWAK-CLOCK upgrade you have to remove the resistor and the caps.
Beginnning February I will get fundamental mode 45.1584 MHz crystals that (hopefully) will work in my clock. See also:
optimising kwak clock

And/or
The top secret public KWAK-CLOCK
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Old 20th January 2003, 05:13 PM   #4
Chris is offline Chris  Norway
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webercarbmann

Some info about making your own clock you can find here:
http://home.tiscali.nl/~t708955/cunos.htm
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Old 20th January 2003, 06:06 PM   #5
ergo is offline ergo  Estonia
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If you choose to restore the old clock then for sure use 1Meg resistor as hifi suggests... It improves the sound.

It is totally strange why Sony uses so small resistors in this place. It actually makes a clock a lot worse (more jittery).

I have CDP-XB930 and there the original value is 3.3k !!!!!

Ergo

PS. If anyone has any theory why they do this I would be very interested
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Old 21st January 2003, 11:43 AM   #6
alfsch is offline alfsch  Germany
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Hi ergo,
i did some work on a new clock for my sa-cd; the crystal is a 3. overtone, so if you load it not (or 1meg), it resonates at 15 Mhz, with a 3k load (or so) it resonates at 3. harm, 45.1mhz, thats why they do it this way...cheaper than complex l-c circuits;
i work on a colpitts 3.overtone clock at the moment if you are interested let me know.

alf
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Old 21st January 2003, 05:57 PM   #7
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Default Clock

HI all of you

Thanks for the input, to all of you. I think i would like to by one of the precisson 45.1584 MHz crystals from KWAK. I have some 5V voltage reference devices at hand. Would it not be posible just to connect one like that directly to the crystal? This would be verry simple to make. What is the price for just the crystal, Elso?

Thanks Peter DK
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Old 21st January 2003, 07:14 PM   #8
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Lightbulb 45.1584 MHz Fundamental Mode Crystal

Hi Webercarbmann,
Unfortunately the email button below your post is disabled.
Please contact me about the above mentioned crystal.
Sorry, I might understand you wrong but a crystal and a reference don't make a clock. You need at least a oscillator circuit.
You can reach me by email by hitting the email button at the bottem of this post.
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Old 22nd January 2003, 11:53 PM   #9
alfsch is offline alfsch  Germany
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Hi elso,
sorry for naming you ergo...
alf
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Old 23rd January 2003, 05:25 AM   #10
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Question Overtone Oscillator

Quote:
Originally posted by alfsch
Hi elso,
sorry for naming you ergo...
alf
Hi alfsch,
I am interested in yourcircuit. Could not email you, same problem as with webercarbmann (disabled email button). Please email me.
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