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Old 31st January 2012, 03:31 PM   #17911
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Hi Brent

How do I apply clock signal directly to the decoder
Appreciate explanation
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Old 31st January 2012, 03:45 PM   #17912
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Hello

If this is for transport only use then feed a 16.9 Mhz clock signal into CRIN. If you are using it has a full unit then you need to use a buffered 16.9 Mhz clock signal from the same clock that feeds the dac chip. Lift the dac side of C521 and apply the signal to the leg.

Brent
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Old 1st February 2012, 12:19 AM   #17913
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Quote:
Originally Posted by Fidelity Audio View Post
Hello

If this is for transport only use then feed a 16.9 Mhz clock signal into CRIN. If you are using it has a full unit then you need to use a buffered 16.9 Mhz clock signal from the same clock that feeds the dac chip. Lift the dac side of C521 and apply the signal to the leg.

Brent
The clock signal is presently supplied to pin 28 of the DAC. The transport works. But when I transferred the clock signal to pin 13 CRIN of the decoder and ground pin 14 CROUT the transport will not work
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Old 2nd February 2012, 10:04 PM   #17914
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Anyone got any info my cd52se was playing fine audio went distorted and in service mode now displays 07 p122 any help anyone.


cheers alan

it now wont play but spins up and tries to focus
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Last edited by bikeral10; 2nd February 2012 at 10:10 PM. Reason: more info
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Old 2nd February 2012, 11:04 PM   #17915
hotiron is offline hotiron  Scotland
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Errrrm! 07 p122 is a subcode error.

Compact Disc subcode - Wikipedia, the free encyclopedia

Were you modding prior to your dilemma Alan?
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Old 3rd February 2012, 06:54 AM   #17916
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Quote:
Originally Posted by hotiron View Post
Errrrm! 07 p122 is a subcode error.

Compact Disc subcode - Wikipedia, the free encyclopedia

Were you modding prior to your dilemma Alan?
No only mods are opamps it stands for long peirods tho its not my main player.
just pulled it out to have a listen.

cheers alan
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Old 5th February 2012, 02:33 PM   #17917
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Quote:
Originally Posted by Fidelity Audio View Post
Hello

If this is for transport only use then feed a 16.9 Mhz clock signal into CRIN. If you are using it has a full unit then you need to use a buffered 16.9 Mhz clock signal from the same clock that feeds the dac chip. Lift the dac side of C521 and apply the signal to the leg.

Brent
C521 is a 10 pf cap. Lifted one leg and fed the clock signal
It works
Pre 5V regulator caps replaced with 22000uf and 4700uf
Supply regulated with 7809 and 7909
+8.88V and -9.24V measured
Is the difference in voltage critical?
Thanks Brent
Thanks Brent

Last edited by Audiohifi; 5th February 2012 at 02:44 PM.
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Old 6th February 2012, 09:09 AM   #17918
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Try fitting a 470uF cap after the 7809 and see if that voltage increases. I run mine on +/-12V. Also check the supply voltage to the 7809. It will work but it would be better if it was closer to the 9V.

Now it works change the 10pF cap for a Silver Mica and solder it closer to the decoder for further improvements

Brent
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Old 10th February 2012, 11:43 AM   #17919
UV101 is offline UV101  England
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what are the voltages pre reg?

I've previously run mine on +/-8v regs when they are running off the original supply as I think the rails may not have enough headroom for 9v. Depends on the reg drop out. Looking at the OnSemi 7809 datasheet, you need 2v drop out.

In the main player, i've got a separate TX & PSU and so use 3 pairs of 12v SPowers the same as Brent.
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Old 10th February 2012, 11:52 AM   #17920
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I use a 12V TX which equates to 16.8V pre reg leaving enough V headroom for the SPower.

Brent
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