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Old 8th December 2006, 11:58 AM   #1
@lf is offline @lf  Bosnia and Herzegovina
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Default Help me mod Philips CD960

Hi,

Here is shematics for analog out:
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Old 8th December 2006, 12:06 PM   #2
@lf is offline @lf  Bosnia and Herzegovina
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Here is shematics for modded analog out I found on the internet:
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Old 8th December 2006, 12:09 PM   #3
@lf is offline @lf  Bosnia and Herzegovina
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Here is another shematics for analog out:
I need opinion/explanation of this mods before I start desoldering.
Does anyone have any other suggestions for modding analog out?

I will post power supply shematics also.
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Old 8th December 2006, 12:26 PM   #4
poynton is offline poynton  United Kingdom
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Hi

Neither will work !

Andy
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Old 8th December 2006, 08:53 PM   #5
@lf is offline @lf  Bosnia and Herzegovina
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Quote:
Hi

Neither will work !

Andy
There is mistake in first shematic. Here is correct one.

Any other who can comment these mods or have suggestion for different approach?

What about 14 220n caps on TDA1541A?
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Old 8th December 2006, 09:15 PM   #6
@lf is offline @lf  Bosnia and Herzegovina
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I removed 100uF cap and CDP has much more detail and better bass now.
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Old 9th December 2006, 02:55 PM   #7
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You could try to remove the 2,2n slew rate limitation cap.
And the 22n cap on the output.

The first resistor with red X is for DAC current offset compensation, removing it will cause DC offset on output if 100F is removed.
The middle part is the analog filter, gives lot of HF when removed because of 4x oversampling.

Try change the 14 decoupling caps for higher quality/value,
1k78 I/V resistor for better quality,
better op amps + better decoupling caps.

Upgrade to S1 chip + SAA7220B perhaps.
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Old 10th December 2006, 02:26 PM   #8
@lf is offline @lf  Bosnia and Herzegovina
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Quote:
You could try to remove the 2,2n slew rate limitation cap.
And the 22n cap on the output.
Which one? (see red circles in shematic)

Quote:
Try change the 14 decoupling caps for higher quality/value,
Higher value is =

I have at hand only 100n WIMA MKP


[/QUOTE]
1k78 I/V resistor for better quality,
better op amps + better decoupling caps.

Do you have any reccomendation (KIWAME, VISHAY)?

I have AD825 OP AMPS. Any other/better choice you can reccomend?

Quote:
Upgrade to S1 chip + SAA7220B perhaps.
cap.
I have SAA7220B, S1 and S2 chip. I replaced TDA1541A with S1 (for S2 I'm not sure is it original or not) and player has more detail and better sound now.

THANK YOU for your replay
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Old 10th December 2006, 02:31 PM   #9
@lf is offline @lf  Bosnia and Herzegovina
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correct one
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Old 10th December 2006, 02:35 PM   #10
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Quote:
Originally posted by @lf
[B]
Which one?
The 2,2n below the I/V resistor.

Quote:
Originally posted by @lf
[B]
Do you have any reccomendation (KIWAME, VISHAY)?
Maybe just make sure they are not magnetic.
Or Vishay ?
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