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Modifing a CD player to receive external digital source
Modifing a CD player to receive external digital source
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Old 8th August 2019, 02:18 PM   #1
Sandm0n is offline Sandm0n
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Join Date: Nov 2014
Location: Europe
Default Modifing a CD player to receive external digital source

Hi,


I have a CD player based on a AD1865 DAC chip that I would like to modify so it will be able to accept external digital source (I2S) signal.
I can't find the CD player service manual anywhere online so all that mentioned below is only me guessing, I have only basic knowledge in this field.

My plan is to cut the traces and install a 2 way I2S switch so I can choose to play CD's or switch to the external source.
because the AD1865 chip cannot accept I2S signal there must be a shift register connected to it.

There is a YAMAHA YM3433B-D digital filter before the AD1865 and I can trace a DATA(SDI), LR clock(SDSY) and bit clock (BCI) that connected from the YM3433 to a YAMAHA YM7121C (controller???) and receive the DATA(SDI), LR clock(SDSY) and bit clock (BCI) signals from it.



I would like to know please if anyone knows where do I need to connect the 2 way I2S switch?
The I2S switch can switch DATA, LRCK, BCK and MCK.


Thanks

Last edited by Sandm0n; 8th August 2019 at 05:44 PM.
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Old 17th August 2019, 07:37 AM   #2
jdkid is offline jdkid
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Join Date: Aug 2019
Hello everyone!

I would also love to know if it is possible. It would be great if someone gave their opinion about it.

Thank you
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Old 17th August 2019, 09:47 AM   #3
rfbrw is offline rfbrw
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Join Date: Oct 2001
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How to get your beloved CD-player from the eighties into the Digital Domain
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Old 17th August 2019, 04:38 PM   #4
jdkid is offline jdkid
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Join Date: Aug 2019
Hi, it's a great job. I'm going to try to adapt it to my CDJ.

I'm going to ask for private to not create OFFTOPIC.
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