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peppennino 26th February 2021 08:25 AM

Salvaged CD-6 DAC board
 
Hi all,
I salvaged from a Cambridge CD-6 (brocken transport) a dual TDA1305 balanced DAC board.
Since I cannot find any hi-res image of the schematic, could you help me to find where to connect the input signal? Dac pcb has on-board psu and is very similar to the Dacmagic one.
Here's the only service manual I found:
Cambridge Audio CD6 Compact Disc Player Manual | HiFi Engine

The idea is to connect a Broskie's unbalancer before the opamps...

Cheers,
Vincenzo

rfbrw 26th February 2021 11:16 AM

What sort of input signal? SPDIF? SDATA,LRCK,BCK?

peppennino 26th February 2021 11:18 AM

Spdif or i2s

peppennino 26th February 2021 11:33 AM

1 Attachment(s)
This is the board

rfbrw 28th February 2021 01:18 AM

The CXD1167Q makes things a little tricky. If you want to use the board as is by connecting to CN2 you have to mimic the output of the CXD1167Q and sync the input source to the Cambridge board. The Cambridge board will supply MCLK at 256Fs or 384Fs but BCLK has to be 48Fs and data 16bit LSB justified. That will require glue logic.

peppennino 28th February 2021 06:40 AM

Thanks for reply. Not necessarily as is, I can change everything, as it comes free from a dismantled cdp..

rfbrw 1st March 2021 08:10 AM

The TDA1305 is naturally single ended. If you want something for the unbalancer to unbalance you have to leave it as is.


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