Hi,
I've got a Technics SL-PD688 CD Changer and I would like to extract a digital audio signal from it to feed into a external DAC. The DAC has a digital coax input.
Has anyone done this with a CD player that does not come with a digital out option? Do I just need to find the input to the internal DAC and tap a signal off from there or is it more difficult than that?
John.
If you are asking this, I do not think you are up to it. What you need is the service manual and schematic. From those, you can determine what signal format is used as input to the OSF/DAC chip(s). There's only a small possibility that it is in S/PDIF format, so you will then have to convert it and buffer it for output. If you are extremely lucky, all you need is a buffer and/or transformer.
Frankly, I do not think the effort is warranted for this one.
Kal
Easy, and if you've never done anything like this - well why not have a go! Just watch the power electrics and avoid gazing at the laser...
Google will find you loads of links of people who have done just this ...
-- With a Car radio head unit
-- With a portable CD player
- With a NAD HiFI player
Open the unit up, identify the main chips and look on the net for datasheets for these. Unlike schematic diagrams, a lot of datasheets are available for free download - and will show the first clue that a SP/DIF interface may be possible.
-- Adrian C
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