DIY SPDIF output on Marantz CD-46

[sikkek]

Hi all,

Has anyone out there made a SPDIF output on a CD-46? Inside is the saa7543 wich has an EBU output on pin 2. I asume this is TTL level. Can I simply hook up the regular conversion (driver chip, transformer, impedance adjustment, RCA connector) to this line?

Hope someone can help me out.

Regards,
Sikke Kooistra

 

[fcserei]

The spdif out is software activated in the decoder chip, and usually not active when the digital output is not implement . Enabling the output needs firmware rewrite.

 

[sikkek]

According to the datasheet, pin 2 can be active or LOW. The average voltage on this pin is 2.5 volts. This doesn't seem to be low. Furthermore, the default state of this pin is active...

 

[fcserei]

You can try. I've tried it with a Magnavox PCDP (same chipset) ant it was disabled.
Just give it a try, maybe it is enabled in the CD-46.

 

[sikkek]

I gave it a try: works like a charm!

 

[Art]

It was enabled already. I used CD-46 as transport for my non-OS DAC. I just connect pin 2 (it's SAA7345) to my handwound pulse trans 1:1 through 75R in series and feed the signal from secondary to DAC via 75R coaxial.

However, I live in Thailand and didn't sure that my CD-46 is different to your or not. Hope it's the same. Good luck.