DIY SPDIF output on Marantz CD-46

sikkek · 17th September 2002, 02:14 PM

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 · 17th September 2002, 02:31 PM

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 · 17th September 2002, 02:44 PM

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 · 17th September 2002, 02:49 PM

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 · 9th October 2002, 01:39 PM

I gave it a try: works like a charm!

Art · 9th October 2002, 04:22 PM

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.

17th September 2002, 02:14 PM	#1
sikkek diyAudio Member Join Date: Sep 2002 Location: The Netherlands	DIY SPDIF output on Marantz CD-46 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

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17th September 2002, 02:31 PM	#2
fcserei diyAudio Member Join Date: Sep 2002 Location: US	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.

17th September 2002, 02:44 PM	#3
sikkek diyAudio Member Join Date: Sep 2002 Location: The Netherlands	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...

17th September 2002, 02:49 PM	#4
fcserei diyAudio Member Join Date: Sep 2002 Location: US	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.

9th October 2002, 01:39 PM	#5
sikkek diyAudio Member Join Date: Sep 2002 Location: The Netherlands	I gave it a try: works like a charm!

9th October 2002, 04:22 PM	#6
Art diyAudio Member Join Date: Oct 2002 Location: Thailand	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.