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Old 13th December 2012, 08:51 AM   #1
atupi is offline atupi  Romania
diyAudio Member
Join Date: Oct 2010
Location: Bucharest
Default Help with troubleshooting this DAC


i've finished building the DAC described here:Audio DAC | wakalixes:FX
Page is in german but google translate works quite well.
and this is the overview of the DAC:
Click the image to open in full size.

I have flashed the sotware and i receive massaes on display but no matter how i provide the signal (USB SPDIF or optical) the DAC shows all the time on display the message "No signal" (Kein signal).

Could someone more knowledgeable to help me to troubleshoot stage by stage why this is happening as i'm not so good in digital circuits to follow.
Of course i've wrote some emails to the guy who published the project but no aswer.

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Old 13th December 2012, 10:11 AM   #2
diyAudio Member
Join Date: Mar 2004
Location: Budapest, Hungary
It is sure the problem is around the CS8416
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Old 13th December 2012, 11:52 AM   #3
atupi is offline atupi  Romania
diyAudio Member
Join Date: Oct 2010
Location: Bucharest
I suspect the same. Attached the input stage.

When i press the SOURCE button i see that source is changing on display. Could be this possible even if let's say the communication between Atmega and CS8416 would be interrupted ?

I will check again the SPI connections between Atmega and CS8416

Any other clues?
Attached Files
File Type: pdf AudioDAC-digital-schematic.pdf (80.8 KB, 7 views)
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