Naomi, a strange no-sound issue.

[crazyjojo]

My Naomi recently lost audio. Here's what I've checked so far:
No startup logo sound,no in-game sound, but both left and right channels work during the sound test in Test Mode.


Referring to the Dreamcast schematic,the 6119 is the audio chip, another one is the audio RAM (IC35).
RAM check:Good.
I replaced the two nearby capacitors:6.3V 100µF and 10V 220µF, though the new caps are slightly smaller than the originals.
After replacement,no change. Could it be that the audio chip itself is faulty?

 

[Ace`]

315-6119 is a very common failure, it usually results in IC35 showing as bad in ram test though.

 

[crazyjojo]

315-6119 is a very common failure, it usually results in IC35 showing as bad in ram test though.

but ram test shows ic35 is good.

 

[Orakelschaf]

Maybe this will help you: https://www.arcade-projects.com/thr...-right-audio-channel-of-a-sega-naomi-2.26254/

I had a non working right channel and for me it was a faulty DAC not the AMP itself