MC-303 no sound

[mma_rub]

Hi all. I have an old Roland mс-303. the digital part works in it, but the sound does not work, neither the main one, nor for the headphones.

I found a service manual, made tests according to the manual, everything is fine with the digital part, the midi works, the buttons are pressed, the ADC works, but the sound tests do not pass.



jackboard checked - it is normal and fully working, when the signal is connected to the input, there is sound in the headphones.



what can be seen to resolve the issue?

there is an idea that the DAC IC is faulty, and it is possible to actually buy and change it

[F61 Project]

You need to test if it is AF signal on DAC`s outs while pressing pads or playing patterns. And first of all do the reset in system settings.