Schema for benchmark DAC 1?

[Ryssen]

I have a DAC1 that I was going to sell,but the buyer found out the optocal input is not working,and no matter how the input selector is set theres sound from the coaxial input...So is there´s a schema?

 

[Bill Fuss]

Have you looked to see what receiver chip it uses? That should help to run down the fault.

 

[SoNic_real_one]

Usually it is some kind of multiplexer chip that switches the inputs (NAND gates usually for just a couple of inputs). Very seldom it is one single receiver chip with multiple inputs (but sure, it is possible).
So if you can, post a picture of the inside...

 

[Ryssen]

He should send it back to me,so I will open it and see,and take a pic to post...

 

[Ryssen]

I opened the case and found what the fault was..It was a jumper that was set to disable the input selector,I changed it and now it works as it should..
Thanks anyway...