Snes sound problem

The place for all discussion on gaming hardware
Post Reply
mvsfan
Posts: 1209
Joined: Sat Oct 06, 2012 12:24 am

Snes sound problem

Post by mvsfan »

I have an snes Gpm-02 that has a very quiet left sound channel.

It also had poor quality sound so i replaced all the caps in it and it sounds much better now, But it still only has 1 sound channel working right.

any ideas what would cause this?


Edit: Nevermind. I scraped the multiout pins good, and the sound channel started working again.

Edit: No, it didnt. I still have the problem. I had plugged in the right channel then walked away from it for a while and forgot i did that.
I still need to know what else would cause this.

does anyone know where theres schematics for Non-Shvc snes' ? the only ones ive seen out there are for the shvc.

Id like to know where the sound channels should connect to from the multiout pins to what.
mvsfan
Posts: 1209
Joined: Sat Oct 06, 2012 12:24 am

Re: Snes sound problem

Post by mvsfan »

Bad Dac - U17. Problem solved.
User avatar
CkRtech
Posts: 668
Joined: Mon Aug 27, 2012 9:30 pm
Location: Seattle, WA

Re: Snes sound problem

Post by CkRtech »

Hey just following up with you on this - did you straight up replace the bad dac to find that it was the problem or did you diagnose it some other way?
mvsfan
Posts: 1209
Joined: Sat Oct 06, 2012 12:24 am

Re: Snes sound problem

Post by mvsfan »

Yeah, With a small amplified speaker and a test probe, You can "listen" to the analog parts of the circuit, right at the outputs on the chip.

In my case, the left output on the dac had no sound coming out of it.
Post Reply