Snes - Audio Problem

[demianariel]

Hello everybody.

So, i decided to restore and repair a snes that I have gathering dust in a closet for 10 years.

10 Years ago my snes stopped working (the light won´t turn on when powered on).

Today, i decided to fix it!
After a little research i´ve realized that the pico fuse was blown up, so change it for a normal glass fuse of 1.5A.

The console now turns on without any problems!

Next stop: test a game! I insert Super Mario World, turn the console on and....nothing, black screen - no sound.

So this is what I did,

i opened the console again and cleaned everything with isopropyl Alcohol, cleaned the pin connectors (rusted), everything.

Now, i insert the game, and it works almost perfectly, the game has audio problems, i hear a constant buzzing sound.
When the game starts you can hear the buzzing and the music from the game but after a few seconds the music fades away and all i can hear is the buzzing.
I´ve tried DKC 1, same problem. No sound - just constant loud buzzing.

- i´ve cleaned both cartidriges.
- I´m using the a/v cable from the Gamecube (i´ve tried on the gamecube and the cable works fine), so i can discard that.
- The Snes model is the one that has the audio chip soldered to the motherboard.
- I´m using a generic ac adapter - can this be the problem?

i´ve read that a generic ac adapter can cause glitches /lines on the video, but it can affect the audio too? This is my best shot.

What do you think?

i´ve uploaded a video to youtube so you can see the problem

http://www.youtube.com/watch?v=SA5bRD4Tod0

Thank you for reading and i´m very sorry for my english.

[Gameguy]

- I´m using a generic ac adapter - can this be the problem?

i´ve read that a generic ac adapter can cause glitches /lines on the video, but it can affect the audio too? This is my best shot.

Yes, that could be the problem. I had a Genesis that buzzed when using a replacement adapter, I tracked down a proper original adapter and it played fine. The system came with the replacement adapter when I bought it used.

[demianariel]

Ok, i`ve got an update.
Today I bought a working SNES Mini witch came with the official AC Adapter.

i`ve connect the official ac adapter in my old SNES and now the constant buzzing noise is gone but still i don´t have any audio.
So, i'm thinking that maybe the problem are the capacitors.
But which ones? i don't see any capacitor in bad state nor Sulphated.

Any ideas?

Thank you for your time!

[Tokimemofan]

Ok, i`ve got an update.
Today I bought a working SNES Mini witch came with the official AC Adapter.

i`ve connect the official ac adapter in my old SNES and now the constant buzzing noise is gone but still i don´t have any audio.
So, i'm thinking that maybe the problem are the capacitors.
But which ones? i don't see any capacitor in bad state nor Sulphated.

Any ideas?

Thank you for your time!

If your unit is an early one you may have a bad SHVC Sound unit.

[raylydiard]

I am finding a lot of the faults are caused by them electrolytic capacitors being 10 years or over all need replacing.


All repairs i do i replace them in all consoles from 70s and up to the 90s consoles due to there being old now.
and some


If not all snes consoles i have had replace them when i inspect them boards if you see green crap on the legs replace them asap or the board will rust and all the traces will be gone for ever.

[demianariel]

I am finding a lot of the faults are caused by them electrolytic capacitors being 10 years or over all need replacing.


All repairs i do i replace them in all consoles from 70s and up to the 90s consoles due to there being old now.
and some


If not all snes consoles i have had replace them when i inspect them boards if you see green crap on the legs replace them asap or the board will rust and all the traces will be gone for ever.

Ok, i´ll give it a shot even knowing that is going to be extremely difficult.

this will work?

http://console5.com/store/kits/game-...vc-models.html