I've injured my snes

Hi everyone, I'm in the process of doing my first mod, it's a region lock and 50/60hz switch on my U.S snes. I live in England and most of my games are pal so I want to be able play them on this console.
Anyway I started off by de soldering and removing the rf modulator to make room for the switches. Plugged in snes to see that it was still working and it was. The next thing I did was to file a hole next the ref jack hole and fit my switches in place. I did not test the console after doing this because I didn't touch any electronics and assumed everything would be OK (how wrong I was).
I came back to the console the next day to carry on with mod but thought that I'd test that it was working before messing around with the chips legs. It was dead! The led did not come on although I don't think the led was coming on the last time the console was actually working.
The first thing I did was to test the fuse for continuity and it was in fact blown. I have desoldered and removed the fuse and have a new one on order.
While I had the multimeter out I tried to do a bit of investigating to see what caused the blown fuse, now to be honest I really don't know what I'm doing with a multimeter or with electronics in general, I'm a complete beginner.
The next thing that I did was to test the adapter. It is outputting 12v dc so as far as I'm aware that is ok?
Next port of call, the voltage regulator. Now this is where I wasn't sure if I was using the mm correctly. From reading up, I knew that I had to put one of the probes onto the legs of the voltage reg and one probe onto the pcb perimeter ground? I didn't know where the ground point that I should use was so after having a play around the only place I could get a reading was by placing the ground probe onto one of the pads where the fuse had been, the other pad didn't give a reading. All three legs of the voltage reg gave a reading of 12v.

Am I taking a reading from the voltage regulator correctly?

Could the led not coming the last time the console was working have any significance?

Ive read that I need to test the d1 diode but I don't know how to do this and couldn't get any reading from it.

Anyway I have ordered new fuses and a new voltage regulator but is there anything else I need to do/test?

Thanks for taking the time to read this guys and any help/advice would be greatly appreciated.

Cheers

 

Not sure about the problem you're having, just sounds like a blown fuse to me, simple fix, and a common fault with the SNES.

Since you're in the UK though, you should take a look at Bad_Ad84's switchless kit for the SNES. It's by far the best way to region mod a SNES.
http://assemblergames.com/l/threads/looking-for-4-testers-for-supercic-igr-1chip-mod.58855/

 

Hopefully it is just the fuse but it seems strange that I'm getting 12v from all three pins of the voltage reg? That's if I'm even taking the reading correctly?

 

i believe the input pin should measure 12v, but the output should be 5v (i may be wrong)

 

Neither side of the fuse is ground. So your readings are incorrect.

 

If you get 12v on the output of the 7805, that is BAD. If you get it on ground as well, then I don't know how you're even measuring

Edit: Just read that you took the ground on one of the fuse pads. Those should both carry the input voltage! You can find ground all around the SNES pcb, anything with large metal areas. (For example, take the cart port.)

 

Well that's strange then because when I use any of the metal area around the board, I don't get any voltage reading from the regulator at all, and I have literally tried using everywhere as ground. The only time I get a voltage reading is when using the fuse pad.

 

Well if you've removed the fuse, then obviously you're not going to get anything from the 7805. All voltage coming from the power supply has to go through the fuse before it reaches the 7805.

 

Ah ok, so that's why I couldn't get a reading. It makes sense now. I thought that it went through the voltage regulator before the fuse. Well I've ordered a new fuse off eBay so hopefully it's just that that needs replacing.

 

A fellow Charles Hamilton fan! All of the Magnet, Gem, etc, are available from:

http://friardale.co.uk/

 

Snes working again. Just the fuse that needed replacing.

Great site that Conker.

 

good stuff. good to hear the console was completely dead.