PAL Super NES with dim video: not working anymore after recap.

Hi there!

So, in order to test my repros I needed a PAL Super Nintendo. I bought it in France on eBay (described as working), and asked my familly to send it here with some other stuff.
After a looong wait (thanks customs for holding my packet for nothing) I finally got the console... to see it wasn't really working.

At boot, the video was really dark, and became darker and darker.
I could validate my repros were working, but I wanted to repair the console.

It's a SNSP-CPU-01
http://console5.com/wiki/SNES#SNSP-CPU-01
http://console5.com/wiki/File:SNSP-CPU-01-Cap-Map.png


From what I read, it just need a recap. Easy stuff. I open it and saw a leaking capacitor and some damages traces.
So I removed the rust, added some solder on damaged traces, remaded some really bad traces with kynar, and of course recap. One of the pad of the C61 went of when I tried to remove the capactor, but I managed to weld an electrolyte one on a via close to it.

And now... it doesn't show anything just power on.

So far I tried:
- Recap a seconde time -> nope
- Remove the caps, remove as possible the tin, and Recap + test one by one -> nope
- Reflow every chips next to replaced caps -> nope
- Clean multiple time -> nope

I know there's some life in it because my SD2SNES has its CIC led blinking when I took it from my US SNES and seems to boot up normaly after a reset.

No sound, No boot, no nothing.
From my multiple on/off test, I blew up the fuse, then replaced it.

I'm starting to think I damaged something but I can't figure what it is.

pics:











Any suggestions?

 

Hows the power supply on it?

 

It's a compatible adaptor.


Not the best but it's versatile and you can change/invert the plug. It perfect for testing.

I could put another plug and use a better one though.

 

So I've weld a classic plug (2.1mm id x 5.1mm) and tested with two other power supply. Nope. Same thing.

 

So, I've made a burn-in test cart: no boot.

So I've suppose there's a problem with the Ram, CPU or graph chip. All of them have been re-flowed and are getting 5V.

I've bought an other PAL snes with graphic issue, I'll try to make one unit working with those two.

 

What video cable were you using?

The video getting dimmer and dimmer sounds like using a cable with caps in on pal hardware.

 

Yeah I know.
I used a RGB SCART for PAL Gamecube for testing: I thought it was the same as the PAL Snes, which is not.

I think I've recaped the console for nothing, and damaged the console in the process (but I don't understand how et what I've broke).

Now it's plug in composite to my home cinema amplifier.

 

EU SNES PSU outputs 9/9.4 V AC with 1.3 A. Your adapter outputs DC, and from past experimentations, it is really not advised to use DC adapters.

GC RGB SCART cable isn't the same as for the SNES, and, looking at your pictures, I guess you killed your SNES by trying to repair it (IMG_143454851f9e001815 shows a short circuit neyt to the cap).
I never had to recap any of my SNES.

 

PAL SNES has a convert circuit AC -> DC inside before going to the 7805. Plug an DC adapter doesn't change anything. (it just converts DC to DC).

From the pic, if you referencing to the bridge next to pin 7 of the U10 chip, the trace was broken when the pad came off, so it's the same as before and it doesn't make shortcut.
The trace has as to be connected to the capacitor and then on pin 3 and 5 of the U10 chip. It doesn't make any contact with the via nor the pin 6.

And yes Pal GC doesn't use the same RGB SCART as PAL Snes, but I found it too late.

 

The pal Snes cable uses a resistor too doesn't it (or is that n64 or GC?)

 

The PAL SCART use resistor but no capacitor.



The PAL Gamecube use capacitor and ironicaly is closed to the NTSC SCART snes cable:

 

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