Super Famicom video issue

Hello,
I am trying to restore my wife's Super Famicom. I started with a quick clean of it and got it working after getting a new AC adapter.
BUT the graphics are very red.
I searched but did not find anything related to this... only black & white or no screen issues.
Any ideas on where to start troubleshooting?

Some more info:
Japanese Super Famicom using AV cable
1992 SNS-CPU-GPM-01

 

Do you have the means to hook it up via RGB or S-Video? RGB would be better.
It could be a problem in the video encoder and RGB bypasses it.
At least all the colors are there!

 

hmm I'm using composite right now... I ordered a RGB cable (+scart to component since I have no SCART on my TVs). But it will take a long time for them to arrive.
I just saw this video and it seems almost "too simple" to mod it for component:
I have the S-ENC chip. Might be worth a try... any reasons I should not?

 

It's up to you if you want to try it. Best if you test your TV first. See if it accepts low res (240p) over Component with some other console.

 

I tried on two TVs: same result. I also plugged in my Mega Drive and it worked with composite so it's something in the Super Famicom.
I also found out that some extra stuff need to be done to that mod for it to function properly: https://forums.nesdev.com/viewtopic.php?f=12&t=8979
Thanks!

 

Hm, maybe you misunderstood.
I want you to hook up a different console to your TV via Component cables. This other console should be able to output a low res 240p signal. Probably a PS2 with a PSX game would be best for that, or a Wii with homebrew / an SNES emulator.
You should do this before you mod your SNES because many modern TV will not accept 240p over Component, making the SNES mod useless.

 

This may be a silly question, but have you tried a different video cable? I have definitely seen issues where a screen turned all one color due to a damaged VGA or Scart cable, granted I have never seen that with composite (unless the multi-port on the Famicom itself is damaged).

 

ah, I see! I'll have to check that. Thanks for the advice!

As a matter of fact I did not, because I don't have another cable for it. The seller did say he tested on his console before sending it, though. But I'll have to double check that. I just assumed it was the console because my wife's sister said it was not working before (I learned she used RF though, which might be damaged as well).

Thank you both. I don't plan on giving up on this one easily, even though, as you may have noticed, I am a n00b at this.

 

this part of the board seems not in a good shape. There were oxidation spots and in the legs of the AN1324S. I cleaned a bit and those two traces seem exposed and partially corroded.

 

Those caps don't look to be in the best shape either, have you tried testing them?

As for the traces I would verify you still have continuity.

 

Update:
Bought a decent mutimeter, and it turned out C65 and C73 were bad. But the only change I noticed after replacing them is that the sound is back to normal volume. Before, it was very low and I had to turn up the volume on the TV. Now it sounds on par with the Mega Drive.

Image stayed the same, though. I'll continue tomorrow.
(I was not yet able to get another cable to test)

 

Well, when 2 capacitors are bad, you should replace all of them.

 

hmm oh well, here I go shopping for caps again

 

meh, I changed all caps and still get the same issue. Any other things I should try?
I already tested cables, TVs, etc. I tested some traces that looked bad but they all worked. I am not sure what to do.

 

Sounds to me like the encoder chip is bad. Not much you can do in that situation other than buy another snes. Maybe you could also check to make sure all the pins on the encoder chip are still soldered to the board properly. Try reflowing the solder on each pin. Just touch each pin with your soldering iron for a few seconds. Make sure the iron has a tiny dab of solder on it to ensure proper heat transfer

 

Did not work as well. I guess it is time to try the RGB mod just to see if something changes. If not, I'll have to give up on this one.

 

very interested on your results I have a SNES lauch with seperate sound board also showing a red screen tint but all else works flawlessly and ive replaced the encoder chip twice to no avail

 

very interested on your results I have a SNES lauch with seperate sound board also showing a red screen tint but all else works flawlessly and ive replaced the encoder chip twice to no avail

 

The video encoder is custom?

The encoder is possibly a BA6592F and is a standard part and could be replaced if that is what is causing the problem. No need to junk the system.

mmz16x may not have had any luck fixing a similar symptom but maybe you might. Or maybe one of your PPUs has developed a failure inside it causing this red tint. My SNES that I've had since it was brand new just recently developed a failure inside one of the PPUs causing the next to last pixel in every sprite cell to be incorrect causing vertical lines. From all the observations and advice I've gathered it sounds like an internal failure which seems like that isn't all that uncommon with the SNES. It's really sad because I think the SNES is a great system but so far it's the only one I know of with these weird chip failures.

 

It's not limited to the SNES though. The first revision of the PSX sound chip (CXD2922) is also notorious for dying early.