Easy SNES/SFC YUV component video!

[Lastcallhall]

It's not exactly a line. What GohanX speaks of is a darker-than-the-rest-of-the-screen vertical band in the middle of the screen. I notice it a lot in Star Fox and with RF video.

I'll have to look. FWIW, BTW, the SNES outputs a gorgeous s-video signal on my RPTV. I'm debating trying to find a older console (probably a yellowing one since it was the earlier models that had that issue - my SNES is a pristine shade of off white), or if I should bite the bullet and build my RGB to composite encoder for all my systems.

[Guntz]

I'll have to look. FWIW, BTW, the SNES outputs a gorgeous s-video signal on my RPTV. I'm debating trying to find a older console (probably a yellowing one since it was the earlier models that had that issue - my SNES is a pristine shade of off white), or if I should bite the bullet and build my RGB to composite encoder for all my systems.

For the record, that page describing the component mod is incorrect on motherboard age. My suspicion was correct, the SNES revision with that S-ENC encoder is a later revision which consolidates the mainboard considerably. That SPDIF guide you linked even points that out.

My compatible SNES was never disassembled, all the screws had that virgin snap. The top half is yellowed while the underside isn't. There isn't an FCC ID sticker either, it's just molded plastic. Hope that helps narrow down the possible suspects.

[Lastcallhall]

What's your S/N on there? Maybe I can narrow down the range that way.

[Guntz]

Serial:

UN21195235

[Lastcallhall]

Awesome thanks.

[Bibin]

For the record, that page describing the component mod is incorrect on motherboard age. My suspicion was correct, the SNES revision with that S-ENC encoder is a later revision which consolidates the mainboard considerably. That SPDIF guide you linked even points that out.

My compatible SNES was never disassembled, all the screws had that virgin snap. The top half is yellowed while the underside isn't. There isn't an FCC ID sticker either, it's just molded plastic. Hope that helps narrow down the possible suspects.

Funny. I should mention that my compatible SNES was yellowed on the bottom, but the top was fine.

I swapped shells with my later-revision one, which was entirely non-yellowed.

I think it's a safe bet that one with a yellowy shell is likely to be compatible.

[Televator]

What?! Too good to be true! I've got like 5 SNESs in the closet. If none of them are the right model, so help me, I will rage.

[Guntz]

Funny. I should mention that my compatible SNES was yellowed on the bottom, but the top was fine.

I swapped shells with my later-revision one, which was entirely non-yellowed.

I think it's a safe bet that one with a yellowy shell is likely to be compatible.

Did your compatible SNES have "virgin" security screws? They sometimes require quite a bit of force to snap out of their screw posts.

[GohanX]

On SNES's I always use one of those T shaped screwdrivers with the Gamebit, it allows a good amount of force to be applied to the screw without risking stripping the head of the screw.

I still haven't gotten around to checking my spare SNES to see if it's compatible for this mod. Taking care of a baby takes a lot of your time!

[Guntz]

A safer method than a cordless drill, is to just use a pair of pliers with the hex-ended security bit to get the screw out of that "glued in place" phase. Be sure to push down on the security bit so it doesn't lift up and slip. I also recommend screwing/unscrewing each of the SNES's case screws so they aren't so ridiculously tight.

[GohanX]

Hah, I just decided to open up my parts SNES's, one of which was a virgin with a bad cart slot, and I couldn't find my T screwdriver. What a pain in the ass.

Unfortunately, none of my parts systems have the correct video chip, and I'm not touching my Super Famicom since it is still in like new condition.

At least I fixed the cart slot on the new SNES

[Lastcallhall]

Just picked up a CIB SNES for a little more than I wanted to pay for it but it had a S/N of UN234633920 so hopefully I'll get lucky.

[Ace]

Guys, I need help with this. I got Component video working on my launch-model Super NES (it uses an actual BA6592F rather than the S-ENC encoder), but the video looks horrible! No matter what I do, the best I get is very dark video with almost non-existent color. What the hell? I don't get it. If I hook up everything straight to my TV, the picture is bright and the colors are almost non-existent, but when I put a 75ohm resistor on Luminance and 470ohm resistors on B-Y and R-Y, I get a dark picture with very dull colors. I get the same result on two different TVs.

EDIT: Oh wow, what a bunch of shit! I pulled out my spare Super NES and found the SNS-CPU-GPM-01 motherboard with the S-ENC encoder rather the actual BA6592F, and it worked first try. I needed a 75ohm resistor on Luminance because the picture was way too bright, but hell, it works. I don't get it: it works on the S-ENC, but it doesn't work correctly on the actual BA6592F. Maybe an amp is required on the actual BA6592F? I'm gonna look for some transistors and a new 7805 as I accidentally blew the regulator on my SHVC-CPU-01 Super NES (this one has the BA6592F encoder). One thing's for sure: the SHVC-CPU-01 Super NES requires an amp on Luminance, otherwise the video is EXTREMELY dark. It's possible R-Y and B-Y need an amp as well.

EDIT 2: I was right. You need an amp for the real BA6592F. With no amp on the B-Y and R-Y outputs, you won't get any color. You also shouldn't take Luminance straight from the encoder, but rather pin 7 of the multi-A/V out as it too needs an amp which is already present on the motherboard.

[Lastcallhall]

So I got my SNES in yesterday and it's the right model - I'll wire it up tomorrow if I have time and see how it compares to s-video. I'm still waiting on a part to add an optical audio out, but once I get that in, I'll be testing that baby out like there's no tomorrow.
*excited*

[Guntz]

So does this mean older SNES revisions are Component-compatible too? An amp circuit isn't the worst thing in the world...

I haven't bothered to do another Mouser order, so I still don't have component RCA jacks... Eventually I'll get around to it, not that anyone cares. I wouldn't mind trying out that optical audio circuit either, I eventually figured out what that table of connections means... I think. You wire a bunch of IC pins to ground or voltage right? I'd just use a black RCA jack for that, it seems standard fibre optic ports in panel-mount are non-existent...