I have been following this thread http://www.racketboy.com/forum/viewtopic.php?f=25&t=37716 for the past week or so, I tried out the mod and it worked great. Figured some people here would like this if they didn't already know about it.

Read through it all though because there was a couple of different ideas thrown about.

To put it simple, take pins 1 (red Pr output) and pin 24 (blue Pb output) from the S-ENC chip and pin 7 (green "actually Y or Luma") from your A/V out and ouput plug of your choice to the appropriate input on your TV. I used a 9 pin to RGB cable from an old video card I had.

This worked and the picture is so clear, however it worked with issues (image shakes) on my 720p plasma because of the fact the TV didn't like the 240p signal, but on my CRT it was smooth sailing. You can pick up inexpensive upscalers that will accept 240p then I'm sure it would be fine if you were to run into the issue I had on my plasma.

that's component video right, the r/g/b rca-style jacks? what are you using an rgb cable for?

anyway, that's super neat. how do you identify which version snes is compatible?

sesy

does it make a noticable difference on your crt?

I am using one of these cables and the plug I stole from an old video card.
http://icrontic.com/images/draco/articles/sapphire_radeon_x8... http://i00.i.aliimg.com/photo/v0/108355588/Mini_DIN_connecto...

I believe in the original article it has the specific pinouts for the several S-ENC chips used in the SNES console. Both my SNES and SFC had the same one.

if you dont want to mod your system internally and/or don't have the skills there is an SNES RBG SCART cable available. Run that to a SCART TO component adaptor and your good to go.

Yes the picture was clearer, I used S-video before.

On my plasma it looked as clear as using an emulator without any image processing. I'm still tempted to by an upscaler just because it looks so good, but it's $50 I could spend on more games and my plasma isn't my gaming TV.

I had my SFC apart again today, thought I would take some pics of the mod.


I removed the RF block and soldered the 9 pin socket right to the board.

I made a couple of screen shots, I wish I had a tripod because the pic on the plasma is not justified at all.

35 inch CRT

42 inch Plasma

I have my own pictures as well...




I didn't have any component jacks at the time...

32" CRT:

47" Plasma:

@ Guntz ^^^ How did you find the colours, when I first did mine that way the colours were no where near as strong as with using pin 7 from the A/V. I initially just adjusted them with the TV settings.

pin 23 is the green jack. pin 7 is something else- the combined composite video I think. I initially wired the green jack up to pin 7, but it was very washed out and grainy. I moved it to pin 23 and all is well. the picture is super sharp, but it's a little faded. i think the white level is just too high. I don't know enough about what i'm actually doing to remedy that though.

oh, and i just wanted to add the my mainboard is labeled -02 and the s-enc chip in my unit is a 9231 something, whatever that is, although it's apparently the same pinout as the 659x. the differnent encode might have something to do with the color levels I observed.

marvelus10 , im diggin the custom cord man
looks super nice

http://mikejmoffitt.com/BA6592F.pdf

This component mod was pretty thoroughly discussed over on Sega-16...

http://www.sega-16.com/forum/show...!

I think it's pretty funny how a Nintendo mod got more coverage on a Sega fansite.

@ Lincoln - I also tried using pin 23 from enc but the colours were very light, tried the pin 7 from A/V suggestion and got the colour levels up, I never noticed any difference in picture quality though, still nice and crisp.
@ Guntz - Over the past 5 years here on NA I have never really seen a big interest on NES/SNES mods other than region chips, but there seems to be a lot of interest modding other systems on other sites, especially when it comes to video output. Maybe they have finally ran out of ideas and turned to Nintendo from lack of things to mod.

Haha, you've got a point there. The Genesis may be versatile with mods, but there comes a time when most everything has been covered already.

Also, I notice you have an S-ENC B while I have a plain old S-ENC. Perhaps they are slightly different? You could try hooking up an amp to the offending signals on your encoder.

@ Guntz - That could be a possibility, however I am at a point where the colours and the clarity have exceeded that of when I was using S-video so I'm more than happy with the outcome.
My next mod is to do the digital audio out, so that I can install one of these http://www.thesource.ca/estore/pr... into my SFC and have an HDMI SFC. This product supports 240p, so it will work for my plasma TV.

this is so cool. no idea this stuff was ever an option. so are SNES units capable of digital audio out?

There is a little circuit you have to build and some very tedious soldering but it is doable.
http://gamesx.com/wiki/doku.php?id=av:snes_sp_dif

so using these as examples, you still have more work to truly find a 100% mod. it seems like the examples shown have fading issues correct?

I posted over at NESDev and got responce, since then the original poster of the YPbPr mod has taken notice of that responce and I'm just waiting to see what the outcome is. With that being said though he was using a different encoder chip as there is several different versions used in the SNES/SFC consoles over the years. Mine as you can see in my pictures is the S-ENC-B chip, the original poster had a different chip and the spec sheet for that chip has some indications for an amplified video signal, this could be the difference and reason as to why some people have faded and washed out colours or not.

I decided to do some circuit tracing and image work tonight while I'm waiting on RCA connectors to come in for my mod. I traced the traces which go out of the pins on the S-ENC, the Pb and Pr signals then run though a 271 Ohm resistor and capacitor. They then proceed to pass through a via and go back into the S-ENC into the Pb and Pr In pins which correlates for the BA6592F specifications sheet.

There's pads which can be soldered to on the underside of the board for those who want to avoid soldering to the SMT S-ENC chip itself. I also wonder if any signal quality improvement can be gained or if kyuusaku on nesdev would be more agreeable to obtaining the Pb and Pr signals after they pass through the resistor and capacitor. I believe the resistor and capacitor are acting as a RC low pass filter on the Pb and Pr output lines. 

When the Pb and Pr lines go back into the S-ENC they are processed together and amped up 6 dB before going out Pins 6 and 7 (Chroma out and Composite out respectively). I'm still tracing what happens with the lumenence but it goes through a via to the bottom and then through a resistor and capacitor in parallel and eventually to a transistor so it might turn out being an amplifier circuit. Sadly, I'm not as well versed in filter and amplifier circuits as some and undoubtedly kyuusaku is.  

http://i50.tinypic.com/15gw1g1.jpg
http://i46.tinypic.com/2mngqd3.png

Let us know how you go AaronE.

You shouldn't take the Pb and Pr straight from the S-ENC chip and feed it to your TV. It comes out of that chip at 3.3V which is far too high for a TV. It wouldn't be good in the long term. YPbPr should be under 0.5V. Simply use the Y signal from pin 7. It seems putting the Pb and Pr lines through a similar preamp to Ninty put the Y signal through, then putting it through a 6dB amp gets it close, however; there is too much red in the signal.

I have also seen a simply transistor mod, that the author claims to makes it perfect.