SFC power issue & s-video output

I just got a Super Famicom NTSC-J no mods, I wired up a 9v DC 1amp power adaptor (centre neg) and connected to a 3in1 svideo/Av cable(N64,XBOX,PS2) was working fine connect via svideo for about 10mins (bight sharp colourful picture) then while testing SFII The colour on the plasma went all washed out like it's missing a colour. I tried connecting via composite and same thing! Tried another lCD tv same thing.
I also tested on my PAL snes and it's perfect via composite but svideo is washed out (PAL has always been like this)

Any ideas or have I damaged something from using the 9v DC 1amp adaptor? What is the sfc standard voltage and amps?

 

its 9v 850mah (approx, this is from memory)

Using a PSU with more amps is perfectly fine.

 

Picture looked so good before but now looks really bad (washed out) would using a different power adaptor or av cable help? So running at 1amp would not have blow anything

 

You need to match voltage (more will probably kill it), but as long as amperage meets what the device needs, anything over is acceptable.

Maybe the cable is wired differently PAL vs NTSC/J? I know US NTSC cables for RGB have caps in them that need removing for use on PAL systems as an example.

Without actually ever owning a SFC, I couldn't be certain and wouldn't like to give you an incorrect answer.

edit:
Also, is the power supply regulated or unregulated? as unregulated could cause a little more voltage to go through it. But I don't think that is the problem as there is a regulator in side the SNES that should sort that out.

My guess would be a cabling difference required for the 2 consoles.

 

Awesome thanks will try a different cable in street fighter 2 the shadows under the characters are red looks so weird

 

The PSU I use for my SNES and SFC is 10 Volts DC 850ma. Actually the bottom of the console should have the same information on it.

This Video cable you have, I hope you only had the SNES connected to the TV right? Don't connect multiple consoles together with that 3 in 1 and then connect them to the TV. You could damage them. Also, did you try another video cable? It's possible the cable is just poor quality and something is wrong with it.

 

My snes is 9v 1.3a (I am now at home)

 

Or maybe its interference, try to connect the snes directly into the wall.

 

The SFC is rated for 9V/10V at 850ma (as it was designed to take the old FC PSU which they assumed quite correctly that most people would have already), the PSU probably is not the issue as there is a fuse and a power regulator inside the machine so even if the voltage increased the regulator should take the voltage or burn out and if the amperage went too high the fuse would blow, unless of course someone open it up and bypassed it and you are sure it is a DC PSU rather then an AC one?

I would try using a different cable, the all in one cables are in a polite word, shit. A different cable might solve the issue.

 

I dismantled the 3in1 cable and took out the ps2, xbox cables it's now just wired for left, right audio, composite, Svideo and ground (no didn't connect any other console at same time lol) there is no resistors or capacitors in the cable so that may be the problem?

http://img849.imageshack.us/i/imageejp.jpg/

http://img269.imageshack.us/i/imagedjj.jpg/

Picture looks very green and looks worse then the pictures show

Is it possible my plasma has damaged sfc av as the front svideo plug is no longer working(screen rolling) but back one gives same washout green picture

 

Don't you have RGB in Australia? Use that - way better. Is your TV able to do NTSC 60Hz over s-video?

 

No here in AUS LCD/Plasma we only have component, hdmi, etc no RGB (scart) connection. they deffinently support NTSC60 & PAL60

Is there any resistors/capacitors i need for the svideo cable? With my Pal snes If put a 75ohm resistor between ground and the Luma line the picture looks colorful and sharp. The weird thing is it was perfect for 10mins with the same svideo cord no resistors and then just dropped out to the greenish picture!