Turbo-Grafx 16 Picture Issues

[tbsjordan]

Got my first TG-16 in the mail today. I took a chance a bought one off ebay cheap(seller said he never tested it.) The system works, but I can't get a good picture. The system came with TV Sports Basketball, here's a couple pictures of how it looks.





To make sure it wasn't the game I went ahead and tried a copy of Military Madness that I had already.



The pictures actually adds more color to the pictures, its actually darker in person. I thought it could be the rf but I tried a NES rf and the picture just rolled. And if it makes any difference I'm using a Model 1 Genesis power supply because the system came with some panasonic adapter I didn't trust using.

Anyone have any suggestions?

[DragonmasterDan]

Got my first TG-16 in the mail today. I took a chance a bought one off ebay cheap(seller said he never tested it.) The system works, but I can't get a good picture. The system came with TV Sports Basketball, here's a couple pictures of how it looks.





To make sure it wasn't the game I went ahead and tried a copy of Military Madness that I had already.



The pictures actually adds more color to the pictures, its actually darker in person. I thought it could be the rf but I tried a NES rf and the picture just rolled. And if it makes any difference I'm using a Model 1 Genesis power supply because the system came with some panasonic adapter I didn't trust using.

Anyone have any suggestions?

Do you have a different RF switch to test with? if the NES RF wasn't working at all and this one didn't work properly it might be the TV as well. Try a different TV, the panasonic power and a different RF if possible.

[Necromancer]

Did you try jiggling the rf connector on the TG?  Its solder connections might need some help.

[alexsduo]

You can add RCA out, I am sure there is a schematic somewhere on this site.

I have a turbo grafx, that does not output any picture via RF, but when I plug it in the expansion dock, it works great... So I have to assume the RF is bad...

Good luck!

[thesteve]

i just fixed the rf on my third tg16.
it appeared to be a build defect (missing part) in the rf modulator.
it was working withe poor pic on one tv and not at all on another

[alexsduo]

Hmmm, thesteve, can you provide me some assistance?  Like what part was missing, did you just solder it, I want to get another TG up and running. Any pics would help... Thanks!

[thesteve]

i should have taken a pic.
if u look at the board on the rf modulator (jack on top three pins bottom) just below the jack is its solder joint.
there needs to be a small SM capacitor connecting it to the solder joint to its right

[tbsjordan]

I tried a bunch of other r/f and ac's and I still got the same result. I hooked up my NES to make sure the tv wasn't the problem and it had a clear picture. I don't have another tv to test it on. Guess either my tv hates it or I got burned

[BlueBMW]

You might try and rig one of these up.... ultimately you want to use composite over RF anyways...

http://www.cgquarterly.com/articles/tg16_cable.htm

[thesteve]

that cable works well

[bernielindell]

Nice site Blue!  Got some good reading there.

[alexsduo]

Great link, Im gonna try that for sure!

[thesteve]

composite is better
but for the sake of those who want it to work the way it was designed to (me included), we should pursue this.
i made one weak unit display strong through rf all ready, so it can be done I just need to get pics up.

[thesteve]

the one i got was missing the pass cap.
i replaced it with a chip cap from a cd rom board

[alexsduo]

Steve, you're the man.  I am not sure what to do, I will have to look at it..

I know I saw another schematic where you solder the wires in the inside, for more of a permanent solution... I will try to find it, as I know I will rip those cables while I am having a monster session of Keith Courage.