Problem Ghouls n' Ghosts rolling screen on my Sony Trinitrons.

[daeds]

Hey there!
Now that I've fixed my Toki with all your help (thank you SO much!), I need to address this tiny issue with my GnG bootleg board,
Only happens on some TVs, mostly my Sony Trinitrons, this is the only game that the screen keeps rolling whenever I try to play it on these TVs, every other game works well and syncs well but this one, same cable (Megadrive 2 RGB cable, SCART), same supergun, same voltages,
Sound works and the colors are fine, but the screen keeps rolling and rolling and won't sync.
Any ideias what can I do? This Sony I have on my table is one of the best looking TVs I have and is plugged to every single console I have (and the jammas).
Thanks a lot!

 

[Ace`]

Bootlegs are a bit quirky when it comes to syncing on TVs, not sure if anyone still sells them but this would most likely fix your problem. If you can solder there's a pcb shared on oshpark and the circuit is pretty basic so not many parts to order.

Another option would be to see what the bootleggers changed in the sync circuit from an original board (schematics are online) and fix it that way.

 

[Jacmar]

Some bootlegs just wont sync with a supergun. I've a Wrestlefest, Toki and a Dragon Ninja that dont sync with the supergun but are fine in my cabinet

 

[daeds]

Bootlegs are a bit quirky when it comes to syncing on TVs, not sure if anyone still sells them but this would most likely fix your problem. If you can solder there's a pcb shared on oshpark and the circuit is pretty basic so not many parts to order.

Another option would be to see what the bootleggers changed in the sync circuit from an original board (schematics are online) and fix it that way.

I can solder indeed, it's the electronics that still get me. Going to check that pcb! thanks a lot! I have some bootlegs but really this is the only one that gives me this problem. Toki had something like that but the crystal osc was easy to fix, just soldered a 12mhz instead of a 11 that was there, but here it seems just to have 1 osc.

 

[daeds]

Some bootlegs just wont sync with a supergun. I've a Wrestlefest, Toki and a Dragon Ninja that dont sync with the supergun but are fine in my cabinet

Is your Toki like mine? I just changed the crystal to a 12mhz one and it worked awesomely.
Yeah, Superguns are finicky, I wish I could woodwork my way into a cab.

 

[Jacmar]

mine looks like this

 

[daeds]

mine looks like this
View attachment 44755

That's the one I was eyeing but then the seller lost it..
Mine has two boards but the daughter board is bigger and is beneath.