wonderboy 3 bootleg help

[makedome]

hello,
I'm repairing this bootleg wonder boy 3 which has a sync issue (image is slowly rolling vertically and also slightly shifted to the right with a portion that returns to the left) and missing audio.
For those who are going to suggest to trim the monitor I already did and that's the best result I can achieve. I replaced the flat cables joining the 2 pcbs because of some false contacts. Any hint on what is the section related to sync? I traced the sync pin from the jamma connector up to a 74ls08 and checked it: looked broken but the pin exiting from an and port is not connected to anything. Tried to follow the traces back but yet no result. Also if you recognize some schematics of another game that could be similar, please point me out. Thanks

 

[Alexforg83]

Hi I have the same PCB as you. Were you able to fix it?
My PCB is also displayed shifted and I also have a problem with the gal16v8 located in U3 on the rear board.
Are you able to make me a copy of the GAL? Thanks anyway.

 

[Mrhide]

make me a copy of the GAL

https://wiki.pldarchive.co.uk/index.php?title=Wonder_Boy_3_(bootleg)

 

[Alexforg83]

Thanks, I know PLD archive well but this is a different bootleg than that. I don't think they are the same GAL

 

[Asure]

Did you guys try to connect video GND already at the jamma edge?

 

[makedome]

hello, I gave up to repair it but meanwhile I found that it could depend on the level of sync signal. I found I put a 10k resistor on the sync wire I forgot to stabilize the rgb converter signal. Now I put a potenziometer and i regulate according to each board. I should take it back and check again