Taito F3 jamma board (Grid Seeker) stuck trigger

[carlosemandrade]

hello all

bought this great game, video and audio works very well but trigger B (bomb) for both players don't work. in test mode, both indicates "ON" state even without any controller

could be a board problem ? 

[undamned]

I'm assuming you've tried other JAMMA boards on your setup and they work fine?
-ud

[carlosemandrade]

Yes, other jammas works fine.   Used a multimeter to check input and traces/bad solders on the F3 board. P1 and P2 "B" (bomb) triggers goes with the rest of controller commands to a proprietary Taito SMD ic. The pin of "B" trigger on smd ic behaves correctly  ( testing this specific pin, vcc with trigger open and 0v with trigger pressed BUT in game the trigger continues stuck  )

I'll return this board and catch another (probably Final Star Force).