Don't you have other boards? My Continental Circuit has one knob for each (2) speakers, and use insert a Phillips head screwdriver to adjust them, they're like light / clear plastic. I believe those "knobs" were on the sound bound in particular, not the game's PCB. Made by Taito, though. Should be around!
Hi Otaku, I've looked for knobs but I didn't find no one. There's only one that looks like a knob but I dont very sure if is really a knob or something else.
About your question if a have other boards... the answer is nop
. It's my first one
PS: I made it enter the service mode and I put the game on free play. I found the customer manual for the game on internet, the links that I posted early is wrong
Thanks for your reply!!!