I am working on a project Future Spa and have a question with regards to the driver board J3 connector (right most one on the top). According to the manual there should be no wire in the top most pin (pin 1) yet there is one on this game. Now the wire was soldered (badly) to the pin in the connector, but it looks original to the harness. The wire is white with a brown(?) band
The game came with 2 driver boards - no idea which one is original to the game (or if either), but one has a jumper wire going from this pin 1 to the -ve lead of C23 (which goes to ground via the regulator board according to the schematic).
Problem I am having is that with all connectors disconnected from the driver board (except J3) and all other boards (except the regulator board), something is loading down the 5volt regulator on the driver board (measuring only 3.8vdc and 1.5 vac) - so there is something in the connector or something else in the game shorting out. The regulator on the driver board works fine when bench tested (feeding 12vdc in - no other connections). But right now I am focusing on the connector (need to replace it as it is brittle and broken) - just wondering about this "extra" wire if it should be there, maybe some kind of factory mod?