Monaco GP gas pedal always on

[Yoeddy]

Hey guys, picked up a GP board set and I was curious if any of you guys have experienced the following...

Gas pedal always at full acceleration. Even if the gas pedal assy and optos are disconnected, the car runs at full acceleration. So in other words, you drop a quarter in, the car just goes. Plays normal otherwise.

Any idea which TTLs would control that? I do have it isolated to the board that sits between the sound board and the outer game board.

Thanks!
Jason

 

[Yoeddy]

Found the IC causing the gas pedal problem! IC6 on the game board between the sound board and the outer game board. Put in a socket and a new 74LS14N. Game works 100% now!

Thanks,
Jason

 

[vintagegamer]

Congrats! I had picked up one of those games years ago, and it powered up but I couldn't get it to credit! It had an odd credit circuit. Glad yours works!!

Can you add this to jacklick's 'what fixed your game today' thread?

 

[Yoeddy]

Congrats! I had picked up one of those games years ago, and it powered up but I couldn't get it to credit! It had an odd credit circuit. Glad yours works!!

Can you add this to jacklick's 'what fixed your game today' thread?

You got it!
Jason