Quoted from Oldschool77:Also check your R32 resistor and see if it's a 2.2kohm or a 10Kohm, this is the first spot the incoming sound from the MPU daughter board hits. (this is also in my thread above). The parts list says it's supposed to be 10Kohm but i have a 2.2Kohm installed which is what the schematics say, so something is screwy there. My soundboard is an original Pin-Bot soundboard, and R32 looks untouched from what i can see so it's not a situation where someone changed it, or it's from another game. So i may try putting the 10Kohm in there and abandoning my external pot setup and see if that works.
Something to keep in mind (possibly related, in a round-about way) - the pre-DCS WPC soundboards had varying resistors on the channel inputs, depending on the game. The WPC schematics had only one value listed. But the manuals may have listed other values, and those values used on the boards. (Example - TZ's R24 is 56k, as opposed to Bride Pinbot having 150k, and 150k listed in main schematics.)
So, there may have been small changes like this between games, certainly.
Kingston, OK
