Posted by Tim on 29, 2000 at 12:12 AM:
In Reply to: Anyone know some places that sell non-working pcb's or can fix them? posted by -Ace- on 19, 2000 at 7:07 PM:
It's probably not broken. Nintendo disable the sound amps on R-Type PCB's when they bought them from Irem so they could stick them in their cabinets that had sound amps in them already. So, you need to re-enable the sound amp by adding the following parts:
You need to add three caps for the M72-A-C board.
C101, C102 2200 mfd 16v, electrolytic
C108 1 mfd 25v, electrolytic
You also need to remove a wire that jumps from C108 to C102. (don't
forget the caps have a plus and minus side...)