Talon2000
Well-known member
Had a Space Invaders Deluxe that the invader hit sound was very quiet. I checked the LM3900's to no avail, and the caps. Turned out to be a bad resistor R55, or 53 can't tell from the component layout, but it's the 470k coming from pin 3 of K4 it's part of the feedback input voltage divider I believe. Replaced and have full volume once again on that sound.
Posting this so it might help someone else in the future.
Posting this so it might help someone else in the future.