I posted this in the Maverick thread, but didn't get any response yet. So I figured I'd try again here.
I'm having some sound and DMD issues on my Maverick and it usually happens during multi-ball when a lot of stuff is happening all at once. It also seems like the pop bumpers stop on occasion, but I'm not sure it is related. It's kinda like the voltage drops during the game and the sound and DMD will re-set with the Lauren Belle steam whistle sounding and the DMD display resetting briefly.
I opened the back box and it looks like the the power supply board is having some low 12 volts measured at the test point.
5 volt test point = 5.03 volts.
+12 volt test point = +8.25 volts.
-12 volt test point = -12.3 volts.
I pulled the board, cleaned the pins, and reflowed solder to everything on the back side. The +12 volts is now up to about 9.9 volts. The game is resetting during multi-balls, but is working slightly better.
Any tips for what to dig into first on the power supply board? Could I possibly need to replace the DB1 bridge rectifier, or else the 4 capacitors that are 4700 micro farad/25 volts?
I'm not real familiar with how the board generates the +12 volts.