So, I haven't had sound in a while on my GTB Raven https://pinside.com/pinball/forum/topic/raven-no-sound
It used to come on every once in a while, but it played the wrong sounds or sounds that didn't belong in the game. Haven't heard anything in a while.
In a topic about logic probes, cody_chunn & wayout440 mentioned using a DMM to measure logic states, so I tried it last night.
First, I unplugged A6P1, turned it on, started a game & measured the pins on the connector. I got P1=3.46; P2=3.49, P3=0; P5=3.8; P8=0.67 & P9=3.95. However, measuring P18, the audio out, I got 0.
I also checked the 5v power supply & it was fine. On the aux. power supply, I measured between P2 & P3 & got 0, gnd to P4 = -0.13 & P6-P7 3.2. I don't think that it's the problem anyways, since the reset & test buttons on the sound board produce bongs.
I also randomly test caps on the SB. C6 = 0/11.46; C9 = -12.25/-0; C8 = 12.73/0; C10 = 12.73/0.01; C18 = 5.12/0.01; C19 = 0.01/-12.25; C20 = 2.15/0.15 & C27 = 2.15/1.6.
The problem is I have no idea how to interpret these readings or where to go from here. To me, the no audio out signal from the SB means the problem's on it. Any thoughts?