Bally Solenoid voltage problem - Help!

dasvis

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Solenoidvoltageproblem.jpg


Having a problem with this '82 Mr & Mrs Pacman, just got it to boot after rebuilding the battery damaged MPU board. All voltages at every test point on every board are within spec.
The initial issue was with the RH slingshot bumper not working (#9), so I tested voltage at all 3 terminals - they were 45.1/2.3/45.1 - all should have all been 43V, as I assume all the others should be.
Anyway, I thought about it for a bit & then decided to test voltage on every coil -all of them fired in the self test, except #9.
#8 -50.4/45.1/50.4
#9 - 45.1/2.3/45.1
#6 - 56/45.2/56
#7 - 61.5/45/61.5
#11 -61.5/45/61.5
#17 -2.4/2.4/2.4
#18, 19, &20 - 61.5/2.4/61.5
#10 - 61/44/61
#13 - 2.4/2.4/55.6
#14 - 55/2.4/55
#15 - 61/2.4/61
#16 - 50/2.4/50
#12 - 61/45/61

All of the other solenoid voltages in the system tested within specs, the ones that the voltages are off are all on the same circuit, off of the solenoid expander relay. The schematic is highlighted with each problem solenoid & its #.
Any ideas? I have a feeling that someone in the past has got a wire or two hooked up wrong somewhere, I have checked for frayed wires but have found none.
 
Fixed!
Embarrased to say that I had a couple of wires connected incorrectly.......
Oh, well... a learing experience.
 
Don't worry about that. Trial and error is my motto in life. The more you mess things up and break things, then figure out what you did wrong and end up fixing it, the better you will be and the more confident in your repairs you will become. Kinda sounded like Yoda there I think.....
 
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