Help. My Whirlwind System 11 is having solenoid trouble on the 25V side first noticed at the shooter lane solenoid not popping the ball up.
After some troubleshooting, I do not have 25V supplied to the solenoid, peaks up to about 5.6 and then drops back to ~0. The whole (brown wire) circuit has this low issue back to the F2A fuse affecting four solenoids.
If I measure the voltage on the 25VDC "C" side at F2C I see a constant 35.6V. On the rest of the 25VDC circuit after the 25VDC Supply (At W6, F1 and F3) I have the same 35.6V. On the 50VDC side I see 74.9V consistently through the circuit, before and after the A/C relay, but the 50V "C" side is not used.
I disconnected the J11 and the J4 connectors to take the coils/playfield out of the circuit and test the board. There was no change to the measurements above.
So I suspected the A/C relay because everything looked right up to the relay. When power on and am in game play I can hear the A/C relay constantly cycling and again the F2A voltage fluctuates significantly as the relay cycles. I purchased a replacement Auxiliary Power Driver board from Marco Specialties thinking this would fix the problem. It didn't; I have all of the same issues with the brand new board.
I cant understand why part of the A/C multiplex relay would function and not others.