Quoted from FireballAK:I am in need of a few photos of the solenoid expander board as installed. Thanks
I can snap a picture, but I don't know what/where is the solenoid expander board.
(Topic ID: 186100)
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Black Belt
Bally, 1986
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My blue/black (pin 5) to gnd jumps around 0-1V. Pin 9 (black/red) is at 44V; Pins 2 and 3 are at 10V. Pin7 is at 44 when plugged into the board (relay). What are you trying to diagnose? Looking at the schema for the board, pins 5 and 7 are for the relay. 5 is open at rest and 7 is close at rest for the current coming from pin 9.
One more thing, if the flippers aren't working, there is a 3/4A slow blow fuse under the playfield near this board. Check to make sure that is good (take out, check with DMM).
Just to make sure:
Testing the coil: works 100%
Game play: some problems
I'm going to guess that you have a cold solder joint or a flakey relay. Especially since the board question is on the playfield next to the flippers and eject coil. First check for cold solder joints on that board or just reflow all the solder joints and see if that helps. Also check the wires soldered to the coil.
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