Hey guys,

To test the Monkey switch, you need to test it with and without a ball. If you go into the monkey magnet test (under device tests), you can hit the start button to activate the magnet. The switch should NOT be active when this happens. In the test, you should see the box for the magnet active, but not the switch. Then, hit the start button again, but this time with a ball on the magnet(easy to test this by having the playfield pulled up and on the first rail position). Now, your monkey magnet detect switch should be active along with the magnet. This switch will only ever activate if there is an active magnet present. Just putting a ball next to it won't do anything. Some of the games were built before this mode was fully vested out, so the switches may not be calibrated in the right position, and could use adjustment.

If your switch is always active when the magnet is on, you will need to re-position the switch. Try holding it in a place you can mount it, and try the magnet with and without a ball on it to see if it trips the way it should (only with a ball on it). Once you find a good spot, screw it back down and test it again.

Another complication is that the switch is a Hall Effect sensor, and will only sense a certain magnetic field orientation. If the big magnet underneath the playfield is not North South relative to the playfield, your hall effect sensor will not register. Because the magnet can be mounted in either direction, and there is no indication, there are a couple things you can do to make sure yours is correct, or simple ways to change it. Easiest thing to do is just flip the monkey magnet detect board over (so the hall effect, resistor, and connector are now away from the panel instead of against it, or vice-verse).

Hope this helps.

Eric