In my refurbishment of a project Shadow machine, the wall lock is having some issues.
What i understand is meant to happen, it the wall it hit once to light lock (opto switch), then again to lock the ball - when this happens, the magnet is meant to hold the ball for a few secs, drop the wall and flick it up into the lock area.
What happens on my machine is sometimes lock does not light until you are into the game a bit (i have tested the opto 100s of times and it works every time), but when it does light either of the following two things happen
1. Magnet grabs ball for a few secs, then it lets it roll back to the flippers (wall does not drop)
2. Magnet holds ball for a few secs, flings it up into the wall - which does not drop.
Now the wall drops every single time in the solenoid test BUT when you first switch the game on, it sometimes drops, but most of the time does not - although you can hear the wall up solenoid fire 3 or so times, and the target moves a bit from this action.
Its seeming to me that the signal is either too weak or two quick to actually activate the coil to drop the wall - is this possible, or would it be something else?
The wall target moves quite freely, and the spring tension to pull it down is pretty good as well.
