Ok, I'm still having problems. In that manual, it states that to access the hard and soft dip settings for the machine, you press the test button located inside the cabinet. I've located two red buttons next two one another inside the cab with what looks to be some sort of volume control next to them. These are found right next to the coin mech. One of the buttons is labeled 'Test', the other labelled 'Service' and the knob is labelled 'Volume'. Two wires are coming from the 'Test' button, one is going into the cab, while the other goes back up into the 'Service' button. Woah... Newbie anxiety here...
Now, when I press the 'Test' button when the machine is on, nothing happens at all, but when I press the 'Service' button, it gives me free credits.
So does it sound like the 'Test' button is broken? I really have no idea..