Hi zaza, i have some interesting news about the GI.
I have been going over this game thoroughly, and shopping it all out. I discovered the GI issue while running through all the tests. I got the game all back together, and playing yesterday, but noticed that it was resetting when coils would fire, during multiball etc. Typical watchdog circuit resets.
I thought it may have been low voltage from my garage outlet, so i gave it a test, and it was 122 volts. I then went to the pinwiki, to go down the line of possibilities. I checked the convenience outlet, and it was good with game on and off. I reseated the transformer connections, but was still getting resets.
I then reseated J101, and then the resets diminished significantly. Out of curiosity, i checked on the GI DIMMING, and now the GI dim during the test as they should.
So GI problem solved??
Thank you so much again for your time and guidance on this issue. Ive learned some new things along the way. I will now keep my eyes out for a new meter with an HZ setting.
I also read up a little on the coin doubler board. You are correct, the board allows the software to give a credit with 1 coin drop instead if 2. From what i read, williams made the software require a minimum of 2 coin drops, and this board bipasses that issue making 1 coin act as 2.
My game had been set to FREE PLAY since i obtained it. I turned off free pay to see how the doubler works, then found out i have one more issue to fix.
My left coin slot is inoperable. Right coin slot works fine. I tested the coin switch, and it is good. Im going to have to start checking further into this left coin circuit now. Thanks. Sparky