Quoted from fatality83:Giving you an update.... I have been talking via email with someone who knows the model S boards well and suggested I look at a section of diodes on the board. I found one bad diode in this section of the board and replaced it. Game still does not coin up with the coin switch or free play button. If I remove the switch connector J-9 from the board and manually jump pins (from left to right) 2 & 5, it credits the game up, I hear the ball solenoid energize and it plays the start up tune and all 0's on the board stop rotating and stay constantly lit.
If I jump pins 3 & 4 with the J-9 connector removed, the score adds up 10 points each time the pins are jumped. I plugged J-9 back into the board while I was in the middle of a game to test the scoring switches. All switches register something however they appear to be giving strange values. For instance the bottom 10 point hole is registering 30 points, the 20 point hole is registering 40 points. I don't know the exact values the other ones are registering but I can check when I get home. The game appears to end after 9 balls are tossed up as the score stays lit solid and won't increase any if anymore balls are thrown. I did forget to mention I removed the ball rocker and linkage so basically the balls just rolls back down to the player all the time. I even tried thinking the game might not start without it seeing a ball activating the ball count switch but activating that switch and coining it up also did nothing.
So my issues now are, the game won't start with either the coin switch or the free play button. The only way to start a game is to jump those pins on the pcb like I said. Also the scoring switches appear to be giving out wrong values.
Any suggestions on what to do next?
Lack of coin up sounds like either a continuity problem between the connector and the switch or functionality of the switch itself. Maybe the wires have a cut; maybe the header or the pins are the issue?
The scoring switches either give 10 points or 50 points (50 points only if you have 100 point holes). The ball hits multiple 10-point switches to accumulate the 10 through 50 scores. For example throw the ball trough the 40 hole and the ball routing channel behind the playfield sends it to trigger 10 point switches for the 40, 30, 20, and 10 holes to accumulate the 40 points. A throw through a 100 hole routes past a 50 switch then all 5 10-point switches to accumulate 100 points. Elegant in the simplicity.
Sounds like your computer is capturing the "10 points" correctly when you use jumpers and with some of the 10 point switches, so check the switches themselves and their trigger arms. Perhaps the ball rolling by pushes the trigger arm to a point where the switch oscillates between contact and no-contact which causes multiple point reads. Given what you said - 10 hole scores 30 and 20 hole scores 40 - the 10 point switch for the 20 hole is fine but the 10 point switch for the 10 hole is problematic. It gets triggered when you hit the 10 and the 20 point hole, so it is messing up the scoring for both holes. It also gets triggered for a 30, 40, and 50 hit so in the current state you should see similar "overscoring" on those holes as well. If 50 scores 70 you only have the problem with the 10 hole's switch.
-Rob
-visit http://www.kahr.us to get my daughterboard that helps fix WPC pinball resets or my replacement LED display boards for model H & model S Skee Ball