Greetings,

This is my first pin that I picked up for super cheap a few weeks ago. When I tested it before buying just about everything worked. I've cleaned the machine, rebuilt the flippers, replaced the rubber, and made all required repairs. I am experiencing one issue I could use some help with though:

Sometimes I power the pin up and everything works as expected. Other times none of the playfield lights will light up when powered on but they will all flicker anytime a pop bumper or sling is struck during play. This includes the pop bumper lights that should only light once the ball enters one of two upper holes and all the insert lights which only one should ever be lit at a time. Cycling power doesn't seem to solve the problem. It will work fine for a day or two and then back to no lights/flashing when struck for a few days, and then back again.

What should I be looking for? Any feedback would be greatly appreciated.

All,

Appreciate the feedback. Before I started searching with all the advice above last night I plugged the machine in for a quick game. Now for whatever reason when I press the left flipper to reset the machine it will reset the reals to zero but then the motor keeps spinning when I hit the start button. It has never done this before in the few months that I've had it. No idea what changed between the day before and last night but now that motor just turns those cams forever and never starts a game. I'll try and get a video posted to show the issue.

The new much larger issue:

Yes I just came up from the basement to report that the RESET RELAY is closing but never opening (it's constantly energized).

Where can I learn more about the reset sequence?

In the area of good news I have GI lights back on. I rotated the 4 fuses around in their sockets in case there was some corrosion or bad contact point. That brought the GI back to life.

What I have found in my research so far:

Williams Start-Up Sequence:

1. When the start button is pressed, the credit unit is decremented. This is done through the credit unit zero position switch and the 2nd coin relay (and the ball count zero position switch).

2. The end of stroke (EOS) switch on the credit unit decrement coil will energize the coin relay.

3. The coin relay will trip the game over relay.

4. The coin relay will energize the reset relay. The score motor will run.

5. The reset relay will energize the ball count unit reset, through the score motor.

6. The reset relay energizes the 2nd coin relay latch and game over relay latch coils.

7. The reset relay will energize the score reset relays, through the score motor.

8. The score reel reset relays will zero the score reels, through the score motor. The score motor will continue to activate the score reset relays until all the score reels reach the zero position.

9. The reset relay activates the bonus unit coil until the bonus unit zero position switch is activated.

10. When the bonus relay drops out, the outhole relay is energized through a different bonus unit zero switch and score motor switch.

11. The outhole relay will run the score motor. The bonus unit will step up once. The ball will be kicked to the shooter lane.

Copy that. Stuck somewhere in Step 8 of the sequence it sounds like. Back to the basement!

And we are up and working again!

When the real is at zero there is a cam that opens all the leaf switches for that real. Following the advice provided above and using a flashlight it was pretty easy to check and see if light was getting through each contact when the real was set to zero. Sure enough the most significant bit real on player one had a leaf switch touching even when the real was set at zero and the cam was engaged. I bent the leaf switch just enough to break the contact, powered on the machine, and bingo she kicks out a ball and is ready to go.

What puzzles me now is how that switch got out of adjustment from one day to the next?

Again thank you all for the input and help. I'm probably going to start a new thread so I can understand what is missing from my bell mechanism and why I am having to manually add credits via the backbox vs. the coin mech.