(Topic ID: 66093)

Silverball Mania Owners Club & Restorations Fans Also Welcome

By Hellfire

6 years ago

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  • 123 posts
  • 40 Pinsiders participating
  • Latest reply 15 days ago by slochar
  • Topic is favorited by 15 Pinsiders


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#117 40 days ago

Just joined the club! It's a really clean machine. The owner didn't know anything about pins and had never opened it up. There's a little planking, but not bad. That's the good.
The bad is very minimal. The up kicker and kick down coils were disconnected. I tested the coils and resistance is good. So, I hooked them up. The up kicker locked on power up. So, I tested the Q12 transistor and it was bad. I replaced Q12 transistor and now the coil doesn't lock on when I power up. But when I go to the solenoid test, it fires and locks on. All other coils test fine.
So, where should I go on the solenoid driver board now? Replacing Q12 was easy enough but I don't know where to go from there.
Any advice is solicited. Cheers!
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Update: I tested the resistors on the driver board and they appear to be okay. When testing the coils I noticed that one leg of the diode was loose. So, I replaced the diode and it's working now!!!

Added 39 days ago:

I spent some more time on it today. I had some phantom switches around the tilt area. Replaced the tilt cap and noticed the roll ball tilt was disconnected. I connected it and found that the 1N4148 diode was bad. Replaced that and it works great now! Repaired one bad display and it's up and running!!! I'm so luck that all the boards are good and everything is working great.
Now on to the restoration phase.

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