Ottawa, ON
Quoted from jmccull78:I am relatively new to this hobby, and I have a High Speed pin in very good condition. We have played 500-600 games on it...yesterday, a fuse failed to trip on an unknown error and I believe that I lost at least 1 or two transistors? Now, the ball release solenoid and the right kicker solenoid both energize upon turning on the game. I had a slight electrical smell before I realized what was occurring. There should have been a 2.5 amp slo-blow fuse on the power supply board, but I found that it was a 3 amp.
I am not sure what has caused these two solenoids to freeze in the "on" position, but I guess the first issue is to figure out the damage (or figure out what is causing the solenoids to remain energized). I can find my way around a board and do basic repair and testing as I do have a background in hobby electronics, I have just not spent much time with pinball machine boards.
I look forward to figuring this out, however right now I am a little overwhelmed.
Do you have the schematics? find out where the wires lead to on your mpu and check the driver transistor and main transistor for each coil. chances are they are shorted and need replacing. hopefully that's it and no damage made it through to any of your board chips. I'm dealing with a similar problem with my Rocky and Bullwinkle. Left slingshot energizes when game is turned on and stays on and will melt if left on.
Red Oak, TX
Dunakeszi
