(Topic ID: 239114)

Bally Playboy - F4 Fuse & Q12 blowing

By ShawnNYC

7 months ago

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  • 3 posts
  • 2 Pinsiders participating
  • Latest reply 7 months ago by BigAl56
  • No one calls this topic a favorite


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IMG_9694 (resized).jpg
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#1 7 months ago

So, the machine has been playing fine for quite a while now, but I walked into the room the other day and couldn't play. The F4 fuse was blown, the drop target coil was burned up and Q12 transistor was done as well. I replaced the coil, transistor & fuse, but when I started it up the fuse and transistor blew again. I tested voltage on the rectifier board test points with everything plugged in, but the driver board out and all show proper numbers.
Here's a couple of pictures of the driver board. Any help would be appreciated, as always.

IMG_9693 (resized).jpgIMG_9694 (resized).jpg
#2 7 months ago

Figured it out. I'm a dumbass.
The new coil has the diode the other way around and I connected it without realizing.

#3 7 months ago

Yep, that'll do it!

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