Chicago Coin Pro Basketball - Burned Out Flash-o-matic - Need wiring help

mikemolang

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Chicago Coin Pro Basketball - Burned Out Flash-o-matic - Need wiring help

Well, THERE'S your problem! (see pics)

There are two large burn holes on the Flash-o-matic PCB. My plan is to take brass screws, grind the heads down to suit, and fasten them to the PCB with nuts. (OK, it may take a little more to keep them perfectly aligned, but you get the idea.)

The wiring for the one contact is obvious, and is still in place. However, I see no witness marks telling me what the second contact was wired to, and I know that without a path for current to flow, an unwired (or non-existent) contact would not have burned.

Help, please... Does someone have a photo (or a schem) that they are willing to share?

Thanks!
Mike
 

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In the end here is what I did:

1) Filed, scraped, and otherwise removed as much of the charred PCB as possible.

2) Applied cellophane tape over the hole, on the non-contact side.

3) Back-filled the hole with Loctite GO2 glue. The stuff is good, however for this job I would have been better off with a more rigid epoxy, and thus the next two steps.

4) The patch is more rubbery than I would like, so I used the same adhesive and bonded some epoxy laminate (thin PCB material) to the non-contact side.

5) Still more rubbery than I would like, so I used the same adhesive and bonded some epoxy laminate (thin PCB material) to the contact side. I chamfered the edge of the patch piece to give a smooth ramp for the contact to slide up and over.

6) Took two brass round-head screws and filed the heads down to contact thickness.

7) Drilled out clearance holes for the contactor screws.

8) Screwed them down with a nut, and then terminated the wires by crimping on a lug, and added a second nut to secure the lug.

9) I ended up "adding" a wire to jumper, connecting both of the replaced contacts in parallel. I say "added" because while it seems that this jumper must have been there in order for the second contact to burn out, I saw no evidence of the actual original jumper.

So far seems to work well. The machine is not completely up and running yet, so it may still need adjustment, but looking at the Flash-O-Mastic it seems to be operating correctly.

If anyone needs photos of the repair (or can comment on why this might have burned out to start with), let me know.

Best,
Mike
 
Bruned PC board

The PC boards can burn from dirt or just poor connections, the bad connections let the
contacts heat up until they are hot, therefore they " burn" through. When game is
left on, when not operating correctly, then the contacts get hot and hotter, same results.

This short explanation has nothing to do with CC Pro Basketball, just EM's in gereral.

I do have three CC Pro Basketballs. You are welcome to contact me here or my email.

Hope this helps
Richard Clark
 
Thanks Richard.

I got her up and running. Real sweet! Well, real sweet except fro the fact that both my daughter and my mother kicked my butt on it this weekend! (At least I beat the wife.)

Any chance you can send me a scan of the schem?

Best,
Mike
 
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