(Topic ID: 227862)

Airborne Avenger display board power issue

By GoodToBeDad

5 years ago



Topic Stats

  • 6 posts
  • 2 Pinsiders participating
  • Latest reply 5 years ago by G-P-E
  • No one calls this topic a favorite

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#1 5 years ago

I picked up a nice looking Airborne Avenger and I'm having a problem with the 90 volts on the old score display. With the power cable unplugged from the score display, the match/credit display works correctly. When the power cable is plugged in to the score display board, neither of the displays work. It seems that something on the score display board is pulling the voltage down, but I can't figure out what it is. Anyone have any ideas? Thanks!

#2 5 years ago

Still looking for what's pulling that voltage down.

#3 5 years ago

I found the power issue - there are two bad chips on the board. One of the chips I can order from Marco. The other isn't so easy to find. If someone knows where I can get an sc75004p, please let me know.

#4 5 years ago

What does the schematics say the part number should be for that one? I see other PNs on schematics but not an SC75004P.
What's the part number of the other IC?

#5 5 years ago
Quoted from G-P-E:

What does the schematics say the part number should be for that one?

The Schematic says SC75004p. There were two versions of this display board used in these machines. The one I have is referred to as the "old score display". The other version may not be using this chip.

DennisK did some digging and found what may be a good substitutes for what I'm looking for. I'm going to take a look at them and post the results back here.

#6 5 years ago

Yes --- would be interesting to see that one.
The schematics I have seen had the old National Semiconductor 584 and 585 drivers on them, haven't ever seen the SC75004P before.

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