Quoted from onemoresean:Is this cap installed backwards?
Indeed it is backwards..
Quoted from onemoresean:Would this cause damage to other components on the board being installed this way?
Nope. Just replace it.
(Topic ID: 260533)
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Be aware that 5 volt regulator is likely a Chinese fake. It's not a real 3 amp LM323K, it's more likely a remarked 1 amp 7805. It will shutdown under load of your pinball.
See the links at this post with internal pictures of fake vs real thing.
https://pinside.com/pinball/forum/topic/bally-solenoid-driver-voltage-regulator-board-woes#post-4929361
The giveaway is the large blue dielectric around the pins.
Quoted from onemoresean:The manual shows TP5 at 11.9 and I'm at 16.7, is this a problem?
That's a mistake in the manual. When the capacitor at C23 is introduced to the 11.9V circuit, it filters DC ripple bringing up the DC voltage between 14.5 - 17 volts.
Yours is a little on the high side. I would check that the transformer is wired for the correct AC voltage coming out of your mains wall socket.
Quoted from onemoresean:I just received this from Big Daddy, is there a known issue with his regulators?
Those fake regulators are low current spec and the load of your pinball will draw too much current from it causing the regulator to shutdown/fail from overcurrent.
Quoted from onemoresean:This is the one I pulled from the board, should I put it back in?
If there was no known issue with the original regulator, put it back. That original was a high spec 5 amp regulator.
Post a picture of the bottom of that suspect fake when you pull it out - if it has the large blue dielectric around the pins it is certainly counterfeit.
In the meantime if you're bored here's two threads with issues running those fake regulators:
https://pinside.com/pinball/forum/topic/bally-solenoid-driver-voltage-regulator-board-woes
https://pinside.com/pinball/forum/topic/bally-vector-restoration-help
Yep, you got a fake part there. Suggest you contact BigDaddy and point him to the threads I listed above showing the internals.
Quoted from onemoresean:Is the old regulator the correct part?
Most certainly is. It's a ua78H05 5 volt 5 amp regulator and was commonly fitted to those boards at factory.
2 months later
Quoted from onemoresean:I put the old regulator back in and I'm up and running.
How do I test the suspect 5v regulator out of circuit to see if it's up to spec?
Did you try using the new regulator before putting the old one back and if yes, what was the outcome?
Can you please measure the resistance between the outer case of the new regulator and the output pin.
Give me both readings with the meter leads one way, then swap the leads around.
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