Arcade Collecting > Pinball
My Pinball Playfield Swap - Stargate - All Electronics Done!
Buddabing:
It turns out that the left kicking target does indeed have wire continuity to the driver board. So I guess I need to test the power MOSFETs to the two non-working coils.
I had one coil soldered wrong, it is bad now. It didn't release any magic smoke but it shows an open circuit now across its terminals.
I'll probably go ahead and order three replacement coils.
I need to hook up the coin door. The coin door that was previously on there had a totally different connector to what is on there now. So I need to remove a whole bunch of small Molex connectors, preferably without damaging them. Does anyone have a good method for removing these? The Molex extractor tool I have is way too big, it was designed for power supply Molex connectors.
There is still one switch that won't register. I need to test that sucker with an ohmmeter to see if it actually closes when it appears closed.
Buddabing:
After looking at the wiring, it looks like I had those two coils wired wrong. So I swapped the wires and they still didn't work. Then I swapped out the known good coil from my brand new knocker assembly for the coil in the left kicking target, which is the same type of coil. Still no joy. So I tested the power MOSFETs. They are bad.
So, if PBR carries these MOSFETs, I'll get a couple plus some replacement fuses.
On the bright side, I was able to fix the switch that wouldn't register.
TheOtherBob:
Too bad about the coils wired backwards..... been there before.....
Ed at Greatplains would probably stock the mosfets needed as an alternate source for you.
http://www.greatplainselectronics.com/
Ed's a good guy.
Good luck with your repair!
Buddabing:
While I'm waiting for my order (coils, coil sleeves, and MOSFETs) to arrive from Pinball Resource, there are a couple of things I can work on.
Tonight I attached the slam switch to the coin door. For some reason there was nowhere to put the slam switch, so I took two 4-40 by 1" machine screws, cut off the heads, and JB Welded the screws to the coin door.
I am also working on wiring up the coin door. The old coin door took vastly different connections from the new one. So, tomorrow, I'm going to go purchase a molex extractor at my favorite electronics shop.
One problem is that I don't have the wire or connectors to hook up my knocker or coin meter. It was suggested that I just use T-Taps and plain hookup wire to connect them up. Blasphemy! Instead, there's a guy on Ebay who parted out a Stargate who didn't sell the wire harness. I'll have him cut off the appropriate connectors (with wire) and send them to me. Then, all I need is the female molex connectors and pins.
Buddabing:
Okay, I've ordered some Molex connectors and pins for the knocker and coin meter, as well as pin extractors.
Today I tried to figure out why my flippers are so weak. I figured it out, the end-of-stroke switches were wired up wrong. I fixed it and now the flippers are nice and strong. The problem is that they don't stay put. If I tighten the allen screws holding the flipper bat, then the flipper won't return to resting position. If I loosen them up, the flipper returns okay, but after a few flips the flipper works loose from the shaft and quits flipping.
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