Arcade Collecting > Pinball

Solenoid Troubleshooting and a wicked deal me thinks...

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Toadie:
I made a purchase today and the net result was a 1980's Bally Space Invaders Pinball machine for $100 bucks   :afro: 

A little dirty but no real signs of deck wear, and no odd smells.  Every light but two works and everything seems relatively good to go.  I performed the diagnostic routines as per the manual and found that I either have an issue with all of my solenoids minus the flippers, or the solenoid board which left me wondering but why would my flippers work.

Any tips?  I've never troubleshot or owned a pinball machine before.

Le Chuck:
Flippers aren't run by the solenoid board on that pin are they?  I'd think it would be the board if all the others are showing faults. 

smartbomb2084:
The MPU activates the relay on the Solenoid Driver Board to enable ground for the flippers.

If ALL your solenoids are out... check the 1 AMP fuse located on the underside of the playfield.

Nice score by the way... the backglass alone is worth twice the money you paid for the whole game if in good condition.

ChadTower:

I agree that it sounds like the playfield fuse.  It will be hidden pretty well in the middle right at the back.  Pull that fuse, check it for continuity (never eyeball a fuse, that is useless), and if it's bad replace it. 

Be prepared for it to blow again, though, and if it does you have a short coil someplace.  And likely a short driver transistor for that coil.

Toadie:
Ok, I'll check that out.  I took a quick run out to my shop and found a fuse underneath the playfield close to the front end (player side) of the machine.  Pulled it and checked for continuity... turns out that the fuse was good but I had butter fingers and dropped it LOL.  So I need a new fuse but this may have been a blessing in disguise.  In my manual it says that I should have the following:

On the A2 Power Transformer Board
2 x #18 - 20A, 32V, 3AG
1 x #15 - 3/4A, 250V, 3AG, S.B
1 x #16 - 4A, 32V, 3AG
1 X #17 - 5A,32v, 3AG
1 x #19 - 3A, 125V, 3AG, S.B


On the A3: Solenoid Driver Board
1 x #60 - 8 AG - 3 / 16 A

and a miscellaneous fuse but it doesn't say where it goes which is supposed to be 1A 3AG Slow Blow (Play Field Solenoid Protection)  I'm guessing that's the one I dropped.  I couldn't see anything mid way but I'll go back out and check.  Here's a pic in case you're curious.

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