Bingo Pinballs

Created on 04-04-2014 – Last update 06-30-2020

Bryan asked for some help on Miami Beach, but this example applies to many of the 1950s Bingos`

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From: Danny Leach <bingopinballs@y>

To: Bryan Carmichael <bryan_carmichael27@>

Sent: Friday, March 14, 2014 9:33 AM

Subject: Miami Beach #13 on the backglass doesn’t light up

Hi Bryan,

Now a great many of the problems in the Bingos are mechanical, things like broken wires, dirty contacts, open bulbs – etc,

that result in an “open circuit” - Something isn’t working, because an electrical connection of some kind is broken`

open circuit …a burned out light blub

open circuit …relay arms that are bent and the contacts no longer touch correctly

open circuit ….disc wipers arms that are out of position and no longer touch the rivets correctly

open circuit …contacts/rivets that are charred/burnt/dirty and no longer contact correctly

open circuit …someone cut a wire or used paper to block some stepper contacts - etc

Mechanical problems that cause an electrical circuit not to operate`

…and this is a good place to start, in looking for your problem, start with the basics …the bulbs`

Go to quadrant K-27 on your schematic, those numbered circles, circles 1 through 25 represent the bulbs.

Those dark lines top-and-bottom are the +17v power rail ~ So, if the fuse is good, if the bulb is good

and if you have a ball in the corresponding playfield hole, the bulb will light`

In order for the circuit to work correctly: The bulb needs to be good, the socket needs to be in good shape, the wires cannot be broken, and the

contacts in the playfield hole need to be operating correctly. Everything needs to be mechanically sound, so when the playfield switch

closes it completes the circuit, current flows between the rails and lights up the bulb.

Now if the bulb and everything look good, there could be a problem on the “Search Disc”

The disc is tied right to the bulbs and playfield holes and can add in add another level of complexity, because it is a parallel current path.

Take a look at the schematic again, the search disk is shown in that same area`

See the rectangle with the diagonal lines at K-34

This search disk is one of the modules in the backbox (do you know where it is?) _ Find it and take a look! You will see it has wipers and contacts that can be bent, corroded –etc. It’s possible for a problem on the search disk to “load down” the bulb circuits. It’s possible for the search disk circuit to “take all of the current” and cause one-or-more of the bulbs to not operate.

Start with a good visual inspection: Wiper contacts not making good contact with the rivets (offset), damaged or burned out rivets,

Wiper alignment - etc. Often a good cleaning will solve problems here.

Good Luck!

Please stay in touch!

~

From: Bryan Carmichael <bryan_carmichael27@>

To: Danny Leach <bingopinballs@y>

Sent: Friday, March 24, 2014 9:33 AM

Subject: Re: Miami Beach #13 on the backglass dosen’t light up

And for the #13 not working on my Miami Beach, well it was either the search disc or the search relay.

I cleaned both & it’s working good.

~

That’s Cool Bryan

You want it fixed, …an old friend once told me to just climb in there and start working on it`

~