Gottlieb Super Mario Bros

jimbeam42

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Mar 14, 2010
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I recently picked this machine up and I am having a few problems with it. The gate between the flippers only comes up once in a blue moon. I'm guessing it should come up when "Super", "invincible" and when you get the "Raise Gate" bonus chance.

Can anyone confirm and give some troubleshooting ideas?

Another problem is there are a number of lamp sockets that don't appear to be functioning. I have verified they are getting power and have a good bulb. Is there a good way to recondition these sockets as a few of them are on the lamp boards.

Thanks.
 
Well, got time to troubleshoot more due to all the rain. Turned out it was bad diodes for the lamp sockets. The ones I have replaced are working now. The shield also works in test mode, the shield reset test raises it, and the shield trip test lowers it. The test works 100%of the time. Will look at it further of it keeps raining :)
 
I seemed to fix my problem with the shield. In the solenoid tests it would work fine it would raise and lower it, but in game it would never rise. The switch connected to I figured should be open when the shield was down, and when it raised there is a groove on the target that would close the switch. Tonight I went into the switch tests to make sure it was registering and switch registered fine when pressed.

So in testing I found if the switch was in the closed position when the drop target was down it worked 100% in game. It raised when "super" and when I was "invincible" it would raise and drop when hit, then raise again until the end of the invincibility.

Is this how it is supposed to be? As the switch would be closed all the time, when the target is up and down. Thanks
 
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