(Topic ID: 98241)

Gottlieb Grand Slam help needed.


By the4horse

6 years ago



Topic Stats

  • 57 posts
  • 13 Pinsiders participating
  • Latest reply 78 days ago by Teamhex
  • Topic is favorited by 4 Pinsiders

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There are 57 posts in this topic. You are on page 2 of 2.
#51 6 years ago
Quoted from DirtFlipper:

The score motor will keep running if the backbox is disconnected, as it can't detect that the reels have reached zero.

Once you have the schematic, checking the path to the score motor logic is quick.

Thanks for the backbox info dirtflipper. I'm not great with schematics, unfortunately, but I'll keep trying.

1 week later
#52 6 years ago

Just an update...it seems that the 'V' reset completed relay is only half activating. One coil plate locks in but the second doesn't. If I manually push in that second plate the score motor stops running and if I activate the trough switch the game starts up and can be played.
Can anyone help identify why this second coil on the 'V' relay doesn't activate and lock in the plate?

#53 6 years ago

That sounds like an interlock relay. The second armature activates to unlatch the first armature after an event (like reset complete).

Do you have the schematic? There's probably a 'VR' relay that resets V. A quick peek at the logic path will show.

#54 6 years ago
Quoted from DirtFlipper:

That sounds like an interlock relay. The second armature activates to unlatch the first armature after an event (like reset complete).

Do you have the schematic? There's probably a 'VR' relay that resets V. A quick peek at the logic path will show.

Yes it is an interlock relay but I can't locate the VB relay which is actuated after motor 2B makes, as some of the tags are missing & I don't have a schematic.

#55 6 years ago

Well, if you get the schematic and can post a snippet of it, it will be much quicker to resolve.

Good luck!

#56 6 years ago
Quoted from DirtFlipper:

Well, if you get the schematic and can post a snippet of it, it will be much quicker to resolve.

Good luck!

Or if someone has the schematic or owns a Grand Slam and can have a look for me, that would also work
I've been working on it for a few months now but it might be time to sell it as a non working project.
Thanks for your help...

6 years later
#57 78 days ago

Not sure if this is the complete schematic, and I know this thread is old...but it took me hours to find these pictures so Im going to post them here if anyone needs them.

1972 Gottlieb Grand Slam schematic

35EFC738-C418-4EEE-9784-E03468D5C178 (resized).jpeg7FD5931F-C49D-45A9-8AA5-8EE0DBA8D665 (resized).jpeg
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