(Topic ID: 250796)

Harlem Globetrotters help please

By Don44

42 days ago

Topic Stats

  • 44 posts
  • 5 Pinsiders participating
  • Latest reply 2 days ago by Don44
  • No one calls this topic a favorite


Linked Games

Topic Gallery

There have been 9 images uploaded to this topic. (View topic image gallery).

image (resized).jpg
image (resized).jpg
image (resized).jpg
image (resized).jpg
9DC0932B-5CAA-462F-87E3-F5648EE8938E (resized).jpeg
F8D28344-F916-443D-8785-54CD80FF7216 (resized).jpeg
5837E874-970F-44FF-9D04-AEDD2543DCC6 (resized).jpeg
16E3316E-3092-4571-812E-D31284A9A611 (resized).jpeg

You're currently viewing posts by Pinsider slochar.
Click here to go back to viewing the entire thread.

#5 42 days ago
Quoted from Don44:

I took a look and there is not a transistor at Q18. Is there supposed to be one there? Could it not being there cause the coils to lock on? Any idea what transistor it is?

That's for an unused coil spot on your game, don't worry about that. The main driving transistors can be replaced with Tip 102's.

You should check out the predriver chip though as well. You can test things out by removing the large connectors from the board (leave the smaller ones to the right) so that you don't blow the fuse again, with either a logic probe or a volt meter - you're looking for shorts to ground on the pins that go to the game, and the 3081 chip's pins.

Head to pinwiki.com and look in the bally/stern section for information on how to do this or search for it here. Basically you're going to have shorted driver transistor, shorted pre-driver chip, or a bad decoder (unlikely).

Promoted items from the Pinside Marketplace
Machine - For Sale
Radford, VA
$ 21.00
$ 14.50
Machine - For Trade
San Mateo, CA
From: $ 15.00
From: $ 13.00
Third Coast Pinball
From: $ 140.00
$ 30.00
Third Coast Pinball

You're currently viewing posts by Pinsider slochar.
Click here to go back to viewing the entire thread.

Hey there! Got a moment?

Great to see you're enjoying Pinside! Did you know Pinside is able to run thanks to donations from our visitors? Please donate to Pinside, support the site and get anext to your username to show for it! Donate to Pinside