(Topic ID: 356463)

gottlieb oklahoma 3 & 4 player

By vipertblck

12 days ago



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#1 12 days ago

here's a rare one; gottlieb oklahoma. working out the bugs and starting with the player count. hit the credit button on front of machine and it bumps up to player 2 but that's it. won't advance to allow 3 or 4 players. looking at the relay bank down in the cabinet it looks like PB relay is used multiple different times (as in multiple relays labeled PB), and is labeled for 2nd player relay, 3rd player relay, and 4th player relay. i can manually flip the 3rd and 4th with my finger and it lights up on the head; but not pushing the credit button. i guess the first thing to check, is what fires the coil to the 3rd player PB relay and 4th player PB relay?

#2 12 days ago

Im guessing.. that the p3 coil is feed off of a NO switch on the p2 relay(closed when p2 activated) and a NC contact on the p3 stack. schematic would be useful here

#3 12 days ago

pinhead52 is right with one addition - there's a motor switch in the circuit to prevent all 3: PB2, PB3, and PB4 from activating together.
Inspect and diagnose this circuit with Alligator clip jumper wires
pasted_image (resized).pngpasted_image (resized).png
https://pinside.com/pinball/forum/topic/gottlieb-big-shot-repair#post-6305153
http://www.planetimming.com/Pinball/troubleshooting/EM%20Troubleshooting.pdf
http://www.pinrepair.com/em/index3.htm#features
Example of a pinsider actually doing this https://pinside.com/pinball/forum/topic/red-baron-tech-question#post-5858156

#4 11 days ago

i follow you guys. how do you removed the relays in that bank inside the cabinet in order to work on them? does the whole bank come up or can the relays come out of it 1 by 1?

#5 11 days ago
Quoted from HowardR:

pinhead52 is right with one addition - there's a motor switch in the circuit to prevent all 3: PB2, PB3, and PB4 from activating together.
Inspect and diagnose this circuit with Alligator clip jumper wires
[quoted image]
https://pinside.com/pinball/forum/topic/gottlieb-big-shot-repair#post-6305153
http://www.planetimming.com/Pinball/troubleshooting/EM%20Troubleshooting.pdf
http://www.pinrepair.com/em/index3.htm#features
Example of a pinsider actually doing this https://pinside.com/pinball/forum/topic/red-baron-tech-question#post-5858156

going to dig into this, hard to read the schematic you supplied. it looks like there's actually 2 motor switches in the circuit you labeled, no?

#6 11 days ago

fixed this! it was actually 1 of the 2 bank reset coils. it wasn't fully returning to it's released position. cleaned that up a bit and now it's much better.

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