Bronco
Gottlieb, 1977Hey guys! I’m stumped again. I have a Gottlieb Bronco and have two problems, but I’m not sure if they are related...
Problem 1: The game starts in 4 player mode when only hitting the start button once.
Problem 2: The score motor continues to run after player 4 ball 3 drains, so game over is not engaging.
I do have the schematics for the game, but I’m a novice when it come to reading them and the coin unit / player unit area of the schematics have me confused.
Any suggestions?
Quoted from Slowhand:Problem 1: The game starts in 4 player mode when only hitting the start button once.
If the Subtract Coin unit coil doesn't activate when you reset the game, inspect and diagnose this circuit with Alligator clip jumper wires.
Pinball (resized).png
Quoted from Slowhand:Problem 2: The score motor continues to run after player 4 ball 3 drains, so game over is not engaging.
Which of these switches is closed when the motor keeps running?
Pinball (resized).png
Quoted from Slowhand:Hey guys! I’m stumped again. I have a Gottlieb Bronco and have two problems, but I’m not sure if they are related...
Problem 1: The game starts in 4 player mode when only hitting the start button once.
Problem 2: The score motor continues to run after player 4 ball 3 drains, so game over is not engaging.
I do have the schematics for the game, but I’m a novice when it come to reading them and the coin unit / player unit area of the schematics have me confused.
Any suggestions?
I'd suggest you ask a local pinhead to come over and show you how to repair the machine. Some are willing to share troubleshooting techniques and can show you how to read a schematic. You need to understand basic electricity though.
When Bronco gets into the game over sequence it counts down the players for match.
So from 4-3-2-1-game over.
If it doesn't get back into the game over sequence it will stay on 4 players.
So... something is wrong with the sequence and I think it will be on one of the trip & latch relays just behind the coin stepper...
I’ve seen many coin units gummed up from solidified grease. A lot of times it’s the ratchet pawl shafts that are stuck. Take pictures of the gear side of the unit before taking it apart for proper reassembly.
Being able to read a schematic is crucial to owning an EM machine. Read this, from Clay's excellent guide: http://www.pinrepair.com/em/index3.htm#schematic
After taking your suggestions I further educated myself on schematics and was able to diagnose the problem. The previous owner of the game reassembled the stepper unit incorrectly causing the game to stay in 4 player mode. Thanks to some helpful pictures online I was able to reassemble the unit correctly and the problem went away.
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