(Topic ID: 175911)

Gottlieb system 80a resets


By Sijcolo

2 years ago



Topic Stats

  • 7 posts
  • 2 Pinsiders participating
  • Latest reply 2 years ago by Sijcolo
  • Topic is favorited by 1 Pinsider

You

Linked Games

#1 2 years ago

I had a mostly functioning caveman. I replace a burned up pop bumper coil and now the game just resets. I've replaced the caps in the bottom of the cabinet and did the slam tilt fix. I'm lost at what I should do next.

#2 2 years ago

If the A1 CPU board boots, I think I'd look for a bad bridge rectifier or cracks in the solder around the header pins on the A2 power supply as a possible source cause.

Steve
System 80, not just a job, it's an adventure

#3 2 years ago

Bridge rectifiers tested fine. Disconnected the reset board and can play. When I reconnect the reset board I get the same problem.

#4 2 years ago

Cool, I like easy. The reset board isn't needed for home use. Be sure to unplug it at the reset board connector and not at TC1 on the CPU board if there are resistors installed there.

Steve
System 80, not just a job, it's an adventure

#5 2 years ago

Cool, my right side drop targets won't reset. I can test make them reset by grounding q64. Any help would be great.

Thanks,
Steve

#6 2 years ago

Have you tested the Q64 transistor with a meter and compare the readings to a known working transistor yet? Another way to test the transistor is to set the game into solenoid test 17 to see if the solenoid fires. If it doesn't, the transistor is likely bad. If it does fire, the cause could be a bad connection at the A1J4 to A3J1 interconnect.

Steve
System 80, not just a job, it's an adventure

#7 2 years ago

Thanks for the quick response. I will check that later tonight.

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