(Topic ID: 174022)

F14 Flipper Stuck on


By kilmarnock1350

2 years ago



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  • 8 posts
  • 2 Pinsiders participating
  • Latest reply 2 years ago by GRUMPY
  • No one calls this topic a favorite

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#1 2 years ago

Lower right flipper locks on at game start or switch tests.

Upper right flipper working correctly.

Disconnected lower flipper at the cabinet switch and this unlocked the flipper. Top flipper still works correctly.

Wiring at the flipper looks correct.

No shorts that I can tell.

How to troubleshoot a transistor?

Or other ideas?

Thanks for any help.

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#2 2 years ago

After looking at the schematics, I don't think there ARE any transistors to test in the flipper circuit.

Has to be a short?

#3 2 years ago
Quoted from kilmarnock1350:

Disconnected lower flipper at the cabinet switch and this unlocked the flipper

The short has to be in the switch.

#4 2 years ago
Quoted from GRUMPY:

The short has to be in the switch.

I thought so... but I have no continuity through the switch unless it's depressed.

#5 2 years ago
Quoted from GRUMPY:

The short has to be in the switch.

Maybe you meant EOS?

#6 2 years ago
Quoted from kilmarnock1350:

Maybe you meant EOS?

No if the EOS switch was shorted the coil would have melted when you first turned it on.

Quoted from kilmarnock1350:I thought so... but I have no continuity through the switch unless it's depressed.

Very strange that is doesn't have continuity now, when you removed the wire could you have moved something like a cap lead?

#7 2 years ago
Quoted from GRUMPY:

No if the EOS switch was shorted the coil would have melted when you first turned it on.

Very strange that is doesn't have continuity now, when you removed the wire could you have moved something like a cap lead?

I switched out the cabinet switch. That was the problem.

Weird -

The bad switch "continuity" test showed interruption until button pressed.

However, it ohm tested MUCH different that a known bad switch.

I'm not an electrician. But I know when one test shows one results and another shows another, eliminate the known bad.

Thanks.

#8 2 years ago

Take the switch apart, I bet the plastic insulation tube is missing or broken and the switch blades were touching the screw.

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