(Topic ID: 115115)

No Fear F104 Blowing

By Tigger

9 years ago



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#1 9 years ago

I've replaced f104 several times and after about 10 minutes of play it blows again. Verified I used the correct fuse. What is strange is the manual says f104 is for solenoid 9-16....but those solenoids work in test mode and 1-8 do not work. F105 is not blown. Really confusing. Appreciate any insight from pinsiders. Thanks

#2 9 years ago

More info. Put in test mode - repeat- and solenoid 7 knocker sounds like it locks. It blew f104.

#3 9 years ago

More than likely, the transistor is shorted that drives that coil.

#4 9 years ago

Perhaps just unplug the knocker for now.

#5 9 years ago

Thanks. Unplugged for now so I can get my pinball fix. Thx indypinhead will test transistors 68 67 62 and report back.

3 weeks later
#6 9 years ago

Too lazy to check the transistor. Been playing without knocker.

1 week later
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