Problematic System 11 Pop Bumpers - Banzai Run

[DRD]

My Banzai occasionally blows a fuse and did so once during the last league meeting.

The pop bumpers are on special solenoid circuits and do not go through the switch matrix so they react slightly more quickly than the regular switches. This means they have awful triple stack leaf switches beneath the playfield which can cause chaos.

I was going to check the leaf switch stacks and also coil resistance.

Any other ideas please ? So I can nail this in one visit.

Thanks

 

[AlanJ]

if one stays down for too long it’s going to blow a fuse.

 

[Chilpin]

Check always the diodes and if keep strange, the 7402 and everything connecting after it, transistors and coil.

 

[Matt Adams]

I had a similar problem with my black hole where a sticky pop bumper was keeping the scoring switch closed a little too long and causing a reset.

 

[Epotech]

also check you have the right type of fuse, a quick blow will do just that.

 

[Chilpin]

I had a similar problem with my black hole where a sticky pop bumper was keeping the scoring switch closed a little too long and causing a reset.

Hi Matt, in you black hole the problem is sporadic? Did you check the Pin1 in the connector of the bumper board? The solder in that pin could crack and if this pin is not making contact, this can cause the pop bumper coil to lock on.
And are your pop bumpers driver board the original ones? Very early version of that board need a mandatory fix to prevent sporadic conflict with other selenoids and other weird behavior.

 

[pinballmania]

Check that the spoon is clean and not damaged. Sometimes they have a hole in. Sometimes they have sticky grease. Make sure that the end of the skirt prong is in good order. Make sure that the spoon is exactly centred on skirt prong. Adjust the spoon leaf so that the spoon is touching the prong. So now you have maximum travel when the skirt is touched. Now you've positioned the moving blade, you can adjust the fixed contact with a good gap, confident that you have lots of travel in the moving leaf to make contact and reestablish the gap with good clearance.

 

[Matt Adams]

Check that the spoon is clean and not damaged. Sometimes they have a hole in. Sometimes they have sticky grease. Make sure that the end of the skirt prong is in good order. Make sure that the spoon is exactly centred on skirt prong. Adjust the spoon leaf so that the spoon is touching the prong. So now you have maximum travel when the skirt is touched. Now you've positioned the moving blade, you can adjust the fixed contact with a good gap, confident that you have lots of travel in the moving leaf to make contact and reestablish the gap with good clearance.

Here endith the lesson

 

[Matt Adams]

Hi Matt, in you black hole the problem is sporadic? Did you check the Pin1 in the connector of the bumper board? The solder in that pin could crack and if this pin is not making contact, this can cause the pop bumper coil to lock on.
And are your pop bumpers driver board the original ones? Very early version of that board need a mandatory fix to prevent sporadic conflict with other selenoids and other weird behavior.

Hi, thanks for this, they are the original boards but it was definitely a pop bumper not returning causing the issue.