Mr. Pinball Tip:

If you have pop bumpers that stick and you know it is not mechanical issue as you just cleaned or electrical problem as coil is not locked on and you are scratching your head. This may help.

Get yourself a bulk VHS tape eraser. These are likely to be very cheap at flea markets, or electronic surplus stores as who uses VHS anymore. With the bulk eraser not only can you verify that you have a residual magnetic problem but you can also use it to demagnetize the parts. Usually the coil stop and plunger. Get the pop bumper to stick then with the bulk eraser 6" or so away just pulse the switch on the eraser. As soon as you do the pop bumper will relax to normal position. If this happens you know that you have a residual magnetic problem. You can even do this without taking off the playfield glass.

If you verify residual magnetic problem, you can do this:
Take pop bumper apart then with the tape eraser turned on slowly move the part(s) each part individually and slowly through the magnetic field. Do this several times turning parts 90 each pass.

I have also heard you can use a TV degaussing coil as well with same or better results. I have not tried this.

I have used this technique on Gottlieb Black Hole and a Midway baseball machine (diagnose only) and both times has shown magnetic issue quickly. Worth a shot instead of purchasing all new parts.

The 3rd sin of pinball IMO is having sticking bumpers the 1st being a flipper with a problem, the 2nd being a dirty playfield. : )

Chris Kay
Tip Archive

New tips are welcome and encouraged. Tips will be credited to those who contribute. If you would like to submit a tip click here.

For more information you may contact us by email, or by email form.
Go to: Home page, Photo Gallery, Classified Ads, Repair Tip of the Day, The Pinball Collector Register, Advertisers List, Site Map
© Copyright Mr. Pinball 2021. All Rights Reserved.