Defender power supply installation problem (odd).

jkoolpe

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Hey all!

I got a strange one...I recently installed a Bob Roberts switching power supply on a Defender. I know that sometimes this results in a grounding issue in that the control panel stops working unless you ground it directly to the new power supply.

I did ground the supply directly to the coin door. The control panel, coin-up, and everything else works EXCEPT for the 3 test switches that control the onscreen game settings. They work fine when the original PS is reconnected, but stop working when I hook up the new switcher.

Any ideas? Do I need to hook another ground wire directly to these switches, too?

Thanks for any insight.

Jon
 
Last edited:
You have not hooked up the ground correctly.

There is a 6 position connector that used to go to the power supply. It has a Red wire, Yellow wire, White wire and a Black wire with orange stripe. Connect the Black wire with orange stripe to the Ground and everything will work fine.
 
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