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  4. » Gottlieb Sys3 Blows MOSFET and Capacitor
(Topic ID: 235347)

Gottlieb Sys3 Blows MOSFET and Capacitor

By Kyrosfear

5 years ago


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  • 18 posts
  • 4 Pinsiders participating
  • Latest reply 5 years ago by crlush
  • Topic is favorited by 3 Pinsiders

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#6 5 years ago
 
TOX

ChrisHibler

Chris' Pinball Repair

US Chesterfield, MO

12y 120K 9,996 46

There is a way easier method of tieing the grounds together.
See: http://www.pinwiki.com/wiki/index.php?title=Gottlieb_System_80#Ground_Improvements_for_System_80B_at_the_Transformer_Panel_-_.22Tag_Team_Pinball.22_to_.22Spring_Break.22

The article is from the PinWiki 80B section but applies to System 3 also.

Like WhiteStar driver boards that use FETs, there are tiny connections that must be in place for the part to operate correctly. When not in place, one side effect is for the FET to switch on once and stay locked on.

Post pics of the front/back of the board. Let's have a look.
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Chris Hibler - CARGPB #31
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