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Author Topic: WPC 89 CPU Battery Mod  (Read 1933 times)

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smartbomb2084

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WPC 89 CPU Battery Mod
« on: October 01, 2011, 06:12:19 pm »
This always worked well to replace the AA batteries on Williams' video game CPU boards such as DEFENDER and the like and it works well here too.  It does cramp the U10 reset chip a little but it is a CR2032 Lithium battery that will never leak.
« Last Edit: October 01, 2011, 06:24:03 pm by smartbomb2084 »
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smartbomb2084

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Re: WPC 89 CPU Battery Mod
« Reply #1 on: October 02, 2011, 08:39:19 am »
You're right not my idea but we were putting these on DEFENDER and ROBOTRON before System 3 and I have never seen it done to a WPC board.

Besides many Japanese JAMMA game boards had them first too so maybe Gottlieb is the real thief here.
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