low voltage

Hunter

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Sep 6, 2010
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Missouri
I am trying to diagnose a problem with my Jamma machine. I think I found the problem - at no load condition my +12V is outputting 8V. There doesn't seem to be a pot to adjust this (like there is for the +5). Any tips on what is causing this and how to repair? Thanks, much appreaciated.
 
Many switching regulator power supplies MUST have a normal load connected or you'll get false/weird/low readings.
 
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