Date: Fri, 19 Aug 2005 15:17:48 -0600
From: Doug McNutt <[EMAIL PROTECTED]>
But hear this: A REQUIRED piece of equipment is an isolation transformer
capable of supplying ungrounded AC power to the supply being repaired. That
will allow you to examine the input side circuitry of the power supply with
grounded equipment like an oscilloscope. Most supplies start with a voltage
doubler that produces about 350 VDC on the power transistor and it's negative
side does not correspond to earth ground. Probing around with such a supply
plugged directly into the wall is a good way to burn out a meter or
get a nasty
shock.
Thank you, Doug. That's some really important information to know.
Jeff Walther
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