On Mon, 25 May 2009 15:12:57 -0700 (PDT), b
put finger to keyboard and composed:

Quick update::
I have discovered that the psu operates normally (at least, I measured
the 123v and it was Ok) if R704 is lifted. Somehow I didn't do this
test earlier (would have saved me some time!)
Tracing it back, you can see here :
http://www.fileden.com/files/2007/6/...p380%20cu.jpeg

...that it goes via a UPC 574 stabilizer to pin marked VT on i701.
My question is: could this mean the stablizer is faulty, or the ic? I
wouldn't fancy changing the latter....

R703 and R704 present a resistance of about 11K to a 123V supply. If
IC701 was shorted, then the current draw would be about 11mA. I don't
see why this would load your supply.

- Franc Zabkar
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