On Mon, 11 Aug 2008 14:46:34 GMT, put finger to
keyboard and composed:


The primary side controller is a MC33262PG.

That's a power factor correction controller:

http://www.onsemi.com/pub_link/Collateral/MC34262-D.PDF

There must be an additional PWM circuit to drive the chopper
transistor for the switchmode transformer.

Switching MOSFET: 20N60S5

The secondary schottky diodes (2): DSSK60-018A 180v 2X30A ...

Could it be that an excessive load on this particular rail is the root
cause of your problem?

- Franc Zabkar
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