O.K Albert,
. I've found theDennis' documents you mentioned on how to build a complete dummy supply load for the 7104/7854 SMPS.
I will buy the necessary resistors... :-/
BUT the document only mentions the connections to be made (using the dummy load) towards P82.
IMHO the connections to P83 that performs the voltage sensing should also be wired in an appropriate manner.
Otherwise the low voltage regulator (board A22, schematic 16) cannot work!
Thanks G?ran for your suggestion regarding diode checking.
I only checked them using my analog VOM Supertester ICE 680R in ohmic mode and no defects was revealed.
I will try to measure them using the oscilloscope and differential probe.
Max Mazza (from near Venice, Italy)
