Harmon Kardon PSU

[AdamHerbst]

Hello Everyone,
Very new to how everything works and im wonder why im not getting any voltage on the secondary side of the SMPS.
With all the different feedback ic's being interlayed with eachother its hard finding a point to start at. Im guessing both Power_hi, and VCC_AMP_on have to be pulled up in order to work. The 7VD goes to a 3.3V converter into the mcu which controls the transistors. But the transformer that ouputs 7VD is controlled by the IC?

What would be the best way to diagnose as to why the SMPS is not working? Thank you in advance for your time and knowledge
~ Adam

[xavier60]

ST+5V is the first thing that needs to be up.