I need a 42v DC adapter for charging a battery pack. I have this 54v DC brick from a broken PoE switch and want to change the output voltage.
I've taken it apart and tried to locate the voltage divider that sets the reference, but can't identify the controller and don't feel safe poking around 220V AC (and 54V DC).
The powerbrick is a FSP Group FSP090-DMBC1.
The two yellow/green spots on the are connected with piece of PCB shield. Down in the left corner there's a diode bridge with part number FEP16GT.
The IC looks like it ends with 75ST.