Hello,
My USB-ML-12 was recently blown up under similar circumstances. (24V to 3.3V short on target)
I measured a lot of parts short circuit and put it aside and used a demoboard as an adapter to get me by.
My board shows no sign of ill health visually.
Seeing that your board had obviously damaged a part called T? caused me to take another look at mine.
Your board is obviously a later version that supports RS08, all of the parts in the lower right corner of your photograph I do not have.
My board only has T1 and no other T? It measured as a short so I lifted one end. It was indeed shorted and the shorts on the PCB had gone.
This device is a 500mW 5.6V zener straight across pins 2 and 6 of the BDM connector.
With the zener still disconnected I tested the adapter and it works perfectly.
Hopefully this may give you some clues to continue to repair yours.
The schematic for these devices is indeed not available.
Even if you are unsuccessful in repairing yours perhaps you can gain some solace in knowing that you helped to repair mine.
BTW my T1 looks like a 1N4148 through-hole diode (1N752A). Your board has two similar looking devices.
