Yes, I have too, no results though by the Google route. The faded model number is OUSSIPdV2. The Korean characters don't help.
This unit has had to be made in thousands, considering the quality of tooling for the case (aluminum alloy) and circuit boards.
TerraHertz's suggestions are possible but I do not know enough about such sources of illumination.
The table of switch positions on the case (see photo) says "lamp"; numbers 16, 20 --- 57 could indicate types (of lamps). Still, 300W each? Are there discharge lamps of whatever kind at this power level? What price the high frequency fed direct? Unless for some mysterious reason, there are rectifiers and things built into the 'lamps'.
I already gave a date code, on the pcb: 09.10.09.
I have just powered it up in a safe mode, and the PFC works well. With the correct switch chosen, the 385V dc shows up at the output, but only after a long time delay. Cause unknown, may even be intentional.
The inverters appear not to turn on, with any switch combination as in the table; but the LED indicator marked "inverter" blinks rapidly, perhaps indication a fault. I suspect this 'fault' is external, i.e., in that it cannot work into an open circuited load, which is my test condition. I base this on having discovered that, while there is no voltage feedback, there appears to be a CURRENT feedback from the traansformer secondary. Each transformer has two secondary windings, connected at their low ends to the a.c. input of a small diode bridge. There are what must be current shunts as 51R resistors, feeding into a LM324 op amp. It is very difficult out to trace the actual connections.
Now, I must find some way of loading the secondary to prove my point. Since the working ratings are not known even as guesstimates, I am at a loss to select a loading resistor. If indeed it is constant current device, a high load resistor is most inappropriate!
I do not know of any discharge lamps that have a working voltage of more than a couple of hundred volts. Some, e.g., may need a starting voltage of 2kV or more to strike the arc, but this should drop to 100 to 150V thereafter. I want to stand corrected if I am wrong.