I have gone through all of my TEST units, and kept two of each for the archives. There are some very interesting differenced.
There is the DTL-H10000 I have only seen one of these, it reads debugger on the back. 100volts. AC
DTL-H10000, PSONE ONLY unit, cannot do DVD media, DVDR or others.
DTL-H30000 I only have one, it was supposed to be used in korea only.
DTL-H30001 NTSC, 120 volts
DTL-H30001H NTSC, 120volt, unknown difference
DTL-H30001S Also, unknown. (S for simple was one explaination)
The 3000X series will either have no "TEST" on top, or will have it rarely with
"TEST PS@" on the top. Some will have no PS2 or TEST on the top.
DTL-H30002 (pal, 220Volt)
DTL-H30002U universal, 120 volt ac for some reason
DTL-H30002U H (Sony factory modified model, units sent in to sony to have changes, unkown, have strange sony stickers replacing the normal "void if open") Some factory modded to work with 120 AND 220.
DTL-H50001 No firewire
DTL-H50001 S also, unkown.
If anyone has anything to add, or other types?