Yeah, this voltage could be 2 to 7 v,
However if you remove the psu, or at least disconnected from the motherboard and you add a 3.3v voltage to pin 4.

Just as this picture shows,
http://www.ourdreambox.com/ubbthreads.ph...-psu-switch.jpg

Than this pin 2 should give 6vdc or a bit higher, at least when I tested this way, with several psu's they were al 6v+.
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