Sony DXF-50CE Viewfinder (Monitor B&W for cameras)

8 pin DIN connector pinout (DIN-8)

    6 (red)    video input
    4 (yellow) GND (video)
    7 (brown)  +12V (power input)
    1 (black)  GND (power)
    2 (blue)   input, probably Tally (what voltage ?)
    5 (gray)   input, what ? what voltage ?