Hey, I just bought a pair of those eq's too. I googled around and found this...
We maintain a console master book from a Mitsubishi Filmstar console that has docs on the 3-Band Semi-Parametric eq. The pinout should be the same for all similar Mitsubishi era eqs, but without additional information I recommend checking everything twice......err,... or maybe three times.
Pin# / Signal
8b / -18vdc
9b / +18vdc
10b / Audio Common
11a/b / eq out
13a/b / eq in -
15a/b / eq in+
Probe the connector, check the pcb for correct components at each pin and be very careful before connecting power.
I haven't tried hooking mine up yet...did you ever get a hold of the actual schematics for the 82041?