This isn't balanced, nor is there any phantom power.
Designed for carbon microphone headsets. DC voltage is supplied to the microphone from the camera adaptor back end, of +8.8 volts through a 220Ω resistor, and a single transistor provides a DC coupled buffered output feed to the 32-pin camera connector. The earpiece connects through a volume control pot to the 32-pin camera connector. Either A- or B-type ¼″ phone plugs can be used.
Is a mono tip and sleeve connector, it connects through the volume control (a dual gang pot that does the intercom and audio monitor volume levels, simultaneously), to a buffer amplifier in the camera adaptor. It can be switched to monitor the microphone amplifier in the camera, or playback audio fed into the 32-pin camera connector (the switch is in the spring-loaded side panel, below the BNC connectors).
This is standard wiring for all four-pin S-Video connectors.
This is a common power wiring pinout for many professional devices. Power consumption is 1.3 amps for the head, alone. Or 1.5 amps, in ENG configuration (with small 1″ viewfinder, lens, but not including the VTR's power consumption). Or 2.3 amps, in studio configuration (with large 5″ viewfinder and lens). The power supply should be regulated, and it appears that 15.5 volts is the maximum permitted input. Camera function becomes impaired below 11 volts, and automatically shuts off around 10.5 volts. The large viewfinder's front tally light switching on and off will affect other circuitry, if the power supply is less than 12 volts.
+12 volt pins 9, 10, & 19 are wired together.
Ground pins 1, 18, 20, 24, 28 & 29 are wired together.
Audio ground pins 13 & 14 are wired together, and not directly
connected to the main ground.