Panasonic AJ-D400 Operating Instructions Manual page 82

Recording
Procedures from adjusting the white balance and black balance to
stopping recording
Turn on the power, insert a cassette, and then set the various switches as follows.
AUDIO SELECT CH1/CH2: AUTO
TCG: F-RUN or R-RUN
OUTPUT: CAM/AUTO KNEE ON
GAIN: Normally, set to 0 dB. When it is too dark, it
is set to the appropriate gain.
Iris: AUTO
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