Sony HDW-F900 Operation Manual page 80

2
Push the AUTO W/B BAL switch to BLK and release the switch.
4
AUTO W/B BAL switch
The switch returns to the center position, and the adjustment is
completed.
During adjustment, the following message is displayed on the viewfinder
screen.
The black balance adjustment ends in a few seconds with the message
"ABB:OK" and the adjustment setting is automatically stored in
memory.
4-3
Chapter 4 Adjustments and Settings for Recording