Sony HDW-730 Operation Manual page 144

4
Adjust the lens iris.
If the lens is manually adjusted, adjust it as appropriate.
If the lens has an automatic iris, set the automatic/manual switch on
the lens to automatic.
5
Push the AUTO W/B BAL switch to WHT and release the switch.
4
The switch returns to the center position, and the adjustment is executed.
During adjustment, the message "WHITE : OP" is displayed on the
viewfinder screen (in display mode 2 or 3).
4-8
Chapter 4 Adjustments and Settings for Recording
AUTO W/B BAL switch