Set this switch to the desired position while observing the sharpness of the picture. 123. Red and Blue Gain Controls (R GAIN/B GAIN) These controls are used to manually adjust the white balance. These controls only work when the White/Black Balance Selection Switch (126) is set to the MANU position. Turn the controls clockwise to increase the red and blue signal levels, and counterclockwise to decrease these levels. Note: As these controls employ Digital Processing, the Red and Blue signa