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ADJUSTMENTS
(5) White balance adjustment
1 Before adjusting white balance
Adjusting the white balance means to adjust the color tone. This adjustment is necessary for the screen to
become white when the white signal is input, and black when the black signal is input. In the actual adjustment,
the bias and gain of the CRTs for the three colors (R, G, and B) are adjusted so that the screen becomes the same
color tone.
Before performing the white balance adjustment, complete the convergence adjustment first. If not performed
properly especially where the screens join each other, the colors of the screens may not join. When performing
the adjustment, take into account the position and height of the sets, height of the eyes of those viewing the
screens, and distance to the screens. There are two types of screen white balance data-video, Y/C input and RGB
input. The data is switched when the screens are switched. For RGB input, COLOR, TINT*, and SHARPNESS
cannot be adjusted. When the ABL is OFF, ABL LEVEL cannot be adjusted.
(Note) * In the PAL signal ,TINT cannot be adjusted even in the video or Y/C input .
2 ABL switch setting
In ABL setting, when the luminance of units completely match the unit which ABL voltage is controlled the most
and luminance is lowest, the luminance of the whole multi-screen becomes low.
The ABL switch is able to switch the amount of ABL control voltage when ABL is on.
This switch has three modes-ABL1, ABL2, and ABL3.
Amount of voltage of other units adjusted to
the unit whose ABL voltage is controlled the
most
Luminance inconsistency on multi-screen
Luminance of whole multi-screen
ABL1 ABL2 ABL3
Recommended Usage of Modes
ABL1 ABL2 ABL3
When importance is placed on
consistency of luminance of
multi-screen rather than lumi-
nance level of whole multi-screen
(No gap, small amount of multi-
screens, etc.)
When importance is placed on
luminance level of whole multi-
screen rather than consistency
of luminance of multi-screen
(Outdoor, large amount of multi-
screens, etc.)
At shipment, the ABL switch will be set to ABL3.
Small
Much
High
Small
Low
Much