Kalley K-LED55UHDCT2, Service Manual

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Factory Test & Alignment Specification For RT92-AP Series (V1.0)
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Appendix 4: White Balance (WB) Adjustment
The White Balance generally is customized by PQ engineer, and uploaded to the PDM system, anyone
else shouldn’t change the value in the menu. If it is necessary to adjust, the following content can offer
some reference, but the process of adjusting White Balance is out of the range of this file. Please refer to
the relevant technical file of HuiZhou factory of TCL.
Calibration of Color Temperature
According to TCL standards, the color temperature and white reference coordinates of LCD like the
following table: (This standard is based on CA-310 color temperature meter as a reference)
Product
type
Color
temperature
state
Color
temperature
chromaticity coordinate
tolerance
（
X,Y
）
X Y
LCD
cold 13000K 0.270 0.270
±0.015 normal 10000K 0.280 0.290
warm 7500K 0.300 0.305

White balance adjustment takes the
Normal
color temperature of HDMI channel as the reference.

Warm
and
Cold
tone is relative to
Normal
mode. The adjustable offset or gain range is -128~127.

The
Normal
color temperature of other channel is relative to the
Normal
mode of
HDMI
channel. The
adjustable offset or gain range is also -128~127.

The manual adjustment is according to the regulation above. Additionally, when manually adjusting, it
needs to do
White Balance init
first.
Take signal generator 22293 for example, the timing value and pattern value of each source show in the
following table:
source HDMI VGA AV/ATV CMP
Timing value 69 14 38 79
Pattern value 103 103 103 103
Note: 1) The input signal is 80% white when the pattern value of 22293 is 103.
2) The adjustment of White Balance should fulfill TCL matching specification.