Samsung LE40R88BD Service Manual page 70

d) Adjust the high light. (Refer to table 1, 2 in adjustment position by mode)
- Adjust red gain ('x') and blue gain ('y') to the color coordinates.
* Do not adjust the green gain and sub-contrast (Y) data.
Picture 4-3 Flat W/B Pattern
3 Alignments and Adjustments
High light
Measurement point
3-13