White Balance Adjustment - TCL 21F1 NX56E-LA Service Manual

TCL-THOMSON Electronics R&D Center (Shen'Zhen Lab)

3.4 White Balance Adjustment

1. Input a black and white pattern to RF input.
2. Enter P-Mode, press key "3 " to select white balance adjustment menu.
3. Use the color analyzer to measure the black side of the screen. Adjust the value of
"RC","GC" and "BC" to set the reading of the color analyzer to x=274, y=280. (11500 K).
4. Then measure the white side of the screen. Adjust the value of "RD", "GD" and "BD" to
set the reading of the color analyzer to x=274, y=280. (11500 K).
5. Repeat step 3&4 until you can get the correct reading for both black and white sides.
*Notes:
A. The "SUBB" and "SubCON" items are used to assistant the white balance adjustment.
It is the same function as the user OSD menu "Brightness" and "Contrast" items. You can
adjust these items to get the expect intensity when adjusting the white balance.
B. YUV white balance black level offset setup:
It is not need to adjust the white balance for YUV mode when production, but the
BLOR-Y, BLOG-Y and BLOB-Y items which locate in EEPROM address 0x0A, 0x0B and
0x0C need to write in the right values to set the YUV mode black level offset before
production. These offset values should be written by the PE engineer when making the
EEPROM copy for the new lot with difference tube.
Table 3.4.1: The White Balance adjustment setup and option page "3"
OSD menu Default Value
RC 32
GC 32
BC 32
RD 37
GD 32
BD 37
BLOC 8
Chassis Name
Issued on
Updated on
Picture 3.3
Description
R cut-off setting(BLOR)
G cut-off setting(BLOG)
B cut-off setting(BLOB)
R drive setting(WPR)
G drive setting(WPG)
B drive setting(WPB)
Black level offset course(BLOC)
NX56-LA
2008-05-19
2010-01-27
Serial No.
Page Page 8 of 15
Version 2.2
Remark
Adjust to right value
Adjust to right value
Adjust to right value
Adjust to right value
Adjust to right value
Adjust to right value
Adjust to right valuege