Haier LT26M1C, Service Manual

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26”LCD TV Haier LT26M1CA&LT26M1C
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7. White Balance, Luminance Adjustment
In order to make the color of the picture be normal, we should do the whit balance adjustment as below.
Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment.
YPbPr Mode Display Adjustment
White balance adjustment (B)
General set-up :
Equipment Requirements: Minolta CA-110 or Equivalent Color analyzer, Quantum Data Pattern Generator 802G,
802BT or equivalent instrument
Input Signal Type: YPbPr signal
1. 720P mode, TVBar100 pattern by 802G or 802BT.
2. Select Smart picture to User mode and check the x, y data.
Input Signal Strength: 1 Vpp for Y signal; 700 mVpp for Pb & Pr signal
Input Injection Point: YPbPr (RAC jack)
720P, TVBar100 pattern
Alignment method:
Initial Set-up:
1. Select source as “Component”.
2. Set Picture mode as “User” and to be Contrast =50 (CMO), Brightness=50 (CMO), at normal menu mode.
3. Apply “TVBar100” pattern with color bar pattern by signal generator.
4. Enter factory mode menu: press Numeric keys “062596” + DISPLAY key. (FAC mode menu).Then select
“Factory” item.
Alignment:
1. At FAC mode menu, select AUTO_COLOR item. Then press “OK” key to adjust ADC_GAIN_R, ADC_GAIN_G,
ADC_GAIN_B and ADC_OFFSET_R, ADC_OFFSET_G, ADC_OFFSET_B. Then store those values to NVM.
2. Apply Flat80 pattern (80% white pattern).
3. Set color temperature to “NORMAL”.
4. At FAC mode menu, adjust the CLR TEMP R, CLR TEMP G, CLR TEMP B values to meet “NORMAL” color
coordinates specification below. Then store those values to NVM.
Color temperature Normal/Warm/Cold (x, y) co-ordinates specification:
Normal Cool Warm
CCT 6500º K 7500º K 5800º K
x
0.314
±
0.025 0.300
±
0.025 0.326
±
0.025
y
0.324
±
0.025 0.310
±
0.025 0.335
±
0.025
Table: Reading with Minolta CA-110.
5. Check the 16 grayscale pattern should be distinguished and color bar is correct