Philips 37PFL7422/79, Service Manual

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TPT1.2A LA
8. Alignments
8. Alignments
Index of this chapter:
8.1 Electrical Instructions
8.2
8.3 Serial Number Definition
Software Updrate With ISPWriter
Notes: You could adjust the LCD/TV following this chapter when the LCD/TV has the below defect.
1. Change panel. 2. Change or repair main board. 3. LCD/TV color is not right. 4. The settings are disabled.
Clear image Clear image
Measurement/viewing selector Measurement/viewing selector
8.1 Electrical Instructions
8.1.1 TV Mode display adjust
White balance adjustment (B)
General set-up:
Equipment Requirements: Color analyzer.
Input requirements:
Input Signal Type: RF signal
Set to PAL D/K system, frequency=184.25MHz with white pattern of 100%
Input Signal Strength : 10mV (80 dBuV) terminal voltage.
Input Injection Point : TV Tuner input
Color Temp Alignment (B)
Apply full white pattern, select smart setting to be RICH . Adjusting Cool SCALER GAIN RG B to reach W/D and
luminance in factory mode
Adjust Cool R, G, B in factory OSD. The 1931 CIE chromaticity (X, Y) co-ordinates
shall be:
Table 1. Reading with Minolta CA-210.
Picture Mode x y
Normal (Original)
0.274
±
0.005 0.279
±
0.005
Luminance > 400 cd/m
2
in the center of the screen when both contrast and brightness are 100%.
Set color temp is "WARM" or "NORMAL", their gains are as table 2.They should be
saved in EEPROM by the auto-alignment station of factory.
Table 2. relationship between three kinds of color temp
COOL NORMAI WARM
Scaler R Gain R' R' R'
Scaler G Gain G' G' G'-5
Scaler B Gain B' B'-8 B'-27
If you have not CA-210, the following R,G and B values are for your reference.
COOL NORMAI WARM
R 119 119 119
G 119 119 114
B 124 116 97
This group setting about color temp is also applied in TV/HDMI 1/HDMI 2/
CVI 1/CVI 2/ AV/ SideAV/PC. It means that TV/HDMI 1/HDMI 2/ CVI 1/CVI 2/ AV/ SideAV /PC use one same setting.
8.1.2 PC mode Display Adjustment
WHITE-D adjustment
At factory mode apply both 1024X768 @60Hz and 1920x1080/60Hz mode with TVBAR100 pattern in
QuantumData 802R/ 802G/802BT as figure 1. . Set smart picture at "Normal" , and set
Brightness and contrast to be 50%.
Activate AUTO-COLOR function for auto ADC offset and gain setup.