Philips 20PFL4122/93, Service Manual

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54
TPS 1.0A LA
8. Alignments
Index of this chapter:
8.1 Electrical Instructions
8.2 ISP Instructions
8.3 Serial Number Definition
8.1 Electrical Instructions
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.
8. Alignments
8.1.2 PC mode Display Adjustment
8.1.2.1 AUTO Color adjustment (B)
Set Brightness 100 and Contrast 50 and apply 640x480 @60Hz
Mode with 50 Black and 50 White pattern at the factory mode
Activate AUTO-COLOR function for auto ADC offset and gain setup.
Figure 1. 50-Black 50-White
Color Temp alignment is automatically set during TV alignment according
to 4.1.3.Apply full white pattern , check picture must satisfy table 6.
Table 6. Reading with Minolta CA-210.
Color Temp x y
Normal 0.291 ± 0.005 0.302 ± 0.005
8.1.1 TV Mode display adjust
8.1.1.1 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 ( for China
model ) with white pattern of 100%
Set to PAL B/G system, frequency=64.25MHz ( for AP
model ) 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 PERSONAL
(Brightness 50,
Contrast 50, and Color 50). Adjusting SCALER GAIN R G B to
reach W/D and luminance in factory mode as below.
Select Color Temp in the factory Mode OSD.The 1931
CIE chromaticity (X, Y) co-ordinates shall be:
Table 4. Reading with Minolta CA-210.
Color Temp x y
Normal 0.291
±
0.005 0.302
±
0.005
Warm 0.314
±
0.005 0.324
±
0.005
Cool
0.273
±
0.005 0.280
±
0.005
Luminance > 350 cd/m
2
in the center of the screen when
Smart picture at "Personal "and Color temp "Coo "
These group settings about color temp are also applied
automatically into CVI/SIDE AV/ /PC/DVI. That means
TV/CVI/SIDE AV/PC/DVI are used the same setting.
Luminance> 400 cd/m
2
in the center of the screen when
both PC Brightness and Contrast control are 100%.
8.1.2.2 Display quality adjustment
Use timing mode as described in 2.2, and uses the
POPO (pixel on pixel off) patternto adjust the clock
until no stripe and adjust the phase until clear picture.
(AUTO ADJUST hot key: press Volume – and Volume
+ keys together for 1 second.)Check all preset 7
modes.
8.1.2.3 Check the analog interface cable
Check the color poor & noise condition of 64 gray scale pattern.
8.1.3 Comp video Mode display adjust
8.1.3.1 Auto Color Adjustment (B)
General set-up:
Equipment : Quantum Data Pattern Generator
801GD or 802G or 802R;
Apply 576i, and the pattern STMPEbar shown in figure 2.
Figure 2. SMTPEbar
Alignment method:
Initial Set-up : Set Smart picture as "Persona" (Brightness=50,
Contrast=50, Color=50);
Access to factory OSD first, then to enable AUTO-COLOR to
get HD ADC OFFSET and HD ADC GAIN. Check 32 gray scales
can be distinguishable.
8.1.3.2 Color Temp alignment is automatically set during TV alignment
Clear image Clear image
Measurement/viewing selector Measurement/viewing selector
If you have not CA-110,the following R,G and B values are
for your reference
Normal Cool Warm
R 120 119 122
G 124 116 112
B 120 128 105