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6. Alignments
Index of this chapter:
6.1 General Alignment Conditions
6.2 Hardware Alignments
6.3 Auto Colour for ADC Calibration
6.4 White Balance Adjustment
6.5 Option Settings
Note: The Service Alignment Mode (SAM) are described in
chapter
5. Service Modes, Error Codes, and Fault
Menu navigation is done with the CURSOR UP, DOWN, LEFT
or RIGHT keys of the remote control transmitter.
6.1
General Alignment Conditions
Perform all electrical adjustments under the following
conditions:
•
Power supply voltage: 195 - 264 V
•
Connect the set to the mains via an isolation transformer
with low internal resistance.
•
Allow the set to warm up for approximately 15 minutes.
•
Measure voltages and waveforms in relation to correct
ground.
Caution: It is not allowed to use heatsinks as ground.
•
Test probe: R
> 10 MΩ, C
i
•
Use an isolated trimmer/screwdriver to perform
alignments.
6.2
Hardware Alignments
Not applicable.
6.3
Auto Colour for ADC Calibration
6.3.1
For EXT2(Y/Pb/Pr) source
Equipment requirements:
Use QuantumData 802BT or equivalent equipments.
Input requirements:
Input Signal Type: YPbPr signal
•
Set Timing mode at 720p 50 mode.
Pattern:
Apply SMPTE133 Pattern, see
Figure 6-1 SMPTE133 pattern
Finding.
, 50/60 Hz ± 3 Hz.
AC
< 20 pF.
i
Figure
6-1.
18860_204_100507.eps
100806
Alignments
TPN1.1HA LA
Process
1. Press the following key sequence on the remote control
transmitter: "MENU 1 9 9 9", see
2. Press B, y to move cursor to "Auto Color".
3. Press Go to do "ADC Gain" and "ADC Offset".
4. "Exit".
Current Source : CVI
Auto Color
: Go
ADC Offset
: R xxx
ADC Gain
: R xxx
Color Temp
: Normal
Scaler Offset
: R 128 G 128
Scaler Gain
: R xxx G xxx
...
Exit
Note: xxx is digit number
Figure 6-2 OSD in factory mode
6.3.2
For VGA (R/G/B) source
Requirement:
1. Use Chroma 2226 or equivalent equipments.
2. Set Timing mode at 1360 × 768 at 60 Hz.
3. Apply SMPTE-133 pattern, see
Black (0% gray level); step 2 = White (100% gray level).
Process
1. Enter factory mode, then refer to
6.4
White Balance Adjustment
6.4.1
General set-up
Equipment requirements:
QuantumData 802BT and CS-200/1000.
Input requirements:
Flat (100% gray level, Full White Pattern).
Input signal timing:
720p 50.
Input Injection Point:
YPbPr input (EXT 2).
Warm-up time:
60 ~ 120 mins @ 25 °C.
Note: The test pattern must always keep same, as well as
pattern generation and timing, to avoid "Dynamic Contrast" and
"Dynamic Backlight" activited at unknown condition. These
parameters are located at "Dig. CrystalClear" of OSD.
6.4.2
Alignment Request in the centre of the screen
Pre-check panel uniformity is OK and Pre-check "White
Original Surface Luminance", Scaler R/G/B gain = 127.
•
32" panel: > 360 cd/m
•
37" panel: > 400 cd/m
•
42" panel: > 400 cd/m
Adjusting "Scaler Gain" in factory mode. The R/G/B gain value
should be below 127 to avoid saturation at the 11-step grey
pattern.
6.
EN 19
Figure
6-2.
G xxx
B xxx
G xxx
B xxx
B 128
B xxx
19020_209_100729.eps
100729
Figure
6-1. step 1 =
Figure
6-2.
2
.
2
.
2
.
2010-Aug-13
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