Alignments - Philips PICO 19PFL3405/12 Service Manual

EN 18 6. TPN1.1E LA

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
6.6 Serial Number Definition
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 M, 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 CVI (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
2011-Jan-21
Alignments
Finding.
, 50/60 Hz  3 Hz.
AC
< 20 pF.
i
Figure 6-1.
18860_204_100507.eps
100806
Process
1. Press the following key sequence on the remote control
transmitter: "0 6 2 5 9 6 INFO", 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 :
Auto Color : Go
ADC Offset : R xxx
ADC Gain : R xxx
Color Temp : Cool
Scaler Offset : R 128
Scaler Gain : R xxx
Burn in : Off
EEPROM Init : Go
...
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
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.
Input requirements:
Flat 80 (Full White Pattern, Gray Level = 80%).
Input Injection Point:
YPbPr input (EXT 2).
Note: The test pattern must always keep same, as well as
pattern generation and timing, to avoid "Dynamic Contrast" and
"Dynamic Backlight" generating unknown conditions. These
parameters are located in the Digital Crystal Clear function of
user menu.
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 = 128.
• 19" panel: > 240 cd/m
• 22" panel: > 240 cd/m
• 26" panel: > 320 cd/m
Adjusting "Scaler Gain" in factory mode. The R/G/B gain value
should be below 128 to avoid saturation at the 11-step grey
pattern.
This group setting of color temp. will be applied automatically in
TV / VGA / HDMI / AV source.
Figure 6-2.
EXT2 (TV,EXT1,EXT2,VGA,...)
G xxx B xxx
G xxx B xxx
G 128 B 128
G xxx B xxx
18860_205_100507.eps
100601
Figure 6-1.
Figure 6-2.
2
.
2
.
2
.