LG 47LH41 Service Manual page 17

• RS-232C Command used during auto-adjustment
CMD ID DATA
wb 00 00 Begin White Balance adj.
wb 00 ff End White Balance adj.
(internal pattern disappears)
Ex) wb 00 00 -> Begin white balance auto-adj.
wb 00 10 -> Gain adj.
ja 00 ff -> Adj. data
jb 00 c0
...
...
wb 00 1f -> Gain adj. complete
*(wb 00 20(Start), wb 00 2f(End)) -> Off-set adj.
wb 00 ff -> End white balance auto-adj.
5.2.5 Adjustment method
5.2.5.1 Auto adjustment method
1) Set TV in adj. mode using POWER On Key
2) Zero calibrate probe then place it on the center of the
Display
3) Connect Cable(RS-232C)
4) Select mode in adj. Program and begin adj.
5) When adj. is complete (OK Sign), check adj. status per
mode (Warm, Medium, Cool)
6) Remove probe and RS-232C cable to complete adj.
• adj. must begin w/ command "Wb 00 00", and end w/"wb
00 ff" and adjustment offset if needed.
5.2.5.2 Manual adj. method
1) Set TV in adj. mode using POWER On Key
2) Press ADJ key Æ EZ adjust using adj. R/C
3) Using CH + / - KEY, select 7.TEST PATTERN then press
Enter to place inHEAT RUN mode and wait for 5
minutes.
4) Zero calibrate the probe of Color Analyzer, then place it
on the center of LCD module within 10 cm of the surface.
5) Press ADJ key Æ 6. White-Balance then press the cursor
to the right (KEY
(When is pressed Full White internal pattern will be
displayed)
6) One of R Gain / G Gain / B Gain should be fixed at 192,
and the rest will be lowered to meet the desired value.
7) Adjustment is performed in COOL, MEDIUM, WARM 3
modes of color temperature
• If internal pattern is not available, use RF input(Full white
216 gray) In EZ Adjustment menu 6.White Balance, you
can select one of 2 options: Test pattern ON, Test pattern
OFF. Default is "ON" By selecting "OFF", you can adjust
using RF signal.
• Adjustment condition and cautionary items
1) Lighting condition in surrounding area Surrounding
lighting should be lower than 10 lux.
Try to isolate adj. area into dark surrounding.
2) Probe location
- Color Analyzer (CA-210) probe should be within 10cm
and perpendicular of the module surface (80°~ 100°)
- B/L on should be checked using no signal or Full white
Pattern
Copyright 2009 LG Electronics. Inc. All right reserved.
C
Only for training and service purposes
Explanation
)
5.2.6 Reference
(White Balance adj. coordinate and color temperature)
• Luminance: Full white 216 Gray
• Standard color coordinate and temperature using CS-1000
Coordinate
Mode
x
Cool 0.276
Medium 0.285
Warm 0.313
• 37/42/47LH40-UA (N-America)
Standard color coordinate and temperature using CA-210(CH 09)
Coordinate
Mode
x
Cool 0.276±0.002
Medium 0.285±0.002
Warm 0.313±0.002
5.3 Manual V-Com adjustment Method
* V-Com needs to be adjusted.(Default value is "450")
1) Set TV in adj. mode using POWER On Key
2) Press ADJ key -> EZ adjust using adj. R/C
3) Using CH + / - KEY, select "10.V-Com"
4) Store the optimized default value "440" if there is not flicker
on the picture.
5) But is there flicker on the picture, Adjust V-Com using VOL
+ / - KEY
6) Stop adjusting V-Com if green pattern doesn't show flicker.
and then stored current value and exit.
EZ ADJUST
0. Tool Option1
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Country Group
5. ADC Calibration
6. White Balance
7. Test pattern
8. EDID D/L
9. Sub B/C
10. V-Com
11. P-Gamma
5.4 Option selection per country
5.4.1 Overview
• Option selection is only done for models in Non-USA North
America due to rating
• Applied model: LA92G Chassis applied None USA
Model(Canada, Mexico)
5.4.2 Method
1) Press ADJ key on the Adjustment R/C, then select Country
Group Menu
2) Depending on destination, select KR or US, then on the
lower option, select US, CA, MX. Selection is done using
+, - KEY
- 17 -
Temp
y
0.283 11000K
0.293 9300K
0.329 6500K
Temp
y
0.283±0.002 11000K
0.293±0.002 9300K
0.329±0.002 6500K
V-Com
445 V-COM
V-COM
Store
LGE Internal Use Only
uv∆
0.0000
0.0000
0.0000
uv∆
0.0000
0.0000
0.0000
V-Com
443
Store