LG 47LB2RF, Service Manual

Page: 13 / 42

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- If Minimum Black Level and/or Maximum White
Level is not correct, Do select 100% Color Bar
Pattern.
(Fig. 3)
5.3.1 Method of Auto RGB Color Balance
1) Input the PC 1024x768@60Hz 1/2 Black&White Pattern
(MSPG-925FA model:3, pattern:33) into RGB.
2) Set the PSM to Standard mode in Picture menu.
3) Press the INSTART key on R/C for adjustment.
4) Press the
(Vol. +) key operate To set , then it becomes
automatically.
5) Auto-RGB OK means adjustment is completed.
6. White Balance
=> Caution : Before White-balance, the AV ADC should
be done. (INPUT AV1)
(Notice : Before White-balance, change input mode Move
to AV1 by using the FRONT-AV KEY on Remote
controller.)
=> Caution : - System control RS-232 Host should be "PC" for
adjustment.
- AV ADC(AV1) should be done before White-
balance.
* Test Equipment
Color Analyzer (CA-110)
PC(For communication through RS-232C)=>UART
Baud rate : 115200
Pattern Generator (MSPG-925FA etc.)
*Target Value [ PSM: Standard(ZH/TH), CSM: Normal]
- Normal(9300K±1000K) x:283±0.015, y: 298±0.015
-Luminance(Y) AV : Min 250 Cd/m2 LPL
=> Reference Value(Automatically fixed)
- Cool(11000K±1000K)
- Warm(7200K±1000K)
6.1 Manual white Balance (AV)
1) Execute CA-110 Zero Calibration.
2) Execute the SET Heat Run for 30minutes
3) As below Fig. 4, Supply 216Level (85 IRE) full screen
pattern to Video input.(Input 50Hz)
4) Press the FRONT-AV KEY on R/C for converting input
mode.
5) Set the PSM to Standard mode in Picture menu.
6) Enter the White Balance adjustment mode by pressing the
INSTART key twice(White Balance) on R/C.
7) Stick sensor to center of the screen and select each items
(Red/Green/Blue Gain and Offset) using / (CH+/-) key
on R/C.
8)Adjust Only High Light with R Gain/B Gain using / (VOL
+/-) key on R/C.
9) Adjust it until color coordination becomes as below.
X-axis : 0.283±0.003
Y-axis : 0.298±0.003
(R/G/B gain and R/G/B offset Default values are different in
according to using module )
10) Adjust High light with R/B Gain.
(Fig.4)
6.2 Auto white Balance (AV)
1) LPL Module
White balance ZH(AV3), TH(AV1) MH(VIDEO1)
MSPG925FA 216 Level (85IRE) Model : 202 Model : 201
Full screen pattern • Pal Video • NTSC Video
216 Level(85IRE)
Command1 Command2 Set ID
Data
Min Max
Input Select XB B 00 00h 90h
R-Gain J A 00 00h E0h
G-Gain J B 00 00h E0h
B-Gain J C 00 00h E0h
R-Offset J D 00 00h 90h
G-Offset J E 00 00h 90h
B-Offset J F 00 00h 90h