White Balance - LG 32LB2R Service Manual

(1) Method of Auto RGB Color Balance
1) Input the PC 1024x768 @ 60Hz with 100% color bar
pattern like Fig.2. into RGB.
2) Set the PSM to Standard mode in Picture menu.
3) Press the INSTART key on R/C for adjustment.
G
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. (ZH:AV3, TH:AV1, MH:VIDEO1)
=> After Aging, When the procedure is changed White
balance adjustment, it will be canceled Heat_run mode
auto.
Notice : Before White-balance, change input mode.
Move to AV3(ZH) or AV1(TH) or VIDEO1(MH) by
using the FRONT-AV KEY on Remote controller.
White balance
MSPG925FA 216 Level (85IRE)
Full screen pattern
<Caution>
- System control RS-232 Host should be "PC" for
adjustment.
- AV ADC(ZH: AV3, TH : AV1, MH: VIDEO1) 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)
AV : Min. 200Cd/m2 (AUO)
=> 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.3, Supply 216Level (85 IRE) full screen
pattern to Video input.
32LB2R-ZH, 37LB2R-ZH, 42LB2R-ZH: AV3/AV4 (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
on R/C.
8) Adjust Only High Light with R Gain/B Gain using
+/-) key on R/C.
ZH(AV3), TH(AV1) MH(VIDEO1)
Model : 202 Model : 201
• Pal Video • NTSC Video
D / E (CH+/-) key
F G
/
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.
6.2 Auto white Balance (AV)
1) LPL Module
Input Select
R-Gain
G-Gain
B-Gain
R-Offset
G-Offset
B-Offset
2) AUO Module
Input Select
R-Gain
G-Gain
B-Gain
R-Offset
G-Offset
B-Offset
(VOL
- 13 -
216 Level(85IRE)
<Fig. 3>
Command1 Command2 Set ID
XB B 00
J A 00
J B 00
J C 00
J D 00
J E 00
J F 00
Command1 Command2 Set ID
XB B 00
J A 00
J B 00
J C 00
J D 00
J E 00
J F 00
Data
Min Max
00h 90h
00h E0h
00h E0h
00h E0h
00h 90h
00h 90h
00h 90h
Data
Min Max
00h 90h
00h E0h
00h E0h
00h E0h
00h 90h
00h 90h
00h 90h