LG 42PX4R Service Manual page 12

6. Auto AV(CVBS) Color Balance
6-1. Required
- This AV color balance adjustment should be performed befor
white Balance Adjustment
6-2. Required Equipment
1) Remote controller for adjustment
2) AV Pattern Generator
: 802F Pattern Generator, Master(MSPG-925FA), etc
(Which has PAL Composite Video format output with
standard(1.0 Vpp) Vertical 100% Color Bar Pattern as Fig6)
6-3. Method of Auto Color Balance
1) Input the PAL Composite Video (Fig6. 100% Color Bar
Pattern) into video input.
(42PX4RV-TA : AV1/AV2 Input 50Hz,
42PX4RV-ZA : AV4/AV5 Input)
2) Set the PSM to Standard mode in Picture menu.
3) Press INSTAR key on R/C for adjustment.
4) Press the (Vol. +) key operate to set, then it becomes
G
automatically.
5) Auto-RGB OK means completed adjustment.
(Fig. 6) Auto AV(CVBS) Color Balance Test Pattern
7. Adjustment of White Balance
7-1. Required Equipment
1) Remote controller for adjustment
2) Color Analyzer (CA-100 or same product)
3) Auto W/B adjustment instrument(only for auto adjustment)
4) AV Pattern Generator
7-2. Connecting diagram of equipment for
measuring (For Auto Adjustment)
(Fig. 7) Connection Diagram of Auto W/B adjustment
Auto adjustment Map(RS-232C)
W
Type
Baud Rate
115200
Index Cmd1 Cmd2
R Gain
G Gain
Protocol
B Gain
Setting
R Offset
G Offset
B Offset
7-3. Adjustment of White Balance
Operate the zero-calibration of the CA-100, then stick
O
sensor to PDP module surface when you adjust.
For manual adjustment, it is also possible by the following
O
sequence.
1) Select white pattern of heat-run mode by pressing power
on key on remote control for adjustment then operate heat
run more than 15 minutes.
2) As below Fig.7-1, Supply 216Level (85 IRE) full screen
pattern to Video input.
(42PX4RV-TA : AV1/AV2 INPUT 50Hz,
42PX4RV-ZA : AV4/AV5 INPUT)
3) Press the TV/AV KEY on R/C for converting input mode.
4) Set the PSM to Standard mode in Picture menu.
5) Enter the White Balance adjustment mode by pressing the
INSTART key twice(White Balance) on R/C.
6) Stick sensor to center of the screen and select each items
(Red/Green/Blue Gain and offset) using
on R/C.
7) Adjust Only High Light with R Gain/ B Gain using
(VOL+/-) key on R/C.
8) Adjust it until color coordination becomes as below.
(High Light G Gain : 7A // Low Light R Offset : 7F, G Offset
7E, B Offset 80 is Fixed)
[MF-056A : 42PX4RV-TA/ZA] - VGA 42"
Bright :
Color-Coordinate :
Color Temperature : 9,300°K ± 500°K
(Fig. 7-1) Pattern for Adjustment of White Balance
9) When adjustment is completed, Exit adjustment mode
using EXIT key on R/C
- 12 -
MF-056A : RT-42PX40/ RZ-42PX40
Data bit Stop bit
8 1
Data Min Value
j a
00(00)
j b
00(00)
j c
00(00)
j d
00(00)
j e
00(00)
j f
00(00)
D
High Light : 80 ± 20cd
High Light : X : 0.285 ± 0.003
Y : 0.295 ± 0.003
High Light adj ust
L o w L i g ht adj ust
Parity
NONE
Max Value
255(FF)
255(FF)
255(FF)
255(FF)
255(FF)
255(FF)
/ (CH +/-) key
E
/
F G
COL OR
A N A L YZER
T YPE; CA-1 0 0
CV B S si gnal i npu
PDP M ON I T OR
Wi n