LG 50PC1D Series, Service Manual

Page: 15 / 58

- 15 -
W Auto adjustment Map(RS-232C)
9-3. Adjustment of White Balance
(For Manual adjustment)
O
Operate the zero-calibration of the CA-100, then stick
sensor to PDP module surface when you adjust.
O For manual adjustment, it is also possible by the following
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.9, Supply 216Level (85 IRE) full screen
pattern to Video input.
(Input 50Hz, 42PC1DV : AV3/AV4 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
D
/
E
(CH +/-) key
on R/C.
7) Adjust Only High Light with R Gain/ B Gain using F / G
(VOL+/-) key on R/C.
8) Adjust it until color coordination becomes as below.
(Initially, R/G/B gain and R/G/B offset values are fixed as
below
Red Gain : 82, Green Gain : 80, Blue Gain : 86
Red Offset : 7F, Green Offset : 7E, Blue Offset : 82)
[PD61A]-VGA 42”, XGA 42”, 50” Module
Brightness :
High Light : 60 ± 20cd/m2
Color-Coordinate : High Light : X : 0.285 ± 0.003
Y : 0.290 ± 0.003
Color Temperature : 9,300°K ± 500°K
9) When adjustment is completed, Exit adjustment mode using
EXIT key on R/C.
10. Auto Component Color Balance
10-1. Requirement
- It is very import to use correct adjustment pattern like Fig.10.
V
Within the pattern, color sequence should be aligned
: W-Y-C-G-M-R-BLUE-BLACK.
(If color sequence is reversed(Black -> ... > White), reverse
the pattern with REV key, when using Master pattern
generator like MSPG-925)
V
If Minimum Black Level and/or Maximum White Level is not
correct, select 100% Color Bar Pattern.
10-2. Required Test Equipment
1) Remote controller for adjustment.
2) 802F Pattern Generator.
(Which has 720p Ypbpr output with Standard(0.7Vpp)
Vertical 100% Color Bar Pattern as Fig.10)
10-3. Method of auto component color balance
1) Input the Component 720p 100% Color Bar signal into
Component1 or Component2.
2) Set the PSM to Standard mode in Picture menu.
3) Press INSTART key on R/C for adjustment.
4) Press the
G
(Vol. +) key operate to set, then it becomes
automatically.
5) Auto-RGB OK means complete adjustment.
11. Auto RGB Color Balance
11-1. Requirement
- It is very import to use correct adjustment pattern like fig.11
V
Within the pattern, color sequence should be aligned
: W-Y-C-G-M-R-BLUE-BLACK.
(If color sequence is reversed(Black -> ... > White), reverse
the pattern with REV key, when using Master pattern
generator like MSPG-925)
V
If Minimum Black Level and/or Maximum White Level is not
correct, Do select 100% Color Bar Pattern.
11-2. Required Test Equipment
1) Remote controller for adjustment.
2) 802F Pattern Generator, Master(MSPG-925FA), etc.
(Which has XGA 60Hz PC Format output with standard
(0.7Vpp) 100% Color Bar Pattern as Fig.11)
(Fig. 10) Auto Component Color Balance Test Pattern
(Fig. 9) Pattern for Adjustment of White Balance
216 Level (85 IRE) 216 Level (85 IRE)
Type
Baud Rate
115200
Index
R Gain
G Gain
B Gain
R Offset
G Offset
B Offset
Data bit
8
Cmd1 Cmd2
j a
j b
j c
j d
j e
j f
Stop bit
1
Parity
NONE
PD61A/C
Protocol
Setting
Data Min Value
00(00)
00(00)
00(00)
00(00)
00(00)
00(00)
Max Value
255(FF)
255(FF)
255(FF)
255(FF)
255(FF)
255(FF)