LG 42PX4DV, Service Manual

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6.4. Sequence of Adjustment
(1) DDC data of Analog-RGB
1) Init the data
2) Load the EDID data.(Open File)
[Analog(RGB) : H2_VGA_XGA_RGB(2B52.ANA]
[Digital(HDMI) : H2_VGA_HDMI(CB50).DVI] (VGa only)
[Digital(HDMI) : H2_VGA_HDMI(0F0F).DVI] (XGA only)
3) Set the S/W as below.
4) Push the “Write Data & Verify”button. And confirm “Yes”.
5) If the writing is finished, you will see the “OK” message.
7. Auto AV(CVBS) Color Balance
7-1. Requirement
V
This AV color balance adjustment should be performed
befor white Balance Adjustment
V
It is very import to use adjustment pattern like Fig.7
1) Within the pattern, color sequence should be aligned
: W-Y-C-G-M-R-BLUE-BLACK
(If color seqence is reversed (Black -> ... -> White),
reverse the pattern with REV key, when using Master
patern generator like MSPG-925)
2) If minimum Black level and/or maximum White level is
not correct, select 100% color bar pattern.
7-2. 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 Fig7)
7-3. Method of Auto AV(CVBS) Color Balance
1) Input the PAL Composite Video (Fig6. 100% Color Bar
Pattern) into video input.
(RCA : AV1, SCART : AV3 Input, PAL : 50Hz, NTSC : 60Hz)
2) Set the PSM to Standard mode in Picture menu.
3) Press INSTAR key on R/C for adjustment.
4) Press the G (Vol. +) key operate to set, then it becomes
automatically.
5) Auto-RGB OK means completed adjustment.
8. Adjustment of White Balance
8-1. 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
8-2. Connecting diagram of equipment for
measuring (For Auto Adjustment)
W
Auto adjustment Map(RS-232C)
(Fig. 7) Auto AV(CVBS) Color Balance Test Pattern
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
DF-054A : 42PX4DV
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)
(Fig. 8) Connection Diagram of Auto W/B Adjustment
M SPG-2 1 0 0 /
M STG- 5 2 0 0
216 Level (85 IRE)
COLOR
ANALYZER
TYPE ; CA-100
CVBS
signal
input
RS-232C Serial Communication