Read LG 42LT75 / 42LT76 (CHASSIS:LD74A) Service Manual online
- 13 -
6.3 Adjustment of RGB
√ Required Equipments
• Remote controller for adjustment
• MSPG-925FS Pattern Generator (Which has XGA
• MSPG-925FS Pattern Generator (Which has XGA
[1024x768] 60Hz 8 color bar 100% pattern shown in Fig. 3 ).
6.3.1 Method of Auto RGB Color Balance
1) Input the PC 1024x768 @ 60Hz 7 Color Bar (MSPG-
925FS model:3, pattern:65) signal into RGB. (using D-sub
to D-sub cable)
to D-sub cable)
2) Set the PSM to Dynamic mode in Picture menu.
3) Press the IN-START key on R/C for adjustment.
3) Press the IN-START key on R/C for adjustment.
[Fig.5 Color Bar Signal]
4) Press the
(Vol.+) key operate To set , then it becomes
automatically.
[Fig.6 Color Bar Signal]
5) Auto-RGB OK means adjustment is completed.
Before adjusting White-balance , the AV ADC
should be done.
should be done.
7. White Balance
√ Test Equipment
• Color Analyzer (CA-210/CH.9)
=> When you adjust LCD color temperature, on Color
analyzer (CA-210), you should use Channel 9 which is
Matrix compensated (White, Red, Green, Blue revised)
by CS-1000 and adjust in accordance with White
balance adjustment coordinate which is specified on
the next..
Matrix compensated (White, Red, Green, Blue revised)
by CS-1000 and adjust in accordance with White
balance adjustment coordinate which is specified on
the next..
*Color temperature standards according to CSM and Module
* White balance adjustment coordinate and color temperature.
• PC (for communication through RS-232C) => UART Baud
rate : 115200 bps
• Luminance Y AV : upper 200 cd/m
2
(Typ : 350 cd/m
2
) =>
Applying to Cool mode
* Connecting picture of the measuring instrument (On Automatic
control)
Inside PATTERN is used when W/B is controlled. Connect to
auto controller or push control R/C IN-START => Enter the
mode of White-Balance, the pattern will come out.
auto controller or push control R/C IN-START => Enter the
mode of White-Balance, the pattern will come out.
• Measurement color analyzer : CS1000 or CA210(CH.9)
[Fig.7Connecting Picture (on Automatic Control) ]
* Auto-control interface and directions
1) Adjust in the place where the influx of light like floodlight
1) Adjust in the place where the influx of light like floodlight
around is blocked. (illumination is less than 10ux).
2) In case of PDP: Measure and adjust after sticking the
Color Analyzer (CA-100+, CA210 ) to the side of the
module.
module.
In case of LCD: Adhere closely the Color Analyzer (
CA210 ) to the module less than 10cm distance, keep it
with the surface of the Module and Color Analyzer’s
Prove vertically.(80~100°).
CA210 ) to the module less than 10cm distance, keep it
with the surface of the Module and Color Analyzer’s
Prove vertically.(80~100°).
3) Aging time
- After aging start, keep the power on (no suspension of
power supply) and heat-run over 15 minutes.
- In case of PDP, keep white pattern using inside pattern.
- In case of LCD, using ‘no signal’ or ‘full white pattern’ or
- In case of LCD, using ‘no signal’ or ‘full white pattern’ or
the others, check the back light on.
CSM
LCD
Cool
11,000k
Medium
9,300k
Warm
6,500k
Cool
CS-1000
CA-210(CH 9)
x
0.276
0.276±0.002
y
0.283
0.283±0.002
uv
0.000
0.000
Medium
CS-1000
CA-210(CH 9)
x
0.285
0.285±0.002
y
0.293
0.293±0.002
uv
0.000
0.000
Warm
CS-1000
CA-210(CH 9)
x
0.313
0.313±0.002
y
0.329
0.329±0.002
uv
0.004
0.004
Click on the first or last page to see other 42LT75 / 42LT76 (CHASSIS:LD74A) service manuals if exist.