LG 50PG70FD-AB (CHASSIS:PA81C) Service Manual ▷ View online
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9. Adjustment of White Balance
Caution: Press the POWER ON KEY on R/C before W/B
adjustment.
Before adjusting White-Balance, the AV ADC should be done.
If ADC status were “NG”, Need to ADC adjustment.
adjustment.
Before adjusting White-Balance, the AV ADC should be done.
If ADC status were “NG”, Need to ADC adjustment.
9-1. Required Equipment
(1) Color Analyzer (CS-1000, CA-100+(CH.10), CA-210
(CH.10) )
[
Please adjust CA-100+ / CA-210 by CS-1000 before
measuring
—> You should use Channel 10 which is Matrix
compensated(White, Red, Green, Blue revised) by CS-
1000 and adjust in accordance with White balance
adjustment coordinate.
1000 and adjust in accordance with White balance
adjustment coordinate.
O
Color temperature standards according to CSM and Module
O
Change target luminance and range of the Auto adjustment
W/B equipment.
O
White balance adjustment coordinate and color temperature.
[
PC(for communication through RS-232C) -> UART Baud
rate : 115200 bps
9-2. Connection 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.
9-3. Auto-Control Interface and Directions
(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.
(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.
O
Auto adjustment Map(RS-232C)
65
20
Range
Target luminance
0.276
0.283
0.000
0.276±0.002
0.283±0.002
0.000
0.276±0.002
0.283±0.002
0.000
X
y
uv
Cool
CS-1000
CA-100+(CH.10) CA-210(CH.10)
0.285
0.293
0.000
0.285±0.002
0.293±0.002
0.000
0.285±0.002
0.293±0.002
0.000
X
y
uv
Medium
CS-1000
CA-100+(CH.10) CA-210(CH.10)
0.313
0.329
0.003
0.313±0.002
0.329±0.002
0.003
0.313±0.002
0.329±0.002
0.003
X
y
uv
Warm
CS-1000
CA-100+(CH.10) CA-210(CH.10)
Full White Pattern
RS-232C Communication
CA-210
Color
ANALYZER
TYPE : CA-210
(Fig. 6) Connecting picture(On Automatic Control)
9-4. Manual White Balance
(1) Zero Calibrate CA-100+ / CA-210, and when controlling,
stick the sensor to the center of PDP module surface.
(2) Press the ADJ KEY on R/C and enter EZ ADJUST
Select “2. White Balance” and press
G
(VOL +)
Set test-pattern on and display inside pattern.
(3) Control is carried out on three color temperatures, COOL,
MEDIUM,WARM.
(Control is carried out thress times)
(Control is carried out thress times)
<Temperature : COOL>
- R-Cut / G-Cut / B-Cut is set to 64
- Control R-Gain and G-Gain.
- Each Gain is limited to 192.
- Control R-Gain and G-Gain.
- Each Gain is limited to 192.
<Temperature : MEDIUM>
- R-Cut / G-Cut / B-Cut is set to 64
- Control R-Gain and G-Gain.
- Each Gain is limited to 192.
- Control R-Gain and G-Gain.
- Each Gain is limited to 192.
<Temperature : WARM>
- R-Cut / G-Cut / B-Cut is set to 64
- Control G-Gain and B-Gain.
- Each Gain is limited to 192.
- Control G-Gain and B-Gain.
- Each Gain is limited to 192.
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TROUBLE SHOOTING GUIDE
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