LG 47LA6800-CA.AHK (CHASSIS:LC33B) Service Manual ▷ View online
LGE TV Division LG()
Establish : 12.7.6. 39
Reform : 12.10.15 114
Reform : 12.10.15 114
LG 전자
LC33B Product Specification
1) Measure condition
● Test pattern : 100IRE(255Level) pattern of Full window
● Test pattern : 100IRE(255Level) pattern of Full window
● Video menu option condition : Shipment MODE. (In-Stop)
2) Measurement
● Brightness tracking : Change brightness value in video menu.
● Brightness tracking : Change brightness value in video menu.
Check the luminance every 10 point while decrease brightness value 100 to 0.
● Contrast tracking : Change contrast value in video menu.
● Contrast tracking : Change contrast value in video menu.
Check the luminance every 10 point while decrease contrast value 100 to 0.
▣
Static Contrast Ratio for Local Dimming
1) Measure condition
● Test pattern : 50 APL Window Pattern [Left – 100IRE (255Level) of 50% window / Right – 0IRE(0Level) of 50% window]
● Test pattern : 50 APL Window Pattern [Left – 100IRE (255Level) of 50% window / Right – 0IRE(0Level) of 50% window]
● Video menu option condition
- Picture mode Vivid Default , HDMI
Measure Point
LGE TV Division LG()
Establish : 12.7.6. 40
Reform : 12.10.15 114
Reform : 12.10.15 114
LG 전자
LC33B Product Specification
2) Measurement
● Impress specific pattern signal,
● Impress specific pattern signal,
● Measure center brightness degree Lw of left white window, and measure center brightness degree Lb of right black.
● Calculate the following numerical formula.
- Static Contrast Ratio = Lw / Lb
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Contrast ratio measure specification
1) Test display signal : 100%(255Gray)Full White Window signal & all Black Raster signal(0Gray)
2) Dark room measure condition : : Using touch type Color analyzer CA-210 Dark room in the non outside light
3) Bright room measure condition : In bright room of 150Lx illumination in the panel surface, locate a source of light on the above 45˚of the panel surface.
4) Measure method
● In standard test condition, impress 100%(255Gray)Full White Window Pattern signal .
measure center peak brightness degree LV of white window
● Impress black Raster signal as contrast ratio measurement signal.
Measure black brightness degree Lb of central
Calculate the following numerical formula
Contrast ratio = LV / Lb
If it does not use Prior measurement, use generally simple test measurement.
Signal
Picture Mode Dynamic Contrast Dynamic Color
Clear White
Black Level
RF
NTSC-M
Vivid
High
High
High
Low
PAL
Vivid
High
High
High
Auto
AV
NTSC-J
Vivid
High
High
High
High
PAL
Vivid
High
High
High
Auto
Component
1080p
Vivid
High
High
High
High
RGB
1024x768
Vivid
Off deactivated
NA
LGE TV Division LG()
Establish : 12.7.6. 41
Reform : 12.10.15 114
Reform : 12.10.15 114
LG 전자
LC33B Product Specification
HDMI
DTV 1080p
Vivid
High
High
High
Low
▣
Luminance uniformity measure specification
1) Impress 100 % (255Gray Level) full white pattern at the same peak brightness measurement.
2) Measure brightness L0~L8 in each 9 points P0~P8
- Luminance uniformity(%) = Minimum(L1, L2, L3, …, L8) / Maximum(L1, L2, L3, …, L8) * 100
- Average Luminance = Sum of Luminance(L1, L2, L3, …, L8) / 9
3) Measure average brightness in IOP LED 17 points.
< EDGE LED>
1/9H
P8
P4
P7
P1
P0
P3
P5
P2
P6
1/9V
1/2H
H
1/2V
V
LGE TV Division LG()
Establish : 12.7.6. 42
Reform : 12.10.15 114
Reform : 12.10.15 114
LG 전자
LC33B Product Specification
< IOP LED / ALEF LED >
2 3 4
10 11 12
9 13 1 14
5
15 16 17
8 7 6
10 11 12
9 13 1 14
5
15 16 17
8 7 6
-
Luminance uniformity: Min 77% (Full white (17 point measure))
▣
Response Time measure specification
1) Measuring instrument : PR-880.
2) Measuring Mode : Picture mode Vivid Default
3) Response time is the time required for the display to transit from G(N) to G(M) (Rise Time, TrR)
and from G(M) to G(N) (Decay Time, TrD). For additional information see the FIG. 3. (N<M)
※ G to G Spec stands for average value of all measured points.
4) Response time is defined as the following figure and shall be measured by switching the input signal for “Gray(N)” and “Gray(M)”
2) Measuring Mode : Picture mode Vivid Default
3) Response time is the time required for the display to transit from G(N) to G(M) (Rise Time, TrR)
and from G(M) to G(N) (Decay Time, TrD). For additional information see the FIG. 3. (N<M)
※ G to G Spec stands for average value of all measured points.
4) Response time is defined as the following figure and shall be measured by switching the input signal for “Gray(N)” and “Gray(M)”
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