47LH90QD (CHASSIS:LT91C) - LG TV Service Manual (repair manual). Page 7

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No Item 

Specification 

Remarks

1 Market 

Taiwan

Digital DVB-T 

UHF 

14-69

2 Broadcasting 

Analog

NTSC-M 

3 

Receiving  

Analog 

Upper Heterodyne

system

Digital COFDM,QAM

4 

Video Input RCA (2EA) 

NTSC

5 

Component Input (2EA)

Y/Cb/Cr 

Y/Pb/Pr

6 RGB 

Input 

RGB-PC

HDMI1-DTV/DVI

PC(HDMI version 1.3) / DTV format, Support HDCP

7

HDMI Input (4EA)

HDMI2-DTV

DTV format, Support HDCP

HDMI3-DTV

DTV format, Support HDCP

HDMI4-DTV

DTV format, Support HDCP

8 

Audio Input (5EA)

RGB/DVI Audio, Component1/2, AV1/2

RGB/DVI Audio : Stereo Phone Jack 

Others : RCA Jack

9 

SDPIF out (1EA)

Optical Audio out

10 

USB (1EA)

USB2.0 

JPEG, MP3, DivX, and SVC (download)

*** LGD module Uniformity Measurement Position*** 

** LED Backlight Contrast Ratio Measurement Condition **

P1

P2

P3

P4

P5

1W/4

2W/4

3W/4

1H/4

2H/4

3H/4

: Measurement position (5 point)

P1 (red point) : Measure the white in a center point of box and the Black in a edge point of screen
P2 (green point) : Measure the white and black near of box The CR of full black and white is 2,000,000:1 and local dimming

measurement that P1 is 10,000: 1 and P2 is 1000:1 in the 16% window

** reference **
The measurements of Local Dimming are doing by this case
Case 1 : P1:10,000: 1 , P2 :1000:1 in 25% window over 100 Blocks
Case 2 : P1:10,000: 1 , P2 :1000:1 in 16% window under 100 Blocks