LG 32LG40 Training Manual page 56

CIRCUIT DeSCRIPTIONS
Test the waveforms while using a SMTE color bar signal as the input.
MAIN BOARD lvDS P900 ChECk
4
To confirm that the Main board is outputting Picture Content signals, check P900 (LVDS)
cable for output. Check 1 1-22 and 27-38. This signals vary, but looking for signals like
the ones shown below on any of these pins will confirm the output of video content. This
2
signal is using a standard SMTE Color Bar output from a generator as the input source.
Below is just a sample of two pins on the LVDS. There are 24 pins carrying video.
L
G
6
0
56 56
Fall 2008 LCD Training Fall 2008 LCD Training
TDVF-H051F
EBL37676801
NC_1
Not Used 1
RF-AGC
Not Used
2
+B (5V)
3
SIF Signal
VTU
Not Used 4
NC_2
Not Used
5
GND
6
SDA
7
SCL
8
AS
Not Used 9
DIGITAL_IF1
10
DIGITAL_IF2
11
IC_AGC
12
AUDIO_OUT
Not Used 13
Video Signal
SIF
14
IF_AS
Not Used
15
VIDEO_OUT
16
17
Shield
Pin 11
P900
Location
MAIN PWB
Pin 16
Pin 14
850mVp/p 20nSec rate
Pin 16
1Vp/p 20uSec rate