LG 50PK950 Training Manual page 111

Control Board LVDS P31 Signals
Control Board LVDS P31 Signals
LVDS Cable P31 on Control board shown.
Press two outside tabs inward to release.
Pins are close together.
Video Signals from the Main Board to the Control Board are referred
to as Low Voltage Differential Signals or LVDS. The video is
delivered in 24 bit LVDS format. Their presence can be confirmed
with the Oscilloscope by monitoring the LVDS signals with SMPTE
Color Bar input. Loss of these Signals would confirm the failure is on
the Main Board or the LVDS Cable itself.
LVDS
Example of Normal Signals measured at 1V p/p at 10µSec
Pins 12~17, 19~20, 22~33, 35~36, 38~43.
Pins 19~20 and 35~36 are clock signals for the data.
Example of LVDS Video Signal
111 October 2010 50PK950 Plasma