LG 42PJ350 Training Manual page 91

Control Board LVDS P121 Signals
Control Board LVDS P121 Signals
LVDS Cable P121 on Control board shown.
Press two outside tabs inward to release.
P121
LVDS
LVDS
LVDS Removed
Pins are close together,
Use caution.
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 10 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.
Example of LVDS Video Signal
Example of Normal Signals measured at 1V p/p at 10µSec
Pins 2~5, 7~8, 11~12, 24~25 are LVDS Video Signals.
Pins 9~10 and 22~23 are clock signals for the data.
91 August 2010 42PJ350 Plasma