Control Lvds Signals - LG 50PG20 Training Manual

Control LVDS Signals

Control LVDS Signals
P302 on Main Board
Connector P302 Configuration
- indicates signal pins.
1
2
4 3
6 5
8 7
9
10
12 11
14 13
15
16
18 17
20 19
22 21
LVDS
Video Signals from the Main Board to the Control Board are referred to as Low
Voltage Differential Signals or LVDS. Their presence can be confirmed with the
Oscilloscope by monitoring the LVDS signals with no input signal selected while
pressing the Menu Button "on" and "off" with the Remote Control or Keypad.
Loss of these Signals would confirm the failure is on the Main Board!
Menu (OSD) Off
Example of Normal Signals measured at 200mv/cm at 5µs/cm.
Use "Only" Component Input. Select by
remote by guess since there's no video.
Toggle between Menu and Menu Off to
LVDS Cable
P121 on Control
PWB shown.
Press two outside
tabs inward to
release.
Press
Inward
Menu (OSD) ON
Plasma Spring 2009
92
see difference in waveform.
Press
Inward
50PG20