LG 42PQ20 Training Manual page 85

Control LVDS Signals
Control LVDS Signals
Pin
Connector P1002 Configuration
- indicates signal pins.
2 1
4 3
6 5
8 7
10 9
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
P1002 on Main Board
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 Off
Example of Normal Signals measured at 200mv/cm at 5µs/cm.
85 January 2009 Plasma
LVDS Cable
P121 on Control PWB shown.
Press two outside tabs inward
to release.
Pins are very close together,
Use the Main PWB connector.
Menu ON
42PQ20