LG 50PQ30 Training Manual page 129

Side Key Assembly
Side Key Assembly
Pin
P101
Diode Mode Readings taken with all connectors Disconnected. Black lead on Gnd. DVM in Diode Mode.
STBY 1
Main Power
Switch Out
STBY 2
Main Power
Switch In
P101 Resistance Measurements with Key pressed.
Pin 4 measured
KEY
CH (Up)
CH (Dn)
Input
P101 Voltage Measurements with Key pressed.
Pin 4 measured
KEY
CH (Up)
CH (Dn)
Input
P101 Connector "Side Key" to "IR/LED Control Board" J2 (No Key Pressed)
Pin LABEL
*1 Gnd
2 PWR SW
3 KEY 2
4 KEY 1
from Pin 1
6K Ohms
9K Ohms
3.5K Ohms
from Pin 1
0.19V
1.57V
0.88V
*STBY1 *STBY2
Gnd Gnd
4.38V Gnd
0V 0V
0V 0V
129
Pin 3 measured
KEY
from Pin 1
Volume (+) 3.54K Ohms
Volume (-) 0.62K Ohms
Enter 22K Ohms
Menu 9K Ohms
Pin 3 measured
KEY
from Pin 1
Volume (+) 0.86V
Volume (-) 0.19V
Enter
Menu 1.56V
Run Diode Mode
Gnd *Open
Gnd Open
3.3V Open
3.3V Open
November 2009 50PQ30 Plasma
2.2V
* This pin is open
in reference to
Chassis Ground.
* Use this
pin for all
readings.