LG 50PS80 Training Manual page 135

Side Key Assembly
Side Key Assembly
P1 Resistance Measurements with Key pressed.
KEY Pin 1 measured
PRESSED from Gnd (KEY 1)
CH (Up) 0.61K Ohms
CH (Dn)
Input 3.66K Ohms
P1 Voltage Measurements with Key pressed.
KEY Pin 1 measured
PRESSED from Gnd (KEY 1)
CH (Up)
CH (Dn)
Input
Diode Mode Readings taken with all connectors Disconnected. Black lead on Gnd. DVM in Diode Mode.
P1 Connector "Side Key" to "IR/LED Control PWB" J2 (No Key Pressed)
STBY1
Pin
PWR SW
1 KEY 1
Out
2 KEY 2
STBY2
3 PWR SW
PWR SW
4
In
9K Ohms
0.19V
1.57V
0.88V
*STBY1
0V
0V
4.38V
Gnd Gnd
135
Pin 2 measured
KEY
from Gnd (KEY 2)
Volume (+) 3.6K Ohms
Volume (-) 0.62K Ohms
Enter 22K Ohms
Menu 9K Ohms
Pin 2 measured
KEY
from Gnd (KEY 2)
Volume (+) 0.86V
Volume (-) 0.19V
Enter 2.2V
Menu 1.56V
*STBY2 Run
3.3V 3.3V
3.3V 3.3V
Gnd Gnd
Gnd Gnd
August 2009 Plasma 50PS80
Diode Mode
Open
Open
Open
Open