LG 50PS80 Training Manual page 132

Front Control PWB Connector P1 Voltage and Pin Identification
Front Control PWB Connector P1 Voltage and Pin Identification
For Voltages when
each Key is
pressed, see the
Key PWB section.
* Pin 5 (Power Key)
This pin is 0V when
the button is locked
"On" (In) and 5V
when locked "Off"
(Out).
7 & 8
Intelligent
Sensor
Stand
By 5V
This TV has a center
LED which also turns
on then goes off
after turn on.
Diode Mode Readings taken with all connectors Disconnected. Black lead on Gnd. DVM in Diode Mode.
P1 CONNECTOR " Front Control PWB" to P1101 "Main PWB"
Pin Label
1 IR
2 Gnd
3 Key1
4 Key2
*5 Key On
6 Gnd
7 EYEQ-SCL
8 EYEQ-SDA
9 Gnd
10 STBY 5V
11 +5V
12 Gnd
13 LED R
14 LED W
15 LED Cent
STBY Run
4V 3.98V
Gnd Gnd
3.3V 3.3V
3.3V 3.3V
0V/4.3V 0V
Gnd Gnd
3V 3.3V
3V 3.3V
Gnd Gnd
5V 5V
0.56V 5V
Gnd Gnd
3.19V 0V
0V *0V
0V *0V
August 2009 Plasma 50PS80
132
Diode Check
2V
Gnd
1.9V
1.9V
Gnd / Open
Gnd
2V
2V
Gnd
1
1.25V
0.6V
Gnd
1.87V
*Green LEDs turn
1.7V
on when TV first
turned on. Next
1.5V
they get brighter,
then they go off.
P1