LG 50PQ30 Training Manual page 124

Ft Power LED (IR) Board Component Checks
Ft Power LED (IR) Board Component Checks
Place Voltmeter in
Diode Mode.
ZN1 ZN3
0.653V 0.7V
Leads opposite = Open
Blue
LED
ZN2
Place Voltmeter in Diode Mode,
0.687V
Red on bottom of either LED black lead
Front View
Red
LED
Front Power
LEDs
on top and they light.
Back View
124 November 2009 50PQ30 Plasma
Intelligent
IR
Sensor
Sensor
0.652V Gnd 0.652V
Place Voltmeter in
Diode Mode.
Black on Gnd.