T-Con Voltage Checks - LG 42LH50 Training Manual

T - CON (TFT Drive) PWB Checks
T - CON (TFT Drive) PWB Checks
LD1
Anode Cathode
U11 for Correct Voltage
0V
3.3V
Use LD1 to determine if the boot up sequence of the T-CON is OK.
This LED will turn bright Blue shortly after power is applied then will
go out in about 30 seconds. This assist the backlights in firing.
Power Off
Anode 0V
Cathode 0V
LED OFF
Check the Regulator
1.8V
Power 1 On
st
Anode 3.3V Anode 3.3V
Cathode 0.7V Cathode 1.4V
LED ON
F1
CN1
2009 FALL LCD DV
43
Power On
LED OFF
T-CON PWB
Check Fuse
F1 for 12V
From Pins
48~51
42LH50