T - Con (Tft Drive) Pwb Checks - LG 42LG70 Training Manual

T - CON (TFT Drive) PWB Checks
T - CON (TFT Drive) PWB Checks
T-CON PWB
F1
CN1
Check the Regulator
US1 for Correct Voltage
Check Fuse
F1 for 12V
0V
3.2V
Use LD1 to determine if
The boot up sequence of
LD1
The T-CON is OK.
This LED will turn bright Blue
Shortly after power is applied
then go out shortly after
backlights illuminate if all is OK.
Power Off Power 1
Anode 0V Anode 11.6V
Cathode 0V Cathode 0V
LED OFF LED ON
Spring 2009
47
US1
1.8V
st
On Power On
Anode 11.6V
Cathode 9.5V
LED OFF
LCD DV 42LG70