LG 32LG40 Training Manual page 52

CIRCUIT DeSCRIPTIONS
lCD DRIvER (T-CON) TESTS
Check the regulator US1
4
2
L
G
6
0
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Fall 2008 LCD Training Fall 2008 LCD Training
for correct voltage.
Check Fuse F1 for 12V.
LCD Driver LED Status
Power Off
Anode 0V
Cathode 0V
LED OFF
US1
0V
1.8V
3.2V
F1
CN1
Power 1st On Power On
Anode 11.6V Anode 11.6V
Cathode 0V Cathode 9.5V
LED ON LED OFF
LD1
Use LD1 to determine if The
boot up sequence of The
T-CON is OK. If all is OK, this
LED will turn bright blue
shortly after power is
applied then go out shortly
after backlights illuminate .