LG 42LV5500 - 45 V Supply Backlight Driver Section of the SMPS

45V Supply Backlight Driver Section of the SMPS
C256C257
The Power Su
pp
l
y
for the Backli
g
hts
pp y g
Can be checked at the (+) side of C256 or
C257 or the Cathode of D253.
Note: When the PWR ON command
45V
Note:
When
the
PWR
_
ON
command
Arrives, this voltage will read 36V.
When the DRV_ON command arrives
This voltage will rise to 65V the fall quickly
45V
45V
D253
Down to 45V.
Location: Top Center of the SMPS
May 2011 LCD TV 42LV5500
48