LG 42LV5500 Training Presentation page 48

45V Supply Backlight Driver Section of the SMPS
C257 C256
The Power Supply for the Backlights pp y g
Can be checked at the (+) side of C256 or
C257 or the Cathode of D253.
Note: When the PWR ON command Note: When the PWR_ON command
Arrives, this voltage will read 36V.
When the DRV_ON command arrives
45V
This voltage will rise to 65V the fall quickly
Down to 45V.
45V
D253
45V
Location: Top Center of the SMPS
May 201 1 LCD TV 42LV5500
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