Philips 43PFL4902/F7 - Page 42

9-4
4. LED Backlight Drive Block Diagram
VLED11
LCD PANEL ASSEMBLY
CN1001
ILED12 VLED23
ILED24
POWER SUPPLY CBA
IC1001 (LED BACKLIGHT DRIVER)
DRIVE
LOGIC
OSC
PWM
FEEDBACKPROTECT
4 5 6 7
12
2
10 18 17 14
PROTECT3
N1 N2
STB
BACKLIGHT-ADJ BACKLIGHT-SW
TO SYSTEM CONTROL BLOCK DIAGRAM
TO POWER SUPPLY BLOCK DIAGRAM
VLED2 VLED1
P-ON+20V
PL17.06BLBD