Philips 46inch LCD TVchassis PL13.14 - Page 39

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4. LED Backlight Drive Block Diagram
IC1101 (LED BACKLIGHT DRIVER)
OVP
DRIVE Q1101
CONTROL LOGIC
1
13
5 6 7
12
DRIVE
VREG
FAIL DETECT
11 17 15
VLED11 ILED12
Q1102
POWER SUPPLY CBA
LCD PANEL ASSEMBLY
PROTECT3
BACKLIGHT-ADJ BACKLIGHT-SW
TO SYSTEM CONTROL BLOCK DIAGRAM
VIN
IC1201 (LED BACKLIGHT DRIVER)
OVP
CN1001
DRIVE
Q1201
CONTROL LOGIC
1
13
5 6 7
12
DRIVE
VREG
FAIL DETECT
11 17 15
VLED23 ILED24
Q1202
IC1301 (LED BACKLIGHT DRIVER)
OVP
DRIVE
Q1301
CONTROL LOGIC
1
13
5 6 7
12
DRIVE
VREG
FAIL DETECT
11 17 15
VLED35 ILED36
Q1302
PL13.14BLBD