LG DP471B - B;L Power Circuit Diagram

Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3-47 3-48
14. B/L POWER CIRCUIT DIAGRAM
15u/480mA
33u/600mA
VCOM
50K
50K
Contrl the Backlight Power On/Off
FB_B
OUTB
VCOMDC
POL
VCOM_OP
VCOMDC
VCOM_ADJ
OUTB
OUTA
FB_B
FB_A
BL_PWM
POL8
TFT_CS8
PANEL_VGH
PANEL_VGL
TCON-VCC5
LED+
LED-
VCC_VCOM_OP
LED+
VCC_VCOM_OP
PANEL_VCOM
IO_VCC3
+5V_SYS +5V_SYS
TCON-VCC5
TCON-VCC5
0.1U/25V/0402
C40
TC6
22U/10V/A
1N/50V/0402
C13
C28 0.1U/25V/0402
C32
4.7u/25V/1206
Q37
APM2301A
G
SD
0.1U/25V/0402
C16 R254
10K/F/0402
Q3
APM2300
G
DS
R16 1K/F/0402
L6
15UH/0.88A/D53LC
R8
NC/48K/F/0402
R152
1K/F/0603
R156
39/F/0603
D9
UDZS10B
A K
R172
4.7K/J/0402
U2
NC/TC33X-2-503
1 2
3
R5 169R/J/0603
R22
8.66K/F/0402
0.1U/25V/0402
C2
R14
4.7K/J/0402
R10
NC/10K/F/0402
C175
10U/10V/0805
1N/50V/0402
C168
D11 1N4148
0.1U/25V/0402
C325
D10
NC/UDZS10B
AK
L1 0/J/0603
R6 1K/J/0402
R162 1K/F/0603
1N/50V/0402
C14
L90
0/J/0603
U5
UTC3308L/SO8
1
2
3
4 5
6
7
8
OUT1
IN1-
IN1+
GND IN2+
IN2-
OUT2
V+
C167
10u/16V/1206
R20 0/J/0603
1U/16V/0603
C170
C8
10U/10V/0805
C161
NC/1U/16V/0603
Q2
APM2308A
G
DS
R174
NC/04
R12
10K/F/0402
R154
39/F/0603
1N/50V/0402
C42
C12
22U/16V/1210
Q38
PMBS3904
B
E C
R171
4.7K/J/0402
C26
10u/16V/1206
C194
10u/16V/1206
D8
1N4148
C6
10U/10V/0805
D1 D-1N5819
C7
22U/16V/1210
U1
TC33X-2-503
13
2
1N/50V/0402
C34
4.7U/6.3V/0603
C15
R178
100K/J/0402
C319
0.1U/25V/0603
R168
5.1K/F/0402
0.1U/25V/0402
C171
C4
10U/10V/0805
1U/16V/0603
C9
R175
560/F/0402
TC4
47U/10V/B
R173
4.7K/J/0402
R21
100K/F/0402
R4 1K/J/0402
D2 1N4148
R176
5.1K/F/0402
R255
1K/F/0402
L2 33UH/0.61A/D53LC