LG 43LF510A Service Manual page 23

OPT
0.1uF
C839
OPT
0.1uF
C840
OPT
L805
UBW2012-121F
OPT
L804
UBW2012-121F
R801
0
1/8W
R802
0
1/8W
R803
0
1/8W
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
Copyright © 2015 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
TOTAL LED DRIVER BLOCK
+19V
C801 C802 C803
47uF 10uF 0.1uF
25V 25V 50V
OPT
C806
R808 R809
100pF
180K 180K
1/16W 1/16W
50V
IC801
[EP]
TPS40210DGQR
RC VDD
1 10
R807 C807
10K 0.22uF SS BP
2 9
1/16W 16V
R804
1K DIS/EN GDRV
BOOST_EN 3 8
COMP ISNS
4 7
FB GND
5 6
C804
0.033uF
50V
C805
470pF
50V
R805
18K
1%
R806
1K
1%
FIRST BOOST UP
P801
SMAW200-04
1
2
3
VOUT#2
4
32_43 inch
L807
CIS21J121
120
120OHM D801
L808 MBRD10U100CT
L801
A1 VOUT#1=49V
33uH
REDUCE RIPPLE CURRENT
C
A2
R822
C813 C815 C816 C837 C817
L809 100K
33uF 33uF 33uF 10uF 1uF
1/8W
120OHM
100V 100V 100V 35V 50V
OPT
To Improve EMI Issue R823
C838 C818
100K
10uF 1uF
1/8W
35V 50V
OPT
C812
C811 C814
100V
100V 100V
220pF 220pF 220pF OPT
R827
OPT
10K
INV_ON
D
Q801
G
AOD478
R864 S
3.3
D804
1N4148W-G
R815
3.9K
PWM_DIM
1%
C808 C809 C810
1uF 0.1uF
330pF R818 R820 R861
25V 50V
50V 0.1 0.1 47K
R812
3.9K
1W 1W
1%
R825
1K BLU_CURRENT_CTL
121211
1K -> 3.9K
220p -> 330p
VOUT = VREF*(1+51K/680)
= 0.7 *(1+51K/680)
= 53.2V
R824
680
1/8W
1%
EXCEPT C500 C501
C819
33uF
49 inch
R826
0
43_49 inch
C820
33uF
REDUCE INDUCTOR TEMP ISSUE
32inch
L806
CIS21J121
120
43_49 inch
To Improve EMI Issue
L802 L803
33uH 33uH
C829
100V
220pF
+3.3V_M
C830
100V
220pF
R843 R845 R846 R847 R848 R849
100 100 100 100 100 100
R833
R836
3K
1K
IC802
C
1% R839 C826
R828
100K DT1641AS
10K 1000pF [EP]GND
B Q802
1%
50V
MMBT3904(NXP)
E
EN VIN
49inch
1 24
R831-*1
32_43inch
150K
R831 R835
120K 270K OVP VREF C831
2 23
32inch
1/8W
R837 C822
1%
30K 1000pF NC_1 CS
3 22
1% 50V
43inch 49inch
R837-*1 R837-*2
PGND_1 NDRV
13K 8.2K
4 21
1% 1%
R830
PGND_2 RSS
100
5 20
R832
C821
100pF
100K PDIM COMP
50V
6 19
OPT
R838
RISET RT
100K
7 18
43inch 32inch
49inch
R840
R840-*2 R840-*1
15K LS8 LS1
27K 12K 8 17
1%
1%
1% 32inch
R841
49inch 43inch
3.6K LS7 LS2
R841-*2 R841-*1 9 16
1%
2.7K 10K
1% 1%
LS6 LS3
10 15
LS5 LS4
11 14
NC_2 LGND
12 13
49 inch
49 inch 43_49inch
C823 C827 C842
32inch
4.7uF 1uF C827-*1 1uF
50V 100V 4.7uF 100V
50V
49 inch 49 inch 49 inch
32_43 inch
43 inch C824 C828 C841
C828-*1
R829 4.7uF 1uF 1uF
0
0 50V 100V 100V
32_43 inch 1/4W
R834 5%
49 inch
0
C825
4.7uF
50V
49 inch
D802
UF3D(SUZHOU GRANDE)
32_43 inch
C833
D803
100V
BR210
220pF
C834 100V
100V
220pF
R850 R856 R858 R859
100 100 100 100
D
49 inch
+19V
Q803
G SMN630LD
S
D
Q803-*1
G
C832 AOD478
1uF 32_43inch
S
1uF
25V
25V
R853
3.3
1/16W
R854 R857
220K 1% 30K 1%
C835
4700pF
50V
R860
R855 C836
0.1
1.5K 1% 0.1uF
25V
R851
39K
1%
R852
1.5K
1%
15.5_ECI_M8RR 2015/03/03
LED_DRIVER 8 8
LGE Internal Use Only