LG 28LB45 series Service Manual page 24

FIRST BOOST UP
+19V
21.6/26/27.5/29 Panel
C1001
C1000 C1004
10uF
10uF 0.1uF
25V
50V
25V
21.6/26/27.5/29 Panel
21.6/26/27.5/29 Panel OPT 21.6/26/27.5/29 Panel
C1005
R1006
100pF
220K
50V 1/16W
+3.3V_ST
21.6/26/27.5/29 Panel
IC1000
TPS40210DGQR
RC
1
21.6/26/27.5/29 Panel
R1005 C1007
0.22uF SS
10K
2
1/16W 16V
21.6/26/27.5/29 Panel
DIS/EN
3
COMP
4
CMI_29" FB
21.6/26/27.5/29 Panel 5
21.6/26/27.5/29 Panel C1002-*1
C
R1000 0.033uF
4.7K
B Q1000 50V
MULTI_ON
MMBT3904(NXP)
24V_Panel
E C1002
OPT 2200pF
50V
R1001
121118
10K 24V_Panel
CMI_29"
Change 2012 -> 1608
C1006
C1006-*1
for cost down
47pF
470pF
50V
50V
24V_Panel
R1004
470K
1/16W
5%
CMI_29"
R1004-*1
1K
1/16W
1%
CSOT 27.5" Connector
+19V
+24V_BLU
P1000
+24V_BLU 20022WR-14A00
JP1002
24V
1
24V
2
24V
3
24V
4
24V
5
GND
6
GND
7
GND
8
GND
9
GND
10
ERROR_OUT
11
JP1000
JP1004
INV_ON
12
WLED_ENABLE
WLED_ENABLE
NC
13
JP1001
JP1005
PWN_DIM
14
WLED_DIM_ADJ
WLED_DIM_ADJ
C1003
1uF 15
10V
OPT GND
JP1003
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 © 2014 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
+19V
+24V_BLU
24V_Panel
21.6/26/27.5/29 Panel 21.6/26/27.5/29 Panel
R1051
L1000 D1000 0
33uH BR210
100V
21.6/26/27.5/29 Panel
21.6/26/27.5/29 Panel
C3430
C1012 C1013 R1050
1uF
100K
33uF 33uF 50V
100V 100V 21.6/26/27.5/29 Panel
21.6/26/27.5/29 Panel
-55TO+105C -55TO+105C
R1007
30K
C1014
21.6/26/27.5/29 Panel
R1049
1uF
1/16W 100K
50V
21.6/26/27.5/29 Panel
21.6/26/27.5/29 Panel
[EP]
VDD
10
BP
9
21.6/26/27.5/29 Panel D
21.6/26/27.5/29 Panel
R1009
Q1001
GDRV
3.3 AOD478
G
8
1/16W
24V_Panel S
ISNS R1008
7
1K
1%
GND
6
21.6/26/27.5/29 Panel
24V_Panel
C1008 C1009 C1010
R1047
1uF 0.1uF 100pF
1K
25V 50V 50V
1%
21.6/26/27.5/29 Panel 24V_Panel
121212
1k->3.9K
220pF->330pF
121118
Change 10V -> 25V CMI_29" CMI_29"
CMI_29"
for derating R1008-*1
C1010-*1
R1047-*1 3.9K
330pF
3.9K
50V
1%
1%
VOUT = VREF*(1+51K/680)
CMI_29"
R1013
= 0.7 *(1+51K/680)
680
= 53.2V
1/8W
1%
LGD 21.6"/26" Connector
P1001
SM14B-SRSS-TB
JP1006
24V
1
24V
2
24V
3
24V
4
24V 5
GND
6
Option
GND
(21.6/26
7 Input
/27.5
Voltage
PANEL
/29 Panel)
GND
8
CSOT(27.5") 24V
GND
9
24V
LGD(21.6/26")
GND
10
19V
CMI(23.6") Not Set
ERROR_OUT
11
LGD(FHD) 19V Not Set
INV_ON
12
CMI(29") 53.2V
NC
13
PWN_DIM
14
C1011
1uF 15
10V
OPT GND
JP1007
LGD FHD/CMI 24"
R1014
0
REDUCE INDUCTOR TEMP ISSUE
CMI_29"
VOUT#1=53.2V
R1015
0
WLED_ENABLE
CMI_29" CMI_29"
LGD FHD/CMI 24"
R1017-*1 R1020-*1
R1017
120K 270K
0
1/8W 1/8W
1/8W
1% 1%
CMI_29"
5%
R1022-*1
6.2K
1%
CMI 29"Panel OVP
LGD FHD/CMI
R1016
100
WLED_DIM_ADJ
BLU_CURRENT_CTL
13
Option Option
Option
Option
(LGD FHD (LGD FHD
(24V Panel)
(CMI 29")
/CMI) /CMI 24")
set set Not set Not set Not set
set set Not set Not set Not set
Not set Set Set Not Set
Not set Set Set Not Set
set
Not Set Set Not Set Set
05002HR-H12J05
P1003
CMI_23.6" Connector
CMI_29"
P1002
SMAW200-03
3
2
1
CMI_29"
L1001 L1002
33uH 33uH
LGD FHD/CMI
LGD FHD/CMI 24"
R1054
0
1/8W
+19V
LGD FHD/CMI
LGD FHD/CMI IC1001
LGD FHD/CMI
R1023 C1020 DT1641AS
[EP]GND
100K 100pF
1%
50V
EN VIN
1 24
LGD FHD/CMI 24" LGD FHD/CMI
R1020
C1022
OVP VREF
510K
2 23
LGD FHD/CMI
1/8W
C1021 1uF
LGD FHD/CMI 24"
1% 25V
1000pF NC_1 CS
R1022
3 22
22K 50V
1%
PGND_1 NDRV
4 21
PGND_2 RSS
5 20
LGD FHD/CMI LGD FHD/CMI
C1019
R1019
100pF
100K
50V
PDIM COMP
1%
6 19
LGD FHD/CMI
R1021
RISET RT
75K
7 18
1%
LS8 LS1
LGD FHD/CMI
R1024 8 17
1.5K
1%
CMI_29"
LS7 LS2
R1024-*1 9 16
3K LGD FHD/CMI
1%
R1025
22K
LS6 LS3
1%
10 15
LS5 LS4
11 14
NC_2 LGND
12 13
LED_CH3/23.8"LGD
R1048 0
LED_CH3/23.8"LGD
R1055 0
LGD FHD/23.6"
JP1010 R1033 0
12
LGD FHD/23.6"
JP1011
R1034 0
11 R1063 R1064
NOT23.8"LGD/ NOT 23.6"
JP1012 23.6" 23.6"
R1031 0
0 0
10
JP1014
R1032 0
9
NOT23.8"LGD/ NOT 23.6"
8
JP1013
7
6
5
M1002
4
M1000
3
M1001
2
M1003
1
CMI_29"
R1026
10K
CMI_29"
ZD1000
33V
JP1008
JP1009
LGD FHD/CMI
D1001
UF3D(SUZHOU GRANDE)
D
CMI_29"
LGD FHD/CMI
Q1002
R1052 0
G SMK630D
S
D
LGD FHD/CMI 24"
Q1002-*1
LGD FHD/CMI AOD478
G
C1023
1uF
25V S
LGD FHD/CMI LGD FHD/CMI
R1037 R1039
220K 1% 30K 1%
C1024
4700pF
50V
LGD FHD/CMI
LGD FHD/CMI LGD FHD/CMI 24"
C1025
R1038
1.5K 1% 0.047uF
25V
LGD FHD/CMI
R1035
CMI_29"
39K
C1025-*1
1%
0.1uF
R1036
25V
1.5K
1%
LGD FHD/CMI
L100
500-ohm REDUCE RIPPLE CURRENT
LED_BEAD
L100-*1
0 CMI_29"
C1028 C1029 OPT
LED_0 ohm C1027 LGD FHD/CMI 24"
R1046
0.1uF 0.1uF C1028-*1 R1046-*1
33uF 1M
250V 250V 1uF 1/8W
100V 0
1%
OPT OPT 100V
-55TO+105C
R1061
OPT
0
C1029-*1
CMI_29"
1uF
100V
CMI_29" C1026 LGD FHD/CMI 24"
R1045
1M R1045-*1
33uF
1/8W
0
100V
1%
-55TO+105C
7
M1004
6
6
R1065
M1005
23.6" 5
0
5
M1006
4
4
3
3
M1007
2
2
LGD FHD/23.6"
M1008
R1041 0
1
1
LGD FHD/23.6" R1062
R1040 0
23.6"
12507WR-06L
0
R1067
R1066
23.6" LGD FHD 12507WR-06L
23.6"
R1042 0
0
0 P1004 LGD FHD
LGD FHD
LGD FHD
R1043 0
LED Driver Setting
21.5 inch LGD Panel : LED_CH2, LED_CH3 SET
23 inch LGD Panel : LED_CH2, LED_CH3 SET
27 inch LGD Panel : LED_CH2 SET
29 inch CMI Panel : LED_CH1, LED_CH2 SET
23.8 inch LGD FHD : LED_CH1/CH2 NOTSET
LED_CH3 SET
MA55 2013/05/23
LED DRIVER 10
LGE Internal Use Only
7
P1005