Read LG 42LV5400 (CHASSIS:LA12E) Service Manual online
THERMAL
THERMAL
THERMAL
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
R524
0
POWER_24_GND
R552
10K
OPT
L503
MLB-201209-0120P-N2
C510
0.01uF
50V
0.01uF
50V
R558-*1
22K
5V_PANEL
A_DIM
+2.5V_BCM35230
0
R540
NON_OPC/NON_IOP
R571
1.5K
1%
PWM_DIM_22
+3.5V_ST
C519
0.1uF
50V
C503
10uF
16V
10uF
16V
+12V
+0.9V_CORE
Q502
RT1P141C-T112
1
2
3
R543
6.8K
OPT
C513
0.1uF
16V
C530
3300pF
3300pF
50V
R547
10K
10K
PANEL_VCC
+3.3V_Normal
R554
10K
10K
OPT
A_DIM_20
POWER_ON/OFF2_1
C558
0.1uF
16V
0.1uF
16V
OPT
C532
0.1uF
16V
0.1uF
16V
OPT
R575
2K
1/8W
PANEL_DISCHARGE_REG
L509
3.6uH
INV_CTL
R531
0
POWER_20_A_DIM
C546
10uF
16V
10uF
16V
A_DIM_20
C507
1000pF
50V
INV_CTL_18
R559 1.8K
12V_PANEL
R535
0
POWER_22_A_DIM
C509
220pF
50V
PANEL_CTL
R566
10K
R522
10K
10K
OPT
R505
6.8K
C560
1uF
25V
OPT
Q504
2SC3052
E
B
C
0
R527
POWER_24_PWM_DIM
0
R526
POWER_22_PWM_DIM
C538
47uF
10V
+5V_Normal
L516
3.6uH
NR8040T3R6N
R520
100
100
R577
4.7
0.1uF
C533
OPT
+12V
R576
2K
1/8W
PANEL_DISCHARGE_REG
+3.5V_ST
L514
BLM18PG121SN1D
R572
10K
1%
C570
22uF
16V
22uF
16V
C555
2700pF
+3.5V_ST
C551
0.1uF
50V
0.1uF
50V
+12V
ERROR_OUT_24
R545
59K
1%
59K
1%
L515
3.6uH
NR8040T3R6N
R532
100
100
POWER_18_INV_CTL
R501
12K
1/16W
1%
C581
0.1uF
16V
0.1uF
16V
NON_PD_+3.5V
C557
2200pF
C527
10uF
6.3V
C528
10uF
16V
16V
+24V
A_DIM
C505
10uF
16V
10uF
16V
C568
22uF
10V
22uF
10V
R502
10K
IC505
AOZ1024DI
EAN60660601
1
PGND
2
VIN
3
AGND
4
FB
5
COMP
6
EN
7
LX
+3.3V_Normal
R542
10K
C522
22uF
10V
22uF
10V
0
R538
POWER_20_PWM_DIM
Q501
2SC3052
2SC3052
E
B
C
R567
51K
1%
C508
0.1uF
16V
0.1uF
16V
+5V_USB
C564
100pF
50V
OPT
C516
4.7uF
10V
R578
4.7
L501
MLB-201209-0120P-N2
R544
18K
1%
18K
1%
INV_CTL_18
R551
10K
10K
OPT
R536
10K
+3.5V_ST
R515
0
5%
0
5%
PD_+3.5V
POWER_ON/OFF2_1
C559
0.1uF
16V
0.1uF
16V
OPT
C524
47uF
10V
47uF
10V
OPT
R533
0
POWER_18_A_DIM
C565
100pF
50V
OPT
C531
1uF
1uF
OPT
R558
10K
12V_PANEL
R565
10K
C563
0.1uF
50V
0.1uF
50V
+3.3V_Normal
L506
120-ohm
R507
10K OPT
C525
10uF
10V
10uF
10V
R568
1.5K
1%
+12V
L502
BLM18PG121SN1D
+12V
Q506
2SC3052
2SC3052
E
B
C
R570
51K
1%
C567
22uF
10V
22uF
10V
L507
BLM18PG121SN1D
C537
50V
OPT
R528
10K
10K
OPT
C571
22uF
16V
22uF
16V
OPT
+3.5V_ST
L504
MLB-201209-0120P-N2
PWM_DIM
P502
FW20020-24S
FW20020-24S
NORMAL_26~55
19
14
9
4
18
13
8
3
17
12
7
2
16
11
6
1
20
15
10
5
21
22
23
24
ERROR_OUT
C520
0.1uF
16V
0.1uF
16V
ESD
POWER_ON/OFF2_1
C523
22uF
10V
10V
OPT
ERROR_OUT
+3.5V_ST
R525
13K
R550
10K
1%
Q505
2SC3052
2SC3052
E
B
C
+3.3V_Normal
0
R541
POWER_24_ERROR_OUT
POWER_ON/OFF2_2
C552
10uF
10uF
25V
PWM_DIM_22
R555
22K
R508
4.7K
4.7K
R557
22K
0
R529
POWER_20_ERROR_OUT
R504
2K
2K
R537
100
POWER_24_INV_CTL
POWER_ON/OFF2_2
R559-*1
2.7K
5V_PANEL
R523
4.7K
OPT
L513
BLM18PG121SN1D
R519
100
100
NON_PD_+3.5V
PWM_DIM
IC504
AP2132MP-2.5TRG1
EAN61387601
3
VIN
2
EN
4
VCTRL
1
PG
5
NC
6
VOUT
7
ADJ
8
GND
9
[EP]
+12V
+24V
+5V_Normal
C545
10uF
16V
10uF
16V
R549
4.7K
1%
Q507
AO3407A
G
D
S
R506
330
330
L511
MLB-201209-0120P-N2
12V_PANEL
ERROR_OUT_24
R546
1K
1K
+12V
C580
0.1uF
16V
0.1uF
16V
A_DIM
POWER_DET
P501
SMAW200-H24S2
SLIM_32~55
19
12V
14
GND
9
3.5V
4
24V
18
INV ON
13
GND
8
GND
3
24V
17
12V
12
3.5V
7
GND
2
24V
16
GND/V-sync
11
3.5V
6
GND
1
PWR ON
20
A.DIM
15
GND
10
3.5V
5
GND
21
12V
22
P.DIM1
23
GND/P.DIM2
24
Err OUT
25
C506
0.1uF
50V
R548
27K
1%
R569
10K
1%
RL_ON
R553
47K
47K
C515
0.47uF
25V
+1.5V_DDR
R591
10K
10K
POWER_ON/OFF1
+3.5V_ST
R518
0
POWER_16_GND
C591
0.1uF
16V
C539
10uF
6.3V
C594
22uF
10V
560pF
C593
50V
10uF
C590
10V
L517
BLM18PG121SN1D
L/DIM0_VS
L_VS
R574
0
POWER_16_URSA_SCAN
R573
0
POWER_16_BCM_SCAN
R595
4.3K
1%
1%
R593
3.9K
1%
3.9K
1%
R592
1K
1%
1K
1%
R510-*3
4.7K
1%
4.7K
1%
PD_+18.5V
R510-*4
5.6K
5.6K
1%
PD_+20V
R511-*3
1.21K
1.21K
1%
PD_+18.5V
R511-*4
1.3K
1%
1.3K
1%
PD_+20V
R517
100K
100K
R516
100K
100K
NON_PD_+3.5V
R512
2.7K
1%
2.7K
1%
PD_+12V
R513
1.21K
1%
1%
NON_PD_+3.5V
R510
8.2K
1%
8.2K
1%
PD_24V
R511
1.5K
1%
1.5K
1%
PD_24V
C550
0.01uF
50V
C534
22uF
22uF
10V
C535
22uF
22uF
10V
Q503
AON7430
3
S_3
2
S_2
4
G
1
S_1
5
D
Q508
AON7200
3
S_3
2
S_2
4
G
1
S_1
5
D
L505
1uH
IC508
AP7173-SPG-13 HF(DIODES)
3
VCC
2
PG
4
EN
1
IN
5
GND
6
SS
7
FB
8
OUT
9
[EP]
IC501
TPS40192DRCR
3
COMP
2
FB
4
VDD
1
ENABLE
5
PGD
6
BP5
7
LDRV
8
BOOT
9
SW
10
HDRV
11
EP_GND
R564
12K
R563
12K
IC506
AOZ1073AIL-3
3
AGND
2
VIN
4
FB
1
PGND
5
COMP
6
EN
7
LX_1
8
LX_2
IC507
AOZ1073AIL-3
3
AGND
2
VIN
4
FB
1
PGND
5
COMP
6
EN
7
LX_1
8
LX_2
R503
1K
C504
100pF
50V
IC502
NCP803SN293
NON_PD_+3.5V
1
GND
3
VCC
2
RESET
IC503
NCP803SN293
1
GND
3
VCC
2
RESET
DUAL COMPONENT
+1.5V_DDR
Err_out
PANEL_POWER
Q502
R1
+2.5V_BCM35230
+3.3V_NORMAL
22
LED:GND
FROM LIPS & POWER B/D
IC502,IC503
Max 960 mA
R2
INV_ON
20
Vout=0.8*(1+R1/R2)
R1
Q501,Q504,
Q505,Q506
Q505,Q506
PWM_DIM
R2
Err_out
Switching freq: 500K
PIN No
R2
+5V_USB+WIFI
A-DIM
58
R1
Vout=0.591*(1+R1/R2)
Vout=0.6*(1+R1/R2)
Placed on SMD-TOP
OS Module OPT
5
15V-->3.6V
Vout=0.8*(1+R1/R2)
CMO(09)
<OS MODULE PIN MAP>
24
1ST : EAN61151001, 2ND : EAN60670101
20V-->3.5V
TYP 1450mA
LGD
R2
1ST : 0TRIY80001A 2ND : 0TR387500AA
Power_DET
PWM_DIM
Switching freq: 500K
AUO
3A
A-DIM
GND
ST_3.5V-->3.5V
CHECK PWR/MODULE PIN MAP
Max 7350 mA
Placed on SMD-TOP
INV_ON
MAX 2.8A
PWM_DIM
PWM_DIM
not to RESET at 8kV ESD
Vout=0.8*(1+R1/R2)
3A
R1
INV_ON
MAX 1A
TEST
Vout=0.8*(1+R1/R2)
NC
Switching freq: 500K
24V-->3.48V
2A
1ST : EBK60752501, 2ND : EBK61011501
SHARP
Placed on SMD-TOP
Max 800mA
Err_out
12V-->3.58V
Q507
INV_ON
Switching freq: 600K
BCM35230
POWER
R2
R1
1ST : 0TRIH80004A, 2ND : EBK61012501, 3RD : 0TR102009AM
MAX 1.9A
4A
18
+5V_Normal
+0.9V_CORE_BCM35230
V4:VBR-A
V5:NC
V5:NC
#16/#20/#23
LD - GND OR USE
LE(N.L.D.) - OPEN
LE(L.D.) - USE
LD - GND OR USE
LE(N.L.D.) - OPEN
LE(L.D.) - USE
R2
R1
Vout=0.8*(1+R1/R2)
1.5A
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