Read LG 47LD450 (CHASSIS:LA01B) Service Manual online
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.
+5V_USB
+12V/+15V
C467
0.1uF
50V
+24V
R430
10K
10K
OPT
+3.5V_ST
R411
10K
L417
C482
100pF
50V
OPT
C472
22uF
22uF
10V
R461
4.7K
1%
C401
100uF
16V
+3.5V_ST
R415
100
100
POWER_18_INV_CTL
R456
10K
R452
10
1/10W
1%
+1.5V_DDR
+2.5V_Normal
R421
10K
10K
R447
5.1K
1/16W
5%
PD_+12V
R441
0
IC403
MP2212DN
3
IN
2
GND
4
BS
1
FB
5
VCC
6
SW_1
7
SW_2
8
EN/SYNC
POWER_ON/OFF2_2
RL_ON
C408
0.1uF
16V
0.1uF
16V
POWER_ON/OFF1
R401
10K
L423
3.6uH
NR8040T3R6N
POWER_ON/OFF2_1
C432
0.1uF
16V
0.1uF
16V
PANEL_VCC
C439
100pF
50V
R443
10K
FRC
R467
10K
1%
R416
33K
1%
C455
0.1uF
16V
0.1uF
16V
R442
22K 1%
C402
100uF
16V
C407
0.1uF
16V
16V
R448
12K
1%
PD_+12V
L421
3.6uH
NR8040T3R6N
A_DIM
+12V/+15V
C406
0.1uF
16V
0.1uF
16V
R457
10K
1%
R444
24K
1%
PWM_DIM
SCAN_BLK1/OPC_OUT
R464
10K
C463
100pF
50V
R406
4.7K
4.7K
L420
CIC21J501NE
Q406
2SC3052
2SC3052
E
B
C
C442
10uF
16V
16V
OPT
R473
1
Q401
2SC3052
2SC3052
E
B
C
L404
MLB-201209-0120P-N2
R417
6.2K
1%
ERROR_OUT
R418
6.8K
OPT
+5V_USB
+12V/+15V
C429
100pF
50V
OPT
L412
+12V/+15V
+3.3V_Normal
Q407
2SC3052
2SC3052
E
B
C
R458
12K
C410
0.1uF
0.1uF
C477
0.1uF
16V
0.1uF
16V
R460
27K
1%
C453
22uF
22uF
10V
C444
1uF
10V
C435
4.7uF
4.7uF
10V
OPT
R412
0
POWER_16_GND
L416
C418
0.1uF
50V
+3.5V_ST
+12V/+15V
L401
R465
51K
5%
L422
3.6uH
NR8040T3R6N
C436
0.01uF
25V
POWER_DET
OPC_OUT
R435
22K
R466
1.5K
1%
IC405
AOZ1073AIL
3
AGND
2
VIN
4
FB
1
PGND
5
COMP
6
EN
7
LX_1
8
LX_2
C423
100pF
50V
OPT
C458
10uF
25V
10uF
25V
C466
2200pF
+1.5V_FRC_DDR
C427
100pF
50V
OPT
C430
22uF
22uF
10V
C451
1uF
25V
25V
OPT
+5V_Normal
C424
0.1uF
16V
0.1uF
16V
+1.26V_VDDC
C473
0.1uF
16V
0.1uF
16V
L407
MLB-201209-0120P-N2
C445
4.7uF
OPT
C457
10uF
25V
10uF
25V
C416
0.1uF
0.1uF
16V
OPT
POWER_ON/OFF2_1
+3.3V_Normal
C448
0.1uF
50V
R455
0
C461
22uF
22uF
10V
R478
0
POWER_23_SCAN_BLK2
0.1uF
C456
+3.5V_ST
SCAN_BLK2
0
R472
POWER_24_PWM_DIM
0
R471
POWER_22_PWM_DIM
POWER_ON/OFF2_2
R463
10K
OPT
C404
0.1uF
16V
+24V
R432
75K
75K
1/8W
1%
+3.3V_Normal
C403
10uF
10V
10uF
10V
C405
10uF
25V
10uF
25V
C426
68uF
35V
35V
Q405
2SC3052
E
B
C
C459
10uF
25V
10uF
25V
C438
0.1uF
16V
0.1uF
16V
INV_CTL
+12V/+15V
L413
C465
1uF
10V
PANEL_CTL
1:AK10
R427
10K
OPT
L402
MLB-201209-0120P-N2
0.1uF
C476
C412
0.1uF
16V
OPT
R436
10
1/10W
1%
R449
11K
11K
1/10W
5%
C428
0.1uF
16V
0.1uF
16V
+3.5V_ST
C464
2200pF
R434
120K
OPT
C414
1uF
50V
1uF
50V
+3.5V_ST
+3.5V_ST
+1.5V_DDR
R454
9.1K
R426
10K
10K
OPT
L406
3.6uH
NR8040T3R6N
C460
10uF
25V
10uF
25V
POWER_ON/OFF2_1
C440
0.1uF
16V
0.1uF
16V
IC407
MP2212DN
3
IN
2
GND
4
BS
1
FB
5
VCC
6
SW_1
7
SW_2
8
EN/SYNC
R410
10K
10K
R446
30K
1%
OPT
R438
0
FRC
R462
10K
1%
R431
22K
R425
100
100
POWER_24_INV_CTL
L415
3.6uH
NR8040T3R6N
Q402
RT1P141C-T112
1
2
3
IC401
MP8706EN-C247-LF-Z
3
SW_2
2
SW_1
4
BST
1
IN
5
EN/SYNC
6
FB
7
VCC
8
GND
C419
1uF
25V
OPT
R445
10K
IC408
NCP803SN293
1
GND
3
VCC
2
RESET
R459
10K
R480
100
100
PD_+12V
C443
4.7uF
4.7uF
16V
C420
22uF
10V
22uF
10V
C469
22uF
10V
22uF
10V
C471
22uF
10V
22uF
10V
P403
FW20020-24S
NORMAL_EXPEPT_32
19
14
9
4
18
13
8
3
17
12
7
2
16
11
6
1
20
15
10
5
21
22
23
24
R451
0
POWER_18_A_DIM
R453
0
POWER_20_A_DIM
C484
1uF
25V
OPT
V_SYNC
0
R484
POWER_20_PWM_DIM
L424
CIC21J501NE
C485
0.1uF
16V
0.1uF
16V
R485
0
POWER_22_A_DIM
+3.3V_Normal
R486
4.7K
OPT
R487
22
22
R488
100K
100K
R429
47K
47K
OLP
R477
0
0
POWER_16_V_SYNC
R475
0
POWER_24_GND
R476
0
POWER_23_GND
R419
1K
1K
R422
0
OPT
R470
0
OPT
0.1uF
C486
R447-*1
27K
1%
PD_+3.5V
R450
1K
1%
PD_+3.5V
R402
100
100
+24V
IC406
AOZ1072AI
3
AGND
2
VIN
4
FB
1
PGND
5
COMP
6
EN
7
LX_1
8
LX_2
IC402
AZ2940D-2.5TRE1
2
GND
3
VOUT
1
VIN
Q408
AO3438
AO3438
FRC
G
D
S
Q409
AO3407A
G
D
S
R404
100K
PD_+12V
IC409
NCP803SN293
PD_+12V
1
GND
3
VCC
2
RESET
R482-*1
24K
1%
POWER_+20V
P404
FM20020-24
NORMAL_32
19
14
9
4
18
13
8
3
17
12
7
2
16
11
6
1
20
15
10
5
21
22
23
24
25
P401
SMAW200-H24S2
SMAW200-H24S2
SLIM_32~52
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
R479
0
0
R439
33K
R440 5.6K
R482
24K
1%
POWER_+24V
R403
4.3K
1%
POWER_+24V
R403-*1
5.1K
5% POWER_+20V
C474
0.1uF
0.1uF
R405
2.2K
2.2K
PANEL_DISCHARGE_RES
R407
2.2K
2.2K
PANEL_DISCHARGE_RES
C411
22uF
10V
22uF
10V
OPT
100
R437
POWER_20_ERROR_OUT
100
R420
POWER_24_ERROR_OUT
C409
330uF
4V
4V
OPT
POWER
GP2_Saturn7M
Ver. 1.2
Power_DET
R2
+5V_Normal
INV_ON
R2
3A
PWM_DIM
LGD
+2.5V/+1.8V
22
Placed on SMD-TOP
PIN No
Vout=0.8*(1+R1/R2)
3A
Placed on SMD-TOP
R1
Vout=0.8*(1+R1/R2)
+5V_USB
PANEL_POWER
AUO
15V-->3.6V
VBR-A
C IN
Vd=550mV
1074 mA
S7M DDR 1.5V
PWM_DIM
Err_out
Err_out
3A
1934 mA
Vout=(1+R1/R2)*0.8
20
ST_3.5V-->3.5V -> 3.375V
+1.5V_DDR_FRC
Placed on SMD-TOP
Err_out
R2
Placed on SMD-TOP
R1
New item
Replaced Part
R1
INV_ON
PWM_DIM
SHARP
INV_ON
300 mA
18
R1
PWM_DIM
R1
20V-->3.5V
24V-->3.48V
GND
Close to IC
Vout=(1+R1/R2)*0.8
24
NC
FROM LIPS & POWER B/D
MAX 2000mA
R2
A-DIM
2026 mA
Close to IC
C IN
12V-->3.58V
2A
Vout=0.8*(1+R1/R2)
Replaced Part
S7M core 1.26V volt
3A
+3.3V_Normal
MAX 1A
NC
CMO(09)
INV_ON
R2
<OS MODULE PIN MAP>
4
23
L_DIM
SCLK
MOSIN
+3.5V_ST -> 3.375V
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