Read LG 47LD455B / 47LD455H (CHASSIS:LC01W) 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.
+12V/+15V
0 . 1 u F
50V
50V
C467
+24V
10K
OPT
R430
R430
+3.5V_ST
10K
R411
L417
100pF
50V
OPT
C482
4.7K
1%
R461
100uF
16V
C401
+3.5V_ST
100
R415
POWER_18_INV_CTL
10K
R456
1/10W
10
1%
R452
+1.5V_DDR
+2.5V_Normal
10K
R421
1/16W
5.1K
5%
R447
PD_+12V
0
R441
MP2212DN
IC403
NON_FRC
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
0 . 1 u F
16V
16V
C408
POWER_ON/OFF1
10K
R401
NR8040T3R6N
3.6uH
L423
POWER_ON/OFF2_1
0 . 1 u F
16V
16V
C432
PANEL_VCC
100pF
50V
C439
10K
R443
FRC
10K
1%
R467
33K
1%
R416
0 . 1 u F
16V
16V
C455
22K 1%
R442
100uF
16V
C402
0 . 1 u F
16V
C407
12K
1%
PD_+12V
R448
NR8040T3R6N
3.6uH
L421
A_DIM
+12V/+15V
0 . 1 u F
16V
16V
C406
10K
1%
R457
24K 1%
R444
PWM_DIM
SCAN_BLK1/OPC_OUT
10K
R464
100pF
50V
C463
4.7K
R406
CIC21J501NE
L420
2SC3052
Q406
E
B
C
10uF
16V
OPT
16V
OPT
C442
1
R473
2SC3052
Q401
E
B
C
MLB-201209-0120P-N2
L404
6.2K
1%
R417
ERROR_OUT
6.8K
OPT
R418
+5V_USB
+12V/+15V
100pF
50V
OPT
C429
L412
+12V/+15V
+3.3V_Normal
2SC3052
Q407
E
B
C
12K
R458
0 . 1 u F
C410
0 . 1 u F
16V
16V
C477
27K
1%
R460
22uF
10V
C453
1uF
10V
C444
4 . 7 u F
10V
OPT
C435
0
POWER_16_GND
R412
L416
0 . 1 u F
50V
C418
+3.5V_ST
+12V/+15V
L401
51K
5%
R465
NR8040T3R6N
3.6uH
L422
0 . 0 1 u F
25V
C436
POWER_DET
OPC_OUT
22K
R435
1.5K
1%
R466
AOZ1073AIL
IC405
3
AGND
2
VIN
4
FB
1
PGND
5
COMP
6
EN
7
LX_1
8
LX_2
100pF
50V
OPT
C423
10uF
25V
25V
C458
2200pF
C466
+1.5V_FRC_DDR
100pF
50V
OPT
C427
22uF
10V
10V
C430
1uF
25V
25V
C451
OPT
+5V_Normal
0 . 1 u F
16V
16V
C424
+1.26V_VDDC
0 . 1 u F
16V
16V
C473
MLB-201209-0120P-N2
L407
4.7uF
OPT
C445
10uF
25V
25V
C457
0 . 1 u F
16V
C416
OPT
POWER_ON/OFF2_1
+3.3V_Normal
0 . 1 u F
50V
50V
C448
0
R455
0
R478
POWER_23_SCAN_BLK2
0 . 1 u F
C456
+3.5V_ST
SCAN_BLK2
0
POWER_24_PWM_DIM
R472
0
POWER_22_PWM_DIM
R471
POWER_ON/OFF2_2
10K
R463
OPT
0 . 1 u F
16V
C404
+24V
1/8W
75K
1%
R432
+3.3V_Normal
10uF
10V
10V
C403
10uF
25V
25V
C405
68uF
35V
C426
2SC3052
Q405
E
B
C
10uF
25V
25V
C459
0 . 1 u F
16V
16V
C438
INV_CTL
+12V/+15V
L413
1uF
10V
C465
PANEL_CTL
1:AK10
10K
OPT
OPT
R427
MLB-201209-0120P-N2
L402
0 . 1 u F
C476
0.1uF
16V
OPT
C412
1/10W
10
1%
R436
1/10W
11K
5%
R449
0 . 1 u F
16V
16V
C428
+3.5V_ST
2200pF
C464
120K
OPT
R434
1uF
50V
50V
C414
+3.5V_ST
+3.5V_ST
+1.5V_DDR
9.1K
R454
10K
R426
OPT
NR8040T3R6N
3.6uH
L406
10uF
25V
25V
C460
POWER_ON/OFF2_1
0 . 1 u F
16V
16V
C440
MP2212DN
IC407
3
IN
2
GND
4
BS
1
FB
5
VCC
6
SW_1
7
SW_2
8
EN/SYNC
10K
R410
30K
1%
OPT
R446
0
R438
FRC
10K
1%
R462
22K
R431
100
POWER_24_INV_CTL
R425
NR8040T3R6N
3.6uH
L415
RT1P141C-T112
Q402
1
2
3
MP8706EN-C247-LF-Z
IC401
3
SW_2
2
SW_1
4
BST
1
IN
5
EN/SYNC
6
FB
7
VCC
8
GND
1uF
25V
OPT
C419
C419
10K
R445
NCP803SN293
IC408
1
GND
3
VCC
2
RESET
10K
R459
100
R480
PD_+12V
4 . 7 u F
16V
C443
FW20020-24S
P403
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
0
POWER_18_A_DIM
R451
0
POWER_20_A_DIM
R453
1uF
25V
OPT
C484
V_SYNC
0
POWER_20_PWM_DIM
R484
CIC21J501NE
L424
0 . 1 u F
16V
16V
C485
0
POWER_22_A_DIM
R485
+3.3V_Normal
4.7K
R486
OPT
22
R487
100K
R488
47K
R429
OLP
0
POWER_16_V_SYNC
R477
0
POWER_24_GND
R475
0
POWER_23_GND
R476
1K
R419
0
POWER_22_SCAN_BLK1/OPC_OUT
R422
0
OPT
R470
0 . 1 u F
C486
27K
1%
PD_+3.5V
R447-*1
1K
1%
PD_+3.5V
R450
100
R402
+24V
AOZ1072AI
IC406
3
AGND
2
VIN
4
FB
1
PGND
5
COMP
6
EN
7
LX_1
8
LX_2
AZ2940D-2.5TRE1
IC402
2
GND
3
VOUT
1
VIN
AO3438
Q408
FRC
G
D
S
AO3407A
Q409
G
D
S
100K
R404
PD_+12V
NCP803SN293
IC409
PD_+12V
1
GND
3
VCC
2
RESET
24K
1%
R482-*1
POWER_+20V
FM20020-24
P404
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
SMAW200-H24S2
SLIM_32~52
P401
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
0
R479
33K
R439
5.6K
R440
24K
1%
R482
POWER_+24V
4.3K
1%
R403
POWER_+24V
5.1K
5%
R403-*1
POWER_+20V
0 . 1 u F
C474
2.2K
R405
PANEL_DISCHARGE_RES
2.2K
R407
PANEL_DISCHARGE_RES
22uF
10V
10V
C411
OPT
100
POWER_20_ERROR_OUT
R437
100
R420
POWER_24_ERROR_OUT
330uF
4V
4V
C409
OPT
3.9K
C419-*1
PWM_PULL-DOWN
5.6K
1%
R403-*2
POWER_+18.5V
24K
1%
POWER_+18.5V
R482-*2
MP2212DN(Marking)
IC403-*1
FRC
3
IN
2
GND
4
BS
1
FB
5
VCC
6
SW_1
7
SW_2
8
EN/SYNC
22uF
16V
16V
C420
10uF
16V
16V
C461
10uF
16V
16V
C469
10uF
16V
16V
C471
10uF
16V
C472
+5V_USB
POWER
GP2_Saturn7M
V e r . 1 . 2
Power_DET
R2
+5V_Normal
INV_ON
R2
3A
PWM_DIM
o r L I P S
+2.5V/+1.8V
22
Placed on SMD-TOP
PIN No
V o u t = 0 . 8 * ( 1 + R 1 / R 2 )
3A
Placed on SMD-TOP
R1
V o u t = 0 . 8 * ( 1 + R 1 / R 2 )
+5V_USB
PANEL_POWER
AUO
VBR-A
C IN
Vd=550mV
1074 mA
S7M DDR 1.5V
26/32/52:PWM
E r r _ o u t
3A
1934 mA
V o u t = ( 1 + R 1 / R 2 ) * 0 . 8
20
S T _ 3 . 5 V - - > 3 . 3 7 5 V
+1.5V_DDR_FRC
Placed on SMD-TOP
E r r _ o u t
R2
Placed on SMD-TOP
R1
New item
R e p l a c e d P a r t
R1
INV_ON
PWM_DIM
SHARP
INV_ON
300 mA
18
R1
PWM_DIM
R1
20V-->3.51V
24V-->3.64V
24V-->3.64V
C l o s e t o I C
V o u t = ( 1 + R 1 / R 2 ) * 0 . 8
24
NC
FROM LIPS & POWER B/D
MAX 2000mA
R2
A-DIM
2026 mA
C l o s e t o I C
C IN
12V-->3.58V
2A
V o u t = 0 . 8 * ( 1 + R 1 / R 2 )
R e p l a c e d P a r t
S 7 M c o r e 1 . 2 6 V v o l t
3A
+3.3V_Normal
MAX 1A
NC
CMO
INV_ON
R2
<OS MODULE PIN MAP>
4
23
IPS-@
+ 3 . 5 V _ S T - > 3 . 3 7 5 V
INV_ON
E r r _ o u t
GND
GND
GND
GND
52/60:ERROR
26/32HD:NC
GND
PWM_DIM
NC
(PSU)
(PSU)
(PSU)
(PSU)
Only for 32/37LED MODEL
1 8 . 5 V - - > 3 . 5 V
60:NC
26/32/52:GND
60:PWM
LGD(PSU)
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