Read LG 42LD460 / 42LD460C / 42LD450 / 42LD461C / 42LD461F (CHASSIS:LB01B) Service Manual online
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.
+12V/+15V
+24V/+15V
R7522
10K
10K
OPT
R7510
10K
L7512
R7563
4.7K
1%
R7558
10K
+2.5V_Normal
R7548
5.1K
5%
Adapter
R7532
0
POWER_ON/OFF2_2
POWER_ON/OFF2_2
R7521
10K
10K
POWER_ON/OFF2_1
C7553
0.1uF
16V
0.1uF
16V
PANEL_VCC
C7528
100pF
50V
R7567
10K
1%
R7512
33K
1%
C7547
0.1uF
16V
0.1uF
16V
R7533
22K 1%
L7513
3.6uH
3.6uH
NR8040T3R6N
AMP_VCC
R7536
24K
1%
Q7503
2SC3052
2SC3052
E
B
C
C7529
10uF
16V
16V
OPT
R7552
1
R7513
6.2K
1%
+12V/+15V
+12V/+15V
Q7505
2SC3052
2SC3052
E
B
C
R7559
12K
C7570
0.1uF
16V
0.1uF
16V
R7562
27K
1%
C7546
22uF
22uF
10V
C7530
1uF
10V
L7511
+3.5V_ST
Q7500
E
B
C
+12V/+15V
L7500
R7565
51K
5%
L7514
3.6uH
3.6uH
NR8040T3R6N
C7525
0.01uF
25V
POWER_DET
R7527
22K
R7566
1.5K
1%
IC7506
AOZ1073AIL
3
AGND
2
VIN
4
FB
1
PGND
5
COMP
6
EN
7
LX_1
8
LX_2
C7562
100pF
50V
OPT
C7550
10uF
25V
10uF
25V
C7560
2200pF
C7565
100pF
50V
C7520
22uF
22uF
10V
C7541
1uF
25V
25V
OPT
+5V_Normal
C7516
0.1uF
16V
0.1uF
16V
+1.26V_VDDC
C7549
10uF
25V
10uF
25V
+3.3V_Normal
C7534
0.1uF
50V
0.1uF
C7548
POWER_ON/OFF2_2
R7569
10K
OPT
R7524
75K
75K
1/8W
1%
+3.5V_Normal
R7500
10K
10K
Adapter
C7556
10uF
10V
10uF
10V
C7551
10uF
25V
10uF
25V
L7507
PANEL_CTL
+5V_Normal
R7528
10
1/10W
1%
+3.5V_ST
C7558
2200pF
+24V/+15V
R7557
9.1K
C7552
10uF
25V
10uF
25V
POWER_ON/OFF2_1
C7557
0.1uF
16V
0.1uF
16V
R7509
10K
10K
R7547
30K
1%
Adapter
R7564
10K
1%
R7523
22K
L7510
3.6uH
3.6uH
NR8040T3R6N
IC7500
MP8706EN-C247-LF-Z
3
SW_2
2
SW_1
4
BST
1
IN
5
EN/SYNC
6
FB
7
VCC
8
GND
R7539
10K
R7560
10K
C7531
4.7uF
4.7uF
16V
C7563
22uF
10V
22uF
10V
C7566
22uF
10V
22uF
10V
R7530-*1
22K
5V_PANEL
R7531-*1
2.7K
5V_PANEL
L7515
CIC21J501NE
C7569
0.1uF
16V
0.1uF
16V
+3.5V_ST
+24V/+15V
OLP
R7517
10K
OPT
+3.3V_Normal
+3.5V_ST
Q7502
2SC3052
2SC3052
E
B
C
R7516
10K
10K
INV_CTL
R7515
10K
10K
A_DIM
PWM_DIM
P7500
SMAW200-12
NON_Adapter
1
+15V
2
+15V
3
GND
4
GND
5
+3.5V_ST
6
+3.5V_ST
7
GND
8
OLP
9
INV_ON
10
P_DIM
11
A_DIM
12
NC
R7511
6.8K
OPT
L7504
MLB-201209-0120P-N2
Adapter
+12V/+15V
C7532
10uF
25V
Adapter
C7537
10uF
25V
Adapter
C7536
3.3uF
50V
3.3uF
50V
Adapter
C7540
3.3uF
50V
3.3uF
50V
Adapter
C7533
0.1uF
50V
0.1uF
50V
Adapter
+24V/+15V
C7545
0.1uF
50V
Adapter
C7522
1uF
50V
1uF
50V
Adapter
R7561
100K
100K
L7509
3.6uH
3.6uH
NR8040T3R6N
Adapter
D7500
MBRA340T3G
Adapter
C7543
0.1uF
50V
0.1uF
50V
Adapter
+24V/+15V
C7527
0.1uF
50V
Adapter
RL_ON
R7529
100K
100K
Adapter
+3.5V_ST
C7542
3.3uF
50V
3.3uF
50V
Adapter
C7538
10uF
10V
10uF
10V
Adapter
R7525
68K
1/16W
5%
Adapter
C7524
220pF
220pF
50V
Adapter
R7537
200K
200K
1/8W
1%
1%
Adapter
C7544
0.1uF
50V
0.1uF
50V
Adapter
R7544
105K
105K
1/10W
1%
1%
Adapter
R7543
30K
1/10W
1%
Adapter
R7538
6.8K
1%
Adapter
R7542
22K
OPT
Q7504
Si4800BDY
Adapter
3
S3
2
S2
4
G
1
S1
5
D5
6
D6
7
D7
8
D8
C7507
1uF
6.3V
OPT
6.3V
OPT
R7505
4.7K
C7506
1uF
6.3V
OPT
6.3V
OPT
C7505
0.01uF
50V
C7500
10uF
25V
10uF
25V
C7518
0.1uF
16V
0.1uF
16V
C7510
100pF
50V
OPT
C7508
1uF
50V
1uF
50V
L7501
3.6uH
3.6uH
NR8040T3R6N
IC7501
MP2212DN
3
IN
2
GND
4
BS
1
FB
5
VCC
6
SW_1
7
SW_2
8
EN/SYNC
C7519
1uF
25V
1uF
25V
Adapter
C7509
0.1uF
0.1uF
16V
NON_Adapter
R7503
22K
22K
C7513
22uF
10V
22uF
10V
C7511
0.1uF
0.1uF
16V
NON_Adapter
L7502
MLB-201209-0120P-N2
NON_Adapter
C7512
100pF
50V
OPT
C7501
0.1uF
50V
0.1uF
50V
C7503
2.2uF
2.2uF
50V
C7504
0.1uF
0.1uF
C7517
68uF
35V
35V
L7503
MLB-201209-0120P-N2
NON_Adapter
C7514
0.1uF
0.1uF
50V
OPC_OUT
R7507
0
OPT
R7506
0
R7508
0
OPT
OPC_OUT
R7571
22
Adapter
C7571
10uF
10V
10uF
10V
Adapter
R7514
1K
1K
R7572
0
NON_Adapter
+12V/+15V
R7570
18K
Adapter
L7505
5V_PANEL
+3.5V_Normal
R7555
10K
10K
C7559
4.7uF
4.7uF
16V
Q7507
2SC3052
2SC3052
E
B
C
C7554
0.01uF
C7568
0.1uF
16V
R7545
10K
10K
POWER_ON/OFF2_2
+3.5V_ST
C7555
0.1uF
R7551
22K
C7561
1uF
25V
25V
C7526
0.1uF
16V
0.1uF
16V
R7578
10K
R7576
10
1%
C7573
100pF
50V
R7574
11K
5%
L7506
R7575
10K
1%
R7577
0
POWER_ON/OFF1
IC7504
MP2212DN
3
IN
2
GND
4
BS
1
FB
5
VCC
6
SW_1
7
SW_2
8
EN/SYNC
C7576
22uF
22uF
10V
C7575
0.1uF
50V
L7516
3.6uH
+1.5V_DDR
+3.5V_ST
C7572
22uF
22uF
10V
C7574
1uF
10V
0.1uF
C7577
R7579
0
Adapter_LGD
ERROR_OUT
R7580
0
OPT
P7501
SM14B-SRSS-TB
Adapter
1
24V
2
24V
3
24V
4
24V
5
24V
6
GND
7
GND
8
GND
9
GND
10
GND
11
NC
12
INV_ON
13
PWM_DIM
14
ERROR_OUT
15
GND
L7517
12V_PANEL
R7540
120K
120K
1%
Adapter
R7581
1.6K
1/8W
1%
Adapter
C7567
0.1uF
16V
0.1uF
16V
C7578
0.1uF
16V
0.1uF
16V
Q7506
AO3407A
G
D
S
Q7508
AO3407A
G
D
S
Q7501
AO3407A
G
D
S
IC7505
AZ2940D-2.5TRE1
2
GND
3
VOUT
1
VIN
C7515
68uF
35V
35V
NON_Adapter
IC7507
AOZ1072AI
3
AGND
2
VIN
4
FB
1
PGND
5
COMP
6
EN
7
LX_1
8
LX_2
R7582
100
100
1%
+3.5V_ST
R7585
100K LIPS
100K LIPS
R7586
100
100
1%
LIPS
R7548-*1
5.6K
1%
LIPS
R7547-*1
18K
1%
LIPS
R7583
1K
1/16W
1%
LIPS
R7584
27K
1/16W
1%
LIPS
C7580
68uF
35V
35V
C7502
0.1uF
50V
50V
IC7509-*1
G691L293T73UF
DEV_Repalcement
1
GND
2
RESET
3
VCC
+5V_USB
RL_ON
R7832
10K
NON_Adapter
C7913
100pF
50V
OPT
R7851
10K
10K
+12V/+15V
R7850
22
22
C7919
0.1uF
16V
0.1uF
16V
C7910
10uF
25V
10uF
25V
R7852
10K
R7853
33K
1%
C7918
0.1uF
16V
0.1uF
16V
C7920
0.1uF
0.1uF
R7854
6.2K
1%
C7915
22uF
10V
22uF
10V
IC7511
MP8706EN-C247-LF-Z
3
SW_2
2
SW_1
4
BST
1
IN
5
EN/SYNC
6
FB
7
VCC
8
GND
L7910
L7911
3.6uH
3.6uH
NR8040T3R6N
C7914
100pF
50V
OPT
C7921
1uF
50V
1uF
50V
POWER_ON/OFF2_2
+5V_General
JK7500
JPD003N-M432-4F
Adapter
GND
SW
24V
IC7503
MP4460DQ-LF-Z
Adapter
3
EN
2
SW_2
4
COMP
1
SW_1
5
FB
6
GND
7
FREQ
8
VIN_1
9
VIN_2
10
BST
11
EP_GND
IC7502
MP8670DN-LF-Z
Adapter
3
VCC
2
BST
4
BG
1
SW
5
GND
6
FB
7
EN/SYNC
8
IN
C7922
0.1uF
50V
0.1uF
50V
C7923
0.1uF
50V
0.1uF
50V
R7556
0
R7530
33K
12V_PANEL
R7531
5.6K
12V_PANEL
L7508
4.7uH
4.7uH
SP-7850_4.7
Adapter
L7912
MLB-201209-0120P-N2
Adapter
+24V_LED
+24V_LED_driver
Q7520
Adapter
E
B
C
RL_ON
R7862
22K
22K
Adapter
+24V_LED_driver
C7924
0.1uF
50V
0.1uF
50V
Adapter
C7925
2.2uF
2.2uF
Adapter
50V
R7860
10K
Adapter
+24V_LED
Q7521
Adapter
AO3407A
G
D
S
C7926
0.01uF
50V
Adapter
R7861
27K
27K
Adapter
R7501
27K
27K
C7927
0.1uF
50V
0.1uF
50V
C7928
0.01uF
50V
0.01uF
50V
IC7509
NCP803SN293
NCP
1
GND
3
VCC
2
RESET
IC7510
NCP803SN293
NCP
1
GND
3
VCC
2
RESET
IC7510-*1
G691L293T73UF
DEV_Repalcement
1
GND
2
RESET
3
VCC
C7933
0.01uF
50V
0.01uF
50V
C7932
3.3uF
50V
R7502
22
22
1/10W
R7519
22
1/10W
5%
Adapter
L7913
CPI2520NHL3R3ME
Adapter
L7914
BLM18PG121SN1D
NON_Adapter
1608
R7587
0
Adapter_AUO
R7549
0
Adapter_AUO
R7541
0
Adapter_LGD
POWER_SMALL
GP2_Saturn7
Ver. 1.00
Power_DET
R2
+5V_Normal
3A
+2.5V
3A
Placed on SMD-TOP
R1
Vout=0.8*(1+R1/R2)
+5V_USB
PANEL_POWER
15V-->3.56V
C IN
Vd=550mV
3A
1934 mA
Vout=(1+R1/R2)*0.8
ST_3.5V-->3.5V --> 3.375V
R2
Placed on SMD-TOP
R1
New item
R1
300 mA
+15V Control
R1
24V-->3.48V
Vout=(1+R1/R2)*0.8
MAX 2000mA
R2
2026 mA
Close to IC
2A
Vout=0.8*(1+R1/R2)
Replaced Part
S7 core 1.26V volt
+3.3V_Normal
MAX 1A
R2
UNDER CHECKING
R1
R2
Placed on SMD-TOP
24V->15V
close to pin
24V->3.5V
$0.37
$0.12
$0.21
92
close to IC7502
Switching noise reducing [MPS recommend]
3.3K -> 1K (threshold voltage up)
4A -> 3A modify 090916
090916
090916
+3.5V_Normal
R1
C IN
Replaced Part
Placed on SMD-TOP
S7 DDR 1.5V
R2
Vout=0.8*(1+R1/R2)
Placed on SMD-TOP
Close to IC
3A
1074 mA
real output : 12.3V
Replacement Item
R1
3A
090916
R2
MAX 300mA
To Tuner
Vout=(1+R1/R2)*0.8
LED Driver Power
AO3407A Vgs : 10.8V
AO3407A Vgs : 10.8V
2A
AO3407A Vgs : 10.8V(24V input)
AO3407A Vgs : 8.3V(15V input)
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