LG 42LD450 Service Manual page 34

NON_Adapter
P7500
SMAW200-12
+15V
1
+15V
2
GND
3
GND
4
+3.5V_ST
5
+3.5V_ST
6
GND
7
OLP
8
INV_ON
9
P_DIM
10
C7507
R7505 1uF
A_DIM 4.7K A_DIM
6.3V
11
OPT
C7506
NC
1uF
12
6.3V
OPT
Adapter
JK7500
JPD003N-M432-4F
24V
SW
C7580
C7502
68uF
0.1uF
35V
50V
GND
+24V_LED_driver
Adapter
P7501
SM14B-SRSS-TB
24V
1
C7927
C7928
0.1uF
24V 0.01uF
2
50V
50V
24V
3
24V
4
24V
5
GND
6
GND
7
GND
8
GND
9
GND
10
Adapter_AUO
R7587
NC
11
0
INV_ON
12
R7541 0
PWM_DIM
13
Adapter_LGD
R7579
ERROR_OUT
14
0
15 Adapter_LGD
R7580
GND
R7549
0
OPT
0
Adapter_AUO
+12V/+15V To Tuner
IC7511
MP8706EN-C247-LF-Z
IN GND
1 8
C7921
1uF
SW_1 VCC
50V
2 7
C7910
10uF 3A R7851
25V SW_2 FB 10K
3 6
C7920
0.1uF
POWER_ON/OFF2_2
BST EN/SYNC
4 5
R7850 R7852
22 10K
L7911
3.6uH
NR8040T3R6N
Vout=(1+R1/R2)*0.8
+12V/+15V +5V_USB
IC7500
MP8706EN-C247-LF-Z
IN GND
1 8
C7508
1uF
SW_1 VCC
2 7 50V
C7500
10uF
3A R7509
SW_2 FB 10K
25V
3 6
C7504
0.1uF
POWER_ON/OFF2_1
BST EN/SYNC
4 5
R7502 R7510
22 1/10W 10K
L7501
3.6uH
NR8040T3R6N
Vout=(1+R1/R2)*0.8
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.
Copyright © 2010 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
+5V_Normal
+24V_LED 5V_PANEL
+24V/+15V
MLB-201209-0120P-N2 Adapter L7504
Adapter
L7503 L7912
MLB-201209-0120P-N2 MLB-201209-0120P-N2
4A -> 3A modify 090916
C7514 C7517
NON_Adapter
0.1uF 68uF
50V 35V
+3.5V_ST
L7502
MLB-201209-0120P-N2
NON_Adapter NON_Adapter
C7509 NON_Adapter C7511
C7515
0.1uF 0.1uF
68uF
16V
16V
35V
NON_Adapter
PANEL_CTL
OLP
R7506 PWM_DIM
0 +3.3V_Normal
3.3K -> 1K (threshold voltage up)
+3.5V_ST
OPC_OUT
0 R7507 R7514
1K
OPT
OPC_OUT R7516
0 R7508
10K
OPT
C
R7511 R7515
INV_CTL
10K
B
6.8K
OPT
Q7502
E 2SC3052
R7517
10K
OPT
Placed on SMD-TOP
C IN
+24V/+15V
AO3407A Vgs : 10.8V(24V input)
AO3407A Vgs : 8.3V(15V input)
C7501
0.1uF
50V
ERROR_OUT
R7500
10K
Adapter
POWER_ON/OFF2_2
R7832
10K
NON_Adapter
RL_ON
+5V_General
MAX 300mA
+15V Control
OPT
+3.5V_Normal
C7913
OPT
100pF
C7914
50V
100pF C7915 C7918 C7919
R1 22uF
50V 0.1uF 0.1uF
10V 16V 16V
C7553
0.1uF
090916 16V
R2
+5V_USB
MAX 2000mA
OPT
C7510
OPT
100pF
C7512
50V
100pF C7513
C7516 C7518
R1
22uF 0.1uF 0.1uF
50V
10V
16V 16V
090916
R2
C IN
+12V/+15V
PANEL_POWER
12V_PANEL
C7525 C7526 C7529
10uF
0.01uF 0.1uF
16V
25V 16V
Q7506
OPT
AO3407A
New item
5V_PANEL
R7530 C7531
R7530-*1
33K 4.7uF G
22K
R7523
12V_PANEL 16V
22K
C7541
5V_PANEL
R7531
1uF
R7531-*1
5.6K 25V
2.7K 12V_PANEL
OPT OPT
C
R7522
10K
B Q7505
2SC3052
C
R7521
E
R7527
10K B Q7503
22K
2SC3052
E
S7 DDR 1.5V
+3.5V_ST
Replaced Part
R1
R7575
L7506
10K 1%
IC7504
MP2212DN
Close to IC
10K
FB EN/SYNC R7578
1 8 POWER_ON/OFF1
R7574
R2
11K L7516
GND SW_2
5% 2 3A 7
3.6uH
IN SW_1
3 6
BS VCC
4 5 C7575
C7572
22uF 0.1uF
50V
10V
R7577 0
R7576
10
C7574
1% 1uF
10V
+3.5V_ST
AMP_VCC +12V/+15V
C7503 R7503
2.2uF 22K
C7555
50V C7554
0.1uF
0.01uF
S
G
L7913
R7501
CPI2520NHL3R3ME
27K Q7501
R7572
Adapter
D
AO3407A 0
C NON_Adapter
L7914
BLM18PG121SN1D
B
R7545
Q7500
NON_Adapter 10K
B
C7505
1608 2A
E
0.01uF C7933
50V POWER_ON/OFF2_2
C7932 0.01uF
R7551
3.3uF 50V 22K
50V
AO3407A Vgs : 10.8V
+3.5V_Normal
+24V_LED
+2.5V
C7925
2.2uF
IC7505
50V
+2.5V_Normal C7924 Adapter
AZ2940D-2.5TRE1
0.1uF
50V
VIN VOUT
1 3 Adapter
Vd=550mV R7861
27K Q7521
2 Adapter
Adapter
AO3407A
GND
R7860
10K C
B
Adapter
RL_ON Q7520
C7556 C7557
Adapter
10uF 0.1uF
E
300 mA 10V 16V
S7 core 1.26V volt
Replaced Part
+3.5V_ST
R1
Vout=0.8*(1+R1/R2)
R7533
R7536
22K 1% 24K 1%
IC7501
L7507
MP2212DN
Close to IC
10K
FB EN/SYNC R7539
1 8
R7524
75K L7510
R2
1/8W 3.6uH
GND SW_2
1% 2 3A 7
NR8040T3R6N
IN SW_1
3 6
BS VCC
4 5 C7534
C7520
0.1uF
22uF
50V
10V
R7532
Placed on SMD-TOP
R7528 0
C7530
10
1/10W 1uF
1% 10V
24V-->3.48V
15V-->3.56V
ST_3.5V-->3.5V --> 3.375V
IC7509-*1
G691L293T73UF
VCC RESET
3 2
1
GND
DEV_Repalcement
PANEL_VCC
IC7510-*1
G691L293T73UF
VCC RESET
3 2
1
C7547
GND
0.1uF
16V DEV_Repalcement
Power_DET
1074 mA
Vout=0.8*(1+R1/R2)
+1.5V_DDR
Adapter
C7522
1uF
50V
Adapter
Adapter
Q7504
Si4800BDY
C7519
1uF S1
1
25V
S2
2
$0.12
S3
3
G
4
close to IC7502
C7576
C7577
22uF 0.1uF
10V
Placed on SMD-TOP
MBRA340T3G
close to pin
Adapter
+3.5V_Normal
Q7508
AO3407A
Adapter
C7559
R7555
4.7uF
10K G
16V
C7561
1uF
R7556
25V
0
C
C7568
Q7507
0.1uF
2SC3052
16V
E
+3.3V_Normal
+12V/+15V
+24V_LED_driver
R7862
22K
Adapter
S
L7511 PGND
G
VIN
D
C7923
0.1uF
AO3407A Vgs : 10.8V AGND
50V
Adapter
C7549 C7551
C7926 10uF
10uF FB
0.01uF
25V 25V
50V
LED Driver Power
+1.26V_VDDC
+12V/+15V
POWER_ON/OFF2_1
C7546
C7548
22uF 0.1uF
C7550 C7552
10V
10uF 10uF
25V 25V
Placed on SMD-TOP
2026 mA Vout=0.8*(1+R1/R2)
+24V/+15V
+3.5V_ST
R7561
100K
IC7509
NCP803SN293
1%
R7582
POWER_DET
100
VCC RESET
3 2
1
GND
NCP
R7585
+3.5V_ST
100K LIPS
IC7510
LIPS
NCP803SN293
1%
R7586
100
VCC RESET
3 2
1
GND
NCP
UNDER CHECKING
Replacement Item
+24V/+15V
24V->15V
IC7502
Adapter Adapter
MP8670DN-LF-Z Adapter
C7536 C7540
C7533
0.1uF 3.3uF 3.3uF
50V 50V 50V
SW IN
1 8 +12V/+15V
Adapter
090916
real output : 12.3V
BST EN/SYNC
2 7
RL_ON
Adapter
$0.37
R7540
R1
VCC FB 120K
3 6
1%
R2
BG GND
4 5
D8
8
D7
7
D6
6
D5 Adapter
5
L7508 Placed on SMD-TOP
4.7uH
Adapter Adapter
Adapter
SP-7850_4.7 C7532 C7537
C7545
10uF 10uF
0.1uF
25V 25V
50V
Adapter
R7529
100K 24V->3.5V
Adapter
C7527
0.1uF
50V Switching noise reducing [MPS recommend]
IC7503
MP4460DQ-LF-Z +24V/+15V
EP_GND
SW_1 BST
1 10
SW_2 VIN_2
2 9
Adapter
D7500
Adapter C7542 C7544
EN VIN_1 3.3uF
0.1uF +3.5V_ST
3 8 Adapter
Adapter 50V 50V
R7537
COMP FREQ 200K
$0.21
4 7
C7524 Adapter
1/8W
220pF R7544
FB GND 1%
50V 5 6 105K
1/10W
1%
Adapter
L7509
3.6uH
Adapter
Adapter Adapter
C7538 C7571 C7543
NR8040T3R6N
10uF 0.1uF
10uF
10V
10V 50V
+3.3V_Normal
IC7506
1934 mA
AOZ1073AIL
L7515
L7513
CIC21J501NE
3.6uH
LX_2
1 8
NR8040T3R6N
LX_1
2 7
3A
POWER_ON/OFF2_2
EN C7563 C7567
3 6 R1
22uF 0.1uF
R7558
10V 16V
10K
COMP
4 5
OPT
9.1K C7562
2200pF
R7557 100pF
C7558
50V
R2
Vout=(1+R1/R2)*0.8
+5V_Normal
MAX 1A
IC7507
AOZ1072AI
L7514
3.6uH
PGND LX_2
1 8
NR8040T3R6N
VIN LX_1
2 7
C7922
0.1uF 2A
POWER_ON/OFF2_2
AGND EN
50V C7566 C7578
3 6 R1
22uF 0.1uF
R7560
10V
10K 16V
FB COMP
4 5
12K C7565
2200pF
R7559 100pF
C7560
50V
R2
GP2_Saturn7
Ver. 1.00
92
POWER_SMALL
LGE Internal Use Only
C7569
0.1uF
16V
+5V_Normal
C7570
0.1uF
16V