LG 42LD450 Service Manual page 21
Lcd tv chassis : ld01b
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Also See for 42LD450:
- Service manual (42 pages) ,
- Owner's manual (220 pages) ,
- Specifications (2 pages)
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FROM LIPS & POWER B/D
+3.5V_ST
RT1P141C-T112
Q402
R406
1
3
4.7K
NORMAL_EXPEPT_32
C
R401
P403
2
10K
FW20020-24S
RL_ON
B
Q401
2SC3052
E
PWR ON
1
1
1
24V
3
3
3
GND
+3.5V_ST
5
5
5
L404
GND
7
7
7
MLB-201209-0120P-N2
3.5V
9
9
9
3.5V
11
11
11
C401
C406
C408
GND
100uF
13
13
13
0.1uF
0.1uF
16V
GND
16V
16V
15
15
15
12V
17
17
17
12V
19
19
19
+12V/+15V
12V
21
21
21
L402
GND/P.DIM2
23
23
23
MLB-201209-0120P-N2
C404
C407
C402
25
25
0.1uF
0.1uF
100uF
16V
16V
16V
<OS MODULE PIN MAP>
AUO
PIN No
LGD
CMO(09)
SHARP
L_DIM
INV_ON
INV_ON
A-DIM
INV_ON
18
20
VBR-A
NC
Err_out
Err_out
SCLK
NC
22
PWM_DIM
PWM_DIM
PWM_DIM
Err_out
INV_ON
PWM_DIM
24
GND
23
MOSIN
OLP
+5V_USB
+12V/+15V
IC401
MP8706EN-C247-LF-Z
IN
GND
1
8
SW_1
VCC
2
7
C405
3A
10uF
SW_2
FB
25V
3
6
C410
0.1uF
BST
EN/SYNC
4
5
R487
22
L406
3.6uH
NR8040T3R6N
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
NORMAL_32
P404
FM20020-24
+24V
L407
24V
2
2
2
MLB-201209-0120P-N2
24V
4
4
4
GND
6
6
6
C418
C426
GND
8
8
8
0.1uF
68uF
50V
3.5V
35V
10
10
10
3.5V
12
12
12
POWER_16_V_SYNC
PANEL_CTL
GND
14
14
14
R477
GND/V-sync
0
1:AK10
16
16
16
V_SYNC
INV ON
18
18
18
A.DIM
20
20
20
+3.3V_Normal
P.DIM1
22
22
22
Err OUT
24
24
24
+3.5V_ST
R419
POWER_18_INV_CTL
1K
R415
100
R426
OPT
10K
SLIM_32~52
R425
P401
100
C
SMAW200-H24S2
R418
R421
POWER_24_INV_CTL
10K
INV_CTL
B
6.8K
OPT
Q405
2SC3052
E
R427
10K
POWER_18_A_DIM
OPT
0
R451
POWER_22_A_DIM
R485
0
A_DIM
POWER_20_A_DIM
R453
0
POWER_20_PWM_DIM
POWER_24_PWM_DIM
R484
PWM_DIM
R479
0
R472
0
0
R471
0
POWER_22_PWM_DIM
OPT
C416
SCAN_BLK1/OPC_OUT
OPT
C419
R422
0
0.1uF
1uF
OPT
16V
25V
OPT
OPC_OUT
0
R470
Placed on SMD-TOP
+3.3V_Normal
POWER_20_ERROR_OUT
R437
0
C IN
POWER_24_ERROR_OUT
ERROR_OUT
R420
0
+5V_USB
MAX 2000mA
OPT
C414
C482
1uF
OPT
100pF
50V
50V
C429
C420
C424
C428
100pF
R410
R1
22uF
0.1uF
0.1uF
50V
10K
10V
16V
16V
POWER_ON/OFF2_1
R411
Placed on SMD-TOP
10K
R2
C IN
+5V_USB
Vout=(1+R1/R2)*0.8
+12V/+15V
C442
C438
C436
10uF
0.1uF
New item
0.01uF
16V
16V
25V
OPT
Q409
AO3407A
C443
4.7uF
G
16V
R431
C451
1uF
22K
25V
OPT
OPT
C
R430
10K
B
Q407
2SC3052
C
E
R429
R435
47K
B
Q406
22K
2SC3052
E
S7M DDR 1.5V
+3.5V_ST
CIC21J501NE
L420
Replaced Part
R1
R457
10K
1%
IC407
MP2212DN
Close to IC
10K
R464
FB
EN/SYNC
1
8
R449
11K
L423
R2
1/10W
3.6uH
GND
SW_2
5%
2
7
3A
NR8040T3R6N
IN
SW_1
3
6
BS
VCC
C467
4
5
C461
0.1uF
22uF
10V
50V
R455
0
R452
10
C465
1/10W
1uF
1%
10V
+2.5V/+1.8V
+3.3V_Normal
IC402
+2.5V_Normal
AZ2940D-2.5TRE1
VIN
VOUT
1
Vd=550mV
3
2
GND
C432
0.1uF
16V
C403
C440
10uF
0.1uF
10V
16V
S7M core 1.26V volt
+3.5V_ST
L413
Replaced Part
Vout=0.8*(1+R1/R2)
R1
R442
R444
22K 1%
24K 1%
IC403
MP2212DN
Close to IC
10K
FB
EN/SYNC
R445
1
8
R432
75K
L415
R2
1/8W
3.6uH
GND
SW_2
1%
2
7
3A
NR8040T3R6N
IN
SW_1
3
6
BS
VCC
4
5
C448
C430
0.1uF
22uF
10V
50V
R441
0
R436
10
C444
1/10W
1uF
1%
10V
15V-->3.6V
20V-->3.5V
+24V
PANEL_POWER
24V-->3.48V
12V-->3.58V
ST_3.5V-->3.5V -> 3.375V
PANEL_VCC
+24V
POWER_+20V
POWER_+24V
R405
R407
C455
2.2K
2.2K
0.1uF
POWER_+24V
16V
POWER_+20V
PANEL_DISCHARGE_RES
PANEL_DISCHARGE_RES
+3.3V_Normal
1074 mA
+12V/+15V
Vout=0.8*(1+R1/R2)
PGND
+1.5V_DDR
VIN
AGND
C457
C459
10uF
10uF
FB
25V
25V
POWER_ON/OFF1
C472
C476
22uF
0.1uF
10V
Vout=(1+R1/R2)*0.8
Placed on SMD-TOP
+12V/+15V
300 mA
C458
C460
10uF
10uF
25V
25V
Vout=0.8*(1+R1/R2)
+1.5V_DDR
Q408
AO3438
FRC
OPT
C435
4.7uF
10V
POWER_ON/OFF2_1
2026 mA
+1.26V_VDDC
POWER_ON/OFF2_1
C453
C456
C486
22uF
0.1uF
0.1uF
10V
Placed on SMD-TOP
+3.5V_ST -> 3.375V
+12V/+15V
+3.5V_ST
+3.5V_ST
R488
100K
IC408
NCP803SN293
R402
POWER_DET
100
VCC
RESET
3
2
1
C474
GND
0.1uF
R404
PD_+12V
100K
IC409
NCP803SN293
PD_+12V
R480
VCC
RESET
100
3
2
1
GND
PD_+12V
Power_DET
+3.3V_Normal
IC405
1934 mA
AOZ1073AIL
L424
L421
CIC21J501NE
3.6uH
LX_2
1
8
NR8040T3R6N
LX_1
2
7
3A
POWER_ON/OFF2_2
EN
C469
C473
3
6
R1
22uF
0.1uF
R456
10V
16V
10K
COMP
4
5
OPT
9.1K
C423
2200pF
R454
100pF
C464
50V
R2
+5V_Normal
MAX 1A
+5V_Normal
IC406
AOZ1072AI
L422
3.6uH
PGND
LX_2
1
8
NR8040T3R6N
VIN
LX_1
2
7
2A
POWER_ON/OFF2_2
AGND
EN
C471
3
6
R1
22uF
R459
10V
10K
FB
COMP
4
5
OPT
12K
C427
2200pF
R458
100pF
C466
50V
R2
+1.5V_FRC_DDR
+1.5V_DDR_FRC
GP2_Saturn7M
Ver. 1.2
4
POWER
LGE Internal Use Only
C485
0.1uF
16V
C477
0.1uF
16V
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