LG 37LD450 Service Manual page 20
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Also See for 37LD450:
- Specifications (2 pages) ,
- Owner's manual (220 pages) ,
- Service manual (43 pages)
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FROM LIPS & POWER B/D
+3.5V_ST
RT1P141C-T112
Q402
R406
1
3
4.7K
NORMAL_EXPEPT_32
NORMAL_32
C
R401
P403
2
10K
FW20020-24S
RL_ON
B
Q401
2SC3052
E
PWR ON
1
1
1
2
2
2
24V
3
3
3
4
4
4
GND
+3.5V_ST
5
5
5
6
6
6
L404
GND
MLB-201209-0120P-N2
7
7
7
8
8
8
3.5V
9
9
9
10
10
10
3.5V
11
11
11
12
12
12
C401
C406
C408
GND
13
13
13
14
14
14
100uF
0.1uF
0.1uF
16V
GND
16V
16V
15
15
15
16
16
16
12V
17
17
17
18
18
18
12V
19
19
19
20
20
20
+12V/+15V
12V
21
21
21
22
22
22
L402
GND/P.DIM2
23
23
23
24
24
24
MLB-201209-0120P-N2
C404
C407
C402
25
25
0.1uF
100uF
0.1uF
16V
SLIM_32~52
P401
SMAW200-H24S2
<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
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.
+12V/+15V
P404
FM20020-24
+24V
L407
24V
MLB-201209-0120P-N2
24V
GND
C418
C426
GND
0.1uF
68uF
3.5V
50V
35V
3.5V
POWER_16_V_SYNC
PANEL_CTL
GND
R477
0
GND/V-sync
1:AK10
V_SYNC
INV ON
A.DIM
+3.3V_Normal
P.DIM1
Err OUT
+3.5V_ST
R419
+3.5V_ST
1K
POWER_18_INV_CTL
R415
100
R426
OPT
10K
R425
100
C
R418
R421
POWER_24_INV_CTL
INV_CTL
B
10K
6.8K
OPT
Q405
E
2SC3052
R427
10K
POWER_18_A_DIM
OPT
0
R451
POWER_22_A_DIM
R485
0
POWER_20_A_DIM
A_DIM
0
R453
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
100
C461
C IN
22uF
POWER_24_ERROR_OUT
ERROR_OUT
10V
R420
100
+3.5V_ST
+5V_USB
MAX 2000mA
OPT
C414
C482
1uF
OPT
100pF
50V
C429
50V
100pF
C420
C424
C428
R410
R1
22uF
0.1uF
0.1uF
10K
50V
10V
16V
16V
POWER_ON/OFF2_1
R411
Placed on SMD-TOP
10K
R2
C430
C IN
22uF
10V
+5V_USB
PANEL_POWER
C442
C438
C436
10uF
0.1uF
New item
0.01uF
16V
16V
25V
OPT
Q409
AO3407A
C443
4.7uF
G
16V
R431
C451
22K
1uF
25V
OPT
OPT
C
R430
10K
B
Q407
2SC3052
C
R429
E
R435
47K
B
Q406
22K
2SC3052
E
S7M DDR 1.5V
CIC21J501NE
L420
Replaced Part
R1
R457
10K
IC407
1%
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
C472
22uF
10V
BS
VCC
C467
4
5
0.1uF
Placed on SMD-TOP
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
3
Vd=550mV
2
GND
C432
0.1uF
16V
C403
C440
10uF
0.1uF
10V
16V
S7M core 1.26V volt
L413
Replaced Part
Vout=0.8*(1+R1/R2)
R1
R442
R444
22K 1%
IC403
24K 1%
MP2212DN
Close to IC
10K
R445
FB
EN/SYNC
1
8
R432
75K
L415
R2
1/8W
3.6uH
GND
SW_2
1%
2
7
3A
NR8040T3R6N
IN
SW_1
3
6
C453
22uF
10V
BS
VCC
4
5
C448
0.1uF
50V
R441
0
R436
10
C444
1/10W
1uF
1%
10V
15V-->3.6V
20V-->3.5V
+24V
+12V/+15V
24V-->3.48V
12V-->3.58V
ST_3.5V-->3.5V -> 3.375V
PANEL_VCC
+24V
POWER_+20V
POWER_+24V
R407
R405
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
AOZ1073AIL
Vout=0.8*(1+R1/R2)
PGND
+1.5V_DDR
1
VIN
2
AGND
3
C457
C459
10uF
10uF
FB
4
25V
25V
POWER_ON/OFF1
C476
0.1uF
Vout=(1+R1/R2)*0.8
+5V_Normal
+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
C411
C409
C456
C486
330uF
22uF
0.1uF
0.1uF
4V
10V
OPT
OPT
Placed on SMD-TOP
GP2_Saturn7M
+3.5V_ST
+3.5V_ST -> 3.375V
+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
100
VCC
RESET
3
2
1
GND
PD_+12V
Power_DET
+3.3V_Normal
IC405
1934 mA
L424
L421
CIC21J501NE
3.6uH
LX_2
8
NR8040T3R6N
LX_1
7
3A
POWER_ON/OFF2_2
EN
C485
C469
C473
6
R1
0.1uF
22uF
0.1uF
R456
10V
16V
16V
10K
COMP
5
OPT
9.1K
C423
2200pF
R454
100pF
C464
50V
R2
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
C477
3
6
R1
22uF
0.1uF
R459
10V
16V
10K
FB
COMP
4
5
OPT
12K
C427
2200pF
R458
100pF
C466
50V
R2
+1.5V_FRC_DDR
+1.5V_DDR_FRC
Ver. 1.2
4
POWER
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