LG 37LK450 / 37LK450A / 37LK450N / 37LK450U / 37LK451 (CHASSIS:LD01M) Service Manual ▷ View 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.
SPI_SCK
+3.5V_ST
Q1401
KRC103S
KRC103S
OPT
E
B
C
+3.5V_ST
C1401
0.1uF
R1404
4.7K
OPT
/SPI_CS
SPI_SDO
IC1401
MX25L8006EM2I-12G
S_FLASH_MAIN_MACRONIX
3
WP#
2
SO/SIO1
4
GND
1
CS#
5
SI/SIO0
6
SCLK
7
HOLD#
8
VCC
R1405
33
33
R1403
10K
OPT
SPI_SDI
/FLASH_WP
R1401
0
OPT
IC1401-*1
W25Q80BVSSIG
S_FLASH_MAIN_WINBOND
3
%WP[IO2]
2
DO[IO1]
4
GND
1
CS
5
DI[IO0]
6
CLK
7
HOLD[IO3]
8
VCC
+3.5V_ST
SFLASH
20110324
13
GP3_S7LR
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.
FE_TS_DATA[1]
FE_TS_DATA[3]
FE_TS_DATA[7]
FE_TS_DATA[5]
FE_TS_DATA[0]
FE_TS_DATA[4]
FE_TS_DATA[6]
FE_TS_DATA[2]
C3727
0.1uF
16V
C3737
100pF
50V
100pF
50V
R3705
0
RF_SW_OPT
R3706
0
FULL_NIM_BR
IF_AGC_MAIN
R3731
0
FULL_NIM
+1.2V/+1.8V_TU
IC3703
AZ1117BH-ADJTRE1
HALF_NIM_1.2V_BCD
2
OUTPUT
3
INPUT
1
ADJ/GND
R3734
0
BOOSTER_OPT
R3732
100
100
R3761
0
HALF_NIM
R3767-*1
0
HALF_NIM_1.8V
R3767
10
HALF_NIM_1.2V
FE_TS_SYNC
TU3701
TDFR-C036D
TDFR-C036D
CN_2INPUT_H_LG3911
1
RF_S/W_CNTL
2
BST_CNTL
3
+B1[+5V]
4
NC[RF_AGC]
5
NC_1
6
SCLT
7
SDAT
8
NC_2
9
SIF
10
NC_3
11
VIDEO
12
GND
13
+B2[1.2V]
14
+B3[3.3V]
15
RESET
16
NC_4
17
SCL
18
SDA
19
ERR
20
SYNC
21
VALID
22
MCL
23
D0
24
D1
25
D2
26
D3
27
D4
28
D5
29
D6
30
D7
31
SHIELD
C3739
10uF
6.3V
10uF
6.3V
CN
Q3702
2SC3052
BOOSTER_OPT
E
B
C
R3758
82
82
R3728
0
FULL_NIM
C3713-*1
20pF
50V
20pF
50V
TU_I2C_FILTER
C3711
18pF
50V
18pF
50V
TU_I2C_NON_FILTER
C3725
0.1uF
16V
16V
Q3701
ISA1530AC1
BOOSTER_OPT
E
B
C
C3708
0.1uF
16V
16V
C3717
0.1uF
16V
R3753
4.7K
4.7K
BUFFER
R3764
0
1/10W
FULL_NIM
+3.3V_TU
R3701
100
FULL_NIM
C3741
10uF
10V
10uF
10V
HALF_NIM
+3.3V_TU
C3726
0.1uF
16V
0.1uF
16V
+5V_TUNER
R3721
0
FULL_NIM
R3770
10K
FULL_NIM_SEMTEK
R3733
100K
C3715
22uF
10V
22uF
10V
C3729
0.1uF
16V
FULL_NIM
TU_SDA
+3.3V_TU
R3729
0
FULL_NIM
R3768
1.2K
1.2K
HALF_NIM_1.2V
R3722
0
FULL_NIM
R3760
0
HALF_NIM
R3724
0
FULL_NIM
C3701
0.1uF
16V
0.1uF
16V
R3736-*1
MLG1005SR27JT
TU_I2C_FILTER
C3710
0.1uF
16V
TU3701-*4
TDFR-C236D
CN_2INPUT_H_ALTO
1
RF_S/W_CNTL
2
BST_CNTL
3
+B1[+5V]
4
NC[RF_AGC]
5
NC_1
6
SCLT
7
SDAT
8
NC_2
9
SIF
10
NC_3
11
VIDEO
12
GND
13
+B2[1.2V]
14
+B3[3.3V]
15
RESET
16
NC_4
17
SCL
18
SDA
19
ERR
20
SYNC
21
VALID
22
MCL
23
D0
24
D1
25
D2
26
D3
27
D4
28
D5
29
D6
30
D7
31
SHIELD
C3742
20pF
50V
20pF
50V
TU_I2C_FILTER
C3731
10uF
10V
10uF
10V
OPT
R3737
2.2K
2.2K
BOOSTER_OPT
R3751
220
BUFFER
RF_SWITCH_CTL
IF_N_MSTAR
L3704
FULL_NIM_BCD
Q3705
ISA1530AC1
BUFFER
E
B
C
Q3703
ISA1530AC1
BUFFER
E
B
C
IF_P_MSTAR
R3735
TU_I2C_NON_FILTER
33
LNA2_CTL
C3703
100pF
50V
100pF
50V
TU3702-*1
TDVJ-H101F
TDVJ-H101F
GP3_ATSC_1INPUT_H_LGIT
14
3.3V
13
1.2V
5
AS
12
GND
11
VIDEO
2
BST_CNTL
10
NC
4
NC[RF_AGC]
1
ANT_PWR[OPT]
17
DIF_1
9
SIF
8
NC(IF_TP)
3
+B
16
IF_AGC_CNTL
7
SDA
6
SCL
15
RESET
18
DIF_2
19
SHIELD
C3730
10uF
10V
10uF
10V
FULL_NIM
C3707
100pF
50V
100pF
50V
R3744
4.7K
FULL_NIM
+5V_TU
+5V_TU
R3743
10K
BOOSTER_OPT
R3749
0
BUFFER
TU3702
TDTJ-S001D
TDTJ-S001D
DVB_1INPUT_H_LGIT
14
3.3V
13
1.2V
5
AS
12
GND
11
VIDEO
2
BST_CNTL
10
NC
4
NC[RF_AGC]
1
ANT_PWR[OPT]
17
DIF_1
9
SIF
8
NC[IF_TP]
3
+B
16
IF_AGC_CNTL
7
SDA
6
SCL
15
RESET
18
DIF_2
19
SHIELD
TU3702-*2
TDTR-T036F
TDTR-T036F
NTSC_2INPUT_H_LGIT
14
+B3[3.3V]
13
+B2[1.2V]
5
NC_2
12
GND
11
VIDEO
2
BST_CTL
10
NC_4
4
NC_1[RF_AGC]
1
RF_S/W_CTL
17
DIF_1[N]
9
SIF
8
NC_3
3
+B1[5V]
16
IF/AGC
7
SDAT
6
SCLT
15
RESET
18
DIF_2[P]
19
SHIELD
C3719
22uF
10V
+5V_TUNER
R3707
0
OPT
C3716
0.1uF
16V
16V
DEMOD_RESET
C3724
0.1uF
16V
+5V_TUNER
FE_TS_VAL_ERR
FE_TS_CLK
R3726
0
FULL_NIM
TU_CVBS
C3722
22uF
16V
22uF
16V
+5V_TUNER
R3723
0
FULL_NIM_CHINA
C3704
0.1uF
16V
16V
C3728
0.1uF
16V
16V
OPT
FE_TS_DATA[0-7]
L3703
MLB-201209-0120P-N2
C3740
0.1uF
16V
HALF_NIM
TU3702-*3
UDA55AL
UDA55AL
GP3_ATSC_1INPUT_H_SANYO
14
+3.3V
13
+1.2V
5
AS
12
GND
11
VIDEO
2
NC_2
10
NC_3
4
NC[RF_AGC]
1
NC_1
17
DIF_1
9
SIF
8
NC(IF_TP)
3
+B[+5V]
16
IF_AGC_CNTL
7
SDA
6
SCL
15
RESET
18
DIF_2
19
SHIELD
R3740-*1
1K
TU_IIC_NON_ATSC_SANYO
L3702
MLB-201209-0120P-N2
+5V_TUNER
C3714
22pF
50V
22pF
50V
FULL_NIM
R3703
150
OPT
OPT
C3738
0.1uF
16V
0.1uF
16V
R3730
0
FULL_NIM
R3766
1
1
1/10W
HALF_NIM
C3723
22uF
10V
22uF
10V
R3754
10K
10K
OPT
Q3704
2SC3052
OPT
E
B
C
TU_SCL
R3752
220
BUFFER
+3.3V_TU
C3712
22pF
50V
22pF
50V
FULL_NIM
+1.2V/+1.8V_TU
TUNER_RESET
+1.2V/+1.8V_TU
IC3703-*1
AP1117EG-13
HALF_NIM_1.2V_DIODES
ADJ/GND
OUT
IN
+3.3V_TU
+3.3V_TU
IF_AGC_SEL
R3735-*1
MLG1005SR27JT
TU_I2C_FILTER
R3748-*1
10K
10K
FULL_NIM_BCD
+5V_TUNER
L3701
BLM18PG121SN1D
BOOSTER_OPT
C3713
18pF
50V
18pF
50V
TU_I2C_NON_FILTER
R3725
0
FULL_NIM_CHINA
C3711-*1
20pF
50V
20pF
50V
TU_I2C_FILTER
R3702
100
FULL_NIM
R3750
1K
OPT
TU3701-*2
TDFR-B036F
FULL_NIM_BR
1
RF_S/W_CNTL
2
BST_CNTL
3
+B1[5V]
4
NC_1[RF_AGC]
5
NC_2
6
SCLT
7
SDAT
8
NC_3
9
SIF
10
NC_4
11
VIDEO
12
GND
13
+B2[1.2V]
14
+B3[3.3V]
15
RESET
16
NC_5
17
SCL
18
SDA
19
ERR
20
SYNC
21
VALID
22
MCL
23
D0
24
D1
25
D2
26
D3
27
D4
28
D5
29
D6
30
D7
31
SHIELD
R3740
1.2K
1.2K
TU_IIC_ATSC_SANYO
R3755
470
BUFFER
C3706
0.1uF
16V
0.1uF
16V
R3745
10K
10K
BOOSTER_OPT
R3769
10K
FULL_NIM_BCD
R3742
4.7K
FULL_NIM
R3727
0
FULL_NIM
C3702
0.1uF
16V
IC3701
AP2132MP-2.5TRG1
FULL_NIM_BCD
3
VIN
2
EN
4
VCTRL
1
PG
5
NC
6
VOUT
7
ADJ
8
GND
9
[EP]
R3736
TU_I2C_NON_FILTER
33
DEMOD_SCL
R3741-*1
1K
TU_IIC_NON_ATSC_SANYO
R3741
1.2K
1.2K
TU_IIC_ATSC_SANYO
+3.3V_TU
C3709
0.01uF
25V
0.01uF
25V
BOOSTER_OPT
R3771
10K
FULL_NIM_BCD
+5V_Normal
R3748
5.1K
FULL_NIM_SEMTEK
+3.3V_TU
DEMOD_SDA
TU3702-*4
TDTJ-S101D
TDTJ-S101D
GP2R_AU_1INPUT_H_LGIT
14
+B3[3.3V]
13
+B2[1.2V]
5
MOPLL_AS
12
GND
11
VIDEO
2
NC_1
10
NC_3
4
RF_AGC
1
ANT_PWR
17
DIF_1[N]
9
SIF
8
NC_2
3
+B1[5V]
16
IF_AGC
7
SDA
6
SCL
15
RESET
18
DIF_2[P]
19
SHIELD
TU_SIF
+3.3V_Normal
+5V_TU
IC3701-*1
SC4215ISTRT
FULL_NIM_SEMTEK
3
VIN
2
EN
4
NC_2
1
NC_1
5
NC_3
6
VO
7
ADJ
8
GND
R3747
9.1K
1005
FULL_NIM
C3743
20pF
50V
20pF
50V
TU_I2C_FILTER
C3705
100uF
16V
16V
FULL_NIM
IC3703-*2
AZ1117BH-1.8TRE1
HALF_NIM_1.8V
1
ADJ/GND
2
OUT
3
IN
R3704
100
HALF_NIM
R3772
0
NON_BUFFER
R3773
0
NON_BUFFER
R3774
0
+3.3V_BUFFER
R3775
0
+5V_BUFFER
R3776
0
+3.3V_BUFFER
R3777
0
+5V_BUFFER
+5V_TU
+5V_TU
TU3700
TDSS-G101D
TDSS-G101D
SI2176_DVB_1INPUT_H
5
+3.3V
11
DIF[N]
2
RESET
10
DIF[P]
4
SDA
1
NC
9
IF_AGC
8
CVBS
3
SCL
7
+1.8V
6
SIF
12
SHIELD
TU3700-*1
TDSS-H101F
TDSS-H101F
SI2176_ATSC_1INPUT_H
5
+B1[3.3V]
11
DIF[N]
2
RESET
10
DIF[P]
4
SDA
1
NC
9
IF_AGC
8
CVBS
3
SCL
7
+B2[1.8V]
6
SIF
12
SHIELD
TUNER_L
20110511
14
GP3_S7LR
GPIO must be added.
R1
Please, check Multi Item! 10/12
BOOSTER : CHINA OPT
OPTION : RF AGC
FE_AGC_SPEED_CTL
GP4R_GLOBAL_TUNER_BLOCK
Close to the CI Slot
1. should be guarded by ground
2. No via on both of them
3. Signal Width >= 12mils
Signal to Signal Width = 12mils
Ground Width >= 24mils
2. No via on both of them
3. Signal Width >= 12mils
Signal to Signal Width = 12mils
Ground Width >= 24mils
should be guarded by ground
close to TUNER
This was being applied to the only china demod,
so this has to be deleted in both main and ISDB sheet.
so this has to be deleted in both main and ISDB sheet.
200mA
add,0929
R1
Size change,0929
location movement,0929
Pull-up can’t be applied
because of MODEL_OPT_2
because of MODEL_OPT_2
R2
close to TUNER
Vo=0.8*(1+R1/R2)
close to IF line
TUNER MULTI-OPTION
close to the tuner pin, add,09029
R2
380mA
Close to the tuner
Size change,0929
FE_BOOSTER_CTL
60mA
The pull-up/down of LNA2_CTL
is depended on MODLE_OPT_1.
GPIO must be added for FE_BOOSTER_CTL
is depended on MODLE_OPT_1.
GPIO must be added for FE_BOOSTER_CTL
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.
0.1uF
C501
50V
0.1uF
C521
50V
C528
1uF
25V
1uF
25V
0.1uF
C537
50V
+24V_AMP
0.1uF
C519
50V
+24V_AMP
SPK_L-
0.1uF
C514
16V
C533
390pF
50V
0.1uF
C513
16V
C516
1000pF
50V
AMP_SCL
R503
100
R515
12
+24V_AMP
0.1uF
C540
50V
R514
12
R501
10K
L506
10.0uH
10.0uH
R502
10K
P501
WAFER-ANGLE
1
2
3
4
C536
0.47uF
50V
D504
100V
1N4148W
OPT
R512
12
C526
22000pF
22000pF
50V
0.1uF
C522
50V
SPK_L+
AUD_MASTER_CLK
AMP_RESET
C530
390pF
50V
L502
BLM18PG121SN1D
R509
12
C507
33pF
50V
33pF
50V
SPK_L-
C523
10uF
35V
10uF
35V
IC501
NTP-7400L
1
AGND_PLL
2
AVDD_PLL
3
DVDD_PLL
4
LF
5
DGND_PLL
6
GND_1
7
DGND
8
DVDD
9
SDATA
10
WCK
11
BCK
12
SDA
13
SCL
14
/FAULT
15
MONITOR0
16
MONITOR1
17
MONITOR2
18
BST2B
19
PGND2B
20
OUT2B_1
21
OUT2B_2
22
PVDD2_1
23
PVDD2_2
24
PVDD2_3
25
OUT2A_1
26
OUT2A_2
27
PGND2A
28
BST2A
29
VDR2
30
GND_2
31
VCC_5
32
VDR1
33
BST1B
34
PGND1B
35
OUT1B_1
36
OUT1B_2
37
PVDD1_1
38
PVDD1_2
39
PVDD1_3
40
OUT1A_1
41
OUT1A_2
42
PGND1A
43
BST1A
44
/RESET
45
AD
46
GND_IO
47
CLK_I
48
VDD_IO
49
[EP]
R519
4.7K
0.1uF
C520
50V
Q501
2SC3052
E
B
C
C535
0.47uF
50V
R505
3.3K
L505
10.0uH
10.0uH
D502
100V
1N4148W
OPT
R508
12
D503
100V
1N4148W
OPT
R517
4.7K
L504
10.0uH
10.0uH
R511
12
R506
100
C529
1uF
25V
25V
R516
4.7K
SPK_L+
0.1uF
C502
50V
C517
22000pF
50V
SPK_R-
+24V
C525
0.01uF
50V
0.01uF
50V
OPT
C518
22000pF
50V
C512
0.1uF
16V
AUD_LRCK
C511
10uF
10uF
10V
OPT
C534
1uF
25V
1uF
25V
0.1uF
C538
50V
C531
390pF
50V
L503
10.0uH
10.0uH
C505
1000pF
50V
L501
MLB-201209-0120P-N2
C524
10uF
35V
C527
22000pF
50V
22000pF
50V
0.1uF
C539
50V
+3.5V_ST
SPK_R+
C509
33pF
50V
33pF
50V
AMP_MUTE
C503
100pF
50V
D501
100V
1N4148W
OPT
AMP_SDA
0.1uF
C508
16V
C515
10uF
10V
10uF
10V
C506
10uF
10V
OPT
SPK_R+
+3.3V_Normal
C532
390pF
50V
AUD_LRCH
R513
12
AUD_SCK
R507
3.3
3.3
OPT
SPK_R-
C504
1000pF
50V
C510
10uF
10V
OPT
R504
100
R510
12
R518
4.7K
R520
10K
R521
10K
NTP7400
20110324
16
GP3_S7LR
SPEAKER_L
SPEAKER_R
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