LG 32LK457C (CHASSIS:LB0EC) 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
KRC103S
Q1401
OPT
E
B
C
+3.5V_ST
0 . 1 u F
C1401
4.7K
R1404
OPT
/SPI_CS
SPI_SDO
MX25L8006EM2I-12G
IC1401
S_FLASH_MAIN_MACRONIX
3
WP#
2
SO/SIO1
4
GND
1
CS#
5
S I / S I O 0
6
SCLK
7
HOLD#
8
VCC
33
R1405
10K
R1403
OPT
SPI_SDI
/FLASH_WP
0
OPT
R1401
W25Q80BVSSIG
IC1401-*1
S_FLASH_MAIN_WINBOND
3
%WP[IO2]
2
DO[IO1]
4
GND
1
CS
5
D I [ I O 0 ]
6
CLK
7
HOLD[IO3]
8
VCC
+3.5V_ST
SFLASH
20110324
13
GP3_S7LR
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 . 1 u F
16V
C3727
100pF
50V
50V
C3737
0
RF_SW_OPT
R3705
0
FULL_NIM_BR R3706
IF_AGC_MAIN
0
FULL_NIM
R3731
+1.2V/+1.8V_TU
AZ1117BH-ADJTRE1
IC3703
HALF_NIM_1.2V_BCD
2
OUTPUT
3
INPUT
1
ADJ/GND
0
R3734
BOOSTER_OPT
100
R3732
0
R3761
HALF_NIM
0
HALF_NIM_1.8V
R3767-*1
10
R3767
HALF_NIM_1.2V
FE_TS_SYNC
TDFR-C036D
CN_2INPUT_H_LG3911
TU3701
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
S I F
10
NC_3
11
VIDEO
12
GND
13
+ B 2 [ 1 . 2 V ]
14
+ B 3 [ 3 . 3 V ]
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
10uF
6.3V
6.3V
C3739
CN
2SC3052
Q3702
BOOSTER_OPT
E
B
C
82
R3758
0
FULL_NIM
R3728
20pF
50V
50V
C3713-*1
TU_I2C_FILTER
18pF
50V
50V
C3711
TU_I2C_NON_FILTER
0 . 1 u F
16V
C3725
ISA1530AC1
Q3701
BOOSTER_OPT
E
B
C
0 . 1 u F
16V
C3708
0 . 1 u F
16V
C3717
4.7K
R3753
BUFFER
1/10W
0
FULL_NIM
R3764
+3.3V_TU
100
FULL_NIM
R3701
10uF
10V
10V
C3741
HALF_NIM
+3.3V_TU
0 . 1 u F
16V
16V
C3726
+5V_TUNER
0
FULL_NIM
R3721
10K
FULL_NIM_SEMTEK
R3770
100K
R3733
22uF
10V
10V
C3715
0 . 1 u F
16V
C3729
FULL_NIM
TU_SDA
+3.3V_TU
0
FULL_NIM
R3729
1.2K
R3768
HALF_NIM_1.2V
0
FULL_NIM
R3722
0
R3760
HALF_NIM
0
FULL_NIM
R3724
0 . 1 u F
16V
16V
C3701
MLG1005SR27JT
R3736-*1
TU_I2C_FILTER
0 . 1 u F
16V
C3710
TDFR-C236D
CN_2INPUT_H_ALTO
TU3701-*4
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
S I F
10
NC_3
11
VIDEO
12
GND
13
+ B 2 [ 1 . 2 V ]
14
+ B 3 [ 3 . 3 V ]
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
20pF
50V
50V
C3742
TU_I2C_FILTER
10uF
10V
10V
OPT
C3731
2.2K
R3737
BOOSTER_OPT
220
R3751
BUFFER
RF_SWITCH_CTL
IF_N_MSTAR
FULL_NIM_BCD
L3704
ISA1530AC1
Q3705
BUFFER
E
B
C
ISA1530AC1
Q3703
BUFFER
E
B
C
IF_P_MSTAR
33
R3735
TU_I2C_NON_FILTER
LNA2_CTL
100pF
50V
50V
C3703
TDVJ-H101F
TU3702-*1
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
S I F
8
NC(IF_TP)
3
+B
16
IF_AGC_CNTL
7
SDA
6
SCL
15
RESET
18
DIF_2
SHIELD
19
10uF
10V
10V
C3730
FULL_NIM
100pF
50V
50V
C3707
4.7K
FULL_NIM
R3744
+5V_TU
+5V_TU
10K
R3743
BOOSTER_OPT
0
R3749
BUFFER
TDTJ-S001D
DVB_1INPUT_H_LGIT
TU3702
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
S I F
8
NC[IF_TP]
3
+B
16
IF_AGC_CNTL
7
SDA
6
SCL
15
RESET
18
DIF_2
SHIELD
19
TDTR-T036F
NTSC_2INPUT_H_LGIT
TU3702-*2
14
+ B 3 [ 3 . 3 V ]
13
+ B 2 [ 1 . 2 V ]
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
S I F
8
NC_3
3
+B1[5V]
16
IF/AGC
7
SDAT
6
SCLT
15
RESET
18
D I F _ 2 [ P ]
SHIELD
19
22uF
10V
C3719
+5V_TUNER
0
OPT
R3707
0 . 1 u F
16V
C3716
DEMOD_RESET
0 . 1 u F
16V
C3724
+5V_TUNER
FE_TS_VAL_ERR
FE_TS_CLK
0
FULL_NIM
R3726
TU_CVBS
22uF
16V
16V
C3722
+5V_TUNER
0
FULL_NIM_CHINA
R3723
0 . 1 u F
16V
C3704
0 . 1 u F
16V
16V
OPT
C3728
FE_TS_DATA[0-7]
MLB-201209-0120P-N2
L3703
0 . 1 u F
16V
C3740
HALF_NIM
UDA55AL
TU3702-*3
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
S I F
8
NC(IF_TP)
3
+B[+5V]
16
IF_AGC_CNTL
7
SDA
6
SCL
15
RESET
18
DIF_2
SHIELD
19
1K
TU_IIC_NON_ATSC_SANYO
R3740-*1
MLB-201209-0120P-N2
L3702
+5V_TUNER
22pF
50V
FULL_NIM
50V
FULL_NIM
C3714
150
R3703
OPT
0 . 1 u F
16V
16V
C3738
0
FULL_NIM
R3730
1/10W
1
HALF_NIM
R3766
22uF
10V
10V
C3723
10K
OPT
R3754
2SC3052
OPT
Q3704
E
B
C
TU_SCL
220
R3752
BUFFER
+3.3V_TU
22pF
50V
50V
FULL_NIM
C3712
+1.2V/+1.8V_TU
TUNER_RESET
+1.2V/+1.8V_TU
AP1117EG-13
HALF_NIM_1.2V_DIODES
I C 3 7 0 3 - * 1
ADJ/GND
OUT
IN
+3.3V_TU
+3.3V_TU
IF_AGC_SEL
MLG1005SR27JT
R3735-*1
TU_I2C_FILTER
10K
FULL_NIM_BCD
R3748-*1
+5V_TUNER
BLM18PG121SN1D
L3701BOOSTER_OPT
18pF
50V
50V
C3713
TU_I2C_NON_FILTER
0
FULL_NIM_CHINA
R3725
20pF
50V
50V
C3711-*1
TU_I2C_FILTER
100
FULL_NIM
R3702
1K
OPT
R3750
TDFR-B036F
TU3701-*2
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
S I F
10
NC_4
11
VIDEO
12
GND
13
+ B 2 [ 1 . 2 V ]
14
+ B 3 [ 3 . 3 V ]
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
1.2K
R3740
TU_IIC_ATSC_SANYO
470
R3755
BUFFER
0 . 1 u F
16V
16V
C3706
10K
R3745
BOOSTER_OPT
10K
FULL_NIM_BCD
R3769
4.7K
FULL_NIM
R3742
0
FULL_NIM
R3727
0 . 1 u F
16V
C3702
THERMAL
AP2132MP-2.5TRG1
IC3701
FULL_NIM_BCD
3
VIN
2
EN
4
VCTRL
1
PG
5
NC
6
VOUT
7
ADJ
8
GND
9
[ E P ]
33
R3736
TU_I2C_NON_FILTER
DEMOD_SCL
1K
R3741-*1
TU_IIC_NON_ATSC_SANYO
1.2K
R3741
TU_IIC_ATSC_SANYO
+3.3V_TU
0 . 0 1 u F
25V
25V
C3709
BOOSTER_OPT
10K
FULL_NIM_BCD
R3771
+5V_Normal
5.1K
FULL_NIM_SEMTEK
R3748
+3.3V_TU
DEMOD_SDA
TDTJ-S101D
TU3702-*4
GP2R_AU_1INPUT_H_LGIT
14
+ B 3 [ 3 . 3 V ]
13
+ B 2 [ 1 . 2 V ]
5
MOPLL_AS
12
GND
11
VIDEO
2
NC_1
10
NC_3
4
RF_AGC
1
ANT_PWR
17
DIF_1[N]
9
S I F
8
NC_2
3
+B1[5V]
16
IF_AGC
7
SDA
6
SCL
15
RESET
18
D I F _ 2 [ P ]
SHIELD
19
TU_SIF
+3.3V_Normal
+5V_TU
SC4215ISTRT
FULL_NIM_SEMTEK
IC3701-*1
3
VIN
2
EN
4
NC_2
1
NC_1
5
NC_3
6
VO
7
ADJ
8
GND
1005
9.1K
FULL_NIM
R3747
20pF
50V
50V
C3743
TU_I2C_FILTER
100uF
16V
16V
C3705
FULL_NIM
AZ1117BH-1.8TRE1
I C 3 7 0 3 - * 2
HALF_NIM_1.8V
1
ADJ/GND
2
OUT
3
IN
100
R3704
HALF_NIM
0
R3772
NON_BUFFER
0
R3773
NON_BUFFER
0
R3774
+3.3V_BUFFER
0
R3775
+5V_BUFFER
0
R3776
+3.3V_BUFFER
0
R3777
+5V_BUFFER
+5V_TU
+5V_TU
TDSS-G101D
SI2176_DVB_1INPUT_H
TU3700
5
+3.3V
11
DIF[N]
2
RESET
10
D I F [ P ]
4
SDA
1
NC
9
IF_AGC
8
CVBS
3
SCL
7
+1.8V
6
S I F
12
SHIELD
TDSS-H101F
TU3700-*1
SI2176_ATSC_1INPUT_H
5
+ B 1 [ 3 . 3 V ]
11
DIF[N]
2
RESET
10
D I F [ P ]
4
SDA
1
NC
9
IF_AGC
8
CVBS
3
SCL
7
+ B 2 [ 1 . 8 V ]
6
S I F
12
SHIELD
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]
TUNER_L
20110511
14
GP3_S7LR
G P I O m u s t b e a d d e d .
R1
P l e a s e , c h e c k M u l t i I t e m ! 1 0 / 1 2
BOOSTER : CHINA OPT
OPTION : RF AGC
FE_AGC_SPEED_CTL
P4R_GLOBAL_TUNER_BLOCK
C l o s e t o t h e C I S l o t
1 . s h o u l d b e g u a r d e d b y g r o u n d
2 . N o v i a o n b o t h o f t h e m
3 . S i g n a l W i d t h > = 1 2 m i l s
S i g n a l t o S i g n a l W i d t h = 1 2 m i l s
G r o u n d W i d t h > = 2 4 m i l s
s h o u l d b e g u a r d e d b y g r o u n d
close to TUNER
T h i s w a s b e i n g a p p l i e d t o t h e o n l y c h i n a d e m o d ,
s o t h i s h a s t o b e d e l e t e d i n b o t h m a i n a n d I S D B s h e e t .
200mA
a d d , 0 9 2 9
R1
S i z e c h a n g e , 0 9 2 9
l o c a t i o n m o v e m e n t , 0 9 2 9
P u l l - u p c a n ’ t b e a p p l i e d
because of MODEL_OPT_2
R2
close to TUNER
Vo=0.8*(1+R1/R2)
c l o s e t o I F l i n e
TUNER MULTI-OPTION
c l o s e t o t h e t u n e r p i n , a d d , 0 9 0 2 9
R2
380mA
C l o s e t o t h e t u n e r
S i z e c h a n g e , 0 9 2 9
FE_BOOSTER_CTL
60mA
T h e p u l l - u p / d o w n o f L N A 2 _ C T L
is depended on MODLE_OPT_1.
GPIO must be added for FE_BOOSTER_CTL
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 . 1 u F
50V
C501
0 . 1 u F
50V
50V
C521
1uF
25V
25V
C528
0 . 1 u F
50V
C537
+24V_AMP
0 . 1 u F
50V
50V
C519
+24V_AMP
SPK_L-
0 . 1 u F
16V
C514
390pF
50V
C533
0 . 1 u F
16V
C513
1000pF
50V
C516
AMP_SCL
100
R503
12
R515
+24V_AMP
0 . 1 u F
50V
50V
C540
12
R514
10K
R501
NON_LIPS
10.0uH
L506
10K
R502
NON_LIPS
WAFER-ANGLE
P501
1
2
3
4
0 . 4 7 u F
50V
C536
1N4148W
100V
OPT
D504
12
R512
22000pF
50V
C526
0 . 1 u F
50V
50V
C522
SPK_L+
AUD_MASTER_CLK
AMP_RESET
390pF
50V
C530
BLM18PG121SN1D
L502
12
R509
33pF
50V
50V
C507
SPK_L-
10uF
35V
35V
C523
THERMAL
NTP-7400L
IC501
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]
4.7K
R519
0 . 1 u F
50V
50V
C520
2SC3052
Q501
NON_LIPS
E
B
C
0 . 4 7 u F
50V
C535
3.3K
R505
10.0uH
L505
1N4148W
100V
OPT
D502
12
R508
1N4148W
100V
OPT
D503
4.7K
R517
10.0uH
L504
12
R511
100
R506
NON_LIPS
1uF
25V
25V
C529
4.7K
R516
SPK_L+
0 . 1 u F
50V
C502
22000pF
50V
C517
SPK_R-
+24V
0 . 0 1 u F
50V
50V
OPT
C525
22000pF
50V
C518
0 . 1 u F
16V
C512
AUD_LRCK
10uF
10V
OPT
C511
1uF
25V
25V
C534
0 . 1 u F
50V
C538
390pF
50V
C531
10.0uH
L503
1000pF
50V
C505
MLB-201209-0120P-N2
L501
10uF
35V
C524
22000pF
50V
50V
C527
0 . 1 u F
50V
C539
+3.5V_ST
SPK_R+
33pF
50V
50V
C509
AMP_MUTE
100pF
50V
C503
1N4148W
100V
OPT
D501
AMP_SDA
0 . 1 u F
16V
C508
10uF
10V
10V
C515
10uF
10V
OPT
C506
C506
SPK_R+
+3.3V_Normal
390pF
50V
C532
AUD_LRCH
12
R513
AUD_SCK
3 . 3
OPT
R507
SPK_R-
1000pF
50V
C504
10uF
10V
OPT
C510
100
R504
12
R510
4.7K
R518
10K
R520
NON_LIPS
10K
R521
EXT_AMP_MUTE
0
LIPS_ONLY
R522
POWER_DET
NTP7400
20110324
16
GP3_S7LR
SPEAKER_L
SPEAKER_R
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