LG 32LN540B (CHASSIS:LT36B) 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.
S_FLASH_OS
2012/06/20
13
NC4_S7LRM
SPI_SCK
+3.5V_ST
+3.5V_ST
C1300
0.1uF
0.1uF
R1301
4.7K
OPT
/SPI_CS
SPI_SDO
IC1300
MX25L8006EM2I-12G
SPI_FLASH_MACRONIX
3
WP#
2
SO/SIO1
4
GND
1
CS#
5
SI/SIO0
6
SCLK
7
HOLD#
8
VCC
R1302
33
R1300
10K
10K
OPT
SPI_SDI
/FLASH_WP
IC1300-*1
W25Q80BVSSIG
SPI_FLASH_WINBOND
3
%WP[IO2]
2
DO[IO1]
4
GND
1
CS
5
DI[IO0]
6
CLK
7
HOLD[IO3]
8
VCC
+3.5V_ST
Serial Flash for SPI boot(OS)
THERMAL
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.
+1.8V_TU
R3760
0
HALF_NIM
R3769
10K
FULL_NIM
C3711-*1
20pF
50V
20pF
50V
TU_I2C_FILTER
R3710
200
1%
OPT
C3743
20pF
50V
TU_I2C_FILTER
20pF
50V
TU_I2C_FILTER
IC3701-*1
TJ4220GDP-ADJ
FULL_NIM_TJ
3
VIN3
2
EN2
4
NC4
1
NC_1
5
NC_2
6
VOUT
7
ADJ/SENSE
8
GND
9
[EP]GND
R3741-*1
1K
TU_IIC_NON_ATSC_1K
TU_GND_A
R3796
2.2K
2.2K
TW_FE_LNA
R3714
0
NON_ASIA
R3704
100
HALF_NIM
R3740-*1
1K
TU_IIC_NON_ATSC_1K
R3735
TU_I2C_NON_FILTER
33
+3.3V_TU
LNA2_CTL
R3756
0
TU_NON_BUFFER_VIDEO
R3774
470
TU_BUFFER_SIF
C3742
20pF
50V
20pF
50V
TU_I2C_FILTER
R3711
0
TUNER_RESET
R3750
1K
OPT
L3703
CIS21J121
IF_P_MSTAR
C3729
0.1uF
16V
FULL_NIM
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]
C3752
0.1uF
16V
TW_FE_LNA
R3758
82
82
C3751
5pF
50V
5pF
50V
OPT
R3736
TU_I2C_NON_FILTER
33
TU_GND_A
R3783
0
W_A_DEMOD
DEMOD_SCL
IF_AGC_MAIN
R3771
10K
FULL_NIM_OPT
TU3700
TDSS-G201D
SI2156_DVB_1INPUT_H
5
+B1[3.3V]
11
DIF[N]
2
RESET
10
DIF[P]
4
SDA
1
NC_1
9
IF_AGC
8
NC_3
3
SCL
7
+B2[1.8V]
6
NC_2
12
SHIELD
A1
A1
B1
B1
TU_SDA
+3.3V_TU
C3727
0.1uF
16V
R3733
100K
R3781
3.3
OPT
R3780
3.3
OPT
C3707
100pF
50V
100pF
50V
+3.3V_TU_Noise
FE_TS_VAL_ERR
R3748-*1
5.1K
5.1K
FULL_NIM
R3715
0
NON_ASIA
+5V_Normal
C3716
0.1uF
16V
HALF_NIM
C3750
5pF
50V
OPT
5pF
50V
OPT
R3741-*3
2.2K
TU_IIC_BR_2.2K
+1.8V_TU
+3.3V_TU
R3747-*1
9.1K
9.1K
FULL_NIM_TJ
R3751
220
TU_BUFFER_VIDEO
R3713
0
0
FULL_NIM_BCD
C3708
0.1uF
16V
16V
R3747
20K
1005
FULL_NIM_BCD
LNA_CTRL_2
C3738
0.1uF
16V
0.1uF
16V
Q3705
MMBT3906(NXP)
TU_BUFFER_SIF
E
B
C
+3.3V_TU
C3713-*1
20pF
50V
20pF
50V
TU_I2C_FILTER
R3732
100
100
C3718
0.1uF
16V
FULL_NIM
IC3703
AP1117E18G-13
2
OUT
3
IN
1
ADJ/GND
TU_GND_A
R3741-*2
1.2K
TU_IIC_ATSC_1.2K
TU_IIC_ATSC_1.2K
R3782
2K
2K
OPT
+3.3V_TU
R3735-*1
TU_I2C_FILTER
R3784
0
W_A_DEMOD
FE_TS_DATA[0]
R3749
0
TU_BUFFER_VIDEO
TU_SCL
C3737
100pF
50V
100pF
50V
+3.3V_TU
C3753
0.1uF
16V
TW_FE_LNA
C3740
0.1uF
16V
TU_GND_A
Q3703
MMBT3906(NXP)
TU_BUFFER_VIDEO
E
B
C
TU_CVBS
TU_SIF
R3761
0
HALF_NIM
R3775
0
0
TU_NON_BUFFER_SIF
R3740-*2
1.2K
TU_IIC_ATSC_1.2K
BR_RESET_DEMOD
L3706
120
FULL_NIM
R3776-*1
0
0
FULL_NIM_TJ
TU3704-*1
TDSN-T601F
SI2178_TW_2INPUT_H
1
RF_S/W_CTL
2
RESET_TUNER
3
SCL
4
SDA
5
+B1[3.3V]
6
SIF
7
+B2[1.8V]
8
CVBS
9
IF_AGC
10
DIF[P]
11
DIF[N]
12
NC_1
13
NC_2
14
NC_3
15
GND
16
NC_4
17
NC_5
18
NC_6
19
NC_7
20
NC_8
21
NC_9
22
NC_10
23
NC_11
24
NC_12
25
NC_13
26
NC_14
27
NC_15
28
SHIELD
A1
A1
B1
B1
R3740
1.8K
TU_IIC_ATSC_1.8K
TU_GND_A
FE_TS_CLK
+1.23V_TU
RF_SWITCH_CTL
C3702
0.1uF
16V
W_A_DEMOD
+1.23V_TU
FE_TS_SYNC
IF_AGC_SEL
R3797
2.2K
2.2K
TW_FE_LNA
R3736-*1
TU_I2C_FILTER
C3710
0.1uF
16V
LNA_CTRL_1
C3713
18pF
50V
TU_I2C_NON_FILTER
18pF
50V
TU_I2C_NON_FILTER
C3701
0.1uF
16V
0.1uF
16V
DEMOD_SDA
C3717
0.1uF
16V
R3762
2K
2K
OPT
R3748
11K
11K
FULL_NIM_BCD
+3.3V_TU
R3752
220
TU_BUFFER_VIDEO
C3711
18pF
50V
18pF
50V
TU_I2C_NON_FILTER
R3753
4.7K
TU_BUFFER_SIF
R3741
1.8K
TU_IIC_ATSC_1.8K
R3776
10K
10K
FULL_NIM_BCD
R3740-*3
2.2K
TU_IIC_BR_2.2K
C3725
0.1uF
16V
16V
IF_N_MSTAR
+3.3V_Normal
C3723
22uF
6.3V
22uF
6.3V
C3715
22uF
6.3V
22uF
6.3V
R3766
1
1
C3754
0.1uF
16V
0.1uF
16V
FULL_NIM
C3730-*1
10uF 10V
CAP_X7R_MP
C3741-*1
10uF 10V
CAP_X7R_MP
L3704
R3705
1K
RF_SW_OPT
R3800
10K
RF_SW_OPT
R3798
1K
FULL_NIM
R3799
10K
FULL_NIM
TU3702
TDSH-G501D
ISOLATOR_DVB_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
A1
A1
B1
B1
A2
A2
B2
B2
C3741
CAP_10uF_X5R
C3730
CAP_10uF_X5R
R3801
0
0
FULL_NIM_D_DEMODE_0
R3802
0
0
FULL_NIM_D_DEMODE_0
R3803
0
0
FULL_NIM_D_DEMODE_0
R3804
0
0
FULL_NIM_D_DEMODE_0
R3801-1*
47
47
FULL_NIM_D_DEMODE_47
R3802-1*
47
47
FULL_NIM_D_DEMODE_47
R3803-*1
47
47
FULL_NIM_D_DEMODE_47
R3804-*1
47
47
FULL_NIM_D_DEMODE_47
C3707-*1
1uF
10V
1uF
10V
+3.3V_TU_Noise_X5R
L3707
+3.3V_TU
R3760-*1
10
10
HALF_NIM/IF_FILTER
R3761-*1
10
10
HALF_NIM/IF_FILTER
TU3700-*1
TDSS-H501F
SI2176_ATSC_1INPUT_H
5
+B1[3.3V]
11
DIF[N]
2
RESET
10
DIF[P]
4
SDA
1
NC
9
IF_AGC
8
ALIF_[P]
3
SCL
7
+B2[1.8]
6
ALIF_[N]
12
SHIELD
A1
A1
B1
B1
TU3704
TDSN-T701F(B)
SI2178_TW_LNA_2INPUT_H
1
RF_S/WCTL
2
RESET
3
SCL
4
SDA
5
B1[+3.3V]
6
SIF
7
B2[1.8V]
8
CVBS
9
IF_AGC
10
DIF[P]
11
DIF[N]
12
NC_1
13
NC_2
14
NC_3
15
GND
16
NC_4
17
NC_5
18
NC_6
19
NC_7
20
NC_8
21
NC_9
22
NC_10
23
NC_11
24
NC_12
25
NC_13
26
NC_14
27
NC_15
A1
59
LNA_CTRL_1
57
LNA_CTRL_2
58
A1
B1
SHIELD
B1
TU3703
TDSN-B601F(B)
SI2178_BR_2INPUT_H
1
RF_S/W_CTL
2
RESET_TUNER
3
SCL
4
SDA
5
+B1[3.3V]
6
SIF
7
+B2[1.8V]
8
CVBS
9
NC_1
10
NC_2
11
NC_3
12
+B3[3.3V]
13
+B4[1.23V]
14
RESET_DEMOD
15
GND
16
ERROR
17
SYNC
18
VALID
19
MCLK
20
DATA
21
NC_4
22
NC_5
23
NC_6
24
NC_7
25
NC_8
26
NC_9
27
NC_10
28
SHIELD
A1
A1
B1
B1
2012.09.19
R1
VREF = 1.25V
should be guarded by ground
60mA
BCD Vo=0.6*(1+R1/R2)
TUNER MULTI-OPTION
NC4_S7LRM
GLOBAL tuner block except EU and China
Pull-up can’t be applied
because of MODEL_OPT_2
because of MODEL_OPT_2
TJ Vo=0.8*(1+R1/R2)
close to TUNER
close to TUNER
FE_BOOSTER_CTL
Vo=VREF*(1+R2/R1)
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
close to the tuner pin, add,09029
Close to the tuner
TUNER_NON_EU
R1
Size change,0929
close to TUNER
14
FE_AGC_SPEED_CTL
R2
GND seperation for ASIS tuner
R2
380mA
CHANGE TO
10UF 10V X5R
10UF 10V X5R
CHANGE TO
6.3V 2012 X5R
6.3V 2012 X5R
CHANGE TO
6.3V 2012 X5R
6.3V 2012 X5R
CHANGE TO
10UF 10V X5R
10UF 10V X5R
HPF
LPF
Frequence
1
0
0
54MHz~350MHz
TW_FE_LNA FILTER_SETTING
CTRL_1
CTRL_2
0
350Hz~450MHz
450Hz~870MHz
Filter_Type
1
0
Through
close to TUNER
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.
2012/06/20
HEADPHONE
15
NC4_S7LRM
R1500
3.3K
HEAD_PHONE_POP
C1500
10uF
16V
10uF
16V
HEAD_PHONE
C1501
10uF
16V
10uF
16V
HEAD_PHONE
JK1500
KJA-PH-0-0177
HEAD_PHONE
3
DETECT
4
L
5
GND
1
R
+3.3V_Normal
R1504
10K
10K
HEAD_PHONE
C1503
1000pF
50V
1000pF
50V
OPT
HP_LOUT
R1503
1K
1K
HEAD_PHONE
HP_DET
+3.5V_ST
HP_ROUT
SIDE_HP_MUTE
R1501
1K
1K
HEAD_PHONE
C1502
1000pF
50V
1000pF
50V
OPT
R1502
1K
HEAD_PHONE
Q1502
MMBT3904(NXP)
MMBT3904(NXP)
HEAD_PHONE_POP
E
B
C
Q1503
MMBT3904(NXP)
HEAD_PHONE_POP
E
B
C
Q1505
MMBT3904(NXP)
HEAD_PHONE_POP
E
B
C
Q1504
MMBT3904(NXP)
HEAD_PHONE_POP
E
B
C
Q1501
MMBT3906(NXP)
HEAD_PHONE_POP
E
B
C
Q1500
MMBT3904(NXP)
HEAD_PHONE_POP
E
B
C
R1505
1K
1K
HEAD_PHONE_POP
Headphone
*Option : HEAD_PHONE
*Option : HEAD_PHONE
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.
COMP2_Pr+
AV2_CVBS_DET
R1714
10K
10K
R1721
12K
12K
R1715
10K
10K
R1719
12K
AV2
R1713
1K
R1707
75
R1704
470K
R1700
470K
AV2
D1706
5.6V
OPT
R1712
1K
COMP2_Pb+
+3.3V_Normal
COMP2_DET
R1701
470K
AV2
R1705
75
75
R1709
10K
COMP2_R_IN
R1703
470K
D1709
5.6V
OPT
AV2_R_IN
D1702
5.6V
OPT
D1701
5.6V
AV2_LR_ZENER
C1701
1000pF
50V
OPT
R1716
10K
10K
AV2
R1710
10K
10K
C1704
1000pF
50V
OPT
R1706
75
COMP2_L_IN
R1711
1K
AV2
+3.3V_Normal
+3.3V_Normal
D1704
5.6V
COMP_LR_ZENER
R1702
75
AV2
D1700
5.6V
AV2_LR_ZENER
R1718
12K
AV2
R1708
10K
AV2
AV2_CVBS_IN
C1703
47pF
50V
47pF
50V
AV2
COMP2_Y+/AV_CVBS_IN
C1702
1000pF
50V
OPT
R1720
12K
12K
AV2_L_IN
R1717
10K
10K
AV2
D1705
5.6V
COMP_LR_ZENER
AV_CVBS_DET
C1705
1000pF
50V
OPT
R1722
0
0
DTV/MNT_VOUT
R1723
75
CVBS_TEST
+3.3V_Normal
C1706
0.1uF
0.1uF
CVBS_TEST
C1707
0.1uF
CVBS_TEST
4.7uF
C1708
CVBS_TEST
JK1701
PPJ248-01
COMP_AV1/2
6D
[GN]C-SPRING
7D
[GN]E-LUG
4D
[GN]CONTACT
5E
[BL]C-SPRING
8F
[RD1]E-LUG-S
6F
[RD1]C-SPRING
4F
[RD1]CONTACT
5G
[WH1]C-SPRING
4H
[RD2]CONTACT
6H
[RD2]C-SPRING
7H
[RD2]E-LUG
7A
[YL]E-LUG
6A
[YL]C-SPRING
4A
[YL]CONTACT
5B
[WH2]C-SPRING
4C
[RD3]CONTACT
6C
[RD3]C-SPRING
7C
[RD3]E-LUG
D1711
COMP_Y_ZENER_ROHM
D1703
COMP_Pr_ZENER_ROHM
D1712
COMP_Y_ZENER_ROHM
D1714
AV2_CVBS_ZENER_ROHM
D1713
AV2_CVBS_ZENER_ROHM
D1710
COMP_Pb_ZENER_ROHM
D1708
COMP_Pb_ZENER_ROHM
D1707
COMP_Pr_ZENER_ROHM
D1714-*1
AV2_CVBS_ZENER_KEC
D1713-*1
AV2_CVBS_ZENER_KEC
D1710-*1
COMP_Pb_ZENER_KEC
D1708-*1
COMP_Pb_ZENER_KEC
D1707-*1
COMP_Pr_ZENER_KEC
D1703-*1
COMP_Pr_ZENER_KEC
D1712-*1
COMP_Y_ZENER_KEC
D1711-*1
COMP_Y_ZENER_KEC
JK1702
PPJ245-01
COMP_AV1
6A
[GN]C-SPRING
7A
[GN]E-LUG
4A
[GN]CONTACT
5B
[BL]C-SPRING
8C
[RD1]E-LUG-S
6C
[RD1]C-SPRING
4C
[RD1]CONTACT
5D
[WH]C-SPRING
4E
[RD2]CONTACT
6E
[RD2]C-SPRING
7E
[RD2]E-LUG
IC1700
MM1756DURE
CVBS_TEST
3
BIAS
2
GND
4
OUT
1
IN
6
VCC
5
PS
2012.08.14
NC4_S7LRM
REAR_NON_EU_L
COMPONENT
&
AV1
&
AV1
17
AV2
COMPONENT1 & AV(COMMON), AV2
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