Read LG 42LT560H-SA (CHASSIS:LJ2AC) Service Manual 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.
IF_AGC_SEL
100pF
50V
50V
C3737
20pF
50V
50V
C3743
OPT
10uF
6.3V
6.3V
C3739
OPT
DEMOD_SCL
10uF
10V
10V
C3730
FULL_NIM
0
RF_SW_OPT
R3705
18pF
50V
50V
C3711
TUNER_1RF
82
R3758
100
R3732
11K
FULL_NIM_BCD
R3748
100K
R3733
TU_CVBS
0 . 1 u F
16V
C3708
10K
FULL_NIM_OPT
R3771
22uF
10V
10V
C3715
0
R3756
TU_NON_BUFFER
0 . 1 u F
16V
C3702
NON_ASIA
0 . 1 u F
16V
C3729
FULL_NIM
0
R3749
TU_BUFFER
IF_AGC_MAIN
FULL_NIM
L3704
+3.3V_TU
IF_N_MSTAR
0 . 1 u F
16V
C3727
DEMOD_RESET
100uF
16V
16V
C3705
OPT
1K
TU_IIC_NON_ATSC_1K
R3740-*1
+3.3V_TU
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 ]
LNA2_CTL
33
R3735
RF_SWITCH_CTL
0
R3760
HALF_NIM
+3.3V_TU
10K
FULL_NIM
R3769
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
+1.8V_TU
10uF
10V
10V
C3741
+3.3V_TU
1K
R3741-*1
TU_IIC_NON_ATSC_1K
0 . 1 u F
16V
C3716
HALF_NIM
0 . 1 u F
16V
C3717
+1.23V_TU
+5V_Normal
DEMOD_SDA
0 . 1 u F
16V
C3710
TUNER_RESET
FE_TS_DATA[0-7]
4.7K
R3753
TU_BUFFER
TU_SDA
0 . 1 u F
16V
C3740
100pF
50V
50V
C3707
TU_SIF
0
R3775
TU_NON_BUFFER
+3.3V_Normal
+3.3V_TU
0
R3761
HALF_NIM
+3.3V_TU
+3.3V_TU
18pF
50V
50V
C3713
TUNER_1RF
33
R3736
1K
OPT
R3750
+1.8V_TU
FE_TS_SYNC
IF_P_MSTAR
0 . 1 u F
16V
C3725
TU_SCL
0 . 1 u F
16V
16V
C3738
0 . 1 u F
16V
16V
C3701
0 . 1 u F
16V
C3718
FULL_NIM
+1.23V_TU
FE_TS_CLK
22uF
10V
10V
C3723
FE_TS_VAL_ERR
20pF
50V
50V
C3742
OPT
TDSN_B001F
TU3703
SI2176_BR_2INPUT_H
1
RF_S/W_CTL
2
RESET
3
SCL
4
SDA
5
+ B 1 [ 3 . 3 V ]
6
S I F
7
+ B 2 [ 1 . 8 V ]
8
CVBS
9
NC_1
10
NC_2
11
NC_3
12
+ B 3 [ 3 . 3 V ]
13
+ B 4 [ 1 . 2 3 V ]
14
NC_4
15
GND
16
ERROR
17
SYNC
18
VALID
19
MCLK
20
D0
21
D1
22
D2
23
D3
24
D4
25
D5
26
D6
27
D7
28
SHIELD
TDSH-T101F
TU3704
SI2176_TW_2INPUT_H
5
+ B 1 [ 3 . 3 V ]
11
DIF[N]
2
RESET
10
D I F [ P ]
4
SDA
1
RF_S/W_CTL
9
IF_AGC
8
CVBS
3
SCL
7
+ B 2 [ 1 . 8 V ]
6
S I F
12
SHIELD
220
R3751
TU_BUFFER
220
R3752
TU_BUFFER
1
R3766
470
R3774
TU_BUFFER
1005
20K
FULL_NIM_BCD
R3747
10K
FULL_NIM_BCD
R3776
0
ASIA
R3785
2K
R3782
ASIA
0
ASIA
R3786
10pF
50V
50V
C3751
ASIA
10pF
50V
50V
C3750
ASIA
0
NON_ASIA
R3783
0
ASIA
C3702-*1
0
NON_ASIA
R3784
THERMAL
TJ4220GDP-ADJ
IC3701-*1
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
5.1K
FULL_NIM
R3748-*1
0
FULL_NIM_TJ
R3776-*1
9.1K
FULL_NIM_TJ
R3747-*1
AP1117E18G-13
IC3703
OUT
IN
ADJ/GND
68pF
50V
50V
C3711-*1
TUNER_2RF
68pF
50V
50V
C3713-*1
TUENR_2RF
CIS21J121
L3703
120
L3706
FULL_NIM
MMBT3906(NXP)
Q3703
TU_BUFFER
E
B
C
MMBT3906(NXP)
Q3705
TU_BUFFER
E
B
C
0
FULL_NIM_BCD
R3713
200
1%
R3710
100
R3704
HALF_NIM
1.8K
R3740
TU_IIC_ATSC_1.8K
1.8K
R3741
TU_IIC_ATSC_1.8K
1.2K
R3741-*2
TU_IIC_ATSC_1.2K
1.2K
R3740-*2
TU_IIC_ATSC_1.2K
TDSS-G201D
SI2156_DVB_1INPUT_H
TU3700
5
+ B 1 [ 3 . 3 V ]
11
DIF[N]
2
RESET
10
D I F [ P ]
4
SDA
1
NC_1
9
IF_AGC
8
NC_3
3
SCL
7
+ B 2 [ 1 . 8 V ]
6
NC_2
12
SHIELD
100
1%
R3711
390
R3780
ASIA
390
R3781
ASIA
FE_TS_DATA[1]
FE_TS_DATA[2]
FE_TS_DATA[5]
FE_TS_DATA[3]
FE_TS_DATA[4]
FE_TS_DATA[0]
FE_TS_DATA[7]
FE_TS_DATA[6]
TUNER_NON_EU
GP4L_S7LR2
2 0 1 1 . 1 0 . 1 1
14
R1
s h o u l d b e g u a r d e d b y g r o u n d
FE_BOOSTER_CTL
380mA
R2
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
C l o s e t o t h e C I S l o t
FE_AGC_SPEED_CTL
P u l l - u p c a n ’ t b e a p p l i e d
because of MODEL_OPT_2
60mA
close to TUNER
C l o s e t o t h e t u n e r
BCD Vo=0.6*(1+R1/R2)
Add,0929
TUNER MULTI-OPTION
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 i z e c h a n g e , 0 9 2 9
close to TUNER
GLOBAL tuner block except EU and China
T J V o = 0 . 8 * ( 1 + R 1 / R 2 )
Vo=VREF*(1+R2/R1)
VREF = 1.25V
R1
R2
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