LG 22LS3700 Service Manual page 27

GLOBAL tuner block except EU and China
TU3704
TU3703
TDSH-T101F
TDSN_B001F
SI2176_TW_2INPUT_H SI2176_BR_2INPUT_H
close to TUNER
RF_S/W_CTL RF_S/W_CTL
1
1
RESET RESET
2 2
SCL SCL
3 3
SDA SDA
4 4
+B1[3.3V]
+B1[3.3V]
5 5
SIF
SIF
6 6
+B2[1.8V]
+B2[1.8V]
7 7
CVBS
CVBS
8 8
NC_1
IF_AGC
9 9
NC_2
DIF[P]
10 10
NC_3
DIF[N]
11 11
+B3[3.3V]
12
12
+B4[1.23V]
13
+1.23V_TU
SHIELD
NC_4
14
GND
15
ERROR
16
SYNC
17
VALID
18
MCLK
19
D0
20
D1
21
D2
22
D3
23
D4
24
D5
25
D6
26
D7
27
28
SHIELD
TUNER MULTI-OPTION
TU3700-*1
TDSS-H101F
SI2176_ATSC_1INPUT_H
NC
1
RESET
2
SCL
3
SDA
4
+B1[3.3V]
5
SIF
6
+B2[1.8V]
7
CVBS
8
IF_AGC
9
DIF[P]
10
DIF[N]
11
12
SHIELD
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.
Copyright © 2012 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
RF_SWITCH_CTL
Pull-up can't be applied
because of MODEL_OPT_2
TU3700
TDSS-G201D
SI2156_DVB_1INPUT_H
+3.3V_TU
R3733
100K
R3732
100
NC_1
R3705 0 1
C3701
RF_SW_OPT
0.1uF RESET
16V 2
SCL
3
SDA
4
C3702-*1
0
+B1[3.3V]
ASIA
5
NC_2
close to TUNER
6 C3702
0.1uF 16V
+B2[1.8V]
NON_ASIA
7
NC_3
8
IF_AGC
9
DIF[P]
10
DIF[N]
11
L3706
12
120
FULL_NIM
C3718
0.1uF
16V SHIELD
FULL_NIM
Close to the CI Slot
C3711-*1 C3713-*1
20pF
20pF
50V 50V
TU_I2C_FILTER TU_I2C_FILTER
TUNER_RESET
TU_I2C_FILTER TU_I2C_FILTER
R3735-*1 R3736-*1
C3710
0.1uF
16V
TU_IIC_ATSC_1.8K
TU_I2C_NON_FILTER
R3735 33
R3736 33
TU_I2C_NON_FILTER
TU_I2C_NON_FILTER TU_I2C_FILTER
C3711 C3713 C3742
18pF 18pF 20pF
50V 50V 50V
TU_I2C_NON_FILTER
R3783 0
NON_ASIA
R3784
C3750 C3751
5pF 5pF R3780 R3781
3.3 3.3
50V 50V
R3761 0 ASIA R3782 ASIA
ASIA ASIA 2K
OPT
HALF_NIM
R3760 0
R3785 R3786
0 0
HALF_NIM
ASIA ASIA
Close to the tuner
+1.8V_TU
C3737 C3738 C3705
100pF 0.1uF 100uF
50V 16V 16V close to the tuner pin, add,09029
OPT
R3704 100
HALF_NIM
C3716
0.1uF
16V
HALF_NIM
FE_TS_SYNC
FE_TS_DATA[0-7]
FE_TS_VAL_ERR
FE_TS_CLK
FE_TS_DATA[0]
FE_TS_DATA[1]
FE_TS_DATA[2]
FE_TS_DATA[3]
FE_TS_DATA[4]
FE_TS_DATA[5]
FE_TS_DATA[6]
FE_TS_DATA[7]
+3.3V_TU
60mA
C3723
22uF
10V
R3741-*3
2.2K
TU_IIC_BR_2.2K
R3740-*3
2.2K
TU_IIC_BR_2.2K
R3741-*2
1.2K
TU_IIC_ATSC_1.2K
R3740-*2
1.2K
+3.3V_TU TU_IIC_ATSC_1.2K
R3740-*1
1K
TU_IIC_NON_ATSC_1K
R3741-*1
1K
TU_IIC_NON_ATSC_1K
R3740 R3741
1.8K 1.8K
TU_IIC_ATSC_1.8K
TU_SCL
TU_SDA
C3743
20pF
50V
TU_I2C_FILTER
+3.3V_TU
R3751
0 220
TU_BUFFER
NON_ASIA
R3756 0
TU_NON_BUFFER
E
Q3703
R3749 0
MMBT3906(NXP)
TU_BUFFER
TU_BUFFER B
C
R3750
1K
OPT
IF_P_MSTAR
IF_N_MSTAR
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
+3.3V_TU
C3739 C3707 C3708
10uF 100pF 0.1uF
6.3V 50V 16V
OPT
IF_AGC_MAIN
should be guarded by ground
+3.3V_TU
AP1117E18G-13
3
IN
Vo=VREF*(1+R2/R1)
VREF = 1.25V
R3771 10K
FULL_NIM_OPT
C3717
0.1uF
16V
+5V_Normal
R3713
+3.3V_Normal
0
FULL_NIM_BCD
Size change,0929
L3703
CIS21J121
C3725 C3715
C3727
0.1uF 22uF 0.1uF
16V 10V 16V
Add,0929
TUNER_NON_EU
FE_AGC_SPEED_CTL
IF_AGC_SEL
DEMOD_RESET
FE_BOOSTER_CTL
LNA2_CTL
DEMOD_SCL
DEMOD_SDA
+3.3V_TU
R3774
470
TU_BUFFER
R3775 R3758
0 82
TU_SIF
TU_NON_BUFFER
E
Q3705
MMBT3906(NXP)
B TU_BUFFER
C
R3753
4.7K
TU_BUFFER
R3752
220
TU_BUFFER
TU_CVBS
IC3703
+1.8V_TU
R1
OPT
1
ADJ/GND
OUT R3710
200
1%
2
R3766
R3711
1
0
R2
C3741
C3740
0.1uF
10uF
16V
10V
IC3701
AP2132MP-2.5TRG1
[EP]
+1.23V_TU
380mA
PG GND
1 8
FULL_NIM_BCD FULL_NIM_BCD FULL_NIM_BCD
R3748 R3776
EN ADJ
11K 10K
2 7
R1
VIN VOUT
3 6
VCTRL NC
FULL_NIM_BCD
4 5 C3729
C3730
0.1uF
R3747
10uF
16V
20K 10V
FULL_NIM
FULL_NIM
1005
R2
FULL_NIM_TJ
BCD Vo=0.6*(1+R1/R2)
IC3701-*1
TJ4220GDP-ADJ [EP]GND
TJ Vo=0.8*(1+R1/R2)
NC_1 GND
1 8 FULL_NIM FULL_NIM_TJ
R3776-*1
EN2 ADJ/SENSE R3748-*1
2 7
5.1K 0
VIN3 VOUT
3 6
NC4 NC_2
FULL_NIM_TJ
4 5
R3747-*1
9.1K
GP4L_S7LR2 2011.10.11
14
LGE Internal Use Only