LG 42LD450 Service Manual page 32

LGIT CAN NIM_H/N TUNER for EU & CHINA
TU3701
TU3702
TDTJ-S001D TDFR-C035D
EU_TUNER TDFR-C035D close to TUNER
ANT_PWR[OPT] RF_S/W_CNTL
1 1
BST_CNTL BST_CNTL
2 2
+B +B1[+5V]
3 3
NC[RF_AGC] NC[RF_AGC]
4 4
AS NC_1
5 5
SCL SCLT
6 6
SDA SDAT
7 7
NC[IF_TP] NC_2
8 8
SIF SIF
9 9
NC NC_3
10 10
VIDEO VIDEO
11 11
GND GND
12 12
1.2V +B2[1.2V]
13 13
3.3V +B3[3.3V]
14 14
RESET RESET
15 15
IF_AGC_CNTL NC_4
16 16
DIF_1 SCL
17 17
DIF_2 SDA
18 18 R3701
ERR
19
19
SYNC
20
SHIELD
VALID
21
MCL
22
D0
23
TU3701-*1
D1
TDFR-C155D
24
TDFR-C155D D2
25
RF_S/W_CNTL
1
D3
BST_CNTL
2
26
+B1[+5V]
3 D4
NC[RF_AGC] 27
4
D5
NC_1
5
28
SCLT
6
D6
SDAT 29
7
NC_2 D7
8
30
31
SIF
9
NC_3
10
VIDEO
11
SHIELD
GND
12
+B2[1.2V]
13
+B3[3.3V]
14
RESET
15
NC_4
16
SCL
17
SDA
18
ERR
19
SYNC
20
VALID
21
MCL
22
D0
23
D1
24
D2
25
D3
26
D4
27
D5
28
D6
29
D7
30
31
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 © 2010 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
close to TUNER
OPT
R3762 0
CONTROL_ATTEN
+5V_TU
R3705 0
C3731
C3701
CHINA_OPT C3728
10uF
0.1uF
C3704 0.1uF
10V
16V C3703
16V
0.1uF OPT
100pF
16V OPT
50V
C
Q3704
2SC3052
R3707 0
OPT
E
OPT
close to TUNER
C3702
0.1uF 16V
+1.2V/+1.8V_TU +3.3V_TU
CHINA_OPT
C3737 C3738 C3705 C3708
C3707
100uF
100pF 0.1uF 0.1uF
100pF
16V
50V 16V 16V
50V
0
R3704 EU_OPT
R3702 0 CHINA_OPT
0 CHINA_OPT
close to IF line
EU_OPT
R3760 0
R3761 0
EU_OPT
Close to the tuner
CHINA_OPT R3724
CHINA_OPT R3730
CHINA_OPT R3731
R3725
CHINA_OPT
R3727
CHINA_OPT
R3728
CHINA_OPT
CHINA_OPT R3729
CHINA_OPT R3726
CHINA_OPT R3721
CHINA_OPT R3722
CHINA_OPT R3723
Close to the CI Slot
+5V_TU
L3701
R3734
0
Q3701
ISA1530AC1
E
C
CHINA_OPT
C3709
0.01uF
25V
CHINA_OPT
OPTION : RF AGC
GPIO must be added.
R3754
10K
B FE_AGC_SPEED_CTL
+3.3V_TU
IF_AGC_SEL
OPT
R3740
1.2K
33 R3735
33 R3736
C3713
C3711
18pF
18pF
50V
50V
+3.3V_TU
IF_AGC_MAIN
R3733
R3732 100K
100
TUNER_RESET should be guarded by ground
C3710
0.1uF
16V
CHINA_OPT
R3738 100
CHINA_OPT
R3739 100
CHINA_OPT
C3714
C3712
22pF 22pF
50V 50V
CHINA_OPT CHINA_OPT
IF_N_MSTAR
IF_P_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
0
FE_TS_SYNC FE_TS_DATA[0-7]
0
FE_TS_VAL_ERR
0
FE_TS_CLK
0
FE_TS_DATA[0]
0
FE_TS_DATA[1]
0 FE_TS_DATA[2]
0 FE_TS_DATA[3]
0 FE_TS_DATA[4]
0 FE_TS_DATA[5]
0 FE_TS_DATA[6]
0
FE_TS_DATA[7]
BOOSTER : CHINA OPT
CHINA_OPT
BLM18PG121SN1D
CHINA_OPT
R3743
10K
CHINA_OPT
R3737
2.2K
B
CHINA_OPT
C
R3745
Q3702 B 10K
FE_BOOSTER_CTL
2SC3052 LNA2_CTL
The pull-up/down of LNA2_CTL
E
CHINA_OPT
is depended on MODLE_OPT_1.
GPIO must be added for FE_BOOSTER_CTL
R3741
1.2K +5V_TU
TU_SCL
TU_SDA
R3751 R3752
220
220
E
R3749 0
R3750 B Q3703
1K ISA1530AC1
C
OPT
+3.3V_TU
R3742
R3744
4.7K
4.7K
CHINA_OPT
DEMOD_SCL
DEMOD_SDA
C3715 C3716
22pF
22pF
50V 50V
OPT
OPT
+3.3V_TU EU_OPT
IC3703
R2
AZ1117H-ADJTRE1(EH11A)
EU_OPT
R3767 +1.2V/+1.8V_TU
10
INPUT ADJ/GND
3 1
2
OUTPUT EU_OPT
R3768
1.2K
R1
IC3701
EU_OPT
SC4215ISTRT
R3766
1
1/10W
NC_1 GND
1 8
CHINA_OPT
CHINA_OPT
R3748
EN ADJ
2 7
4.7K
R1
VIN VO 1608
3 6
C3717
0.1uF
NC_2 NC_3
16V
4 5
C3729
R3747 0.1uF
16V
9.1K
1608
R2
Vo=0.8*(1+R1/R2)
+5V_Normal
+5V_TU
L3702
200mA
BLM18PG121SN1D 60mA
C3719 C3722 C3724 C3726
0.1uF
22uF 22uF 0.1uF
16V
10V 10V 16V
OPT
+5V_TU
R3755
470 R3758
82
TU_SIF
E
B ISA1530AC1
R3753 Q3705
C
4.7K
TU_CVBS
R3703
150
OPT
+1.2V/+1.8V_TU
380mA
R3764
0
1/10W
CHINA_OPT
C3730
DEMOD_RESET
10uF
10V This was being applied to the only china demod,
so this has to be deleted in both main and ISDB sheet.
+3.3V_Normal
+3.3V_TU
L3703
BLM18PG121SN1D
C3727
C3723 C3725
0.1uF
0.1uF
22uF
16V
16V
10V
GP2_Saturn7M
VER 1.0
EU/CHINA CAN TUNER
27
LGE Internal Use Only