LG 22LT360C Service Manual page 29

P4R_GLOBAL_TUNER_BLOCK
TU3700
TDSS-G101D
SI2176_DVB_1INPUT_H
NC
1
RESET
2
SCL
3
SDA
4
+3.3V
5
SIF
6
+1.8V
7
CVBS
8
IF_AGC
9
D I F [ 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
TU3700-*1 TU3700-*2
TDSS-H101F
TDSS-G201D
NC NC_1
1
1
RESET RESET
2
2
SCL
SCL
3
3
SDA
SDA
4 4
+B1[3.3V] +B1[3.3V]
5
5
SIF NC_2
6
6
+B2[1.8V]
+B2[1.8V]
7 7
CVBS
NC_3
8 8
IF_AGC IF_AGC
9
9
D I F [ P ]
D I F [ P ]
10
10
DIF[N]
DIF[N]
11 11
12
12
SHIELD SHIELD
C3702-*1
0
ASIA
close to TUNER
C3702
0 . 1 u F 16V
NON_ASIA
+1.2V/+1.8V_TU
C3739
10uF
6.3V
C3737 C3738 C3705
100pF 0 . 1 u F 22uF
25V
50V 16V
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
R3760 0
R3761 0
C l o s e t o t h e t u n e r
C3713
C3711
18pF
18pF
50V
50V
+3.3V_TU
+3.3V_TU
C3707 C3708
0 . 1 u F
100pF
16V
50V
R3733 C3750 C3751
R3732 100K
5pF 5pF
100
50V 50V
TUNER_RESET
ASIA ASIA
C3710
0 . 1 u F
16V
R3704 100
IF_AGC_MAIN
s h o u l d b e g u a r d e d b y g r o u n d
C3716
0 . 1 u F
16V
+3.3V_TU
+3.3V_TU
R3740
1K R3741
33 R3735
1K
TU_SCL
33
R3736
R3751
220
C3742 C3743
20pF 20pF OPT
50V 50V R3756 0
NON_ASIA R3783
0
OPT OPT
R3750 B
1K
OPT
R3780 R3781
3 . 3 3 . 3
R3782
ASIA ASIA
2K
OPT
R3785 R3786
0 0
ASIA ASIA
IF_N_MSTAR
IF_P_MSTAR
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
+3.3V_TU
OPT
R3758
R3775 0 82
E
MMBT3906(NXP)
B
Q3705
C
R3753
4.7K
R3752
220
TU_CVBS
E
Q3703
MMBT3906(NXP)
C
+1.2V/+1.8V_TU
IC3703
+3.3V_TU
AZ1117BH-1.8TRE1
OUT IN
2 3
1
R3766
C3717
ADJ/GND
1 0 . 1 u F
16V
1/16W
C3741
10uF
10V
a d d , 0 9 2 9
+3.3V_TU +3.3V_Normal
S i z e c h a n g e , 0 9 2 9
L3703
MLB-201209-0120P-N2
60mA
C3723 C3725 C3715 C3727
22uF 0 . 1 u F 22uF
10V 16V 10V 16V
GP3_S7LR 20110511
TUNER_L 14
LGE Internal Use Only
0 . 1 u F