LG 47LD455B, Service Manual

Page: 37 / 42

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.
82
R3758
0
R3734
+5V_TU
0 . 1 u F
16V
C3726
FE_TS_SYNC
0
CHINA_OPT R3729
0 CHINA_OPT
R3721
10uF
10V
OPT
C3731
ISA1530AC1
Q3705
E
B
C
10K
R3745
CHINA_OPT
+3.3V_TU
RF_SWITCH_CTL
0
CHINA_OPT R3722
10K
R3743
CHINA_OPT
0
CHINA_OPT R3724
0 . 1 u F
16V
C3708
IF_AGC_MAIN
ISA1530AC1
Q3703
E
B
C
100
CHINA_OPT
R3739
+5V_Normal
TU_SIF
IF_AGC_SEL
0
OPT
R3762
TU_CVBS
0 . 1 u F 16V
C3702
0 . 1 u F
16V
C3704
0
CHINA_OPT R3731
FE_TS_CLK
TUNER_RESET
100
CHINA_OPT
R3738
100K
R3733
0 CHINA_OPT
R3730
BLM18PG121SN1D
L3703
LNA2_CTL
0
CHINA_OPT
R3701
2SC3052
OPT
Q3704
E
B
C
1K
OPT
R3750
0 . 1 u F
16V
C3725
BLM18PG121SN1D
L3702
10K
OPT
R3754
2.2K
R3737
CHINA_OPT
0 CHINA_OPT R3702
FE_TS_VAL_ERR
4.7K
CHINA_OPT
R3744
0 . 1 u F
16V
C3710
FE_TS_DATA[0-7]
ISA1530AC1
Q3701
CHINA_OPT
E
B
C
100pF
50V
C3707
+5V_TU
IF_P_MSTAR
+3.3V_TU
100pF
50V
C3703
0
CHINA_OPT R3723
0
OPT
R3707
+3.3V_TU
TU_SDA
22pF
50V
OPT
C3716
0 . 1 u F
16V
C3727
DEMOD_SDA
+3.3V_Normal
+3.3V_TU
0 . 1 u F
16V
OPT
C3728
22pF
50V
CHINA_OPT
C3714
0 . 1 u F
16V
C3724
4.7K
CHINA_OPT
R3742
DEMOD_RESET
22pF
50V
OPT
C3715
+5V_TU
+1.2V/+1.8V_TU +3.3V_TU
0 R3749
CONTROL_ATTEN
0
CHINA_OPT R3728
IF_N_MSTAR
0
CHINA_OPT
R3727
0 . 1 u F
16V
C3701
2SC3052
Q3702
CHINA_OPT
E
B
C
BLM18PG121SN1D
L3701 CHINA_OPT
22pF
50V
CHINA_OPT
C3712
TU_SCL
4.7K
R3753
DEMOD_SCL
0
CHINA_OPT R3725
0
CHINA_OPT R3726
0
CHINA_OPT
R3705
+5V_TU
+5V_TU
100
R3732
0 . 0 1 u F
25V
C3709
CHINA_OPT
0 R3760
EU_OPT
0 R3761
EU_OPT
22uF
10V
OPT
C3719
100pF
50V
C3737
0 . 1 u F
16V
C3738
0
R3704 EU_OPT
1.2K
R3740
1.2K
R3741
33 R3735
33 R3736
18pF
50V
C3711
18pF
50V
C3713
220
R3752
220
R3751
470
R3755
TDTJ-S001D
EU_TUNER
TU3702
14
3.3V
13
1.2V
5
AS
12
GND
11
VIDEO
2
BST_CNTL
10
NC
4
NC[RF_AGC]
1
ANT_PWR[OPT]
17
DIF_1
9
S I F
8
NC[IF_TP]
3
+B
16
IF_AGC_CNTL
7
SDA
6
SCL
15
RESET
18
DIF_2
SHIELD
19
100uF
16V
C3705
CHINA_OPT
TDFR-C035D
CN_HORIZONTAL_LG3911
TU3701
1
RF_S/W_CNTL
2
BST_CNTL
3
+B1[+5V]
4
NC[RF_AGC]
5
NC_1
6
SCLT
7
SDAT
8
NC_2
9
S I F
10
NC_3
11
VIDEO
12
GND
13
+ B 2 [ 1 . 2 V ]
14
+ B 3 [ 3 . 3 V ]
15
RESET
16
NC_4
17
SCL
18
SDA
19
ERR
20
SYNC
21
VALID
22
MCL
23
D0
24
D1
25
D2
26
D3
27
D4
28
D5
29
D6
30
D7
31
SHIELD
TDFR-C055D
TU3701-*1
CN_VERTICAL_LG3911
1
RF_S/W_CNTL
2
BST_CNTL
3
+B1[+5V]
4
NC[RF_AGC]
5
NC_1
6
SCLT
7
SDAT
8
NC_2
9
S I F
10
NC_3
11
VIDEO
12
GND
13
+ B 2 [ 1 . 2 V ]
14
+ B 3 [ 3 . 3 V ]
15
RESET
16
NC_4
17
SCL
18
SDA
19
ERR
20
SYNC
21
VALID
22
MCL
23
D0
24
D1
25
D2
26
D3
27
D4
28
D5
29
D6
30
D7
31
SHIELD
22uF
16V
C3722
10uF
16V
C3723
10
EU_OPT
R3767
+3.3V_TU
10K
AP2132
R3708
2 . 2 u F
16V
C3700
0 . 1 u F
50V
C3718
+5V_Normal
AZ1117H-ADJTRE1(EH11A)
EU_OPT
IC3703
2
OUTPUT
3
INPUT
1
ADJ/GND
1/10W
0
CHINA_OPT
R3711
0 . 1 u F
16V
C3717
2 . 2 u F
16V
C3721
+1.2V/+1.8V_TU
10uF
16V
C3720
150
OPT
R3703
10uF
16V
C3706
THERMAL
AP2132MP-2.5TRG1
AP2132
IC3701
3
VIN
2
EN
4
VCTRL
1
PG
5
NC
6
VOUT
7
ADJ
8
GND
9
[ E P ]
1/10W
1
EU_OPT
R3766
10K
SC4215
R3710
SC4215ISTRT
SC4215
IC3701-*1
3
VIN
2
EN
4
NC_2
1
NC_1
5
NC_3
6
VO
7
ADJ
8
GND
10K
AP2132
R3706
20K
R3709
+1.2V/+1.8V_TU
20K
AP2132
R3710-*1
10K
SC4215
R3700
1.2K
EU_OPT
R3768
500
AP2132
L3700
+3.3V_TU
FE_TS_DATA[3]
FE_TS_DATA[6]
FE_TS_DATA[7]
FE_TS_DATA[1]
FE_TS_DATA[4]
FE_TS_DATA[0]
FE_TS_DATA[2]
FE_TS_DATA[5]
VER 1.0
EU/CHINA CAN TUNER
s h o u l d b e g u a r d e d b y g r o u n d
T h e p u l l - u p / d o w n o f L N A 2 _ C T L
is depended on MODLE_OPT_1.
GPIO must be added for FE_BOOSTER_CTL
FE_BOOSTER_CTL
60mA
FE_AGC_SPEED_CTL
LGIT CAN NIM_H/N TUNER for EU & CHINA
close to TUNER
close to TUNER
close to TUNER
C l o s e t o t h e t u n e r
200mA
T h i s w a s b e i n g a p p l i e d t o t h e o n l y c h i n a d e m o d ,
s o t h i s h a s t o b e d e l e t e d i n b o t h m a i n a n d I S D B s h e
P u l l - u p c a n ’ t b e a p p l i e d
because of MODEL_OPT_2
G P I O m u s t b e a d d e d .
C l o s e t o t h e C I S l o t
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
OPTION : RF AGC
c l o s e t o I F l i n e
GP2_Saturn7M
27
BOOSTER : CHINA OPT
R2
R1
R2
S C 4 2 1 5 : V 0 = 0 . 8 ( R 1 + R 2 ) / R 2
380mA
R1
A P 2 1 3 2 : V 0 = 0 . 6 ( R 1 + R 2 ) / R 2
Copyright © 2011 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
LGE Internal Use Only