Tuner Circuit Diagram - LG DP372D Service Manual

7. TUNER CIRCUIT DIAGRAM

12
11
R701 R701
NC/100R/0R NC/100R/0R
Q701 Q701
C C
NC/BC848C NC/BC848C
B B R703NC/75R R703NC/75R
1
10
R707NC/0R R707NC/0R E E
R708 R708
NC/220R NC/220R
TV_GND
M08TPT-PS-E M08TPT-PS-E R7090R R7090R
9
TU701 TU701
11
VIDEO_OUT
AUDIO_OUT C726 C726
10
AUDIO_OUT
10uF/10V 10uF/10V
9
AFC
8
AGC
7
VCC
8 6
SIF
C711 C711
5
SCL
104 104
4
SDA
TV_GND
3
AS
2
NC
1
NC
R715 R715
12
RF
R716330R R716330R
7
C712 C712
R717 R717 47p 47p
0/NC 0/NC
6
ANT703 ANT703
NC/U.FL-R-SMT NC/U.FL-R-SMT
ANT702 ANT702
5
5
MCX MCX
3 1
JP502 JP502
4 CKX-3.5-02 CKX-3.5-02
2
3
1
4
5
JP503 JP503
3
CKX-3.5-02 CKX-3.5-02
2
3
1
4
5
2
1
A B C D
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
D701 D701
SS24 SS24
1
TV_5V
BAT_OUT
C708 C708
104 104
CE704 CE704 + +
TV_GND 100uF/25V 100uF/25V
1 2
CM705 CM705
220uF/10V/NC 220uF/10V/NC
TV_VIDEO
R710 R710 0/NC 0/NC C731 C731 105 105
50 50
FB701 FB701 TV_5V C732 C732 105 105
R713 R713
CM702 CM702
+ + NC/0 NC/0
220uF/16V 220uF/16V
TV_CTRL
330R 330R TV_SCL
R718 R718
TV_SDA
GND
C713 C713
0/NC 0/NC
47p 47p
E F G H
L701 L701
22uH 22uH
2
C701 C701 C702 C702
10uF/16V 10uF/16V
104 104
U701 U701
MP1411 MP1411 C706 104 C706 104
1 10
NC1 SS
R714 R714 1K 1K
2 9
BS EN
C707 C707
3 8
NC2 COMP
4 7
IN FB
5 6
SW GND
C710 C710 C722 C722
224 224 103/NC 103/NC C709 OPEN C709 OPEN
R704 R704 R705 R705
R719 R719 NC NC TV_AUDIO_R
10K/1% 10K/1% 5.6K 5.6K
R720 R720 NC NC TV_AUDIO_L
U702 U702
NC/U_74HC4053D NC/U_74HC4053D
C733 C733 105 105 AUDIO_R
12 14
X0 X
13
X1
C734 C734 105 105 AUDIO_L
15
Y
2
Y0
TV_5V
1 4
Y1 Z
5
Z0
3
Z1
TV_5V
16
VCC
11
A
10 8
B GND
9
C
6
EN
7
VEE
I J K L
3-39 3-40
L702 L702
10uH 10uH
C703 C703 + + CE701 CE701 C704 C704 + + CM701 CM701 C723 C723
220uF/16V 220uF/16V 220uF/16V 220uF/16V 10uF/10V 10uF/10V
224 224
104 104
TV_CTRL
393 393 R702 10K R702 10K
R706 39K R706 39K
TV_CTRL
TV_CTRL
R711 R711 10K 10K TV_SDA
TV_SDA
R712 R712 10K 10K TV_SCL
TV_SCL
BAT_OUT
BAT_OUT
MPEG I/F
TV_AUDIO_R
TV_AUDIO_R
TV_AUDIO_L
TV_AUDIO_L
TV_VIDEO
TV_VIDEO
GND
AUDIO_R
AUDIO_R
AUDIO_L
AUDIO_L
M N O P Q
TV_5V
C705 C705
104 104
MALATA MALATA MALATA
07.TUNER 07.TUNER 07.TUNER
Wednesday, January 02, 2008 Wednesday, January 02, 2008 Wednesday, January 02, 2008
R S T
LGE Internal Use Only