LG DP270B, Service Manual

Page: 45 / 53

3-43 3-44
POWER I/F
OFF-PAGE CONNECTION
MPEG I/F
AV I/F
FM_MUTE
FM_SCS
MR_OUT
ML_OUT
SCLK
SDO
FM_G
ND
GND
3.3V
FM_SCS
SDO
SCLK
FM_MUTE
ML_OUT
MR_OUT
FM_MUTE
FM+3.3V
FM+3.3V
FM+3.3V
FM+3.3V
3.3V
FM+3.3V
GND 2,3,4,5,6,7
3.3V 2,3,4,7
FM_MUTE 2
FM_SCS 2
SCLK 2,6
SDO 2,6
ML_OUT 5
MR_OUT 5
Document Number
08.FM-TX(OPTION)
LG & MALATA
Monday, January 15, 2007
Document Number
08.FM-TX(OPTION)
LG & MALATA
Monday, January 15, 2007
Document Number
08.FM-TX(OPTION)
LG & MALATA
Monday, January 15, 2007
= About 2V, FM usually normal work
Audio signal is about 200mV
There is no antenna,
just long pattern.
D
AF2301P
1
2
S G 3
C
SMBT3906
1
2
E B 3
C810
1000pF
C810
1000pF
R807
100
R807
100
C830
0.1uF
C830
0.1uF
R816
82K
R816
82K
C
808
2200pF
C
808
2200pF
CE802
220uF/6.3V
CE802
220uF/6.3V
C812
27pF
C812
27pF
C827
10uF/
10V[
1206]
C827
10uF/
10V[
1206]
C
811
1000pF
C
811
1000pF
R821
0
R821
0
C8
04
0.
01uF
C8
04
0.
01uF
Q803
AF2301P
Q803
AF2301P
1
3 2
C
817
150pF
C
817
150pF
C833
1uF C833
1uF
C819
NC
C819
NC
R811
22K
R811
22K
D801
KV-1471E(TOKO)
D801
KV-1471E(TOKO)
1 2
L802
2.7uH[0805]
L802
2.7uH[0805]
R8
15 20K
R8
15 20K
C823
3.3pF
C823
3.3pF
R818
47K
R818
47K
C816
10uF/10V[1206]
C816
10uF/10V[1206]
C
815
0.
01uF
C
815
0.
01uF
C802
330pF
C802
330pF
C822
150pF
C822
150pF
R809
47K
R809
47K
L805
56nH[0603]
L805
56nH[0603]
Q804
SMBT3906
Q804
SMBT3906
C821
10uF/10V[1206]
C821
10uF/10V[1206]
R802 10K R802 10K
R
823
10K
R
823
10K
R
820
0
R
820
0
C807
0.1uF
C807
0.1uF
C814
10uF/10V[1206]
C814
10uF/10V[1206]
R
824
20K
R
824
20K
C813
10uF/10V[1206]
C813
10uF/10V[1206]
R817
3.3K
R817
3.3K
C832
0.1uF
C832
0.1uF
C831
0.1uF
C831
0.1uF
C
803
10uF/
10V[
1206]
C
803
10uF/
10V[
1206]
R826
10K R826
10K
R806
0
R806
0
X801 7.
6M
H
z
X801 7.
6M
H
z
R812
10K R812
10K
R
819
10K
R
819
10K
C
824
10uF/
10V[
1206]
C
824
10uF/
10V[
1206]
R
813 10K
R
813 10K
E801
ANTENNA
E801
ANTENNA
1
R
805 0
R
805 0
R
804 4.
7K
R
804 4.
7K
R822
10K
R822
10K
Q801
2SC3356
Q801
2SC3356
2
1
3
C825
10uF/10V[1206]
C825
10uF/10V[1206]
R810
6.8K
R810
6.8K
C
806
1000pF
C
806
1000pF
C
828
2200pF
C
828
2200pF
C801
0.047uF/50V
C801
0.047uF/50V
C820
27pF C820
27pF
L801
S711-489(NC)
L801
S711-489(NC)
7
1 2
3
6
4
5
C805
20pF
C805
20pF
R803
3.3K
R803
3.3K
C829
2200pF
C829
2200pF
CE801
100uF/10V
CE801
100uF/10V
1 2
R814
1K
R814
1K
R808
6.8K
R808
6.8K
C
809
33pF C
809
33pF
R801
0
R801
0
C818
82pF
C818
82pF
C826
150pF
C826
150pF
R827
5.1K R827
5.1K
L804
FB
L804
FB
Q802
2SC3356
Q802
2SC3356
3
2
1
R825
5.1K
R825
5.1K
U801
BH1418FV
U801
BH1418FV
R_
CH_
IN
1
R_
TIME
2
R
_LPF
3
FIL
TE
R
4
SI
G_OU
T
5
GN
D
6
PLL_OU
T
7
VC
C
8
RF
_OSC
10
RF_G
N
D
11
RF_O
U
T
12
VC
C
_PLL
13
XOU
T
14
XI
N
15
C_
E
N
17
CL
K
18
DA
TA
19
MUTING
20
AD
J
21
L_LPF
22
L_T
IM
E
23
L_
CH_
IN
24
NC
9
NC
16
H:FM MUTE
L:FM NO MUTE
6. FM-TX (OPTION) CIRCUIT DIAGRAM