Fm-Tx (Option) Circuit Diagram - LG DP270B Service Manual

6. FM-TX (OPTION) CIRCUIT DIAGRAM

C825 C825
10uF/10V[1206] 10uF/10V[1206]
ML_OUT
MR_OUT
C816 C816
10uF/10V[1206] 10uF/10V[1206]
3.3V
R826 R826
C830 C830 10K 10K
0.1uF 0.1uF
R825 R825
5.1K 5.1K
FM_MUTE Q804 Q804
SMBT3906 SMBT3906
H:FM MUTE
C832 C832
L:FM NO MUTE
0.1uF 0.1uF
2
C
1 B E
SMBT3906
R801 R801
0 0
R808 R808
C821 C821
6.8K 6.8K
R818 R818
10uF/10V[1206] 10uF/10V[1206]
47K 47K
U801 U801
BH1418FV BH1418FV
R809 R809
C813 C813
47K 47K
10uF/10V[1206] 10uF/10V[1206]
R810 R810
6.8K 6.8K
R806 R806
0 0
Audio signal is about 200mV
FM+3.3V
Q803 Q803
AF2301P AF2301P L804 L804
3 2
FB FB
R827 R827
5.1K 5.1K
CE802 CE802 C831 C831
220uF/6.3V 220uF/6.3V 0.1uF 0.1uF
C833 C833
1uF 1uF
2
D
FM+3.3V
3 1 G S 3
AF2301P R814 R814
1K 1K
C807 C807
0.1uF 0.1uF
FM_MUTE
SDO
SCLK
FM_SCS
C812 C812
27pF 27pF
FM+3.3V
C820 C820
27pF 27pF
FM+3.3V L801 L801
S711-489(NC) S711-489(NC)
1 2
4 3
5 6
L805 L805
7
56nH[0603] 56nH[0603]
C805 C805
20pF 20pF
D801 D801
C818 C818
2 1
82pF 82pF
R822 R822 KV-1471E(TOKO) KV-1471E(TOKO)
10K 10K
R812 R812
10K 10K
= About 2V, FM usually normal work
C814 C814
10uF/10V[1206] 10uF/10V[1206]
C802 C802
330pF 330pF
R803 R803
3.3K 3.3K
R817 R817
C829 C829
C801 C801
3.3K 3.3K
0.047uF/50V 0.047uF/50V
2200pF 2200pF
2 1
R807 R807
CE801 CE801
100 100
100uF/10V 100uF/10V
1
Q802 Q802
2SC3356 2SC3356
3-43 3-44
E801 E801
FM+3.3V ANTENNA ANTENNA
L802 L802
2.7uH[0805] 2.7uH[0805]
There is no antenna,
just long pattern.
C823 C823
3.3pF 3.3pF
C810 C810
R811 R811 1000pF 1000pF
22K 22K
Q801 Q801
1
2SC3356 2SC3356
C826 C826
R816 R816
82K 82K 150pF 150pF
R821 R821
C819 C819 0 0
NC NC
OFF-PAGE CONNECTION
LG & MALATA LG & MALATA LG & MALATA
Document Number Document Number Document Number
08.FM-TX(OPTION) 08.FM-TX(OPTION) 08.FM-TX(OPTION)
Monday, January 15, 2007 Monday, January 15, 2007 Monday, January 15, 2007
3.3V
3.3V 2,3,4,7
GND
GND 2,3,4,5,6,7
POWER I/F
FM_MUTE
FM_MUTE 2
FM_SCS
FM_SCS 2
SCLK
SCLK 2,6
SDO
SDO 2,6
MPEG I/F
ML_OUT
ML_OUT 5
MR_OUT
MR_OUT 5
AV I/F