LG KP105 Service Manual page 89

7. CIRCUIT DIAGRAM
1 2
RADIO
A
1
NC1
C204 100p
2
FM_ANT U202
FMIP
3
RFGND
SI4702-B16
4
GND1
5
FM_RST
_RST
FM_RST
2V8_VBUF
R214
10K
R215
R216
4.7K 4.7K C209
FM_SCL
FM_SDA
FM_32K
R217 47
SPEAKER & RECEIVER
R219 120K
C210 470n R220 10K
RADIO_SPK_L
U204 TPA6205A1ZQVR
C212 470n R222 10K
C3
SPK_N IN-
C215 470n R224 10K
C2
SPK_P IN+
B1
SPK_AMP_EN _SHUTDOWN
C1
BYPASS
R226
100K
R228 120K
C225
220n
D
E
1 2
LGE Internal Use Only
3 4 5
2V8_VBUF
2V8_VBUF
R201 39K
2V8_VBUF
C202
C203
1u 1u
U203 LM4809LD
R204
7 8
VDD VOUT1
15
GND3
R206 20K
C205 0.1u
14 1
LOUT VIN1 R208
13 6
ROUT VOUT2
12 C206 0.1u 5
R207 20K
GND2 VIN2
11
VD
2 3
C207 BYPASS GND
4 9
22n RADIO_AMP_SHDN _SHDN BGND
R211 39K
C208
R212
2V8_VBUF
100K 0.1u
0.1u
VBAT
C211
R221 4.7
REC_N
2.2u
A3
VDD (1608, 10V) L201 22nH
B3
VO+
C217
A1
VO-
15p
L202 22nH
B2
GND
C222
C221
15p NA
R229 4.7
REC_P
3 4 5
6 7
RADIO_SPK_R
AUXOP_FMR
0
FOR RADIO
RADIO_SPK_L
0 HS_REC
RADIO_SPK_R
RADIO_DETECT
R213
27K
RADIO_DETECT
RADIO
NO RADIO
MAIN_MIC
R_S_N
MIC_P
R_S_P
C224
C223
MIC_N
15p NA
- 90 -
8 9 10
2V8_VIO
C201
U201
0.1u 2V8_VIO
DG2735DN-T1-E3
1 10
V+ NO2 RADIO_SPK_L
2 9
NO1 COM2 AUXOP_FML
R202
R203
3 8
COM1 IN2 DNI 330K
R205 FOR RADIO
4 7
DNI
IN1 NC2 HS_REC
5 6
NC1 GND R209
240K
HEADSET_RADIO_SEL
R210
100K
27K
2.7K
VMIC
R218
1K
C213
C214
R223 39p
10u
2.2K
C216
R225
MIC201
100ohm
33nF
C219 1
2
39p
C220
R227
OB4-15L42-C33L
100ohm
33nF
R230 C226 C227
2.2K
39p 39p
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Only for training and service purposes
A
B
C
D