LG KP105 - Circuit Diagram

LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 80 -
RADIO
RADIO
NO RADIO
RADIO_DETECT
27K
FOR RADIO
2.7K
2V8_VBUF
FOR RADIO
VOUT2
_SHDN
4
22n C207
U203 LM4809LD
9
BGND
BYPASS
23
GND
7
VDD
VIN1
1
VIN2
5
8
VOUT1
6
DNI
R202
C209
0.1u
0.1u C208
R209 240K
R214
10K
47R217
2V8_VIO
C206
FM_RST
0.1u
C205 0.1u
DG2735DN-T1-E3 U201
COM1
3
COM2
9
GND
6
4
IN1
8
IN2
NC1
5
7
NC2
2
NO1
10
NO2
1
V+
TP201
R212 100K
2V8_VIO
2V8_VBUF
2V8_VBUF
2V8_VBUF
DNI
20KR207
R205
39KR201
330K R203
4.7K
R216
100pC204
2V8_VBUF
0R204
RADIO_AMP_SHDN
R206 20K
100K R210
FM_INT
R215
4.7K
0R208
1u
C202
1u C203
_SEN
R213
27K
19
18
GPIO2
GPIO3
17
14
LOUT
NC1
1
20
NC2
PGND
21
9
RCLK
3
RFGND
13
ROUT
SCLK
7
SDIO
8
16
VA
11
VD
VIO
10
5
_RST
6
U202
SI4702-B16
2
FMIP
4
GND1 GND2
12
GND3
15
GPIO1
0.1u
C201
R211 39K
RADIO_DETECT
HS_REC
HEADSET_RADIO_SEL
AUXOP_FMR
AUXOP_FML
HS_REC
RADIO_SPK_R
RADIO_SPK_L
FM_32K
FM_SDA
FM_SCL
RADIO_SPK_R RADIO_SPK_L
FM_ANT
RADIO_AMP_SHDN
FM_INT
RADIO_AMP_SHDN
FM_RST
9,10 : BATT
FOR RADIO
5 : EAR_R
4 : EAR_L
1608
7 : RXD
12,13 : CHG
8 : JACK_D
2 : AUDIO
6 : TXD
11 : R/ON
FOR RADIO
10p
C305
DNI
R316
L301
270nH
21
22
3
4
5
6
7
8
9
GU041-18P-E1000
1
10
11
12
13
14
15
16
17
18
19
2
20
CN301
FM_ANT
CIRCUIT DIAGRAM
<FM Radio Block> <FM Radio Antenna matching>
TP3
TP7
TP8
TP9
TP10
TP2
TP1
TP6TP5
TP8