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4. TROUBLE SHOOTING
CIRCUIT
3.5phi HEADSET
1V8_VDD
JACK_DETECT
HP_ROUT
HP_LOUT
C244
DNI
R240
EAR_GND
0
FM Radio(LNA)
ANTPAD_GD880
FEED
ANT402
C486
DNI
LGE Internal Use Only
1V8_VDD
R248
1M
S
G
TP4
Q201
D
R247
100K
R208
10
DNI
FB207
L204
0.1uH
L203
0.1uH
R215
R223
C235
DNI
DNI
DNI
MUIC
1V8_VDD
VBAT
TP8
TP7
C234
0.1u
(10V)
R212
R214
2.2K
DNI
D2
R216
1
A4
USB_DM
R217
1
A5
USB_DP
R203
1
B3
UART_RX
R202
1
A3
UART_TX
A1
D4
D3
A2
I2C_SCL
I2C_SDA
MUIC_INT
TP4
L401
FM_LNA_EN
22n
C430
1u
R421
5.1ohms
R410
24K
C432
330p
3
1
Q401
2
C427
DNI
ZD401
DNI_DIODE_1006
R408
4.7K
TP2
TP1
TP
C237
L201
0.1uH
DNI
R237
0
M6
2
1800
M1
FB204
3
FB211
M4F
4
1800
M3
5
FB205
1800
M4
6
M5
1
VA204
VA205
VA206
VA203
VBUS_USB
TP6
D5
BAT
VB
C5
DN1
COMN1
B5
DP2
COMP2
B4
FB202
1000
U203
U1
UID
U2
B1
R209
2.2K
RES
MIC
C230
2.2u
D1
AUD1
CAP
C229
2.2u
AUD2
C4
GND
C3
ISET
IC
L417
WLAN_RESET
22n
.
R409
270ohms
C489 330p
C431
470n
C428
470n
FM_ANT
- 104 -
Copyright © 2010 LG Electronics. Inc. All right reserved.
C239
47p
L202
FM_ANT
0.1uH
VA207
EAR_GND
J201
C228
0.1u
(25V)
MUIC_DM
MUIC_DP
MUIC_ID
C231
1.5n
TP5
C488
1u
R422
5.1ohms
R423
R424
24K
270ohms
C491
3
1
Q402
470n
2
C490
R425
470n
4.7K
Only for training and service purposes
FM_ANT_2
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