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LGE Internal Use Only
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
ͽͶ͑ͺΟΥΖΣΟΒΝ͑ΆΤΖ͑ΟΝΪ
XW[VX[^
CIRCUIT
DNI
FB207
R237
0
FB211
1800
J201
2
3
4
5
6
1 M5
M4
M3
M4F
M1
M6
VA207
C239
47p
DNI
C235
100K
R247
DNI
R215
1V8_VDD
10
R208
Q201
S
G
D
1M
R248
I
N
D
42
2
R
VA203
1800
FB205
0
R240
DNI
C244
00
81
30
2
BF
L201
0.1uH
FB204
1800
L202
0.1uH
1V8_VDD
R223
DNI
VA204
0.1uH
L203
VA205
L204
0.1uH
VA206
DNI
C237
HP_LOUT
HP_ROUT
JACK_DETECT
EAR_GND
EAR_GND
FM_ANT
3.5phi HEADSET
TP1
TP4
R202
1
1
R203
R209
2.2K
C228
0.1u
2.2K
R212
VBUS_USB
C229
2.2u
DNI
R214
2.2u
C230
1000
FB202
U203
B5
C5
2
B
1
C
2
C
C3
A2
C4
D3
D1
D4
A1
B1
A3
B4
B3
A5
A4
D5
D2
BAT
VB
DN1
DP2
U1
UID
U2
RES
MIC
AUD1
CAP
AUD2
GND
ISET
IC
L
C
S
A
D
S
T
NI
COMN1
COMP2
C231
1.5n
1V8_VDD
VBAT
0.1u
C234
R216
1
1
R217
MUIC_INT
I2C_SCL
I2C_SDA
USB_DP
USB_DM
UART_TX
UART_RX
MUIC_ID
MUIC_DM
MUIC_DP
MUIC
(25V)
(10V)
60
4
R
n0
72
ANTPAD_GD880
ANT402
FEED
70
4
R
n0
01
Q401
2
1
3
C430
1u
24K
R410
22n
L401
C486
DNI
R422
5.1ohms
C491
470n
C490
470n
R425
4.7K
270ohms
R424
C489 330p
330p
C432
R409
270ohms
4.7K
R408
470n
C428
470n
C431
L417
22n
R423
24K
C427
DNI
5.1ohms
R421
1u
C488
Q402
2
1
3
ZD401
DNI_DIODE_1006
FM_LNA_EN
WLAN_RESET
FM_ANT_2
FM_ANT
.
FM Radio(LNA)
TP2
TP
TP6
TP7
TP8
TP4
TP5