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4. TROUBLE SHOOTING
CIRCUIT
U102
K4
NROM_CS
CS0_N
M3
CS1_N
NRAM_CS
R3
NADV
ADV_N
J6
NWAIT
WAIT_N
P9
ANAMON
T2
BFCLK0
MEM_CLK
K15
FSYS_EN
FSYS_EN
M15
EPN
M16
EPP
R14
HSL
T14
HSR
N16
LSN
N15
LSP
3.5phi HEADSET
1V8_VDD
JACK_DETECT
HP_ROUT
HP_LOUT
R240
EAR_GND
0
HOOK_DETECT
LGE Internal Use Only
C144
C141
C143
C142
DNI
DNI
47p
47p
EPN
EPP
HSR
EPN
HSL
EPP
HSL
HSR
TP04
1V8_VDD
TP03
R248
1M
S
G
Q201
D
R247
100K
R208
10
DNI
FB207
TP04
L204
0.1uH
TP0
L203
0.1uH
R215
R223
C235
C244
DNI
DNI
DNI
DNI
VAUX
1V8_VDD
R241
100K
R222
OUT
IN-
47ohms
4
3
GND
2
VCC
IN+
5
1
C236
U204
120pF
VHSMIC
C242
560pF
HS_MIC_N
C240
10pF
0.022uF
HS_MIC_P
C241
C203
2.2uF
560pF
R239
0
2. TROUBLE SHOOTING
AUDIO AMP SUB SYSTEM & SIGNAL DISTRIBUTOR
VBAT
FB201
120
TP01
U202
TP01
TP02
C212 1u
C2
IN1-
C213 1u
C1
IN1+
U202
C245 1u
D2
IN2-
C246 1u
D1
IN2+
C247 1u
D3
IN3-
C248 1u
C3
IN3+
TP02
Resoldering points
C210
I2C_SCL
2.2u
I2C_SDA
L201
0.1uH
M6
2
1800
M1
FB204
3
FB211
M4F
4
1800
M3
5
FB205
1800
M4
6
M5
1
VA204
VA205
VA206
VA203
R249
100
R226
2.2Kohms
- 92 -
Copyright © 2010 LG Electronics. Inc. All right reserved.
C207
C208
2.2u
0.1u
C5
OUT+
D5
OUT-
A2
C215
HPL
HP_LOUT
A1
47p
HPR
HP_ROUT
C216
C217
0.1u
0.1u
B5
C222 2.2u
CPVDD
C219 2.2u
A3
CPVSS
R201
R204
A4
20
20
CP
C218 2.2u
Headset MIC
A5
CN
1V8_VDD
FB210
220
C211
C209
2.2u
0.1u
R205
EAR_GND
0
C239
47p
L202
FM_ANT
0.1uH
C237
VA207
DNI
R237
EAR_GND
0
J201
Only for training and service purposes
RCV_SPK_P
RCV_SPK_N
C214
47p
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