LG KP260 - Earphone Trouble

LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
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4.12 Earphone Trouble
TEST POINT
CIRCUIT
CN300
IC200
TP4
TP3
TP1
TP2
R305 100K
3
4
5
6
7
8
9
GU041-18P
1
10
11
12
13
14
15
16
17
18
19
2
20
21
22
CN300
R309
47
4.7u C319
C313
100p
FB300
330p
C357
C316
VCHG_IN
47p
FB301FB302
20
R308
C315
18p
1u
C321
R304 100K
VBAT
47p C320
VBUS_IN
C314
18p
100KR302
FB303
1u
C317
2V8_VEXT
HS_OUT_R
HS_OUT_L
HS_MIC
JACK_DETECT
USC1
DSR
USBDP
USBDM
RPWRON
USC2
Figure 4.12
Figure 4.11
C534
0.1uC318
27p
C324
2V5_VMIC
C323
27p
R314
2.2K
R31620
C325
10u
C330
100p
C322 0.1u
R312
1.5K
HS_MIC
AUXIN
AUXIP
ACC_DET
AUDIO AMP
EUSY0360201
1uC208
C218 1u
C207 1u
D4
B4
RXIN-
SCL
C3
SDA
B3
B1
VDD
A3
VSS
B2
BIAS
C1N
A4
C1P
A5
D3
GND
INA1
D2
INA2
D1
C2
INB1
C1
INB2
C4
PGND
C5
PVDD
RXIN+
MAX9877A
IC200
1uC209
1uC213
1u
C206
1u
C201
1uC214
1uC212
C203
C225
1u
1u
C200
1u
ABB_P
AUXOP_L
AUXOP_R
MM_L
FM_L
FM_R
MM_R
I2C_SCL
I2C_SDA
ABB_N
TP4
TP2
TP1
TP3