LG GB210 - Earphone Trouble

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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
TEST POINT
CIRCUIT
Figure 4.11
TP2
TP1
TP3
TP4
CN300
U201
4.12 Earphone Trouble
R31320
27p
C331
R306
1.5K
2V5_VMIC
C326 0.1u
0.1uC325
C337
100p
10u
C332
27p
C330
R309
2.2K
ACC_DET
HS_MIC
AUXIN
AUXIP
ENRY0006801
C315
33p
C320 4.7u
FB303
FB301
C316
33p
C314
100p
C322 47p
VCHG_IN
2V8_VEXT
FB300
L301
270nH
20
R304
R302 100K R301 100K
15
16
17
18
19
2
20
21
22
3
4
5
6
7
8
9
CN300
GU041-18P-E1000
1
10
11
12
13
14
100KR300
C318
1u
VBAT
FB302
C317
47p
R305
47
C323
1u
C321
330p
VBUS_IN
10p
C301
HS_OUT_R
HS_OUT_L
HS_MIC
USBDM
RPWRON
USC2
JACK_DETECT
FM_ANT
USC1
DSR
USBDP
AUDIO AMP
EUSY0360201
C212 1u
C217 1u
C209 1u
C210 1u
C229
1u
1uC211
1uC220
1u
C202
C
1
u
C206
C222 1u
1u
PVDD
RXIN+
D4
B4
RXIN-
SCL
C3
SDA
B3
B1
VDD
A3
VSS
B2
BIAS
C1N
A4
C1P
A5
D3
GND
H
P
H
P
INA1
D2
INA2
D1
C2
INB1
C1
INB2
OU
T
OU
C4
PGND
C5
MAX9877AEWP_TG4
5
U201
1u
C201
1u
C216
FM_R
MM_R
I2C_SCL
I2C_SDA
ABB_N
ABB_P
AUXOP_L
AUXOP_R
MM_L
FM_L
TP4
TP2
TP1
TP3