LG GB220 - Earphone Trouble

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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4.10 Earphone Trouble
TEST POINT
CIRCUIT
Figure 4.10.1
R300
R30
2
R301
C303
L301
CN300
47p
C131 C140
1000p
220n
C137
47p
C134
DNI
C132 C133
47p
VMIC
1000p
C160
VUMIC
P13
VMIC
P12
VREF
T10
F9
VDDFS
A16
NC1
T16
NC2
A1
NC3
T1
NC4
MICN1
R12
R13
MICN2
MICP1
T12
T13
MICP2
ACD
R10
AGND
P11
VHSMIC
JACK_DET
MIC_N
MIC_P
HS_MIC_N
HS_MIC_P
16 : D/ TX
17 : D/ RX
14 : DSR
11 : R/ON
9,10 : BATT
15 : VUSB
2 : Headset MIC
6 : USB+
12,13 : CHG
7 : USB-
4 : HSO_L
8 : JACK_D
5 : HSO_R
47p
C329
47p
C328
C327
DNIDNI
R305
C326
100K
C304
10u
298D106X0010M2T
ECTH0005601
VA30 2
VBUS_USB
VBAT
R312 47
L301 1800
27p
C305
R310 47
VHSMIC
C316 2.2u
1V81_VDD
47R313
C318 39p
VCHG
L303 1800
VA30 0
RPWRON
100K
R306
C307
47p
7
8
9
ICVS0505500FR
SEVY0005402
VA30 1
11
12
13
14
15
16
17
18
19
2
20
21
22
3
4
5
6
ENRY0006801
GU041-18P-E1000
CN300
1
10
100K R323
R300
1.5K
1uC319
DSR
UART _RX
UART_TX
0.1uC303
DNI_DIODE_1006 diode
D303
18
R324
C317 39p
27p
C306
2.2
R302
18
R350
2.2KR301
R309
DNI
4.7u
C320
C302 0.1u
L300
270nH
ICVFP10181E301FR
FB300
GND1GND2
INOUT
L302 1800
SFEY0007101
C301
1p
1
D+IC
6
D-
3
D-IC
4
2
GND
5
VBUS
U301 STF203-22-TC
EDTY0006501
D+
C300
0.015u
HOOK_DET
DSR
HP_A_ROUT
HP_A_LOUT
RPWRON
USB_DM
USB_DPUSB_P
USB_DMUSB_N
UART_RX
JACK_DET
UART_TX
FM_ANT
HS_MIC_N
HS_MIC_P
USB_DP