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4. TROUBLE SHOOTING
4.13 Headphone Trouble
TEST POINT
Check Points
-18pin IO connector
-Passive Parts slodering Status
CIRCUIT DIAGRAM
TP2
C301
HS_MIC_N
C304
HS_MIC_P
2V8_VIO
2V8_VIO
R303
R304
NA
100K
C308
AUXOP_FML
C309
AUXOP_FMR
TXD
RXD
2V8_VIO
R306
100K
DSR
LGE Internal Use Only
VMIC
R301
1.5K
R302
2.2K
0.1u
C302
C303
NA
10u
0.1u
C307
39p
2V8_VIO
R305
100K
10u
10u
FB306
FB307
HS_DET
C310
C311
39p
39p
RPWRON
FB309
C315
4.7u
(1608)
VBAT
TP3
U201
TP4
TP2
R301
C308 C309
2V8_VIO
C201
U201
0.1u
DG2735DN-T1-E3
1
V+
NO2
2
RADIO_SPK_R
NO1
COM2
3
AUXOP_FMR
COM1
IN2
R205
4
FOR RADIO
DNI
IN1
NC2
5
HS_REC
NC1
GND
TP5
VCHARGE
VBAT
CN301
21
FOR RADIO
19
1
FB301
1800
2
3
FB302
1800
4
FB303
1800
5
6
7
FB304
8
9
10
11
FB308
12
13
14
(25V, X5R, 1608)
15
C313
C314
16
C316
C317
1u
56p
17
18p
39p
18
20
22
GU041-18P-E1000
Copyright © 2008 LG Electronics. Inc. All right reserved.
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TP5
CN301
FB303
FB302
FB301
TP4
2V8_VIO
10
RADIO_SPK_L
9
AUXOP_FML
R202
R203
8
DNI
330K
FOR RADIO
EAR_MIC
7
HS_REC
6
R209
I/O CONNECTOR
240K
HEADSET_RADIO_SEL
R210
100K
FM_ANT
C305
R316
L301
DNI
10p
270nH
1608
FOR RADIO
FOR RADIO
2 : AUDIO
4 : EAR_L
TP6
5 : EAR_R
6 : TXD
7 : RXD
TP7
8 : JACK_D
9,10 : BATT
11 : R/ON
12,13 : CHG
TP1
Only for training and service purposes
TP1
TP6
TP5
TP3
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