LG KG271 - Headphone Trouble

4. TROUBLE SHOOTING
- 75 -
4.13 Headphone Trouble
Check Points
-18pin IO connector
-Passive Parts slodering Status
TEST POINT
CIRCUIT DIAGRAM
FOR RADIO
12,13 : CHG
8 : JACK_D
(50V,C,NP0)
9,10 : BATT
4 : EAR_L
(10V,Z,Y5V)
FOR RADIO
I/O CONNECTOR
11 : R/ON
5 : EAR_R
2 : AUDIO
(50V,J,NP0)
(50V,J,NP0)
(2012)
1608
7 : RXD
(TOL:0.25P)
EAR_MIC
6 : TXD
39pC325
VMIC
NAR322
2V8_VIO
0.1u
C317
100K
R324
2V8_VIO
C336
3p
C326 39p
2V8_VIO
10p
C322
21
22
3
4
5
6
7
8
9
HSEJ-18S04-25R
1
10
11
12
13
14
15
16
17
18
19
2
20
100K
CN301
R323
18p
C337
C324 10u
2V8_VIO
VCHARGE
1800FB301
C318
NA
10u
C319
L300
270nH
1
2
3
VBAT
CN302
R316
1.5K
C328
56p
R321 100K
C323 10u
R318
2.2K
39pC321
C327
10u
FB302 1800
R332 0
C320 0.1u
FB300 1800
VBAT
BATT_TEMP
DSR
HS_DET
AUXOP_FML
AUXOP_FMR
RPWRON
RXD
TXD
FM_ANT
AUXIN
AUXIP
CN301
FB301
C321
C322
FB302
FB300