Ear Jack - LG U8290 Service Manual

MSM6250 BLK
FB502 FB503
39p 39p
C621 C622
MICBIAS_LDO_1.8V
VREG_MSMP_2.6V
MIC2P
MIC2N
33u
HEADPHONE_L
HEADPHONE_R
EAR_SENSE*
MULTI_ADC
KEY_ROW(0)
KEY_ROW(1)
KEY_ROW(2)
KEY_ROW(3)
KEY_COL(6)
C654
39p
Figure 3.10.11.2-2 Audio Section scheme
Near to MSM

EAR JACK

10K R625
22n C102
C115
22n
C626
33u C627
0 R624
VA8
C653
39p
AVLC14S02050
D503
- 67 -
3. TECHNICAL BRIEF
MIC_Feedback
MICFBP
MICINN
MICOUTP
C108 0.1u C100
470K
R100
MICOUTN
C107 0.1u C105 0.1u
MICINP
MICFBN
To prevent from
CN304
13
TDMA noise.
15
1
R640 600
2
R641 600 3
4
5
6
7
8
9
10
11
12
14
16
D599
180K
0.1u
R101
C101 0.015u
C106 0.015u
180K
R104