Headset Interface - LG P7200 Service Manual

3.12 Headset Interface

2V5_VMIC
R224
1K
C237
R227
10u
(1608)
2.2K
R229
AUX_MIC_P
100
C239
R231
AUX_MIC_N
R232
0.1u
100
2.2K
(2125)
C244 33u
R234 4.7
AUX_SPK_L
R235 4.7
AUX_SPK_R
C245 33u
(2125)
R236 100
JACK_DETECT
KEY_COL4
(HOOK_DETECT)
C247
1u
2V8_VMEM 2V8_VMEM
C238
39p R225 R226
100K 100K
C248 C249 C250 C251
47p 1u 47p 47p
VA207
Figure 3-29. HEADSET JACK INTERFACE
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3. TECHNICAL BRIEF
Headset jack
CN201
13
15
1
2
3
4
5
6
7
8
R237
9
10 R238
11 R239
12 R240 100
14
16
100
KEY_COL1 (MP3_FF)
100
KEY_COL2 (MP3_REW)
100
KEY_COL3 (MP3_PLAY/PAUSE)
KEY_ROW5