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4.10 Earphone Trouble
TEST POINT
CIRCUIT DIAGRAM
2V5_VMIC
R224
1K
2V8_VMEM
C237
C238
R227
10u
39p
R225
(1608)
2.2K
100K
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
C248
C249
C250
C251
47p
1u
47p
47p
2V8_VMEM
R226
100K
Headset jack
CN201
13
15
1
2
3
4
5
6
7
8
9
10
11
12
14
16
VA207
- 87 -
4. TROUBLE SHOOTING
U202
MAX4684EBC_T
MIDI_HP_R
MIDI_HP_L
AUX_OUT_R
AUX_OUT_L
R237
100
KEY_COL1
(MP3_FF)
R238
100
KEY_COL2
(MP3_REW)
R239
100
KEY_COL3
(MP3_PLAY/PAUSE)
R240 100
KEY_ROW5
R223
3V0_VOD
C235
1u
U202
C4
C2
HEADSET_PATH_SEL
NO1
IN1
A4
A2
NO2
IN2
C1
C3
NC1
COM1
AUX_SPK_R
A1
A3
AUX_SPK_L
NC2
COM2
R223
100K
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