LG KG920 - Headphone Trouble

4. TROUBLE SHOOTING
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4.14 Headphone Trouble
Figure 4-82.
Figure 4-85.
Figure 4-83. Figure 4-84.
C405
C404
C401
U100
U404
U405
U403
TEST POINT
(GPIO_9)
(MP3_PLAY/PAUSE)
(HOOK_DETECT)
(MP3_FF)
(MP3_REW)
EVL5M02200
VA404
680R414
VA401
EVL5M02200
4.7R408
C401
10u
100R405
EVLC18S02015
VA409 VA410
EVLC18S02015
C409
47p
100R413
VA403
EVL5M02200
2V8_VMEM
14
2
3
4
5
6
7
8
9
CN401
1
10
11
12
13
100R410
R406 4.7
39p
C402
100R411
1K
R401
R409 100
EVLC18S02015
VA407
0.1uC403
C410
47p
R402
100K
100R404
VA406
EVLC18S02015
47p
C407 C408
1u
VA408
EVLC18S02015
100R431
VA405
EVL5M02200
R403
2.2K
EVL5M02200
VA402
C406
1u
2V5_VMIC
2.2K
R412
KEY_ROW0
KEY_COL5
KEY_COL4
KEY_COL3
KEY_COL2
JACK_DETECT
AUX_MIC_N
AUX_MIC_P
NC PORT
(GPIO_39)
CONNECTED PORT
AUDIO PATH SWITCH
HIGH
LOW
NO PORT
1u
(GPIO_40)
C431
C3
COM1
A3
COM2
B1
GND
C2
IN1
A2
IN2
C1
NC1
A1
NC2
C4
NO1
A4
NO2
B4
V+
U404
NLAS4684FCT1G
NLAS4684FCT1G
U403
COM1
C3
COM2
A3
GND
B1
IN1
C2
IN2
A2
NC1
C1
NC2
A1
NO1
C4
NO2
A4
V+
B4
0
R429
C432
1u
2V8_MM
2V8_MM
R428
0
SND_HPROUT
SND_HPLOUT
SND_SRC_SEL
HP_LOUT
HP_ROUT
HP_SRC_SEL
AUX_OUT_L
AUX_OUT_R
SND_HPLOUT
SND_HPROUT
MIDI_HPROUT
CODEC_HPROUT
CODEC_HPLOUT
MIDI_HPLOUT
CIRCUIT