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7. CIRCUIT DIAGRAM
1
2
3
A
B
C
D
E
SPEAKER PHONE AMPLIFIER POWER
VBAT
F
(MM_GPIO_1)
SPK_PHONE_PWREN
C427
C428
27p
1u
G
H
1
2
3
LGIC(42)-A-5505-10:01
4
5
6
HEADSET JACK
2V8_MM
R404
100
AUX_MIC_P
R405
100
C403
0.1u
AUX_MIC_N
MAX4764EBC+T
U701
R406
R432
0
A4
A1
R408
(GPO_8)
HP_EN
IN1
NO1
C4
C1
R431
100
IN2
NO2
JACK_DETECT
B1
C405
100u
VCC
(GPIO_9)
A2
HP_ROUT
COM1
C2
B4
COM2
GND
C404
100u
A3
B2
HP_LOUT
NC1
EP1
C3
B3
NC2
EP2
C434
1u
R433
R434
NA
NA
SPEAKER AMPLIFIER
VBAT
R415
R416
C411
0.01u
SND_HPLOUT
0
80.6K
U401
TPA2005D1ZQYR
R418
R419
C412
0.01u
D1
B4
SND_HPROUT
IN-
VDD1
C4
0
80.6K
VDD2
B1
C414
C415
NC
C1
NA
NA
IN+
A4
VO-
(GPIO_17)
R421
A1
D4
LOUD_SPK_EN
_SD
VO+
0
C417
C422
33u
NA
C424
22n
U403
NLAS4684FCT1G
2V85_SPWR
(GPIO_40)
R428
C2
HP_SRC_SEL
IN1
U402
BH2JNB1WHFV
0
1
5
A2
STBY
NC
IN2
2
6
GND
BGND
3
4
C3
VIN
VOUT
HP_LOUT
COM1
A3
C429
C430
HP_ROUT
COM2
0.01u
10u
4
5
6
7
8
2V5_VMIC
2V8_VMEM
C401
C402
CN401
10u
39p
13
1
2
3
4.7
4
4.7
5
6
7
8
9
C406
C407
C408
C409
C410
10
1u
47p
1u
47p
47p
11
12
14
2V5_VMIC
MAIN MICROPHONE
L401
C416
33uH
39p
SND_SPK+
R422
R423
SND_SPK-
MIC_IN+
L402
100
0
33uH
C418
C419
C420
1u
1u
39p
R426
MIC_IN-
100
AUDIO PATH SWITCH
CONNECTED PORT
LOW
NC PORT
2V8_MM
2V8_MM
HIGH
NO PORT
U404
NLAS4684FCT1G
(GPIO_39)
(GPIO_46)
R429
C4
C2
C4
SND_HPLOUT
SND_SRC_SEL
CODEC_HPLOUT
SPK_SRC_SEL
NO1
IN1
NO1
0
A4
A2
A4
NO2
SND_HPROUT
IN2
NO2
CODEC_HPROUT
C1
C3
C1
NC1
AUX_OUT_L
SND_HPLOUT
COM1
NC1
MIDI_HPLOUT
A1
A3
A1
NC2
AUX_OUT_R
SND_HPROUT
COM2
NC2
MIDI_HPROUT
C431
C432
1u
1u
Approved
Iss.
Notice No.
Date
Name
7
8
- 144 -
9
10
11
R409
100
KEY_COL2
(HOOK_DETECT)
R410
100
KEY_COL3
(MP3_FF)
R411
100
KEY_COL4
(MP3_REW)
R413
100
KEY_COL5
(MP3_PLAY/PAUSE)
R414
680
KEY_ROW0
C413
10u
MIC_P
C421
39p
MIC_N
C425
C426
39p
39p
VBAT
U405
NLAS4684FCT1G
R430
C2
C4
SND_SPK+
IN1
NO1
0
A2
A4
IN2
NO2
SND_SPK-
C3
C1
SPK+
COM1
NC1
MIDI_SPK+
A3
A1
SPK-
COM2
NC2
MIDI_SPK-
C433
1u
Section
Date
Sign & Name
Sheet/Sheets
MODEL
KG920(MAIN)
2006/
Designer
SANG KYU SONG
03/11
Checked
DRAWING
AUDIO PART
NAME
DRAWING
VER_1.0
LG Electronics Inc.
NO.
9
10
11
12
A
B
C
E
F
G
4/7
H
12
LG Electronics Inc.
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