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7. CIRCUIT DIAGRAM
1
2
ACOUSTIC & MIDI
A
U204
C200
C205
10u
1u
MAX4684EBC_T
C4
C2
SPK_P
NO1
IN1
A4
A2
SPK_N
NO2
IN2
C1
C3
REC_P
NC1
COM1
A1
A3
REC_N
NC2
COM2
B
C
26M_MIDI
YMU762C-QZ
R210
NA
1
13MHz
CLK1
4
_MIDI_RESET
_RST
30
ADD00
A0
31
_RD
_RD
29
_MIDI_CS
_CS
5
NC
28
_WR
_WR
3
_MIDI_IRQ
_IRQ
27
DATA08
D0
26
DATA09
D1
25
DATA10
D2
24
DATA11
D3
23
DATA12
D4
22
DATA13
D5
21
DATA14
D6
2V85_VCAM
2V85_VCAM
20
C222
DATA15
D7
1000p
R218
3.3K
6
PLLC
9
VREF
D
C224
0.1u
32
IOVDD
7
VDD
8
C228
C229
VSS
1u
1u
E
1
2
LGIC(42)-A-5505-10:01
3
4
5
SPK_SEL
100K
R631
SPK_RCV_P
SPK_RCV_N
C213
SPK
0.1u
U203
R211
20K
11
HPOUT_R
10
C214
HPOUT_L
0.01u
R212
12
EQ1
33K
13
EQ2
C218
R214
120K
270p
14
EQ3
2
LED
19
MTR
17
SPOUT1
SPK_P
SPK_N
18
SPOUT2
VBAT
15
SPVDD
C227
0.1u
16
SPVSS
Iss.
3
4
5
6
7
8
2V5_JACK
CLOSE TO EARJACK
R200
1K
R201
R202
C201
20K
1.5K
AUXIN
0.1u
C202
R204
C206
C203
NA
39p
22u
NA
2V8_VEXT
2V8_VEXT
R205
C207
1M
39p
AUXOP
5
4
VIN-
1
VCC
JACK_DETECT
AUXIP
AUXIP
OUT
3
VIN+
GND
C209
0.1u
U201
2
LMV7291MGX-NOPB
R208
330K
JACK_DETECT
L
REMOVE
H
INSERT
2V5_VMIC
R213
1K
R215
C219
39p
2.2K
R216
100
R217
0
VINNORP
C220
39p
C223
0.1u
R219
100
VINNORN
R220
2.2K
Section
Sign & Name
Date
Designer
Checked
Approved
Notice No.
Date
Name
LG Electronics Inc.
- 88 -
9
10
2V8_VEXT
2V5_JACK
U202
1
4
GND
NC
R203
0
2
3
HOOK_DET
Vin
VOUT
C216
NCP563Q25T1
C217
1u
1u
C208
10u
R206
4.7
5
1
R207
4.7
3
4
2
J200
C212
39p
C215
10u
MIC200
C221
1
2
39p
OB4-15L42-C33L
CLOSE TO MIC
Sheet/Sheets
MODEL
BUTTERYFLY(KG225)
2/6
DRAWING
AUDIO
NAME
DRAWING
VER-1.1
NO.
LG Electronics Inc.
A
A
B
B
C
D
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