VOL_ADJ
VOL_MUTE
GAIN_SELECT
HP_DETECT
AUDIO/R+
MODE_SELECT
AUD_R
VOL_MUTE
AUD_L
MODE_SELECT
AUDIO/R-
AUD_R
SHUTDOWN
AD5V
AUDIO/L-
AUDIO/L+
AUD_L
AUDIO_ON
GAIN_SELECT
SHUTDOWN
V19V
V5A
AUDIO/R-
VOL_ADJ
AUDIO/L+
AUDIO/R+
AUDIO/L-
AUDIO_ON
V19V
AU5V
AU5V
AU5V
AU5V
AU5V
AU5V
V5A
V19V
AU5V
Title
Size
Document Number
Rev
Date:
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Title
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Document Number
Rev
Date:
Sheet
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Title
Size
Document Number
Rev
Date:
Sheet
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1
AUDIO IN JACK
SHUTDOWN : Nomally Low
ON
GAIN SELECT :H
0V
Place near J1 Jack
OV
VOL_MUTE: MCU CONTROL
Low Frequency input -6db point at 241HZ
3.3V
MODE SELECT :H
3.3V
Add new circuit to reduce DC plug out pop noise
R151
R151
R3
R3
+
C17
+
C17
C6
C6
1
VOL1
VOL1
R13
R13
C8
C8
1
L+1
L+1
C10
C10
C13
C13
R24
R24
C19
C19
C9
C9
1
R-1
R-1
L2
L2
L4
L4
R15
R15
C18
C18
R1
R1
R20
R20
+
C1
+
C1
L1
L1
1
3
2
Q12
Q12
1
2
ZD13
ZD13
R11
R11
R9
R9
1
AUD_R1
AUD_R1
1
3
2
Q1
Q1
2
3
1
J1
J1
R16
R16
C2
C2
C3
C3
R7
R7
Mode
4
Mute
5
VDD
6
DC Vol
7
GND
1
Right Dock
9
Right In
10
Beep In
11
Left In
12
Left Dock
13
GND
8
Left Out +
15
Left Out -
17
VDD
27
GND
14
HP Sense
21
Bypass
22
GND
20
Right Gain 1
24
Right Gain 2
25
Right Out -
26
Right Out +
28
VDD
16
Shutdown
2
Gain Select
3
Left Gain 2
18
Left Gain 1
19
GND
23
GND_PAD
29
U1
U1
C12
C12
R8
R8
R12
R12
L3
L3
R10
R10
C5
C5
R6
R6
1
AUD_L1
AUD_L1
C4
C4
1
L-1
L-1
C16
C16
R21
R21
C7
C7
R4
R4
C11
C11
R2
R2
R149
R149
R5
R5
1
VOL_ADJ1
VOL_ADJ1
R14
R14
1
3
2
Q2
Q2
1
AUD_G1
AUD_G1
1
R+1
R+1
C15
C15
R17
R17
1
AU5V1
AU5V1
Audio
80
ViewSonic
Corporation
Co
nfidential
-
Do
Not
Copy
VA
912/b