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1
2
A
R132
47K
Q7
BC856
R195
100k
AGND
R193
LINE / MIC / GUITAR IN
15K
1
B
3
2
4
8
5
9
10
6
11
7
J13
CHGND
AGND
C
MIC/LINE
S2A
1
2
3
SWDS-11L-C2
GUITAR
R189
10M
A+12V
D
1
2
3
A+12V
+50V
R133
47K
Q10
A+12V
BC856
R196
100k
R120
R121
R194
AGND
D3
D19
15K
15K
15K
MMBD4148
MMBD4148
C52
R71
47uF/6.3V
10 ohm
C53
R70
47uF/6.3V
10 ohm
C152
R190
4.7k
22uF/16V
C153
R191
4.7k
22uF/16V
D20
D21
MMBD4148
MMBD4148
A-12V
4
5
6
S2B
SWDS-11L-C2
C163
22pF
2
-
1
R186
U12A
C164
3.3uF,25V
R90
10 ohm
3
+
TLO72
D23
6
-
BAV99
7
R187
U12B
R91
10 ohm
5
+
A-12V
TLO72
R192
1M
AGND
3
4
5
A+12V
Mic Gain =
C61
0.1uF
(((Rg/2)//Re) + Rf)/(((Rg/2)//Re)*2)
Rg= resistance between emitters
GAIN
AGND
R72
3.92k 1%
2
P5
5KC
C60
R188
10 ohm
2200uF/6.3V
INVERTING INPUT
Q16
Q18
MBT4403
MBT4403
R74
C54
1.21k 1%
100pF
PREAMP
AGND
R76
2.00k 1%
R78
10 ohm
330 ohm
C138
10 ohm
A-12V
Approval
Check
Design
REV
4
5
6
7
C151
47pF
R73
3.92k 1%
R88
7.5k 1%
6
R87
7.5k 1%
-
R86
7.5k 1%
7
U8B
5
R89
3.32k 1%
+
MC33079
R83
7.5k 1%
AGND
NON-INVERTING INPUT
C55
R75
1.21k 1%
100pF
AGND
C139
15pF
R79
1K
2
-
1
R80
1K
3
U8A
+
MC33079
C150
R77
15pF
2.00k 1%
AGND
0.1uF
AGND
Title:
LXAN AUDIO
Size
Number
A3
Date :
2013/11/29
File Name:
AUDIO2.SchDoc
DATE
Description
6
7
8
A
B
INPUT_L
C
D
Revision
PC13A022
0
Sheet
2
of
6
Design By :
ALESIS
8
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