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L12STEREO2.Sch
Titel
Size
File:
Date:
Drawn By:
Sheet
Revision
Model No:
12-Jul-2003
BOW.
MAIN INPUT STAGE (CH9-CH12)
8
3 of
ALTO L12
VER030710
A3
8
4
U11C
4580M
8
4
U12C
4580M
8
4
U10C
4580M
8
4
U13C
4580M
C131
100N
C132
100N
C133
100N
C134
100N
C135
100N
C136
100N
C137
100N
C138
100N
+VCC
-VCC
PCB# L12MN1.PCB
EQ HI (12KHz)
VR40A
B50K
R180
6K8
VR43A
B50K
R179
6K8
LO(80Hz)
R197
47K
C104
47u/25V
5
6
7
U14B
4580M
R188
1M
C113
22P
R160
10K
VR41A
B50K
R169
22K
MID-LO(500Hz)
R145
1K8
C108
12n(M)
R146
1K8
C112
47n(M)
C110
3.3n(M)
C106
1n(M)
C107
12n(M)
C122
47u/25V
3
2
1
U14A
4580M
R173
220K
C109
22P
R135
220K
R149
1K8
VR42A
B50K
R147
1K8
HI-MID(3KHz)
R193
12K
C111
3.3n(M)
R187
1M
EQ HI (12KHz)
VR40B
B50K
R182
6K8
VR43B
B50K
R181
6K8
LO(80Hz)
R198
47K
C105
47u/25V
5
6
7
U15B
4580M
R189
1M
C121
22P
R161
10K
VR41B
B50K
R170
22K
MID-LO(500Hz)
R151
1K8
C116
12n(M)
R152
1K8
C120
47n(M)
C118
3.3n(M)
C114
1n(M)
C115
12n(M)
C123
47u/25V
3
2
1
U15A
4580M
R174
220K
C117
22P
R136
220K
R150
1K8
VR42B
B50K
R148
1K8
HI-MID(3KHz)
R194
12K
C119
3.3n(M)
R190
1M
R209
5K1
3
2
1
U17A
4580M
VR39A
10KD
R227
12K
C125
22P
C127
47u/25V
LEVEL
BAL
R162
5K1
R163
5K1
R214
5K1
5
6
7
U17B
4580M
VR39B
10KD
R228
12K
C126
22P
C128
47u/25V
LEVEL
R165
10K
R164
10K
R215
10K
R216
10K
LEFT-BUS
RIGHT-BUS
2
1
3
SW26A
PS-22E85L
5
4
6
SW26B
PS-22E85L
8
7
9
SW20C
PS-42E85L
5
4
6
SW20B
PS-42E85L
AFL-L
AFL-R
R231
15K
R232
15K
R224
4K7
VR32
W50K
AUX2
VR33
W50K
R217
4K7
AUX1
2
1
3
SW16A
PS-22E85L
5
4
6
SW16B
PS-22E85L
2
1
3
SW20A
PS-42E85L
AUX1/2 PRE/POST
R166
8K2
SOLO(PFL)
11
10
12
SW20D
PS-42E85L
D4
BAS316
LOGIC
LD6
YEL
(SOLO)
R234
2K2
-VCC
(LOGIC=2.0V or 0.5V)
LOGIC
CH9-12 (STEREO)
2
1
3
SW22A
PS-22E85L
5
4
6
SW22B
PS-22E85L
SUB1
SUB2
R220
10K
R221
10K
2
1
3
SW24A
PS-22E85L
SUB3
R222
10K
5
4
6
SW24B
PS-22E85L
SUB4
R223
10K
R219
4K7
VR34
W50K
AUX4
VR35
W50K
R218
4K7
AUX3
2
1
3
SW18A
PS-42E85L
8
7
9
SW18C
PS-42E85L
LD8
RED
R200
3K3
+VCC
PGND
MUTE
5
4
6
SW18B
PS-42E85L
8
4
U14C
4580M
8
4
U15C
4580M
8
4
U16C
4580M
C139
100N
C140
100N
C141
100N
C142
100N
C143
100N
C144
100N
INS-CH11
INS-CH12
C98
47u/25V
3
2
1
U11A
4580M
R131
1K2
C102
22P
R127
1K
C100
47u/25V
VR23A
W50K
C99
47u/25V
5
6
7
U11B
4580M
R132
1K2
C103
22P
R128
1K
C101
47u/25V
VR23B
W50K
EQ HI (12KHz)
VR24A
B50K
R176
6K8
VR27A
B50K
R175
6K8
LO(80Hz)
R195
47K
C73
47u/25V
5
6
7
U12B
4580M
R184
1M
C82
22P
R153
10K
VR25A
B50K
R167
22K
MID-LO(500Hz)
R137
1K8
C77
12n(M)
R138
1K8
C81
47n(M)
C79
3.3n(M)
C75
1n(M)
C76
12n(M)
C83
47u/25V
3
2
1
U12A
4580M
R171
220K
C78
22P
R133
220K
R140
1K8
VR26A
B50K
R139
1K8
HI-MID(3KHz)
R191
12K
C80
3.3n(M)
R183
1M
EQ HI (12KHz)
VR24B
B50K
R178
6K8
VR27B
B50K
R177
6K8
LO(80Hz)
R196
47K
C74
47u/25V
5
6
7
U13B
4580M
R186
1M
C91
22P
R158
10K
VR25B
B50K
R168
22K
MID-LO(500Hz)
R141
1K8
C86
12n(M)
R142
1K8
C90
47n(M)
C88
3.3n(M)
C84
1n(M)
C85
12n(M)
C92
47u/25V
3
2
1
U13A
4580M
R172
220K
C87
22P
R134
220K
R144
1K8
VR26B
B50K
R143
1K8
HI-MID(3KHz)
R192
12K
C89
3.3n(M)
R185
1M
R201
5K1
3
2
1
U16A
4580M
VR38A
10KD
R226
12K
C95
22P
C97
47u/25V
LEVEL
BAL
R154
5K1
R159
5K1
R202
5K1
5
6
7
U16B
4580M
VR38B
10KD
R225
12K
C94
22P
C96
47u/25V
LEVEL
R156
10K
R155
10K
R203
10K
R204
10K
LEFT-BUS
RIGHT-BUS
2
1
3
SW25A
PS-22E85L
5
4
6
SW25B
PS-22E85L
8
7
9
SW19C
PS-42E85L
5
4
6
SW19B
PS-42E85L
AFL-L
AFL-R
R229
15K
R230
15K
R211
4K7
VR28
W50K
AUX2
VR29
W50K
R210
4K7
AUX1
2
1
3
SW15A
PS-22E85L
5
4
6
SW15B
PS-22E85L
2
1
3
SW19A
PS-42E85L
AUX1/2 PRE/POST
R157
8K2
SOLO(PFL)
11
10
12
SW19D
PS-42E85L
D3
BAS316
LOGIC
LD5
YEL
(SOLO)
R233
2K2
-VCC
(LOGIC=2.0V or 0.5V)
LOGIC
2
1
3
SW21A
PS-22E85L
5
4
6
SW21B
PS-22E85L
SUB1
SUB2
R205
10K
R206
10K
2
1
3
SW23A
PS-22E85L
SUB3
R207
10K
5
4
6
SW23B
PS-22E85L
SUB4
R208
10K
R213
4K7
VR30
W50K
AUX4
VR31
W50K
R212
4K7
AUX3
2
1
3
SW17A
PS-42E85L
8
7
9
SW17C
PS-42E85L
LD7
RED
R199
3K3
+VCC
PGND
MUTE
5
4
6
SW17B
PS-42E85L
INS-CH9
INS-CH10
C67
47u/25V
3
2
1
U10A
4580M
R129
1K2
C71
22P
R125
1K
C69
47u/25V
VR44A
W50K
C68
47u/25V
5
6
7
U10B
4580M
R130
1K2
C72
22P
R126
1K
C70
47u/25V
VR44B
W50K
8
4
U17C
4580M
C145
100N
C146
100N
R657
120R
R658
120R
R659
120R
R660
120R
R661
120R
R662
120R
R663
120R
R664
120R
R669
15K
R670
15K
R671
15K
R672
15K
R724
4K7
R723
4K7
VR36
W50K
R705
4K7
R702
10K
R699
20K
R703
10K
R697
100K
R698
100K
C460
1uF
R700
8K2
LD41
LED-2P
TR4
HR
R701
150R
1
2
3
4
8
U18A
393
5
6
7
U18B
393
R706
27K
R707
1K
3
2
1
U20A
4580M
綠
紅
D19
BAS316
D25
BAS316
C461
1uF
D26
BAS316
+RVCC
TR1
7002
R704
10K
C462
470P
R716
4K7
R713
10K
R710
20K
R714
10K
R708
100K
R709
100K
C463
1uF
R712
8K2
LD42
LED-2P
TR6
HR
R711
150R
1
2
3
4
8
U19A
393
5
6
7
U19B
393
R717
27K
R718
1K
5
6
7
U20B
4580M
綠
紅
D27
BAS316
D28
BAS316
C464
1uF
D29
BAS316
+RVCC
TR5
7002
R715
10K
C465
470P
R726
4K7
R725
4K7
VR37
W50K
R751
5K1
R752
5K1
R753
5K1
R754
5K1
+RVCC
+RVCC
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
C504
47u/25V
C505
47u/25V
C506
47u/25V
C507
47u/25V
Summary of Contents for L-12
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