Alto S-8 User manual

Service Manual
www.altoproaudio.com
Version: 1.2
ISSUE:2003.9.21
Model: S-8
8 Channel Mixing Console

CONTENTS
1. Specification
2. Block Diagram
3. Schematic Diagram
4. Printed Circuit Board
5. Wiring Diagram
6. Test Procedure
7. Electrical Parts List
8. Exploded Views & Mechanical Parts List
9. Notes

2.1
2. 功能特性介紹說明(FEATURE)
The S-8 is 5 mono MIC/LINE channels with MIC PREAMPS plus 2 stereo channels perfect for
keyboards, MIDI equipment or other stereo sound sources and a 2-track input/output for recording and
playback in a mixer small enough to carry in your board luggage: meet the ALTO S-8. In spite of its size,
you can find great 3-band equalizers in each channel plus switchable low-cut filters in the mono
channels, 2 AUX sends, 2 stereo returns, phantom power and accurate peak LED and level meters.
Plus of course our ultra low noise circuitry and exceptional build quality.
- 5 MIC Input Channels with gold plated XLRs and balanced Line Inputs.
- 2 Stereo Input Channels with balanced TRS Jacks.
- Ultra-low noise discrete Mic Preamps with +48 V Phantom Power.
- 2 additional multifunctional Stereo Line Inputs.
- Extremely high headroom – offering more dynamic range.
- Balanced Inputs for highest signal integrity.
- Warm, natural 3-band EQ on each channels.
- Peak LEDs and switchable low-Cut Filter on each Channels.
- 2 AUX Sends per channel for external effects and monitoring.
- Balanced TRS and XLR outputs, Control Room and Headphone Outputs.
- 2-Track Inputs assignable to Main Mix, Control Room / Headphone Outputs.
- Highly accurate 12 segment Bar graph Meters.
- Inserts on MIC channels.
- performance and excellent noise figures
- Rugged construction ensures long life even under the most demanding conditions
- Manufactured under ISO9001 certified management system
Features:
Function description notes
Channel inputs 8
Mono channels 4(5)
Stereo channels 2
MIC PREAMPS 4
EQ (mono channels) 3-band plus low-cut
EQ (stereo channels) 3-band
Aux sends 2
Stereo aux returns 2
2-track input/output 1
Phantom power +48 V

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ALTO MIXING CONSOLE
11of
S-8 BLOCK DIAGRAM VER020521
A3
MONO INPUT CHANNELS ( 1-4 )
2
1
3
MIC IN
+48V
3-BAND EQ
12K2.5K80
HI PASS
2
1
3LO CUT
SG/OL
LEFT-BUS RIGHT-BUS AUX-1 AUX-2
RIGHT-BUS
LEFT-BUS
AUX-1
AUX-2
STEREO INPUT CHANNELS (5-8)
EQ 12K2.5K80
LEFT-BUS
RIGHT-BUS
AUX-1
AUX-2
LEFT-BUS
RIGHT-BUS
STEREO AUX RETURN 2
21
3
EFX TO AUX-1
21
3
RIGHT-BUS
LEFT-BUS
AUX-1
AUX-1
AUX-1
AUX SEND
AUX-2
MAIN OUT
LEFT-BUS
RIGHT-BUS
2
1
3
2TK TO MIX
2
1
3
RIGHT-BUS
LEFT-BUS
TAPE IN
RIGHT
2-TRACK
21
3
2TK TO CTRL ROOM
21
3
PHONES OUTPUT
LEFT METER
RIGHT METER
75Hz
+/-15db
3-BAND EQ
12K2.5K80
+/-15db
3c
5e
1a
4d
2b
LEFT
3c
5e
1a
4d
2b
RIGHT
MAIN MIX
AUX SEND1
T
R
S
AUX SEND2
T
R
S
MAIN MIX LEFT
T
R
S
MAIN MIX RIGHT
T
R
S
CONTROL ROOM OUTPUT
LEFT
T
R
S
RIGHT
T
R
S
PHONES
T
R
S
& PHONES
CONTROL ROOM
LEFT
TAPE OUT
2
1
3
2
1
3
LEVEL
AUX RETURN2
STEREO AUX RETURN 1
3c
5e
1a
4d
2b
LEFT(MONO)
3c
5e
1a
4d
2b
RIGHT
AUX RETURN1
-
+
T
R
S
RN
TN
T
R
S
RN
TN
T
R
S
RN
TN
T
R
S
RN
TN
PAN
PHANTOM
LINE IN
GAIN
-
+
POWER
-
+
-
+
-
+
LO MID HI
1 2
1 2
AUX1
AUX2
LEVEL
POST
PRE
BALANCE
AUX1
AUX2
LEVEL
LO MID HI
SG/OL
3c
5e
1a
4d
2b
LEFT(MONO)
3c
5e
1a
4d
2b
RIGHT
T
R
S
RN
TN
T
R
S
RN
TN
-
+
-
+
2
1
3
MIC5 IN
+48V
PHANTOM GAIN
-
+
POWER
CHANNEL 5,6 ONLY
3c
5e
1a
4d
2b
INSERT
T
R
S
RN
TN
MIC GAIN:0~60dB
LINE IN TRIM:+15dB~-45dB

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Date: Drawn By: Sheet
RevisionModel No:
19-Sep-2003 KEVIN LIN.
INPUT STAGE ( CH1-CH4 )
41of
ALTO S-8 VER020815
A2
R13
4R7
R14
4R7
C6
1n
C5
1n
C51
1000u/10V
R11
4R7
VR1
O10K
R12
1K50
R50
2K49 3
21
U2A
NJM4580M
R46
5K11
C49
22P
C85
47u/25V
5
67
U2B
NJM4580M
R131
62K
R136
1K3
R177
20K
R176
20K
C86
47u/25V
C70
0.22u/50V
C71
0.22u/50V
C72
0.22u/50V
R149
6K8
1
2
3
SW1A
PS-22E85L
4
5
6
P
SW1B
PS-22E85L
LOCUT
2
1
3
4
X5
JY-5042-030G
3c
5e
1a
4d
2b
X6
JY-6351G-02-250
3c
5e
1a
4d
2b
X1
JY-6351G-02-250
EQHI
12KHZ
C131
18n(M) VR2
B50K
R151
6K8
VR4
B50K
R150
6K8
LO
R47
10K
C87
47u/25V
5
67
U3B
NJM4580M
R220
1M
C179
22P
R212
1K1
VR3
B50K
R137
1K3
MID
R196
910R
C155
12n(M)
R197
910R
C139
33n(M) C140
33n(M)
C171
12n(M)
C163
18n(M)
C88
47u/25V
R285
5K1
VR6
W50K
AUX-1
R228
47K
R248
4K7
C195
2.2u/50V R152
6K8
TR2
BR
TR1
BR
R264
1K5 +VCC
LD1
RED
R236
22K
3
21
U3A
NJM4580M
VR8
W50K
PEAK
C89
47u/25V R256
3K9
R270
36K
C180
22P
VR5
W50K
C90
47u/25V
R284
5K1
AUX-2
LEVEL
AUX-POST
VR7A
JQ10K
VR7B
JQ10K
R287
5K1
R286
5K1
LEFT-BUS
RIGHT-BUS
PAN
PGND
AUX-PRE
T
R
S
RN
TN
T
R
S
RN
TN
80HZ
2.5K
GND-INS
INSERT1
C1
330P
C15
10n
R388
470R
R45
2K49
C29
47u/63V
C30
47u/63V
R29
6K34
R30
6K34
C20
22u/35V
C19
22u/35V
R2
6K81
R1
6K81
3
21
U5A
NJM4580M
R54
5K11
C54
22P
C91
47u/25V
5
67
U5B
NJM4580M
R132
62K
R138
1K3
R179
20K
R178
20K
C93
47u/25V
C73
0.22u/50V
C74
0.22u/50V
C75
0.22u/50V
R153
6K8
1
2
3
SW2A
PS-22E85L
4
5
6
P
SW2B
PS-22E85L
LOCUT
2
1
3
4
X7
JY-5042-030G
3c
5e
1a
4d
2b
X8
JY-6351G-02-250
3c
5e
1a
4d
2b
X2
JY-6351G-02-250
EQHI
12KHZ
C132
18n(M) VR10 B50K
R155
6K8
VR12
B50K
R154
6K8
LO
R55
10K
C94
47u/25V
5
67
U6B
NJM4580M
R221
1M
C181
22P
R213
1K1
VR11
B50K
R139
1K3
MID
R198
910R
C156
12n(M)
R199
910R
C141
33n(M) C142
33n(M)
C172
12n(M)
C164
18n(M)
C95
47u/25V
R289
5K1
VR14
W50K
AUX-1
R229
47K
R249
4K7
C196
2.2u/50V R156
6K8
TR4
BR
TR3
BR
R265
1K5 +VCC
LD2
RED
R237
22K
3
21
U6A
NJM4580M
VR16
W50K
PEAK
C96
47u/25V R257
3K9
R271
36K
C183
22P
VR13
W50K
C98
47u/25V
R288
5K1
AUX-2
LEVEL
AUX-POST
VR15A
JQ10K
VR15B
JQ10K
R291
5K1
R290
5K1
LEFT-BUS
RIGHT-BUS
PAN
PGND
AUX-PRE
T
R
S
RN
TN
T
R
S
RN
TN
80HZ
2.5K
GND-INS
INSERT2
3
21
U8A
NJM4580M
R62
5K11
C58
22P
C92
47u/25V
5
67
U8B
NJM4580M
R133
62K
R140
1K3
R182
20K
R180
20K
C100
47u/25V
C76
0.22u/50V
C77
0.22u/50V
C78
0.22u/50V
R157
6K8
1
2
3
SW3A
PS-22E85L
4
5
6
P
SW3B
PS-22E85L
LOCUT
2
1
3
4
X9
JY-5042-030G
3c
5e
1a
4d
2b
X10
JY-6351G-02-250
3c
5e
1a
4d
2b
X3
JY-6351G-02-250
EQHI
12KHZ
C133
18n(M) VR18
B50K
R159
6K8
VR20
B50K
R158
6K8
LO
R63
10K
C101
47u/25V
5
67
U9B
NJM4580M
R222
1M
C182
22P
R214
1K1
VR19
B50K
R141
1K3
MID
R200
910R
C157
12n(M)
R201
910R
C143
33n(M) C144
33n(M)
C173
12n(M)
C165
18n(M)
C103
47u/25V
R293
5K1
VR22
W50K
AUX-1
R230
47K
R250
4K7
C197
2.2u/50V R160
6K8
TR6
BR
TR5
BR
R266
1K5 +VCC
LD3
RED
R238
22K
3
21
U9A
NJM4580M
VR24
W50K
PEAK
C97
47u/25V R258
3K9
R272
36K
C184
22P
VR21
W50K
C106
47u/25V
R292
5K1
AUX-2
LEVEL
AUX-POST
VR23A
JQ10K
VR23B
JQ10K
R295
5K1
R294
5K1
LEFT-BUS
RIGHT-BUS
PAN
PGND
AUX-PRE
T
R
S
RN
TN
T
R
S
RN
TN
80HZ
2.5K
GND-INS
INSERT3
3
21
U11A
NJM4580M
R67
5K11
C59
22P
C99
47u/25V
5
67
U11B
NJM4580M
R134
62K
R142
1K3
R183
20K
R181
20K
C108
47u/25V
C79
0.22u/50V
C80
0.22u/50V
C81
0.22u/50V
R161
6K8
1
2
3
SW4A
PS-22E85L
4
5
6
P
SW4B
PS-22E85L
LOCUT
2
1
3
4
X11
JY-5042-030G
3c
5e
1a
4d
2b
X12
JY-6351G-02-250
3c
5e
1a
4d
2b
X4
JY-6351G-02-250
EQHI
12KHZ
C134
18n(M) VR26
B50K
R163
6K8
VR28
B50K
R162
6K8
LO
R71
10K
C102
47u/25V
5
67
U12B
NJM4580M
R223
1M
C185
22P
R215
1K1
VR27
B50K
R143
1K3
MID
R202
910R
C158
12n(M)
R203
910R
C145
33n(M) C146
33n(M)
C174
12n(M)
C166
18n(M)
C104
47u/25V
R298
5K1
VR30
W50K
AUX-1
R231
47K
R251
4K7
C198
2.2u/50V R164
6K8
TR8
BR
TR7
BR
R267
1K5 +VCC
LD4
RED
R239
22K
3
21
U12A
NJM4580M
VR32
W50K
PEAK
C105
47u/25V R259
3K9
R273
36K
C186
22P
VR29
W50K
C107
47u/25V
R297
5K1
AUX-2
LEVEL
AUX-POST
VR31A
JQ10K
VR31B
JQ10K
R296
5K1
R299
5K1
LEFT-BUS
RIGHT-BUS
PAN
PGND
AUX-PRE
T
R
S
RN
TN
T
R
S
RN
TN
80HZ
2.5K
GND-INS
INSERT4
LINE IN1
LINE IN2
LINE IN3
LINE IN4
MIC 1
MIC 2
MIC 3
MIC 4
84
U3C
NJM4580M
84
U6C
NJM4580M
84
U2C
NJM4580M
C203
100n
C201
100n
C204
100n
C202
100n
+VCC
-VCC
C205
100n
C206
100n
84
U5C
NJM4580M
U1~ U12=
84
U8C
NJM4580M
84
U11C
NJM4580M
84
U12C
NJM4580M
84
U9C
NJM4580M
S8-PU1
S8-PU1.SCH
S8-DSP
S8-DSP.SCH
S8-IN2
S8-IN2.SCH
PH PWR
1
CN1A
5PIN 1
CN2A
5PIN
1
CN4A
5PIN
2
CN1B
5PIN
2
CN4B
5PIN
3
CN1C
5PIN
3
CN4C
5PIN
4
CN1D
5PIN
4
CN4D
5PIN
5
CN4E
5PIN
1
CN3A
5PIN
2
CN2B
5PIN
2
CN3B
5PIN
3
CN2C
5PIN
3
CN3C
5PIN
4
CN2D
5PIN
4
CN3D
5PIN
5
CN3E
5PIN
GND-INS
5
CN1E
5PIN 5
CN2E
5PIN
GND-INS
J2
POST
(PRE)
J1
POST
(PRE)
J3
POST
(PRE)
J4
POST
(PRE)
C287
100n
C288
100n
C289
100n
C290
100n
C291
100n
C292
100n
C293
100n
C294
100n
C295
100n
C296
100n
C297
100n
C298
100n
C299
100n
C300
100n
C301
100n
C302
100n
C303
100n
C304
100n
(SOLTON 1K2)用
TR15
HR
TR16
A1316
R15
1K50
-VCC
+VCC
R52
2K49
R51
2K49
C16
10n
R389
470R
TR25
HR
TR26
A1316
-VCC
+VCC
TP1
TP2
TP3
TP4
TP27
TP28
TP29
TP30
L1
0R0
3
21
U1A
NJM4580M
5
67
U1B
NJM4580M
C48
22P
C50
22P
R403
5K11
R402
5K11
R58
2K49
-VCC
R57
2K49
TR35
HR
+VCC
R53
2K49
D4
BAS316
+VCC
R28
20K
-VCC
R417
10K0
R418
10K0
R404
5K11
C57
22P
84
U1C
NJM4580M
84
U4C
NJM4580M
84
U7C
NJM4580M
84
U10C
NJM4580M
R48
4R7
R49
4R7
C8
1n
C7
1n
C52
1000u/10V
R398
4R7
VR9
O10K
R16
1K50
R60
2K49
C2
330P
C17
10n
R390
470R
R59
2K49
C32
47u/63V
C33
47u/63V
R31
6K34
R32
6K34
C23
22u/35V
C21
22u/35V
R4
6K81
R3
6K81
PH PWR
TR17
HR
TR18
A1316
R17
1K50
-VCC
+VCC
R65
2K49
R64
2K49
C35
10n
R391
470R
TR27
HR
TR28
A1316
-VCC
+VCC
L2
0R0
3
21
U4A
NJM4580M
5
67
U4B
NJM4580M
C60
22P
C61
22P
R406
5K11
R405
5K11
R94
2K49
-VCC
R91
2K49
TR36
HR
+VCC
R56
2K49
D5
BAS316
+VCC
R40
20K
-VCC
R419
10K0
R420
10K0
R407
5K11
C62
22P
R19
4R7
R20
4R7
C10
1n
C9
1n
C53
1000u/10V
R399
4R7
VR17
O10K
R18
1K50
R61
2K49
C3
330P
C31
10n
R392
470R
R127
2K49
C34
47u/63V
C36
47u/63V
R33
6K34
R34
6K34
C26
22u/35V
C25
22u/35V
R6
6K81
R5
6K81
PH PWR
TR19
HR
TR20
A1316
R21
1K50
-VCC
+VCC
R66
2K49
R129
2K49
C38
10n
R393
470R
TR29
HR
TR30
A1316
-VCC
+VCC
L3
0R0
3
21
U7A
NJM4580M
5
67
U7B
NJM4580M
C64
22P
C82
22P
R409
5K11
R408
5K11
R144
2K49
-VCC
R126
2K49
TR37
HR
+VCC
R90
2K49
D6
BAS316
+VCC
R42
20K
-VCC
R421
10K0
R422
10K0
R410
5K11
C63
22P
R24
4R7
R25
4R7
C12
1n
C11
1n
C55
1000u/10V
R400
4R7
VR25
010K
R22
1K50
R128
2K49
C4
330P
C40
10n
R394
470R
R191
2K49
C37
47u/63V
C39
47u/63V
R35
6K34
R36
6K34
C28
22u/35V
C27
22u/35V
R8
6K81
R7
6K81
PH PWR
TR21
HR
TR22
A1316
R23
1K50
-VCC
+VCC
R130
2K49
R379
2K49
C44
10n
R395
470R
TR31
HR
TR32
A1316
-VCC
+VCC
L4
0R0
3
21
U10A
NJM4580M
5
67
U10B
NJM4580M
C84
22P
C110
22P
R413
5K11
R412
5K11
R380
2K49
-VCC
R165
2K49
TR38
HR
+VCC
R135
2K49
D7
BAS316
+VCC
R43
20K
-VCC
R423
10K0
R424
10K0
R411
5K11
C83
22P
MIC GAIN=-10~-60dB
LINE IN GAIN=+10~-40dB
C319
47u/25V
C318
47u/25V
C320
47u/25V
C321
47u/25V

1 2 3 4 5 6 78
A
B
C
D
8
7654321
D
C
B
A
S8-IN2.Sch
Titel
Size
File:
Date: Drawn By: Sheet
RevisionModel No:
19-Sep-2003 KEVIN LIN.
INPUT STAGE ( CH5-CH8)
42of
ALTO S-8 VER020815
A2
2
1
3
4
X13
JY-5042-030G
3c
5e
1a
4d
2b
X14
JY-6351G-02-250
EQHI
12KHZ
C135
18n(M) VR34A
B50K
R167
6K8
VR36A
B50K
R166
6K8
LO
R96
10K
C111
47u/25V
3
21
U16A
NJM4580M
R224
1M
C187
22P
R216
1K1
VR35A
B50K
R145
1K3
MID
R204
910R
C159
12n(M)
R205
910R
C147
33n(M) C148
33n(M)
C175
12n(M)
C167
18n(M)
C112
47u/25V
R312
5K1
VR38
W50K
AUX-1
R232
47K
R254
4K7
C199
2.2u/50V R170
6K8
TR10
BR
TR9
BR
R268
1K5 +VCC
LD5
RED
R244
22K 3
21
U17A
NJM4580M
VR40A
W50K
PEAK
C113
47u/25V R260
3K9 R281
36K
C188
22P
VR37
W50K
C116
47u/25V
R313
5K1
AUX-2
LEVEL
AUX-POST
VR39A
JQ10K
VR39B
JQ10K
R311
5K1
R310
5K1
LEFT-BUS
RIGHT-BUS
BAL
PGND
AUX-PRE
T
R
S
RN
TN
80HZ
2.5K
LINE IN5/6
MIC 5
3c
5e
1a
4d
2b
X15
JY-6351G-02-250
T
R
S
RN
TN
LEFT(MONO)
RIGHT
3
21
U15A
NJM4580M
R108
10K
C66
22P
C117
47u/25V
R105
10K
C227
22P
R101
18K
C275
100P
R102
18K
C273
100P
5
67
U15B
NJM4580M
R109
10K
C67
22P
C118
47u/25V
R106
10K
C228
22P
R103
18K
C276
100P
R104
18K
C274
100P
R107
10K
R110
10K
EQHI
12KHZ
C136
18n(M) VR34B
B50K
R169
6K8
VR36B
B50K
R168
6K8
LO
R111
10K
C119
47u/25V
5
67
U16B
NJM4580M
R225
1M
C190
22P
R217
1K1
VR35B
B50K
R146
1K3
MID
R206
910R
C160
12n(M)
R207
910R
C149
33n(M) C150
33n(M)
C176
12n(M)
C168
18n(M)
C120
47u/25V
80HZ
2.5K
R192
20K
R193
20K
R97
10K
R98
10K
R233
47K
R245
22K 5
67
U17B
NJM4580M
VR40B
W50K
C114
47u/25V R261
3K9
R280
36K
C189
22P
C115
47u/25V
LEVEL
R100
10K
R99
10K
EQHI
12KHZ
C137
18n(M) VR41A
B50K
R172
6K8
VR43A
B50K
R171
6K8
LO
R120
10K
C124
47u/25V
3
21
U19A
NJM4580M
R226
1M
C191
22P
R218
1K1
VR42A
B50K
R147
1K3
MID
R208
910R
C161
12n(M)
R209
910R
C151
33n(M) C152
33n(M)
C177
12n(M)
C169
18n(M)
C127
47u/25V
R317
5K1
VR45
W50K
AUX-1
R235
47K
R255
4K7
C200
2.2u/50V R173
6K8
TR12
BR
TR11
BR
R269
1K5 +VCC
LD6
RED
R246
22K 3
21
U20A
NJM4580M
VR47A
W50K
PEAK
C121
47u/25V R262
3K9 R283
36K
C192
22P
VR44
W50K
C130
47u/25V
R314
5K1
AUX-2
LEVEL
AUX-POST
VR46A
JQ10K
VR46B
JQ10K
R316
5K1
R315
5K1
LEFT-BUS
RIGHT-BUS
BAL
PGND
AUX-PRE
80HZ
2.5K
EQHI
12KHZ
C138
18n(M) VR41B
B50K
R175
6K8
VR43B
B50K
R174
6K8
LO
R125
10K
C125
47u/25V
5
67
U19B
NJM4580M
R227
1M
C193
22P
R219
1K1
VR42B
B50K
R148
1K3
MID
R210
910R
C162
12n(M)
R211
910R
C153
33n(M) C154
33n(M)
C178
12n(M)
C170
18n(M)
C126
47u/25V
80HZ
2.5K
R121
10K
R122
10K
R234
47K
R247
22K 5
67
U20B
NJM4580M
VR47B
W50K
C128
47u/25V R263
3K9
R282
36K
C194
22P
C129
47u/25V
LEVEL
R124
10K
R123
10K
3c
5e
1a
4d
2b
X16
JY-6351G-02-250
T
R
S
RN
TN
LINE IN7/8
3c
5e
1a
4d
2b
X17
JY-6351G-02-250
T
R
S
RN
TN
LEFT(MONO)
RIGHT
3
21
U18A
NJM4580M
R118
10K
C68
22P
C122
47u/25V
R116
10K
C229
22P
R112
10K
C279
100P
R113
10K
C277
100P
5
67
U18B
NJM4580M
R119
10K
C69
22P
C123
47u/25V
R117
10K
C230
22P
R114
10K
C280
100P
R115
10K
C278
100P
R194
20K
R195
20K
84
U15C
NJM4580M
84
U18C
NJM4580M
84
U14C
NJM4580M
84
U19C
NJM4580M
84
U16C
NJM4580M
C217
100n
C215
100n
C218
100n
C216
100n
+VCC
-VCC
C219
100n
C220
100n
84
U17C
NJM4580M
U13~ U20=
84
U20C
NJM4580M
5
CN5E
5PIN 5
CN6E
5PIN
4
CN5D
5PIN 4
CN6D
5PIN
3
CN5C
5PIN 3
CN6C
5PIN
2
CN5B
5PIN 2
CN6B
5PIN
1
CN5A
5PIN 1
CN6A
5PIN
J5
POST
(PRE)
J6
POST
(PRE)
TP5
TP6
TP7
TP8
TP31
TP32
TP33
TP34
R88
4R7
R89
4R7
C14
1n
C13
1n
C56
1000u/10V
R401
4R7
VR33
O10K
R26
1K50
R382
2K49 3
21
U14A
NJM4580M
R95
5K11
C65
22P
C109
47u/25V
R190
20K
C18
330P
C46
10n
R396
470R
R381
2K49
C41
47u/63V
C42
47u/63V
R10
6K81
R9
6K81
PH PWR
TR23
HR
TR24
A1316
R27
1K50
-VCC
+VCC
R384
2K49
R383
2K49
C47
10n
R397
470R
TR33
HR
TR34
A1316
-VCC
+VCC
L5
0R0
3
21
U13A
NJM4580M
5
67
U13B
NJM4580M
C315
22P
C316
22P
R415
5K11
R414
5K11
R387
2K49
-VCC
R386
2K49
TR39
HR
+VCC
R385
2K49
D8
BAS316
+VCC
R44
20K
-VCC
R425
10K0
R426
10K0
R416
5K11
C317
22P
84
U13C
NJM4580M

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Date: Drawn By: Sheet
RevisionModel No:
19-Sep-2003 KEVIN LIN.
STEREO AUX & SENDS & MAIN OUT & 2TK & CTRL R & PHONES
43of
ALTO S-8 VER020724 A2
3c
5e
1a
4d
2b
X18
JY-6351G-02-250
STEREO AUX
LEFT 1
C265
100P
3c
5e
1a
4d
2b
X19
JY-6351G-02-250
RIGHT 1
C241
47u/25V R77
10K
R241
22K
C266
100P
C239
47u/25V R78
10K
R240
22K
VR48B
W50K
VR48A
W50K
3
21
U21A
NJM4580M
5
67
U21B
NJM4580M
84
U23C
NJM4580M
R318
56K
C223
22P
C243
47u/25V
R302
5K1
R320
56K
C269
22P
C245
47u/25V
R304
5K1
5
67
U25B
NJM4580M
3
21
U25A
NJM4580M
84
U26C
NJM4580M
R300
5K1
C259
22P
LEFT-BUS
RIGHT-BUS
C260
22P
R306
5K1
R305
5K1
84
U22C
NJM4580M
84
U21C
NJM4580M
R301
5K1
C234
47u/25V
C233
47u/25V
5
67
U26B
NJM4580M
3
21
U26A
NJM4580M
84
U27C
NJM4580M
R277
36K
C264
22P
R338
3K6
C235
47u/25V
VR51B
W50K
MAIN MIX
VR51A
W50K
R276
36K
C263
22P
R339
3K6
C236
47u/25V
C237
47u/25V
C238
47u/25V
R76
10K
R75
10K
R329
120R
3c
5e
1a
4d
2b
X24
JY-6351G-02-250
R327
120R
3c
5e
1a
4d
2b
X25
JY-6351G-02-250
R328
120R
R326
120R
MAIN OUT
(BALANCED)
LEFT
RIGHT
84
U24C
NJM4580M
C209
100n
C207
100n
C210
100n
C208
100n
+VCC
-VCC
C211
100n
C212
100n
R342
1K
R343
1K
L(WHITE)
R(RED)
C251
47u/25V
R188
20K 3
21
U23A
NJM4580M
R189
20K
C282
22P
C252
47u/25V
R85
10K
R309
5K1
C246
47u/25V
R186
20K 5
67
U23B
NJM4580M
R187
20K
C281
22P
C248
47u/25V
R81
10K
R308
5K1
TAPE IN
1
2
3
SW9A
PS-22E85L
LEFT-BUS
4
5
6
P
SW9B
PS-22E85L
RIGHT-BUS
2TK TO MIX
1
2
3
SW10A
PS-22E85L
R348
27K
2TK TO
3
21
U27A
NJM4580M
VR50B
W50K
C249
47u/25V R344
7K5
R278
36K
C225
22P
C250
47u/25V
R82
10K
3
21
U29A
BA15218N
5
67
U29B
BA15218N
3c
5e
1a
4d
2b
X29
JY-6351G-02-250
R337
120R
R333
120R
CTRL ROOM OUT
C262
22P
R83
10K
R332
120R
3c
5e
1a
4d
2b
X28
JY-6351G-02-250
R334
120R
PHONES
R331
120R
R330
120R
4
5
6
P
SW10B
PS-22E85L
R349
27K
5
67
U27B
NJM4580M
VR50A
W50K
C255
47u/25V R345
7K5 R279
36K
C226
22P
C256
47u/25V
R86
10K
3c
5e
1a
4d
2b
X30
JY-6351G-02-250
3
21
U28A
BA15218N
5
67
U28B
BA15218N
R336
120R
R335
120R
R84
10K
C261
22P
84
U28C
BA15218N
84
U29C
BA15218N
R347
47R
R346
47R
C253
47u/25V
C254
47u/25V
84
U25C
NJM4580M
AUX RETURN 1
L-METER
R-METER
R340
68K
R341
68K
1
2
3
SW8A
PS-22E85L
4
5
6P
SW8B
PS-22E85L
EFX TO AUX1
3c
5e
1a
4d
2b
X22
JY-6351G-02-250
AUX SEND1
R324
120R
R323
120R
R184
20K
C231
47u/25V
3
21
U24A
NJM4580M
R275
36K
C222
22P
AUX-1
3c
5e
1a
4d
2b
X23
JY-6351G-02-250
AUX SEND2
R322
120R
R325
120R
R185
20K
C232
47u/25V
5
67
U24B
NJM4580M
R274
36K
C221
22P
AUX-2
ROOM
C271
100P
C272
100P
TAPE OUT
MAIN MIX
AUX-1
AUX-1
T
R
S
RN
TN
T
R
S
RN
TN
LEFT-BUS
RIGHT-BUS
T
R
S
RN
TN
T
R
S
RN
TN
LEFT
RIGHT
R73
30K
R74
30K
CONTROL
PHONES/
CTRL ROOM
RETURN2
STEREO AUX
RETURN1
C267
100P
C242
47u/25V R79
10K
R242
22K
C268
100P
C240
47u/25V R80
10K
R243
22K
VR49B
W50K
VR49A
W50K
3
21
U22A
NJM4580M
5
67
U22B
NJM4580M
R319
56K
C224
22P
C244
47u/25V R303
20K
R321
56K
C270
22P
C247
47u/25V R307
20K
AUX RETURN 2
3c
5e
1a
4d
2b
X20
JY-6351G-02-250
3c
5e
1a
4d
2b
X21
JY-6351G-02-250
RIGHT 2
LEFT 2
U21~ U27=
5
67
U31B
NJM4580M
R37
100K R68
51K
R69
100R
C22
22P
3
21
U31A
NJM4580M
C43
47u/25V
C45
47u/25V
2
1
3
X26
JY-5030-030G
2
1
3
X27
JY-5030-030G
1 4
2 5
3 6
X31
SCP6873NS3232
R39
10K R70
100R
R72
51K
R38
10K
5
67
U32B
NJM4580M
R376
100K R92
51K
R377
100R
C24
22P
3
21
U32A
NJM4580M
C285
47u/25V
C286
47u/25V
R375
10K R378
100R
R41
51K
R93
10K
84
U31C
NJM4580M
84
U32C
NJM4580M
MAIN OUT
LEFT
RIGHT
LEFT
RIGHT
1
CN7A
2
CN7B
3
CN7C
4
CN7D
11
CN7K
5
CN7E
6
CN7F
8
CN7H
7
CN7G
9
CN7I
10
CN7J
10
CN9J
11
CN9K
7
CN9G
8
CN9H
5
CN9E
4
CN9D
6
CN9F
12
CN9L
9
CN9I
1
CN9A
2
CN9B
3
CN9C
6CN8F
5
CN8E
1
CN8A
2
CN8B
3
CN8C
4
CN8D
11
CN8K
9
CN8I
10
CN8J
7
CN8G
8
CN8H
4
CN10D
5
CN10E
6
CN10F
10
CN10J
11
CN10K
12
CN10L
7
CN10G
8
CN10H
9
CN10I
1
CN10A
3
CN10C
2
CN10B
11
CN6K
12
CN6L
11
CN5K
12
CN5L
10
CN5J
9
CN5I
10 CN6J
9CN6I
7
CN5G
6
CN5F
7CN6G
6CN6F
1
2
3
4
5
6
CN0
2.5-6P
PGND
+VCC
-VCC
PH PWR
8
CN5H
8CN6H +VCC-VCCPH PWR
CN5-6 :GND
CN5-7 :+VCC
CN5-8 :-VCC
CN5-9 :PHPWR
CN5-10 :GND
CN5-11 :PHONE R
CN5-12 :PHONE L
+VCC
-VCC
PH PWR
C305
100n
C306
100n
C307
100n
C308
100n
C309
100n
C310
100n
C311
100n
C312
100n
C313
100n
C314
100n
12
CN7L 12 CN8L
MOUT-L
MOUT-R
LEFT-BUS
RIGHT-BUS
AUX-1
AUX-2
(MONO / MASTER)
TP9
TP10
TP11
TP12
TP13
TP14
TP15
TP16
TP17
TP18
TP19
TP20
TP21
TP22
TP35
TP36
TP25
TP24
TP23
TP26

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Size
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Date: Drawn By: Sheet
RevisionModel No:
19-Sep-2003 KEVIN LIN.
DISPLAY STAGE
44of
ALTO S-8 VER020724
A2
8 914
U35C
LM339
1
6 7
U35B
LM339
1
6 7
U38B
LM339
8 914
U38C
LM339
8 914
U36C
LM339
1
6 7
U36B
LM339
1
6 7
U39B
LM339
8 914
U39C
LM339
LD10
GR LD11 GR LD12 GR LD13 GR LD14 GR LD15 GR LD16 GR LD17 GR
R350
120R
R355
120R R356 470R R359 330R R357 470R R360 330R R358 470R R361 510R R362 620R
+VCC
R354
56R
-VCC
PGND
10 11 13
U35D
LM339
5
42
U35A
LM339
5
42
U38A
LM339
10 11 13
U38D
LM339
10 11 13
U36D
LM339
5
42
U36A
LM339
5
42
U39A
LM339
10 11 13
U39D
LM339
LD22
GR LD23 GR LD24 GR LD25 GR LD26 GR LD27 GR LD28 GR LD29 GR
-VCC
LEFT METER
(-30) (-20) (-10) (-7) (-4) (-2) (0) (+2)
3
21
U30A
NJM4580M
R367
100K
R369
100K C283
47uF
PGND
10 11 13
U37D
LM339
5
42
U37A
LM339
5
42
U40A
LM339
10 11 13
U40D
LM339
LD30
GR LD31 GR LD32 YEL LD33 RED
8 914
U37C
LM339
1
6 7
U37B
LM339
1
6 7
U40B
LM339
8 914
U40C
LM339
LD18
GR LD19 GR LD20 YEL LD21 RED
R363
1K3 R364 2K R365 5K6 R366 22K
TR13
HR
+VCC
D1A
DA204K
D1B
DA204K
TR14
HR
R353
120R
R351
470R
R352
470R
R87
10K
PGND
5
67
U30B
NJM4580M
R368
100K
R370
100K C284
47uF
PGND
L-METER
R-METER
312
U36E
LM339
312
U37E
LM339
312
U35E
LM339
312
U38E
LM339
312
U39E
LM339
84
U30C
NJM4580M
C213
100n
C214
100n
R373
47R
R374
47R
C257
47u/25V
C258
47u/25V
+VCC
-VCC
PGND
LD8
RED
LD7
GR
R253
4K7
R252
2K
PGND
PGND
PH PWR
(+4) (+7) (+10) (+18)
PWR ON
PHANTOM
+VCC
312
U40E
LM339
R428
10K
R427
10K
PGNDPGND
2003/5/15 change D2,D3 from DA204K to 1N4148
D2
RLS4148
D3
RLS4148
D9
RLS4148 D10 RLS4148
R371,R372 0ohms刪除

1 2 34
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TP1
18VAC
TP2
18VAC
D1
1N4002
D2
1N4002
D7
1N4002
D6
1N4002
ZD1 1N5261
C6
100uF/100V
D12
1N4002
D13
1N4002
D11
1N4002
D14
1N4002
C5
100uF/100V
TR1
7815A
C1
2200uF/25V
PGND
D3
1N4002
C3
47uF/25V
PGND
D5
1N4002
D4
1N4002
TP3
+17V
C2
2200uF/25V
D9
1N4002
C4
47uF/25V
D10
1N4002
D8 1N4002
PGND
TP4
-17V
C7
220uF/100V
PGND
R1
390K
C8
47uF/100V
R2 10K
R3
10R
R4
20K
C9
47uF/100V
TP5 +48V
1 2 3 4 5 6
CN3
2.5-6P
PGND
TR3
TIP122
S8PWR.Sch
Titel Size File: Date: Drawn By:
Sheet
RevisionModel No:
8-Aug-2003
KEVIN LIN.
POWER SUPPLY BOARD
11of
ALTO S-8 VER020523
A4
+17V -17V
+48V
1 2 3
CN1 3P-3.9
TR2
7915A
1
2
CN2 2P-2.5 PHANTOM
(47V 0.5W)
+17V
-17V
+48V
PHANTOM
POWER
1 2 3
PT-S8
FUSE
SWITCH
AC INPUT