Alto S-8 Schematic
Service Manual
Model: S-8
8 Channel Mixing Console
www.altoproaudio.com
Version: 1.2
ISSUE:2003.9.21
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. 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
2.1
7654321
8
MONO INPUT CHANNE L S ( 1-4 )
PHANTOM
POWER
+48V
2
MIC IN
D
LINE IN
3
1
MIC GAIN:0~60dB
LINE IN T R IM:+15dB~-45dB
STEREO INPUT CHANNELS (5-8)
3c
R
4d
RN
2b
C
LEFT(MONO)
RIGHT
PHANTOM
POWER
+48V
MIC5 IN
TN
1a
T
5e
S
3c
R
4d
RN
2b
TN
1a
T
5e
S
2
3
1
INSERT
-
+
-
+
GAIN
+
-
GAIN
+
-
3c
4d
2b
1a
5e
R
RN
TN
T
S
LO MID HI
3-BAND EQ
+/-15db
HI PASS
SG/OL
LO MID HI
12K2.5K80
3-BAND EQ
+/-15db
12K2.5K80
EQ
75Hz
LEFT-BUS
RIGHT-BUS
AUX-1
AUX-2
LEVEL
12K2.5K80
3
1
LO CUT
2
POST
1 2
PRE
1 2
LEVEL
PAN
AUX1
AUX2
BALANCE
LEFT-BUS
RIGHT-BUS
AUX-1
AUX-2
LEFT-BUS
RIGHT-BUS
AUX2
AUX-2
AUX1
SG/OL
AUX-1
AUX-1
AUX-2
LEFT-BUS
RIGHT-BUS
LEFT-BUS
RIGHT-BUS
MAIN MIX
LEVEL
2TK TO MIX
1
3
1
3
2TK TO CTRL ROOM
2
2
2
1
3
TAPE IN
AUX SEND
R
T
S
AUX SEND1
R
T
S
AUX SEND2
MAIN OUT
R
T
S
2
3
1
MAIN MIX LEFT
R
T
S
2
3
1
MAIN MIX RIGHT
2-TRACK
TAPE OUT
D
C
LEFT
RIGHT
B
STEREO AUX RETURN 1
3c
R
4d
RN
2b
TN
1a
T
5e
S
LEFT(MONO)
RIGHT
3c
R
4d
RN
2b
TN
1a
T
5e
S
STEREO AUX RETURN 2
3c
R
4d
RN
2b
TN
1a
T
5e
A
LEFT
RIGHT
1 2 3 4 5 6 78
S
3c
R
4d
RN
2b
TN
1a
T
5e
S
CHANNEL 5, 6 O NLY
-
+
-
+
-
+
-
+
AUX RE TURN1
AUX RE TURN2
EFX TO AUX-1
2
2
1
3
1
3
LEFT-BUS
RIGHT-BUS
LEFT-BUS
AUX-1
RIGHT-BUS
AUX-1
2
CONTROL ROOM
& PHONES
1
3
LEFT METER
RIGHT METER
Titel
Size
Date:
File:
A3
ALTO MIXING CONSOLE
S-8 BLOCK DIAGRAM
8-Aug-2003
S8-MAP.Sch
PHONES OUTPUT
R
T
S
PHONES
CONTROL ROOM OUT P UT
R
T
S
R
T
S
Sheet
Drawn By:
RevisionModel No:
KEVIN LIN.
LEFT
RIGHT
VER020521
11of
B
A
D
C
B
A
MIC 1
LINE IN1
MIC GAIN=-10~-60dB
LINE IN GAIN=+10~-40dB
MIC 2
LINE IN2
MIC 3
LINE IN3
MIC 4
LINE IN4
R287
5K1
R286
5K1
AUX-POST
VR6
W50K
R291
5K1
R290
5K1
AUX-POST
VR14
W50K
R295
5K1
R294
5K1
AUX-POST
VR22
W50K
R296
5K1
R299
5K1
AUX-POST
VR30
W50K
Sheet
Drawn By:
8
AUX-PRE
VR5
W50K
AUX-PRE
VR13
W50K
AUX-PRE
VR21
W50K
AUX-PRE
VR29
W50K
LEFT-BUS
RIGHT-BUS
LEFT-BUS
RIGHT-BUS
LEFT-BUS
RIGHT-BUS
LEFT-BUS
RIGHT-BUS
RevisionModel No:
KEVIN LIN.
AUX-2
AUX-1
AUX-2
AUX-1
AUX-2
AUX-1
AUX-2
AUX-1
VER020815
41of
D
C
B
A
7654321
PH PWR
R1
6K81
R13
1
3
2
4
X5
JY-5042-030G
3c
4d
2b
1a
5e
X6
JY-6351G-02-250
1
3
2
4
X7
JY-5042-030G
3c
4d
2b
1a
5e
X8
JY-6351G-02-250
1
3
2
4
X9
JY-5042-030G
3c
4d
2b
1a
5e
X10
JY-6351G-02-250
4R7
R14
4R7
R
RN
TN
T
S
R
RN
TN
T
S
R
RN
TN
T
S
22u/35V
C20
22u/35V
R3
6K81
R48
4R7
R49
4R7
22u/35V
C23
22u/35V
R5
6K81
R19
4R7
R20
4R7
22u/35V
C26
22u/35V
6K81
R24
1
3
2
4
X11
JY-5042-030G
3c
4d
2b
1a
5e
X12
JY-6351G-02-250
1 2 3 4 5 6 78
4R7
R25
4R7
R
RN
TN
T
S
22u/35V
C28
22u/35V
330P
330P
330P
R7
330P
C1
C19
C2
C21
C3
C25
C4
C27
PH PWR
PH PWR
PH PWR
R2
6K81
C30
47u/63V
6K34
R30
6K34
R4
6K81
C33
47u/63V
6K34
R32
6K34
R6
6K81
C36
47u/63V
6K34
R34
6K34
R8
6K81
C39
47u/63V
6K34
R36
6K34
R29
1K50
R31
1K50
R33
1K50
R35
1K50
R12
R16
R18
R22
C29
47u/63V
C32
47u/63V
C34
47u/63V
C37
47u/63V
C15
10n
R28
20K
-VCC
C5
1n
R45
2K49
C17
10n
R40
20K
-VCC
C7
1n
R59
2K49
C31
10n
R42
20K
-VCC
C9
1n
R127
2K49
C40
10n
R43
20K
-VCC
C11
1n
R191
2K49
S8-IN2
S8-IN2.SCH
+VCC
-VCC
+VCC
-VCC
+VCC
-VCC
+VCC
-VCC
R50
2K49
TR15
HR
R388
470R
TR16
A1316
R15
1K50
R60
2K49
TR17
HR
R390
470R
TR18
A1316
R17
1K50
R61
2K49
TR19
HR
R392
470R
TR20
A1316
R21
1K50
R128
2K49
TR21
HR
R394
470R
TR22
A1316
R23
1K50
C16
10n
R389
470R
TR26
A1316
C35
10n
R391
470R
TR28
A1316
C38
10n
R393
470R
TR30
A1316
C44
10n
R395
470R
TR32
A1316
+VCC
C6
1n
-VCC
+VCC
C8
1n
-VCC
+VCC
C10
1n
-VCC
+VCC
C12
1n
-VCC
S8-DSP
S8-DSP.SCH
R52
2K49
TR25
HR
R51
2K49
R65
2K49
TR27
HR
R64
2K49
R66
2K49
TR29
HR
R129
2K49
R130
2K49
TR31
HR
R379
2K49
+VCC
C51
1000u/10V
VR1
O10K
R11
4R7
+VCC
C52
1000u/10V
VR9
O10K
R398
4R7
+VCC
C53
1000u/10V
VR17
O10K
R399
4R7
+VCC
C55
1000u/10V
VR25
010K
R400
4R7
BAS316
L1
0R0
BAS316
L2
0R0
BAS316
L3
0R0
BAS316
L4
0R0
R53
2K49
D4
R56
2K49
D5
R90
2K49
D6
R135
2K49
D7
S8-PU1
S8-PU1.SCH
+VCC
-VCC
+VCC
-VCC
+VCC
-VCC
+VCC
-VCC
R57
2K49
TR35
HR
R58
2K49
R91
2K49
TR36
HR
R94
2K49
R126
2K49
TR37
HR
R144
2K49
R165
2K49
TR38
HR
R380
2K49
U1A
NJM4580M
3
2
C48
22P
5
6
C50
22P
R402
5K11
U4A
NJM4580M
3
2
C60
22P
5
6
C61
22P
R405
5K11
U7A
NJM4580M
3
2
C64
22P
5
6
C82
22P
R408
5K11
U10A
NJM4580M
3
2
C84
22P
5
6
C110
22P
R412
5K11
R403
5K11
U1B
NJM4580M
R406
5K11
U4B
NJM4580M
R409
5K11
U7B
NJM4580M
R413
5K11
U10B
NJM4580M
+VCC
C201
100n
C202
100n
-VCC
1
7
1
7
1
7
1
7
C203
100n
C57
22P
R404
5K11
R417
10K0
R418
10K0
C62
22P
R407
5K11
R419
10K0
R420
10K0
C73
0.22u/50V
C63
22P
R410
5K11
R421
10K0
R422
10K0
C76
0.22u/50V
C83
22P
R411
5K11
R423
10K0
R424
10K0
C79
0.22u/50V
C205
100n
C204
C206
100n
100n
R136
1K3
C70
0.22u/50V
R131
62K
R138
1K3
R132
62K
R140
1K3
R133
62K
R142
1K3
R134
62K
C287
100n
C288
100n
NJM4580M
3
2
0.22u/50V
NJM4580M
3
2
0.22u/50V
NJM4580M
3
2
NJM4580M
3
2
0.22u/50V
C289
100n
C290
100n
U2A
C49
22P
R46
5K11
C71
6
5
NJM4580M
U5A
C54
22P
R54
5K11
C74
6
5
NJM4580M
U8A
C58
22P
R62
5K11
C77
0.22u/50V
6
5
NJM4580M
U11A
C59
22P
R67
5K11
C80
6
5
NJM4580M
C291
100n
C292
100n
1
U2B
1
U5B
1
U8B
1
U11B
C293
100n
C294
100n
C85
47u/25V
C72
0.22u/50V
R149
6K8
7
C91
47u/25V
R178
C75
0.22u/50V
R153
6K8
7
C92
47u/25V
C78
0.22u/50V
R157
6K8
7
C99
47u/25V
C81
0.22u/50V
R161
6K8
7
C295
100n
C296
100n
R176
20K
47u/25V
20K
47u/25V
R180
20K
47u/25V
R181
20K
47u/25V
C86
C93
C100
C108
C297
100n
C298
100n
PS-22E85L
R177
20K
PS-22E85L
R179
20K
PS-22E85L
R182
20K
PS-22E85L
R183
20K
C299
100n
C300
100n
LO CUT
SW1A
P
SW1B
PS-22E85L
LO CUT
SW2A
P
SW2B
PS-22E85L
LO CUT
SW3A
P
SW3B
PS-22E85L
LO CUT
SW4A
P
SW4B
PS-22E85L
C301
100n
C302
100n
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
C303
100n
C304
100n
CN1A
CN1B
5PIN
CN1C
5PIN
CN1D
5PIN
5PIN
CN1E
5PIN
1
TP27
2
TP28
3
TP29
4
TP30
5
CN2A
5PIN
CN2B
5PIN
CN2C
5PIN
CN2D
5PIN
CN2E
1
2
3
4
5PIN
5
GND-INS
3c
R
4d
RN
2b
TN
1a
T
5e
S
GND-INS
C318
47u/25V
3c
R
4d
RN
2b
TN
1a
T
5e
S
GND-INS
C319
47u/25V
3c
R
4d
RN
2b
TN
1a
T
5e
S
GND-INS
C320
47u/25V
3c
R
4d
RN
2b
TN
1a
T
5e
S
GND-INS
C321
47u/25V
CN3E
5PIN
5
GND-INS
U1~ U12=
84
U1C
INSERT1
X1
JY-6351G-02-250
CN3A
5PIN
1
1
CN4A
5PIN
INSERT2
X2
JY-6351G-02-250
2
2
CN4B
CN3B
5PIN
5PIN
INSERT3
X3
JY-6351G-02-250
CN3C
5PIN
3
3
CN4C
5PIN
INSERT4
X4
JY-6351G-02-250
CN3D
5PIN
4
4
CN4D
5PIN
CN4E
5PIN
5
NJM4580M
NJM4580M
NJM4580M
NJM4580M
NJM4580M
NJM4580M
NJM4580M
NJM4580M
NJM4580M
NJM4580M
NJM4580M
NJM4580M
84
84
U2C
U3C
EQ HI
12KHZ
MID
2.5K
LO
80HZ
EQ HI
12KHZ
MID
2.5K
LO
80HZ
EQ HI
12KHZ
MID
2.5K
LO
80HZ
EQ HI
12KHZ
MID
2.5K
LO
80HZ
TP1
TP2
TP3
TP4
C131
18n(M)
R196
910R
R150
6K8
C139
33n(M)
C132
18n(M)
(SOLTON 1K2)用
R198
910R
R154
6K8
C141
33n(M)
C133
18n(M)
R200
910R
R158
6K8
C143
33n(M)
C134
18n(M)
R202
910R
R162
6K8
C145
33n(M)
84
U4C
R212
1K1
R137
1K3
R213
1K1
R139
1K3
R214
1K1
R141
1K3
R215
1K1
R143
1K3
U5C
VR2
C163
B50K
18n(M)
C87
C171
R197
910R
R151
6K8
C140
33n(M)
R47
10K
C164
C172
R199
910R
R155
6K8
C142
33n(M)
R55
10K
C165
C173
R201
910R
R159
6K8
C144
33n(M)
R63
10K
C166
C174
R203
910R
R163
6K8
C146
33n(M)
R71
10K
U7C
47u/25V
C94
47u/25V
C101
47u/25V
C102
47u/25V
84
U8C
12n(M)
VR3
B50K
C155
12n(M)
VR4
B50K
VR10
B50K
18n(M)
12n(M)
VR11
B50K
C156
12n(M)
VR12
B50K
VR18
B50K
18n(M)
12n(M)
VR19
B50K
C157
12n(M)
VR20
B50K
VR26
B50K
18n(M)
12n(M)
VR27
B50K
C158
12n(M)
VR28
B50K
84
84
U6C
84
R228
47K
R229
47K
R230
47K
R231
47K
6
5
NJM4580M
6
5
NJM4580M
6
5
NJM4580M
6
5
NJM4580M
C179
22P
R220
1M
U3B
C195
2.2u/50V
R248
4K7
C181
22P
R221
1M
U6B
C196
2.2u/50V
R249
4K7
C182
22P
R222
1M
U9B
C197
2.2u/50V
R250
4K7
C185
22P
U12B
C198
2.2u/50V
R251
4K7
84
U9C
C88
47u/25V
7
R152
6K8
TR1
BR
C95
47u/25V
7
R156
6K8
TR3
BR
C103
47u/25V
7
R160
6K8
TR5
BR
R223
1M
7
C104
47u/25V
R164
6K8
TR7
BR
84
U10C
LEVEL
LEVEL
LEVEL
LEVEL
TR2
BR
TR4
BR
TR6
BR
TR8
BR
84
U11C
C89
47u/25V
VR8
W50K
R236
22K
PGND
C96
47u/25V
VR16
W50K
R237
22K
PGND
C97
47u/25V
VR24
W50K
R238
22K
PGND
C105
47u/25V
VR32
W50K
R239
22K
R264
1K5
LD1
RED
R265
1K5
LD2
RED
R266
1K5
LD3
RED
R267
1K5
LD4
RED
U12C
PEAK
PEAK
PEAK
PEAK
PGND
84
R256
3K9
+VCC
R257
3K9
+VCC
R258
3K9
+VCC
R259
3K9
+VCC
C90
VR7A
PAN
JQ10K
VR7B
JQ10K
J1
C180
22P
R270
2
3
36K
1
U3A
NJM4580M
47u/25V
POST
(PRE)
R284
5K1
R285
5K1
C98
47u/25V
J2
VR15A
JQ10K
VR15B
JQ10K
PAN
C183
22P
R271
2
3
36K
1
U6A
NJM4580M
POST
(PRE)
R288
5K1
R289
5K1
C106
47u/25V
J3
VR23A
JQ10K
VR23B
JQ10K
PAN
C184
22P
R272
2
3
36K
1
U9A
NJM4580M
POST
(PRE)
R292
5K1
R293
5K1
C107
47u/25V
J4
VR31A
JQ10K
VR31B
JQ10K
PAN
C186
22P
R273
2
3
36K
1
U12A
NJM4580M
POST
(PRE)
R297
5K1
R298
5K1
Titel
Size
Date:
File:
A2
INPUT STAGE ( CH1-CH4 )
ALTO S-8
19-Sep-2003
S8-IN1-2.Sch
7654321
8
PH PWR
R9
1
3
2
4
JY-6351G-02-250
X14
R88
4R7
R89
4R7
6K81
MIC 5
D
C
X13
JY-5042-030G
LINE IN 5/6
LEFT(MONO)
RIGHT
X15
JY-6351G-02-250
LINE IN 7/8
LEFT(MONO)
X16
JY-6351G-02-250
B
RIGHT
X17
JY-6351G-02-250
+VCC
C215
A
100n
C216
100n
-VCC
C18
330P
3c
4d
2b
1a
5e
3c
4d
2b
1a
5e
C217
100n
C218
100n
47u/63V
R
RN
TN
T
S
R
RN
TN
T
S
3c
4d
2b
1a
5e
3c
4d
2b
1a
5e
R
RN
TN
R
RN
TN
C42
T
S
T
S
R10
6K81
47u/63V
R26
1K50
C219
100n
C220
100n
C41
C46
10n
R44
20K
-VCC
C13
1n
R381
2K49
C275
100P
C273
100P
C276
100P
C274
100P
U13~ U20=
84
U13C
+VCC
-VCC
C279
100P
C277
100P
C280
100P
C278
100P
84
U14C
A1316
R382
2K49
TR23
HR
R396
470R
TR24
R27
1K50
R101
18K
C227
R103
18K
C228
NJM4580M
NJM4580M
NJM4580M
NJM4580M
NJM4580M
NJM4580M
NJM4580M
NJM4580M
U15C
R102
18K
22P
R104
18K
22P
R112
10K
C229
C230
C47
10n
R397
470R
TR34
A1316
R113
10K
22P
R114
10K
R115
10K
22P
84
C14
1n
+VCC
-VCC
TR33
HR
R383
2K49
84
U16C
R384
2K49
2
3
R105
10K
6
5
R106
10K
2
3
6
5
C56
1000u/10V
C66
22P
C67
22P
C68
22P
R116
10K
C69
22P
R117
10K
U17C
+VCC
2K49
BAS316
VR33
O10K
R401
4R7
L5
0R0
R107
10K
R108
10K
1
U15A
NJM4580M
R110
10K
R109
10K
7
U15B
NJM4580M
R118
10K
U18A
NJM4580M
R119
10K
U18B
NJM4580M
84
R385
D8
47u/25V
1
7
U18C
C117
C118
47u/25V
47u/25V
47u/25V
84
C122
C123
+VCC
-VCC
84
U19C
R386
2K49
TR39
HR
R387
2K49
TP31
TP32
R192
20K
R193
20K
TP33
TP34
3
2
C315
5
6
R194
20K
R195
U13A
NJM4580M
22P
C316
22P
R414
5K11
20K
84
U20C
1
R415
5K11
U13B
NJM4580M
7
R416
5K11
R425
10K0
R426
10K0
C317
22P
CN5A
5PIN
CN5B
5PIN
CN5C
5PIN
CN5D
5PIN
CN5E
5PIN
1
2
3
4
5
NJM4580M
3
2
CN6A
5PIN
CN6B
5PIN
CN6C
5PIN
CN6D
5PIN
CN6E
5PIN
U14A
1
2
3
4
5
C65
22P
R95
5K11
47u/25V
1
R190
20K
C109
TP6
TP7
TP8
EQ HI
12KHZ
TP5
EQ HI
12KHZ
EQ HI
12KHZ
EQ HI
12KHZ
MID
2.5K
LO
80HZ
MID
2.5K
LO
80HZ
MID
2.5K
LO
80HZ
MID
2.5K
LO
80HZ
C135
18n(M)
R204
910R
R166
6K8
C147
33n(M)
C136
18n(M)
R206
910R
R168
6K8
C149
33n(M)
C137
18n(M)
R208
910R
R171
6K8
C151
33n(M)
C138
18n(M)
R210
910R
R174
6K8
C153
33n(M)
R216
1K1
R145
1K3
R217
1K1
R146
1K3
R218
1K1
R147
1K3
R219
1K1
R148
1K3
VR34A
B50K
VR36A
B50K
VR34B
B50K
VR36B
B50K
VR41A
B50K
VR43A
B50K
VR41B
B50K
VR43B
B50K
VR35A
B50K
C159
12n(M)
VR35B
B50K
C160
12n(M)
VR42A
B50K
C161
12n(M)
VR42B
B50K
C162
12n(M)
C167
18n(M)
C175
12n(M)
R205
910R
R167
6K8
C148
33n(M)
R96
10K
C176
12n(M)
R207
910R
R169
6K8
C150
33n(M)
R111
10K
C169
18n(M)
C177
12n(M)
R209
910R
R172
6K8
C152
33n(M)
R120
10K
C170
18n(M)
C178
12n(M)
R211
910R
R175
6K8
C154
33n(M)
R125
10K
C168
18n(M)
C111
47u/25V
C119
47u/25V
C124
47u/25V
C125
47u/25V
2
3
NJM4580M
6
5
NJM4580M
2
3
NJM4580M
6
5
NJM4580M
U16A
U16B
U19A
R227
U19B
C187
22P
C190
22P
C191
22P
C193
22P
1M
R224
1M
1
C112
47u/25V
R97
10K
R98
10K
R225
1M
7
C120
47u/25V
R226
1M
1
C127
47u/25V
R121
10K
R122
10K
7
C126
47u/25V
R244
22K
R245
22K
R233
47K
R246
22K
R247
22K
R232
47K
R234
47K
R235
47K
LEVEL
LEVEL
LEVEL
LEVEL
R254
4K7
R255
4K7
C113
47u/25V
VR40A
W50K
C114
47u/25V
VR40B
W50K
C199
2.2u/50V
C121
47u/25V
VR47A
W50K
C128
47u/25V
VR47B
W50K
C200
2.2u/50V
R260
3K9
R261
3K9
R262
3K9
R263
3K9
2
3
6
5
R170
6K8
TR9
BR
2
3
6
5
R173
6K8
TR11
BR
C188
22P
U17A
NJM4580M
C189
22P
U17B
NJM4580M
TR10
BR
PGND
C192
22P
U20A
NJM4580M
C194
22P
U20B
NJM4580M
TR12
BR
PGND
R281
36K
1
R280
36K
7
47u/25V
R268
1K5
LD5
RED
R283
36K
1
R282
36K
7
R269
1K5
LD6
RED
47u/25V
R99
10K
C115
+VCC
PEAK
C130
47u/25V
R123
10K
C129
47u/25V
+VCC
PEAK
C116
R100
10K
R124
10K
J5
J6
BAL
VR39A
JQ10K
VR39B
JQ10K
POST
(PRE)
BAL
VR46A
JQ10K
VR46B
JQ10K
POST
(PRE)
R312
5K1
R317
5K1
R313
5K1
R314
5K1
R311
5K1
R310
5K1
AUX-POST
VR38
W50K
AUX-PRE
R316
5K1
R315
5K1
AUX-POST
VR45
W50K
AUX-PRE
VR37
W50K
VR44
W50K
LEFT-BUS
D
RIGHT-BUS
AUX-2
AUX-1
C
LEFT-BUS
B
RIGHT-BUS
AUX-2
AUX-1
A
Titel
Size
A2
Date:
1 2 3 4 5 6 78
File:
INPUT STAGE ( CH5-CH8)
ALTO S-8
19-Sep-2003
S8-IN2.Sch
Sheet
Drawn By:
RevisionModel No:
KEVIN LIN.
VER020815
42of
D
C
B
A
AUX-1
AUX-2
STEREO AUX
RETURN1
LEFT 1
(MONO / MASTER)
JY-6351G-02-250
RIGHT 1
JY-6351G-02-250
STEREO AUX
RETURN2
LEFT 2
JY-6351G-02-250
RIGHT 2
JY-6351G-02-250
TAPE IN
L(WHITE)
R(RED)
+VCC
C207
100n
C208
100n
-VCC
1 2 3 4 5 6 78
X18
X19
X20
X21
TAPE OUT
X31
SCP6873NS3232
1 4
2 5
3
C209
C211
100n
100n
C210
C212
100n
100n
TP9
TP10
3c
4d
2b
1a
5e
3c
4d
2b
1a
5e
3c
4d
2b
1a
5e
3c
4d
2b
1a
5e
6
AUX-1
AUX-2
C305
100n
C306
100n
CN7A
CN7B
CN7C
CN7D
CN7K
11
CN7L12CN8L
12
R342
1K
R343
1K
C307
100n
C308
100n
CN8F
6
CN8E
5
1
2
3
4
CN7J
C309
100n
C310
100n
CN8A
CN8B
CN8C
CN8D
CN8K
CN7I
10
CN7G
CN7H
CN7E
9
7
8
CN7F
6
5
1
2
3
4
11
CN8I
CN8J
CN8H
C311
100n
C312
100n
TP23
TP24
TP25
TP26
CN8G
7654321
C222
22P
R275
TP35
36K
2
3
C221
22P
R274
36K
TP36
47u/25V
47u/25V
47u/25V
47u/25V
9
10
AUX RETURN 1
C241
R77
10K
C265
100P
C239
R78
10K
C266
100P
AUX RETURN 2
C242
R79
10K
C267
100P
C240
R80
10K
C268
100P
47u/25V
6
5
R241
22K
R240
R242
22K
R243
22K
C246
C271
100P
22K
TP21
7
TP22
8
C251
47u/25V
C272
100P
U21~ U27=
84
84
U22C
U21C
U24A
NJM4580M
U24B
NJM4580M
VR48A
W50K
VR48B
W50K
VR49A
W50K
VR49B
W50K
R187
20K
R186
20K
R189
20K
R188
20K
NJM4580M
NJM4580M
NJM4580M
NJM4580M
NJM4580M
NJM4580M
NJM4580M
U23C
47u/25V
1
47u/25V
7
C281
6
5
2
3
84
C231
R184
20K
C232
R185
20K
22P
C282
22P
NJM4580M
2
3
6
5
2
3
6
5
U23B
NJM4580M
U23A
NJM4580M
NJM4580M
84
U24C
C223
22P
U21A
NJM4580M
C269
22P
U21B
NJM4580M
C224
22P
U22A
NJM4580M
C270
22P
U22B
NJM4580M
C248
47u/25V
7
R81
10K
C252
47u/25V
1
R85
10K
84
U25C
1
7
1
7
R322
120R
R324
120R
R323
120R
R325
120R
R318
56K
47u/25V
R320
56K
47u/25V
R319
56K
C244
47u/25V
R321
56K
47u/25V
R308
5K1
R309
U26C
C243
C245
C247
5K1
84
3c
R
4d
RN
2b
TN
1a
T
5e
S
X22
JY-6351G-02-250
3c
R
4d
RN
2b
TN
1a
T
5e
S
X23
JY-6351G-02-250
R302
5K1
R304
5K1
R305
5K1
R303
20K
R307
20K
2TK TO MIX
3
2
1
SW9A
PS-22E85L
RIGHT-BUS
P
6
5
4
SW9B
PS-22E85L
84
U27C
R306
LEFT-BUS
84
U31C
AUX SEND1
AUX SEND2
LEFT-BUS
RIGHT-BUS
5K1
EFX TO AU X1
1
2
3
SW8A
PS-22E85L
R340
68K
4
5
6
SW8B
PS-22E85L
R341
68K
U32C
P
84
LEFT-BUS
RIGHT-BUS
AUX-1
AUX-1
CTRL ROOM
R347
47R
R346
47R
2TK TO
SW10A
PS-22E85L
P
SW10B
PS-22E85L
84
U28C
BA15218N
LEFT-BUS
RIGHT-BUS
1
2
3
4
5
6
84
U29C
BA15218N
PHONES/
C253
47u/25V
C254
47u/25V
R348
27K
47u/25V
R349
27K
C313
100n
C314
100n
6
5
2
3
L-METER
C255
R-METER
C259
22P
U25B
NJM4580M
C260
22P
U25A
NJM4580M
R37
100K
R376
100K
CONTROL
ROOM
C249
47u/25V
VR50B
W50K
VR50A
W50K
R300
5K1
7
R301
5K1
1
C233
47u/25V
2
3
NJM4580M
2
3
NJM4580M
R344
7K5
R345
7K5
C234
47u/25V
U31A
U32A
2
3
C226
6
5
NJM4580M
TP11
TP12
NJM4580M
22P
U27B
PH PWR
MAIN MIX
R73
30K
MAIN MIX
R74
30K
R38
10K
1
R93
10K
1
C225
22P
1
U27A
7
47u/25V
+VCC
-VCC
LEFT
RIGHT
R278
36K
C250
47u/25V
R82
10K
R279
36K
C256
R86
10K
C235
47u/25V
C236
47u/25V
C22
22P
6
5
C24
22P
6
5
6
7
8
9
10
VR51B
W50K
VR51A
W50K
CN6F
CN6G
CN6H
CN6I
CN6J
R338
3K6
U26B
NJM4580M
R339
3K6
NJM4580M
U31B
NJM4580M
U32B
NJM4580M
CN6K
11
CN6L
12
6
5
2
3
U26A
CN5K
CN5L
CN5F
CN5G
CN5H
CN5I
CN5J
C264
22P
R277
36K
7
C237
47u/25V
C263
22P
R276
36K
1
C238
47u/25V
C43
47u/25V
R39
10K
7
C45
47u/25V
C285
47u/25V
R375
10K
7
C286
47u/25V
C261
22P
R84
10K
2
3
11
C262
22P
R83
10K
2
3
12
6
7
+VCC
8
-VCC
9
PH PWR
10
R72
51K
R41
51K
U28A
BA15218N
U29A
BA15218N
R76
10K
R75
10K
1
1
TP13
R68
R92
6
5
6
5
51K
51K
TP14
R69
100R
R70
100R
R377
100R
R378
100R
BA15218N
BA15218N
TP19
TP20
MOUT-L
MOUT-R
U28B
U29B
TP15
TP16
TP17
TP18
7
7
R330
120R
R331
120R
R332
120R
R334
120R
CN9D
4
CN9E
5
CN9F
6
CN9J
10
CN9K
11
CN9L
12
CN9G
7
CN9H
8
CN9I
9
CN9A
1
CN9B
2
CN9C
3
CN10D
CN10E
CN10F
CN10J
CN10K
CN10L
CN10G
CN10H
CN10I
CN10A
CN10B
CN10C
+VCC-VCCPH PWR
4
5
6
10
11
12
7
8
9
1
2
3
PGND
CN0
2.5-6P
1
2
3
4
5
6
R327
120R
R329
120R
R326
120R
R328
120R
R333
120R
R337
120R
R335
120R
R336
120R
3c
R
4d
RN
2b
TN
1a
T
5e
S
X24
JY-6351G-02-250
3c
R
4d
RN
2b
TN
1a
T
5e
S
X25
JY-6351G-02-250
2
3
1
JY-5030-030G
2
3
1
JY-5030-030G
3c
4d
2b
1a
5e
X28
JY-6351G-02-250
3c
4d
2b
1a
5e
JY-6351G-02-250
3c
4d
2b
1a
5e
X30
JY-6351G-02-250
Titel
STEREO AUX & SENDS & MAIN OUT & 2TK & CTRL R & PHONES
Size
A2
Date:
File:
X26
X27
X29
19-Sep-2003
S8-PU1.Sch
MAIN OUT
LEFT
RIGHT
MAIN OUT
(BALANCED)
LEFT
RIGHT
PHONES
LEFT
CTRL ROOM OUT
RIGHT
ALTO S-8
8
CN5-6 :GND
CN5-7 :+VCC
CN5-8 :-VCC
CN5-9 :PHPWR
CN5-10 :GND
CN5-11 :PHONE R
CN5-12 :PHONE L
RevisionModel No:
Sheet
Drawn By:
VER020724
43of
KEVIN LIN.
D
C
B
A
321
4
LEFT METER
(-30) (-20) (-10) (-7) (-4) (-2) (0) (+2)
+VCC
D
R350
120R
TR13
HR
LD10
GR
LD11
GR
LD12
GR
LD13
GR
LD14
GR
LD15
GR
LD16
GR
LD17
GR
(+4) (+7) (+10) (+18)
LD18
GR
LD19
GR
LD20
YEL
LD21
RED
-VCC
+VCC
D
1
U38B
LM339
14
U38C
LM339
1
LM339
U35B
14
U35C
LM339
1
LM339
U39B
14
U39C
LM339
1
LM339
U36B
14
LM339
U36C
1
LM339
U40B
14
U40C
LM339
1
LM339
U37B
14
U37C
LM339
R252
2K
LD7
R351
6
7
8
9
6
7
8
9
6
7
8
9
6
7
8
9
6
7
8
9
6
7
8
9
470R
D1A
C
DA204K
DA204K
D1B
R87
10K
R352
470R
PGND
R354
56R
+VCC
R355
120R
4
5
11
R356
470R
10
R359
330R
4
5
11
R357
470R
10
R360
330R
4
5
11
R358
470R
10
R361
510R
4
5
11
10
R362
620R
R363
1K3
4
5
11
10
R364
2K
R365
5K6
4
5
11
R366
22K
10
GR
PWR ON
R253
4K7
PGND
PH PWR
C
LD8
RED
U35A
LM339
2
LD24
GR
LM339
13
U35D
LD25
GR
U39A
LM339
2
LD26
GR
U39D
LM339
13
LD27
GR
U36A
LM339
2
LD28
GR
U36D
LM339
13
LD29
GR
LM339
2
U40A
LD30
GR
U40D
LM339
13
LD31
GR
U37A
LM339
2
LD32
YEL
13
U37D
LM339
LD33
RED
PHANTOM
PGND
-VCC
R353
120R
PGND
TR14
HR
U38A
LM339
2
LD22
GR
U38D
LM339
13
LD23
GR
B
R367
L-METER
100K
2
3
R368
D2
RLS4148
U30A
NJM4580M
R369
100K
1
D9
RLS4148
C283
47uF
6
5
R427
10K
PGND
100K
A
R-METER
2003/5/15 change D2,D3 from DA204K to 1N4148
R371,R372 0ohms刪除
1 2 34
D3
RLS4148
U30B
NJM4580M
R370
100K
7
D10
RLS4148
C284
47uF
U30C
NJM4580M
PGND
PGNDPGND
R428
10K
84
312
U35E
LM339
312
U36E
LM339
312
U37E
LM339
312
U38E
LM339
312
U39E
LM339
312
U40E
LM339
Titel
DISPLAY STAGE
Size
ALTO S-8
Date:
File:
A2
19-Sep-2003
S8-DSP.Sch
C213
100n
C214
100n
Sheet
Drawn By:
R373
47R
PGND
R374
47R
+VCC
-VCC
RevisionModel No:
KEVIN LIN.
B
C257
47u/25V
C258
47u/25V
A
VER020724
44of
A
11of
VER020523
KEVIN LIN.
RevisionModel No:
Drawn By:
Sheet
10R
+48V
B
R4
20K
C9
47uF/100V
ZD1
1N5261
PGND
(47V 0.5W)
D
12345
CN3
2.5-6P
4
+17V
+17V
-17V
6
+48V
PGND
C
TP5
+48V
PGND
POWER
PHANTOM
-17V
TR3
R3
TIP122
ALTO S- 8
C8
C3
D5
47uF/25V
1N4002
TP3
+17V
C4
47uF/25V
TP4
-17V
D10
1N4002
C7
220uF/100V
R2
10K
47uF/100V
POWER SUPPLY BOARD
8-Aug-2003
S8PWR.Sch
A4
Titel
Size
File:
Date:
D4
1N4002
D8
D3
1N4002
321
TR1
7815A
C1
2200uF/25V
D2
1N4002
D1
1N4002
TP1
18VAC
CN1
3P-3.9
1N4002
C2
PGND
2200uF/25V
D7
D6
TP2
18VAC
PGND
123
1N4002
1N4002
TR2
D9
1N4002
7915A
D12
D11
CN2
1N4002
1N4002
PT-S8
R1
PHANTOM
2
1
390K
2P-2.5
D14
1N4002
C6
100uF/100V
123
D13
1N4002
C5
100uF/100V
FUSE
SWITCH
1 2 34
AC INPUT
D
C
B
A
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