Service Manual
Model: AMX-100/ AMX-100FX
www.altoproaudio.com
Versi on: .2
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
9. TECHNICAL SPECIFICATION
Mono input channels
Microphone input
Frequency response
Distortion (THD & N)
Gain range 0dB to 44dB (MIC)
SNR (Signal to Noise Ratio)
Line input
Frequency response
Distortion (THD & N)
Sensitivity range
Stereo input channels
Line input
Frequency response
Distortion (THD & N)
Impedances
Microphone input
Channel Insert return
All other inputs
Tape out
All other output
Equalization
Hi shelving
Mid bell
Low shelving
Low Cut filter
DSP Section (For AMX-100FX Model)
A/D and D/A converters
DSP resolution
Type of effects
Mono & Stereo DELAY (max DELAY TIME 650ms)
Chorus, Flanger & Reverb MODULATIONS
REVERB+DELAY, REVERB+CHORUS,
Presets
Controls
16-position VARIATION selector
PEAK LED
MUTE SWITCH with LED indicator
Main Mix Section
Noise (Bus noise) Fader 0 dB, channels muted: 100dBr (ref.:+4dBu)
Max output
AUX Returns gain range
AUX Sends max out
electronically balanced, discrete input configuration
10Hz to 55kHz, + 3dB
0.005% at +4dBu, 1kHz
115dB
electronically balanced
10Hz to 55kHz, + 3dB
0.005% at +4dBu, 1kHz
+15dBu to 30dBu
Unbalanced
10Hz to 55kHz, 3dB
+
0.005% at +4dBu, 1kHz
1.4kOhm
2.5kOhm
10kOhm or greater
1kOhm
120Ohm
+ 15dB @12kHz
+ 12dB @2.5kHz
+ 15dB @80Hz
75Hz, 18dB/oct.
24 bit
24 bit
Hall, Room, Vocal & Plate REVERBS
REVERB+FLANGER combinations
256
16-position PRESET Selector
Fader 0dB, all input channels assigned and set to
UNITY gain: 90dBr (ref.:+4dBu)
+22dBu unbalanced, 1/4" jacks
- to +15dB
+22dBu
26
Power supply (AC/AC Adaptor)
Main voltage
Power Consumption
Physical
Dimension (W D H) 270mm 310mm 35/45mm
Net weight
Shipping weight 3.6Kg (7.94lb)
USA/Canada 100 120V~, 60Hz
Europe 210 240V~, 50Hz
U.K./Australia 240V~, 50Hz
11 watts (for AMX-100 model)
15 watts (for AMX-100FX model)
(7.79" 8.95" 1.01"/1.30")
3.0Kg (6.61lb)
27
D
8
MAIN OUT
AUX SEND1
TRS
AUX SEND
7654321
MAIN MIX
LEVEL
MAIN MIX LEFT
TRS
C
LEFT
RIGHT
TAPE OUT
TRS
MAIN MIX RIGHT
2-TRACK
TAPE IN
LEVEL
2TK IN
2
2
2TK TO MIX
1
3
1
1
3
3RIGHT BUS
2
2TK TO CTRL ROOM
B
LEFT
PHONES
TRS
RIGHT
TRS
TRS
PHONES OUTPUT
CONTROL ROOM OUTPUT
1
3
2
LEFT METER
RIGHT METER
& PHONES
CONTROL ROOM
A
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L-6 BLOCK DIAGRAM
ALTO MIXING CONSOLE
19-Dec-2003
L6MAP Sch
A2(C)
Titel
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AUX 1
EFX SEND
AUX-1
RIGHT-BUS
LEFT-BUS
RIGHT BUS
LEFT BUS
PAN
LEVEL
12K2 5K80
+/ 15db
LO MID HI
GAIN
3-BAND EQ
+
-
LEFT BUS
EFX SEND
AUX 1
AUX1
PRE
POST
1 2
1 2
RIGHT BUS
LEFT BUS
BALANCE
LEVEL
SG/OL
12K2.5K80
+/ 15db
LO MID HI
3-BAND EQ
-
+
LEFT BUS
RIGHT BUS
AUX 1
LEFT BUS
RIGHT BUS
AUX 1
EFX SEND
AUX-1
RIGHT-BUS
LEFT-BUS
AUX1
PRE
POST
1 2
1 2
SG OL
AUX RETURN1
12K2.5K80
EQ
DSP BOARD
-
+
MONO INPUT CHANNELS ( 1-2 )
T
RSRN
T
RSRN
STEREO INPUT CHANNELS (3-6)
TNTRSRN
3c5e1a4d2b
213
+48V
POWER
PHANTOM
M C IN
LINE IN
D
MIC GAIN:0~60dB
LINE IN TRIM:+15dB~-45dB
TN
3c5e1a4d2b
LEFT(MONO)
C
R GHT
3c5e1a4d2b
STEREO AUX RETURN 1
B
TNTRSRN
TN
3c5e1a4d2b
LEFT
RIGHT
MUTE
PRESETS
VARIATIONS
DSP FOOTSWITCH
1 2 3 4 5 6 78
A
D
8
C
B
A
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LEFT-BUS
RIGHT-BUS
AUX-1
LEFT-BUS
RIGHT-BUS
AUX-1
AMX-100FX (1/3)
Titel
INPUT MONO CH ( CH1-CH2 )
AMX-100FX
14-Sep-2004
AMX-100FX.Sch
A2
Size
File:
Date:
2K55
R287
VR10
W50K
PAN
2K32
R77
C89
C180
R256
47u/25V
22P
3K9
C90
R270
28K
VR9
LEVEL
2
7654321
C88
22P
1M
C179
R220
C87
47u/25V
C171
C163
18n(M)
VR4
B50K
1K1
R212
C131
18n(M)
EQ HI
12KHZ
47u/25V
W50K
12n(M)
47u/25V
2K55
R286
VR11
W50K
AUX-POST
2K32
R78
POST
6K8
R284
(PRE)
J1
1
U9A
NJM4580M
3
+VCC
PEAK
R264
1K5
24K9
R236
6K8
1K3
U9B
R197
VR5
R196
NJM4580M
910R
B50K
910R
R152
C195
2.2u/50V
C155
MID
2.5K
7
5
6
R137
LD1
RED
TR1
R47
PGND
BR
10K
6K8
R151
4K7
R248
TR2
R228
C140
BR
47K
33n(M)
12n(M)
VR3
B50K
6K8
R150
C139
33n(M)
LO
80HZ
R291
R79
PAN
C96
C164
VR7
C132
2K55
2K32
C183
R257
47u/25V
C181
18n(M)
B50K
18n(M)
22P
3K9
22P
VR13
EQ HI
W50K
C98
28K
R271
VR12
LEVEL
1M
R221
C94
C172
R213
12KHZ
C95
47u/25V
2
W50K
47u/25V
12n(M)
1K1
1
47u/25V
6
(SOLTON 1K2)用
R80
3
7
2K32
U10A
5
R139
2K55
R290
J2
4580M
R237
U10B
R199
VR8
1K3
R198
POST
24K9
4580M
910R
B50K
910R
VR14
W50K
AUX-POST
6K8
R288
(PRE)
NJM4580M
U9~ U10=
+VCC
PEAK
1K5
R265
6K8
R156
C196
2.2u/50V
C156
MID
2.5K
LD2
RED
TR3
R55
BR
10K
PGND
C104
C105
47u/25V
47u/25V
+VCC
R243
C182
47R
100n
312
U8E
LM339
312
U7E
LM339
84
U6C
NJM4580M
-VCC
47R
R242
PGND
100n
C178
BR
TR4
4K7
R249
47K
R229
6K8
C142
R155
33n(M)
12n(M)
VR6
B50K
6K8
R154
C141
33n(M)
LO
80HZ
C301
NJM4580M
C299
U6~ U5=
C291
C205
C203
100n
84
100n
84
100n
84
100n
84
100n
84
U10C
U9C
U5C
U2C
U1C
C302
C300
C292
C206
C204
100n
100n
100n
100n
100n
AMX-100FX
AMX-100FX.S02
AMX-100FX
AMX-100FX.S01
C17
R19
C1
U5A
C15
470P
47u/25
1
4580M
3
R27
5K11
R25
10K0
U1A
4580M
3
7K5
22u/35V
R5
2
1
2
VR1
C21
MIC 1
R23
R2
4
20K
R28
C29
R3
O10K
2K49
47u/63V
4R7
213
5K11
22P
5K11
C3
R15
C28
6K81 1/4W
470P
X1
C30
22P
C4
R1
SMC-6.02
22P
C27
R73
47P
PH PWR
4R7
R4
22P
5K11
6
27R
C23
1000u/10V
C22
R16
6K81 1/4W
3c5e1a4d2b
LINE IN1
7
47u/63V
-VCC
120R
-VCC
+VCC
TR9
BR
PGND
4K7
R124
LD7
RED
PHANTOM
R262
10K
PGNDPGND
PGND
LD16
TR14
RED
LD14
YEL
LD12
GR
LD10
GR
HR
D5
4148
7
D4
4148
5
6
D3
4148
1
D2
4148
3
2
R258
100K
L-METER
U6B
U6A
4580M
4580M
C191
R260
100K
R261
C190
R259
100K
47uF
10K
47uF
PGND
R255
100K
R-METER
+VCC
20K
R12
C20
47u/25
U5B
4580M
5
R33
5K11
C18
R21
22u/35V
7K5
C5
C24
R31
U2A
4580M
47u/63V
470P
10K0
3
1
R26
10K0
U1B
4580M
5
R24
2K49
R20
7K5
C16
22u/35V
R69
51K1
R68
470P
51K1
C2
X3
JY-6351G-02-250
LINE IN GAIN=+10~-40dB
MIC GAIN=-10~-60dB
7
6
C33
2
VR2
O10K
2K49
R29
4R7
R38
213
4
MIC 2
22P
R10
R17
C10
R34
5K11
6K81 1/4W
470P
5K11
C32
C11
X2
22P
47P
R37
PH PWR
4R7
SMC-6.02
C34
22P
C31
22P
R74
27R
R18
3c5e1a4d2b
LINE IN2
R11
6K81 1/4W
C26
5K11
6
1000u/10V
C25
+VCC
2K
R244
R32
10K0
7
U2B
47u/63V
4580M
5
R30
2K49
7K5
R22
C19
22u/35V
R386
51K1
R8
470P
51K1
C7
-VCC
RED
LD15
YEL
( 5) ( 18)
LD13
LEFT METER
GR
LD11
(-20) (0)
GR
LD9
TR13
U8B
LM339
1
U8C
LM339
14
U7B
LM339
1
U7C
LM339
14
HR
6
7
8
9
6
7
8
9
R250
470R
+VCC
PGND
LD8
R253
6K34
R254
6K8
R252
820R
R246
1K
100R
R251
GR
PGND
PH PWR
22K
R166
PWR ON
U8A
LM339
4
2
5
U8D
LM339
10
13
11
U7A
4
LM339
2
5
U7D
10
LM339
13
11
R247
470R
R103
10K
PGND
D1B
R245
120R
+VCC
D1A
DA204K
DA204K
R225
X4
JY-6351G-02-250
1 2 3 4 5 6 78
D
C
B
A
D
8
C
B
A
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AMX-100FX
INPUT STEREO ( CH3/4-CH5/6)
AMX-100FX (2/3)
14-Sep-2004
AMX-100FX.S01
A2
Titel
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File:
Date:
R102
C61
2K55
J3
47u/25V
U20B
4580M
POST
R40
10K0
AUX-1
VR24
W50K
AUX-POST
6K8
(PRE)
R104
R84
1M
R97
4K7
R138
PEAK
LD3
RED
TR5
R140
C64
U19B
PGND
BR
47K
47u/25V
4580M
BR
TR6
47K
7
5
6
C111
R89
C65
C110
22P
3K9
47u/25V
+VCC
1K50
R147
6K8
R116
C136
2.2u/50V
22P
C109
22P
R93
33K2
VR22A
LEVEL
R86
R106
R99
C103
2
W50K
1M
LEFT-BUS
2K55
2K32
47u/25V
1
3
24K9
R145
1
2
3
VR28
BAL
R61
U27A
4580M
C100
B50K
10K0
47u/25V
U26A
4580M
C113
R90
C101
47u/25V
22P
3K9
R60
R58
10K0
R94
VR22B
LEVEL
10K0
R100
33K2
6
2K32
7
W50K
R146
RIGHT-BUS
5
24K9
7654321
C107
R87
C59
47u/25V
C106
22P
3K9
22P
R92
C62
33K2
VR21A
LEVEL
R83
2K55
R101
2K32
R95
47u/25V
2
W50K
R143
1M
LEFT-BUS
1
24K9
2
RIGHT-BUS
VR23
B50K
22P
3K9
47u/25V
R41
R39
10K0
R91
VR21B
LEVEL
10K0
R96
33K2
6
W50K
R144
2K32
7
5
24K9
BAL
R42
10K0
U20A
C108
4580M
3
R88
C60
C58
47u/25V
1
U19A
4580M
3
R107
C102
2K55
J4
47u/25V
U27B
4580M
POST
R59
10K0
AUX-1
VR29
W50K
AUX-POST
6K8
(PRE)
R105
R85
1M
R98
4K7
R141
6
47K
LD4
TR8
7
PEAK
RED
BR
5
TR7
R142
C99
U26B
PGND
BR
47K
47u/25V
4580M
+VCC
R148
6K8
R119
C137
2.2u/50V
C112
1K50
22P
C154
100n
84
C152
100n
84
C150
100n
84
C148
100n
84
C147
100n
84
C143
100n
84
+VCC
U27C
U26C
U21C
U20C
U19C
U18C
C157
100n
C153
100n
C151
100n
C149
100n
100n
C146
C138
100n
-VCC
C47
18n(M)
VR15A
B50K
C37
18n(M)
EQ HI
C57
C51
R63
12KHZ
C8
R6
47u/25V
12n(M)
1K1
22P
10K0
R108
1K3
C55
R14
R128
910R
B50K
VR16A
R127
910R
47u/25V
1
10K0
2
R9
3
10K0
MID
U18A
2.5K
R122
4580M
C130
20K
R13
C6
12n(M)
10K0
22P
6K8
R113
VR17A
B50K
R112
6K8
C63
47u/25V
C115
10K0
R36
C48
33n(M)
VR15B
18n(M)
B50K
C52
R64
C114
C39
33n(M)
LO
80HZ
18n(M)
EQ HI
12KHZ
12n(M)
1K1
R109
1K3
R130
910R
B50K
VR16B
R129
910R
C133
MID
2.5K
12n(M)
6K8
R115
B50K
VR17B
R114
6K8
C125
10K0
R45
33n(M)
C124
33n(M)
LO
80HZ
C49
C40
18n(M)
VR18A
B50K
18n(M)
EQ HI
C68
C53
R82
12KHZ
47u/25V
12n(M)
1K1
R110
1K3
R136
910R
B50K
VR19A
R133
910R
C127
6K8
R118
C134
12n(M)
VR20A
B50K
R117
6K8
MID
2.5K
LO
C126
80HZ
10K0
R57
33n(M)
C41
33n(M)
PRE-CH5
C50
18n(M)
VR18B
B50K
18n(M)
EQ HI
C97
C54
R81
12KHZ
47u/25V
12n(M)
1K1
R111
R135
1K3
910R
B50K
VR19B
R134
910R
PRE-CH6
C129
6K8
R121
C135
12n(M)
B50K
VR20B
R120
6K8
MID
2.5K
LO
C128
80HZ
33n(M)
33n(M)
R62
NJM4580M
10K0
U18~ U21=
20K
PRE-CH5
R123
C56
47u/25V
7
10K0
R35
U18B
4580M
C9
22P
6
10K0
R7
R43
5
10K0
R44
C12
10K0
22P
C35
R48
22P
10K0
C66
47u/25V
10K0
R54
20K
R125
1
U21A
4580M
C36
R49
22P
10K0
10K0
R52
3
2
10K0
R50
C14
22P
C67
47u/25V
10K0
R56
6
PRE-CH6
7
5
10K0
R51
R126
U21B
C13
20K
4580M
10K0
R53
22P
C158
T
RSRN
TN
3c5e1a4d2b
LINE IN 3/4
100P
LEFT(MONO)
D
X5
C234
JY-6351G-02-250
100P
RSRN
3c5e1a4d2b
C159
TN
100P
T
RIGHT
X6
C235
JY-6351G-02-250
100P
X7
C239
JY-6351G-02-250
100P
RSRN
3c5e1a4d2b
C237
TN
100P
T
X8
C238
JY-6351G-02-250
100P
RSRN
3c5e1a4d2b
C236
TN
100P
T
RIGHT
LEFT(MONO)
LINE IN 5/6
1 2 3 4 5 6 78
C
B
A
D
C
B
A
DGND
R445
C400
+5VD
TR20
+VCC
TR21
D12
7805
7815A
1N4002
C403
1000uF/16V
R444
47u/25V
D16
4148
C408
1000uF/35V
PGND
PGND
20K
TR23
PH PWR
R443
C405
TIP122
SW10
10R
100uF/100V
D15
1N4002
R440
R442
C406
10K
R441
47uF/100V
390K
ZD1
1N5261
(47V 0.5W)
C407
47uF/100V
PGND
0R0
PGND
C404
47u/25V
-VCC
D11
4148
C409
1000uF/35V
TR22
PHANTOM PWR
7915A
PHANTOM
C402
D13
1N4002
D14
1N4002
47uF/100V
8
3c5e1a
4d
2b
R214
22P
C121
PHONES
120R
7
6
1
2
10K0
R70
X16
JY-6351G-02-250
R215
5
U22A
3
R216
120R
U22B
BA15218N
BA15218N
22P
C122
120R
R71
10K0
R217
120R
7
U23B
5
6
1
U23A
3
2
LEFT
AMX-100FX (3/3)
3c5e1a
4d
2b
T
RSRN
TN
120R
30K
R211
MOUT-L
7
R210
7654321
R163
22P
C119
R65
C74
X12
120R
10K0
47u/25V
MAIN OUT
JY-6351G-02-250
C118
22P
R209
120R
R162
3c5e1a
4d
RSRN
30K
RIGHT
X15
2b
TN
JY-6351G-02-250
T
R218
120R
MOUT-R
R72
10K0
1
C83
47u/25V
3c5e1a
4d
R219
120R
BA15218N
BA15218N
LEFT
CTRL ROOM OUT
X18
2b
R223
120R
JY-6351G-02-250
R222
3c5e1a
120R
RIGHT
X17
4d
2b
R224
120R
JY-6351G-02-250
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KEVIN LIN.
RevisionModel No:
Drawn By:
Sheet
AMX-100FX
14-Sep-2004
AMX-100FX.S02
STEREO AUX & SENDS & MAIN OUT & 2TK & CTRL R & PHONES
A2
Titel
Size
File:
Date:
3K6
R230
C72
47u/25V
AUX SENDS
R208
120R
22P
C38
R46
R446
C410
AUX SENDS
MAIN MIX
22P
C116
3c5e1a
4d
RSRN
C233
47u/25V
36K
5K6
47u/25V
22P
C42
LEFT
2b
TN
6
VR25B
R178
T
7
5
39K2
R161
6
W50K
2K7
R207
VR30
C70
6
LEFT-BUS
120R
20K
R192
U24B
4580M
W50K
47u/25V
2
AUX-1
AUX-1
5
7
X11
1
U15B
R226
C71
5
JY-6351G-02-250
R322
U24A
3
4580M
R231
C73
30K
47u/25V
U14B
NJM4580M
AUX-SEND
C43
30K
4580M
STEREO AUX
2
3K6
W50K
VR25A
47u/25V
RIGHT
MAIN MIX
2K7
R179
22P
C117
LEFT-BUS
LEFT-BUS
2K
R177
56K
R205
1
22P
2
W50K
VR26A
R203
33K
AUX RETURNS
C69
47u/25V
EFXRTN-L
AUX-RTN1-L
3c5e1a4d2b
RETURN1
LEFT 1
2
3
3
1
RIGHT-BUS
C77
U13A
R131
C188
U15A
3
47u/25V
4580M
22K
100P
X9
4580M
30K
R227
C81
47u/25V
U14A
C44
JY-6351G-02-250
NJM4580M
22P
R340
3c5e1a4d2b
56K
R206
W50K
VR26B
R204
33K
C75
47u/25V
EFXRTN-R
2K
R180
6
AUX-RTN1-R
RIGHT 1
RIGHT-BUS
RIGHT-BUS
7
C189
5
R132
100P
C78
22K
X10
47u/25V
U13B
4580M
JY-6351G-02-250
CONTROL
TAPE OUT
TAPE IN
ROOM
PHONES/
X21
C82
36K
R164
22P
C46
7K5
R238
VR27A
C80
47u/25V
2TK TO
CTRL ROOM
LEFT-BUS
2TK TO MIX
22P
C120
R194
C76
1K
R232
1 4
SCP6873NS3232
L(WHITE)
47u/25V
1
2
W50K
27K
R234
123
3
VR31A
C79
47u/25V
6
33K2
47u/25V
2 5
R(RED)
3
2
7
W50K
U17A
1
R181
5
20K
R193
C144
R233
R67
10K0
4580M
L-METER
5K11
R66
U16B
100P
1K
6
3
22P
C45
SW2A
SW1A
10K0
4580M
R165
7K5
R239
C86
47u/25V
PS-22E85L
PS-22E85L
C123
R76
36K
RIGHT-BUS
22P
10K0
7
5
6
W50K
VR27B
456
P
6
C85
33K2
R200
C84
47u/25V
C93
R235
5
VR31B
W50K
47u/25V
1
2
47u/25V
U17B
4580M
27K
P
3
R195
R-METER
SW2B
4
R182
U16A
20K
C145
PS-22E85L
5K11
R75
10K0
4580M
100P
SW1B
PS-22E85L
SW11
1
CN1
AC IN
C176
100n
C91
47u/25V
84
84
47R
R241
C174
100n
84
C170
100n
84
C168
100n
84
C166
100n
84
C162
100n
84
C160
100n
84
+VCC
NJM4580M
U24=
PGND
2
U23C
BA152 8N
U22C
BA152 8N
R240
U13C
U14C
U15C
U16C
U17C
U24C
NJM4580M
U13~ U17=
47R
-VCC
C177
C92
C175
C173
C169
C167
C165
C161
100n
47u/25V
100n
100n
100n
100n
100n
100n
C401
47uF/100V
123456789101112131415
CN2
GND
+VCC
-VCC
NetC221 1
NetC223 1
NetTR15 C
+5VD
NetCN6 16
NetU49 1
EN2
124
SDB161PVB15FS
AR2
+5VD
AR1
DSP
123
680R*4
7 8
5 6
3 4
1 2
124
EN1
SDB161PVB15FS
123
680R*4
7 8
5 6
3 4
1 2
CN6
HEADER 8X2
+5VD
3c5e1a
4d
FOOTSWITCH
R319
NetLD17 2
LD17
RED
+VCC
PEAK(FLICKER)
MUTE(GLOW)
NetC221_1
C221
4.7uF
RL1B
RY-5W-K
(MUTE)
5
3
7
EFXRTN-L
EFXRTN-L
NetC222 1
COM
COM
2b
220R
PGND
NetR278 2
NetU49 1
C223
DGND
NetLD17_2
NetC197 2
DGND
PRESETVARIATION
8
4
8
4
12345678910
NetR292_2
NetC197_2
X22
+5VD
NetC223_1
4.7uF
4
EFXRTN-R
EFXRTN-R
16
FX-DSP
NetR292 2
NetR278 2
JP1
DGND
1112
1314
1516
NetCN6 16
JY-6351G-02-250
SW9
PS-22E85NL
(MUTE)
R320
220R
C214
12
RL1A
RY-5W-K
RL1C
RY-5W-K
(MUTE)
6
8
DGND
100N
PGND
D8
C222
4.7uF
4148
NetTR15 C
NetC222 1
AUX-SEND
1 2 3 4 5 6 78
AUX-SEND
D
C
B
A
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PCB : AMX-100FX Top Overlay