Alto MX-30P Service Manual
MODEL: MX-30P
www.altoproaudio.com
Version 1.0
CONTENT
1. Introduction…………………………………………………………………….1
2. Specification…………………………………………………………………...2
3. Block Diagram…………………………………………………………………3
4. Schematic Diagram…………………………………………………………..4
5. Wiring Diagram……………………………………………………………….10
6. PCB Layout……………………………………………………………………12
7. Exploded View & Mechanical Parts List……………………………………30
8. BOM........................................................…………………………………..35
1. Introduction
z 3 phono + 3 line stereo inputs
z 1 Mic input
z GAIN and 3-band “KILL” EQ for stereo inputs
z Crossfader curve control
z Discrete levels for main amplification and DJ booth
z Talk on (Voice-over) switch and level
z Master PFL level and balance (Input 1 / Input 2)
z Dynamic power: 300W + 300W @ 4Ω
- 1 -
2. Technical Specification
Model NO: MX-30P ( 3-CHANNEL MIXER )
AUDIO INPUTS
Phono Inputs 1,2 and 3 40dB gain@1kHz,unbalanced
Line Inputs 1,2 and 3 0dB gain, unbalanced
Mic Input 40dB gain, servo-balanced
Return 0dB gain, unbalanced
AUDIO OUTPUTS
Headphones typically 125mW@ 1% THD
Main Out max +21dBu
Booth Out max +21dBu
Tape Out typically 0dBu
Send typically 0dBu
GENERAL
Stereo Bass +15dB/-30dB@50Hz
Stereo Middle +15dB/-30dB@2.5KHz
Stereo Treble +15dB/-30dB@10Khz
Input Gain Adjustment -20dB-+9dB (+3dB)
Signal-to-Noise ratio(S/N) >85dB(LINE)
Distortion(THD) <0.1%
Frequency Response 20Hz-20KHz (±2dB)
POWER AMP SECTION
Power AMP output 300W+300W @ 4ohm
POWER SUPPLY
Main voltage USA/Canada 100-120V~, 60Hz
Europe 210-240V~, 50Hz
U.K./Australia 240V~, 50Hz
Rated Power Consumption 400 watts
Fuse 100-120V~ : T4AL
210-240V~ : T2AL
DIMENSIONS AND WEIGHT
Dimension 288(L)X250(W)X76.6/100(H)mm
Net weight XXKg
Shipping weight XXKg
- 2 -
3. Block Diagram
D
8
TYPE
(EFFECTS)
RETURN TO MAIN
L
L
(MAIN OUT)
R
AMP
(MAIN OUT)
R
C
MOOTH
(MAIN OUT)
R
L
R
L
B
RED
BLACK
BLACK
RED
A
SPEAKER OUT
7654321
GAIN
GAIN
GAIN
GAIN
SEND FROM PFL
(EFFECTS)
D300W
L
POWER AMP
D300W
POWER AMP
R
3c5e1a
4d
2b
PHONES OUT
PFL LEVELPFL MODE
PFL MIX
(PFL) ( MAIN)
3c5e1a
4d
2b
HI
LO MID
MIC INPUT
P
C
A
123
A
3-BAND EQ
8
9
123
LINE
PHONO
Voltage Controlled Amplifier
HI
GAIN
101112
D
P
B
6
456
B
3-BAND EQ
5
LO MID
GAIN
7
PHONO
HI
LO MID
9
P
4
P
C
A
123
A
P
123
LINE
8
PHONO
3-BAND EQ
7
LINE
HI
LO MID
GAIN
GAIN
101112
D
P
B
6
456
B
3-BAND EQ
4
5
LINE
PHONO
HI
LO MID
9
P
PHONE / LINE
P
C
A
123
3-BAND EQ
7
8
HI
LO MID
GAIN
GAIN
101112
D
P
B
6
3-BAND EQ
4
5
P
PHONE / LINE
LEVEL METER
123
P
A
LINE
PHONO
456
B
P
LINE
PHONO
CHANNEL 1(INPUT)
PHONO LINE
L
123
A
CHANNEL 2(INPUT)
R
456
B
LINE
PHONO
D
PHONO
PHONO LINE
L
P
LINE
R
C
CHANNEL 3(INPUT)
PHONO LINE
L
R
1 2 3 4 5 6 78
B
A
- 3 -
4. Schematic Diagram
1110987654321
R373
TR15
SW6D
SW PS-42E85L
10
11
12
P
-15V
D
SW6C
SW PS-42E85L
7
8
9
P
R370
100K
CHANNEL 3
SW
C1
10uF/25V
R1
47K
1
2
3
6
5
4
PHONE/ LINE
SW1A
SW1C
P
SW1B
SW1D
P
P
R153
100R
MIC IN
PHONO R3
C
PHONO L3
VR1A
10KC
2
R24
3
2K49
9
8
7
GAIN
10
VR1B
10KC
11
12
R154
100R
6
5
R25
2K49
P1
CHANNEL 1
SW
PHONE/ LINE
SW2A
CN2
14PIN
LINE R1
1
LINE L1
2
3
PHONO R1
4
PHONO L1
5
6
LINE R2
7
LINE L2
8
9
PHONO R2
10
PHONO L2
11
12
13
PHONO R3
14
B
PHONO L3
SW2C
P
1
2
3
SW2D
SW2B
P
6
5
4
P
VR5A
10KC
2
R51
3
2K49
9
8
7
GAIN
VR5B
10KC
10
11
12
6
5
R52
2K49
CHANNEL 2
SW
PHONE/ LINE
SW3A
SW3C
P
1
2
3
SW3B
SW3D
P
6
5
4
P
A
IC18C
4580
+15V
84
411
C57
IC1E
100n
TL074
C58
100n
-15V
411
C220
100n
C221
100n
IC2E
TL074
C222
100n
C223
100n
1
VR9A
2
10KC
R56
3
2K49
9
3
8
7
GAIN
4
VR9B
10
10KC
R57
2K49
IC3E
TL074
6
5
6
411
11
12
R367
J112
3K3
R2
R369
R379
47K
100K
R368
TR16
3K3
J112
C2
10uF/25V
R27
1K5
C37
220P
1
IC1A
TL074
R26
1K5
C38
220P
7
IC1B
C8
TL074
10uF/25V
C7
10uF/25V
R34
1K5
C40
220P
1
IC2A
TL074
R33
1K5
C39
220P
7
IC2B
C9
TL074
10uF/25V
C16
10uF/25V
R44
1K5
C41
220P
2
1
IC3A
TL074
R45
1K5
C42
220P
5
7
IC3B
C17
10uF/25V
TL074
411
C154
IC7E
100n
TL074
C155
100n
L2
R380
47K
C55
10n
C62
10n
IC11E
TL074
R114
C45
4k7
150n
R63
33k
R32
1K5
1
R88
9
3K3
10
C73
3
6n8
R82
R106
8K06
18K
1
R115
C46
4k7
150n
R64
33k
R31
1K5
4
R92
13
3K3
12
C75
6
6n8
R108
C63
R84
18K
8K06
10n
4
R124
C50
4k7
150n
R70
33k
R42
1K5
1
R91
9
3K3
10
C74
3
6n8
R83
R107
8K06
18K
1
R126
C51
4k7
150n
R72
33k
R41
1K5
4
R93
13
3K3
12
C76
6
6n8
R109
C64
R85
18K
8K06
10n
4
C52
R125
4k7
150n
R71
33k
R43
1K5
1
R100
9
3K3
10
C77
6n8
3
R86
C66
8K06
10n
R112
18K
1
R139
C54
4k7
150n
R78
33k
R49
1K5
4
R101
13
3K3
12
C78
6
C67
10n
411
6n8
R87
8K06
R111
18K
4
C158
100n
C159
100n
C43
150n
C47
150n
2
R29
1K5
3
VR2A
LOW
50KE
R28
1K5
VR3A
50KE
MID
1
R62
33K
2
VR4A
R50
50KE
HIGH
2K49
3
2
C44
150n
5
R30
1K5
6
VR2B
LOW
50KE
R36
1K5
VR3B
MID
50KE
4
R68
33K
5
HIGH
R54
6
2K49
VR4B
5
50KE
2
R38
1K5
3
VR6A
LOW
50KE
R35
1K5
VR7A
50KE
MID
1
R67
33K
2
VR8A
R53
50KE
HIGH
3
2K49
2
C48
150n
5
R40
1K5
6
VR6B
LOW
50KE
R37
1K5
VR7B
MID
50KE
4
R69
33K
5
HIGH
R55
6
2K49
VR8B
5
50KE
C49
150n
2
R39
1K5
3
VR10A
LOW
R46
50KE
1K5
VR11A
50KE
MID
1
R77
33K
2
R59
VR12A
2K49
50KE
HIGH
3
2
C53
150n
5
R48
1K5
6
VR10B
LOW
R47
50KE
1K5
VR11B
MID
50KE
4
R76
5
33K
VR12B
R58
50KE
HIGH
2K49
6
5
C156
100n
C157
100n
C79
C81
IC12E
TL074
Port-L1
Port-R1
C80
5n6
R65
33k
C85
56p
5n6
C86
56p
C82
5n6
C87
56p
5n6
C88
56p
C83
5n6
C89
56p
C90
56p
411
PHONE/LINE OUT L3
8
IC1C
TL074
C3
10uF/25V
SW4B
P
R66
33k
PHONE/LINE OUT R3
14
TL074
TL074
TL074
TL074
TL074
C84
5n6
R73
33k
8
R74
33k
14
R75
33k
8
R79
33k
14
C160
100n
C161
100n
C10
10uF/25V
SW4A
PHONE/LINE OUT L1
PHONE/LINE OUT R1
C11
10uF/25V
SW5A
PHONE/LINE OUT L2
PHONE/LINE OUT R2
C18
10uF/25V
SW7A
411
IC13E
TL074
IC1D
IC2C
IC2D
IC3C
IC3D
R386
100K
R385
100K
C6
10uF/25V
R89
3K3
4
5
6
C12
10uF/25V
R94
3K3
1
2
3
R95
3K3
1
2
3
R102
3K3
1
2
3
2
3
6
5
MIC OUT L
MIC OUT R
R96
3K3
R97
3K3
R103
3K3
C224
100n
C225
100n
57K6
C230
IC16A
C232
47P
10uF/25V
1
4
5
6
4
5
6
IC17C
4580
L-METER
C233
10uF/25V
7
R-METER
R362
100K
R363
100K
VR13A
B100K
VR13B
B100K
R99
R98
3K3
3K3
+15V
GRN
LD2
PHONES(L)
R105
R104
3K3
3K3
+15V
GRN
LD24
84
C240
100n
C241
100n
4580
R374
57K6
C231
IC16B
47P
4580
R147
20K
R361
20K
R393
1K15
R90
3K3
+15V
R144
1K
GRN
LD1
R394
1K15
C13
10uF/25V
SW5B
P
C14
10uF/25V
SW7B
P
PHONES(R)
C22
10uF/25V
C56
10uF/25V
R155
1K
R158
1K
R148
22R
R149
22R
+15V
IC16C
2068
-15V
84
C238
104
C239
104P
+15V
D5A
DA204K
+15V
-15V
L-METER
R-METER
PGND
DA204K
PHONES OUT L
PHONES OUT R
SHARP
SMOOTH
SEND L
SEND R
AMP L
AMP R
TR17
J112
R381
47K
TR18
J112
R382
47K
R2
10K
C4
47P
13
14
12
IC7D
TL074
R113
1K
R110
10K
C5
47P
2
1
3
IC7A
TL074
R116
1K
R391
15K
C244
47P
9
8
C246
47P
7
CN3
10PIN
CN4
16PIN
15218N
10uF/25V
1
2
3
4
5
6
7
8
9
10
IC14C
C245
C247
10uF/25V
MIC IN
PHONES OUT R
PHONES OUT L
SHARP
SMOOTH
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
84
MIC IN
RETURN L
RETURN R
TAPE L
TAPE R
BOOTH L
BOOTH R
PHONES(R)
PHONES(L)
R150
22R
R151
22R
10
6
5
47uF/25V
47uF/25V
C209
C210
IC7C
TL074
R392
15K
IC7B
TL074
TR1
R117
HR
120R
R121
PGND
R141
100K
R140
100K
10K
R119
TR2
HR
2
3
470R
R120
470R
C105
47P
D1
4148
R142
100K
SW6A
SW PS-42E85L
IC6A
4580M
PGND
1
D6
4148
R145
C19
10K
47u/25V
PGND
+15V
R174
SW6B
2K2
SW PS-42E85L
1
2
3
4
5
P1
LD3
6
GRN
P
C23
10uF/25V
R213
27K
C24
10uF/25V
R212
27K
D5B
R118
120R
+15V
-15V
(-20) (-10) (-7) (-4) (-2) (0) (+2)
LD4GRLD5GRLD6GRLD7GRLD8GRLD9
IC5C
R122
150R
14
13
IC5D
LM339
LM339
8
9
10
11
R123
470R
4
5
7
IC5A
LM339
2
1
R129
330R
6
IC5B
LM339
14
13
IC4D
LM339
9
10
11
R127
470R
4
5
7
IC4A
LM339
2
1
LD14GRLD15GRLD16GRLD17GRLD18GRLD19
C106
47P
D7
4148
6
7
5
R214
27K
R215
27K
IC6B
4580M
R143
100K
84
IC6C
4580M
+15V
BAT54 ( FM103 )
R290
10K
MIC OUT RMIC OUT L
13
IC12D
12
13
IC13D
12
TL074
R3
47K
D17
0.47u/50V
R216
27K
TL074
R217
27K
C25
10uF/25V
C198
C216
150P
C215
150P
D8
4148
C21
47u/25V
312
IC5E
LM339
R138
4K7
R338
100R
14
C201
10u/25V
14
PGND
R146
10K
PGNDPGND
312
IC4E
LM339
R340
1M2
2
3
IC11A
TL074
R339
560K
R297
10K
R296
10K
IC4C
LM339
8
6
IC4B
LM339
IC8E
LM339
(+4) (+7) (+10)
LD10GRLD11GRLD12
GR
IC8C
14
13
IC8D
LM339
LM339
8
9
10
11
R130
R128
330R
470R
4
5
7
IC8A
2
1
LM339
312
312
IC9E
IC10E
LM339
LM339
MAIN OUT
VR16
50KB
D2
-15V
3
4148
1
VR14
100KB
C199
10u/25V
1
C27
R303
22K
10uF/25V
C91
56P
6
7
IC12B
5
TL074
R300
22K
C92
56P
6
7
IC13B
5
TL074
C26
10uF/25V
R131
510R
6
IC8B
LM339
GR
312
TALK
13
10
11
5
2
C103
100n
C104
100n
2
R10
47K
R2
R375
10K
L2
R378
15K
R377
10K
14
IC9D
IC9C
LM339
LM339
8
9
R132
R133
620R
1K3
4
6
7
IC9A
IC9B
LM339
1
LM339
LD20GRLD21GRLD22
R137
+15V
47R
PGND
R136
-15V
47R
R291
10K
R341
150K
R184
51K1
10
R180
9
1M
R376
15K
C234
56P
6
5
IC17B
4580
OUT A LEVEL
C236
2
56P
3
IC17A
4580
OUT A LEVEL
13
11
5
C102
47u/25V
C15
47u/25V
C94
27n
R187
200K
C235
10uF/25V
7
VR20A
10KA
C237
10uF/25V
1
VR20B
10KA
2
SHARP
YEL
IC10D
LM339
9
10
R1342KR135
4
IC10A
LM339
YEL
D3
4148
8
IC11C
TL074
R383
1K
C28
10uF/25V
R384
1K
6
10uF/25V
4
LD13
RED
-15V
SEND L
R343
C189
20P
IC13C
180K
C187
20P
R80
33K
6
5
IC18B
2068
R5
R4
47K
47K
PFL MIX
R6
VR17A
R81
33K
2
3
PFL MIX
5
6
C205
47uF/25V
8
Port-R1
C204
47uF/25V
8
Port-L1
VR17B
2
5
20KB
R344
180K
C193
20P
20KB
R292
10K
R185
51K1
R359
1K2
BAL A
BAL A
R360
1K2
100K
3
R18
100K
IC18A
2068
R17
47K
R20
100K
4
R19
100K
C95
27n
R188
200K
1
SEND R
R16
47K
6
R342
150K
R181
1M
R11
47K
TL074
R8
39K
C190
20P
TL074
IC10C
14
LM339
8
+15V
44K2
6
7
IC10B
LM339
1
-15V
LD23
RED
D4
4148
-15V
VR15
100KB
R9
39K
9
IC12C
R355
10
22K
5
9
C29
10
R356
22K
C200
10u/25V
7
C202
10u/25V
1
SMOOTH
7
IC11B
TL074
R21
47K
VR18A
20KB
VR18B
20KB
R7
47K
PFL MODE
SW8A
SW8B
P
R168
1K
R1691KR170
R22
47K
R200
511R
C98
560P
C34
10uF/25V
R23
47K
C35
10uF/25V
R208
27K
C99
560P
MAIN RMAIN L
C30
10uF/25V
C31
10uF/25V
1
2
3
4
5
6
VR21A
10KA
VR21B
10KA
R171
1K
1K
23VR19A
50KB
PFL LEVEL
1
56VR19B
50KBA
PFL LEVEL
4
+15V
R205
30K
MODE1V+
2
I IN1
3
I C1
4
I OUT1
5
I OUT2
6
V C2
7
I IN2
8
GND
R209
R201
27K
511R
3
OUT B LEVEL
2
C32
10uF/25V
1
6
OUT B LEVEL
5
C33
10uF/25V
4
R357
22K
R358
22K
PHONES(L)PHONES(R)
R210
27K
47uF/25V
47uF/25V
IC15
SSM2164
C203
C208
R390
R388
R202
511R
I OUT4
I OUT3
C100
560P
2
3
2
3
I IN4
V C4
V C3
I IN3
R389
0R
R387
0R
V-
R60
2K49
C20
10uF/25V
R61
2K49
C36
10uF/25V
+15V
-15V
R211
27K
R12
47K
C191
20P
IC12A
R13
47K
C192
20P
IC13A
R349
12K
C188
20P
6
5
IC14B
R314
BA15218N
100K
R350
12K
C194
20P
2
3
IC14A
R315
BA15218N
100K
C243
10uF/25V
C242
10uF/25V
16
15
14
13
12
11
10
9
R203
511R
C101
560P
PHONE/LINE OUT L1
PHONE/LINE OUT L2
PHONE/LINE OUT R1
PHONE/LINE OUT R2
C206
1
47uF/25V
TL074
C207
TL074
1
47uF/25V
R159
1K
R160
1K
MAIN R
MAIN L
7
1
BOOTH R
R14
47K
BOOTH L
R15
47K
12
R352
47R
PHONES OUT L
R351
47R
R353
47R
PHONES OUT R
R354
47R
MIC OUT R
MIC OUT L
D
C
B
A
1 2 3 4 5 6 7 8 9 10 11 12
- 4 -
7654321
8
IC2A
5218
IC2B
5218
C6
10uF/25V
C5
100P
C7
10uF/25V
C4
100P
10uF/25V
C19
1
C20
10uF/25V
7
CHANNEL 3
PHONO (INPUT3)
X2
CN-RCA2-4PORT
D
PHONO
LINE
C
PHONO
LINE
L
R
SW2A
SW PS-22E85L
C12
100P
SW2B
SW PS-22E85L
P
C13
100P
LINE (INPUT3)
C1
47uF/25V
1
2
3
C14
47uF/25V
4
5
6
C16
10uF/25V
C15
10uF/25V
R1
120R
R12
120R
R13
47K
47K
L
R
C2
27n
C17
27n
R14
C3
6n8
R2
10K
R3
100K
2
3
C18
6n8
R15
10K
R16
100K
6
5
R17
47K
R4
47K
R18
47K
R5
47K
R19
2K2
R6
2K2
R7
2K2
R20
2K2
LINE L2
LINE R2
PHONO L2
PHONO R2
SW1C
P
SW PS-42E85L
SW1D
P
SW PS-42E85L
7
8
9
10
11
12
CHANNEL 1
PHONO (INPUT1)
X1
CN-RCA2-4PORT
PHONO
LINE
PHONO
LINE
L
R
SW1A
SW PS-42E85L
C22
100P
SW1B
SW PS-42E85L
P
C21
100P
LINE (INPUT1)
C8
47uF/25V
1
2
3
C24
10uF/25V
C23
47uF/25V
4
5
6
C25
10uF/25V
R8
120R
R21
120R
R22
47K
R23
47K
L
R
C9
27n
C26
27n
-15V
+15V
+5V
C10
6n8
R9
10K
R10
100K
2
3
6
5
C27
6n8
R24
10K
R25
100K
IC1A
IC1B
5218
2068
C11
10uF/25V
1
C28
10uF/25V
7
R26
47K
R27
47K
R28
2K2
R11
2K2
PHONO L1
PHONO R1
CN2
16P-2.0
1
RETURN L
2
RETURN R
3
SEND L
4
SEND R LINE R2
5
6
7
8
9
10
11
TAPE L
12
TAPE R
13
BOOTH L
14
BOOTH R
15
AMP L
16
AMP R
-15V
+15V +5V
PHONO R1
PHONO L1
LINE L2
PHONO R2
PHONO L2
LINE R3
LINE L3
PHONO R3
PHONO L3
5
4
3
2
1
CN3
5P-2.5
CN1
14P-2.0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
D
C
IC3A
5218
IC3B
5218
C40
10uF/25V
C39
100P
C41
10uF/25V
C38
100P
10uF/25V
C42
1
C56
10uF/25V
7
CHANNEL 2
PHONO (INPUT2)
X3
CN-RCA2-4PORT
B
PHONO
LINE
PHONO
A
LINE
L
R
SW3A
SW PS-22E85L
C49
100P
SW3B
SW PS-22E85L
P
C50
100P
LINE (INPUT2)
C35
47uF/25V
1
2
3
C51
47uF/25V
4
5
6
C53
10uF/25V
C52
10uF/25V
R29
120R
R40
120R
R41
47K
47K
L
R
C36
27n
C54
27n
R42
C37
6n8
R30
10K
R31
100K
2
3
C55
6n8
R43
10K
R44
100K
6
5
R45
47K
R32
47K
R46
47K
R33
47K
R47
2K2
R34
2K2
R35
2K2
R48
2K2
LINE L3
LINE R3
PHONO L3
PHONO R3
SEND FROM PFL(EFFECTS) RETURN TO MAIN(EFFECTS)
R36
SEND L RETURN L
SEND R
1K
C43
470P
R37
1K
C44
470P
X4
CN-RCA2-4PORT
L
R
L
C45
100P
R
C46
100P
RETURN R
BOOTH ( MAIN OUT) TAPE ( MAIN OUT)
X5
CN-RCA2-4PORT
L
R
C59
470P
C60
470P
R52
100R
R51
100R
TAPE L
TAPE R
BOOTH L
BOOTH R
R49
100R
R50
100R
C57
470P
C58
470P
L
R
AMP L
AMP R
IC1C
5218
AMP ( MAIN OUT)
X6
CN-RCA2-4PORT
L
R
C33
100P
C34
100P
B
A
C47
470P
C48
470P
IC2C
5218
L
R
-15V
C31
100P
IC3C
5218
8 4
C32
100P
8 4
+15V
R38
100R
R39
100R
C29
100P
8 4
C30
100P
1 2 3 4 5 6 78
- 5 -
D
C
B
A
+15V
4321
PHONES OUT R
PHONES OUT L
-15V
MIC IN
R32
62KC9100P
R9
68K1
D1
3c5e1a4d2b
PHONES IN
X2
PHONEJACK5 (5-PIN)
6
1K
R29
C7
10uF/25V
3c5e1a4d2b
MIC IN
X1
PHONEJACK5 (5-PIN)
R10
2K21D2
4148
123456789
X6
SMOOTH
D6
7
IC3B
2068
C12
R30
100P
5
R31
62K
1K
C8
10uF/25V
7
R11
240K
C3
22P
6
R27
IC2B
5
D5
4148
10K
33K
R21
CURVE
CROSSFADER
TL074
4148
R6
5K62R5
-15V
1
IC1A
2068
3
2
R7
4K99
R8
240K
4148
1
C10
2n7
IC2A
3
2
R26
36K
R20
R19
2
3
VR1A
100KB
68K1
R16
D3
10K
4148
TL074
47K5
1
R28
10K
-15V
R17
R14
R15
10
2K21
D4
4K99
240K
10P
D7
4148
CROSSFADER
R18
240K
4148
2n7
C11
33K
R23
CURVE
6
-15V
R13
SHARP
D8
4148
14
IC2D
TL074
12
13
-15V
R25
47K5
R24
36K
R22
10K
5
4
VR1B
100KB
8
C5
C4
22P
IC2C
9
10
5K62
7
IC1B
2068
5
6
100nC6100n
TL074
411
IC2E
TL074
84
IC3C
2068
84
IC1C
+15V
2068
-15V
+15V
D
C1
10n
123
4
CN1
4P-2.5
R2
R1
6K34
4K99
100K
REVERSE HOLD
SW1
1
2
3
48
R3
1K65
-15V
R4
10R
R12
100K
C2
10n
5
6
7
1 2 3 4
REVERSE TAP
C
B
A
- 6 -
7654321
FOR MX20P,MX30P
8
D300W (1/1)
-25C
fbla
sla
rla
ela
dia1
-25
R28 1K0
C49
220N
+25
5
13
17
SW2
16
REL2
14
ENA2
9
VSTAB
15
POWUP
3
DIAG
4
ENA1
2
REL1
1
SW1
VDD2
VSS2
10
-25
VDD1
VSS1
8
BOOT2
BOOT1
OUT2
OUT1
U8TDA8926
12
11
7
6
C40
22N
C41
22N
+25 -25
C29
560P
R39
5R60
R41
5R60
C32
560P
+25 -25
C30
560P
R40
5R60
L3
TWKC-22UH
L4
TWKC-22UH
R42
5R60
C33
560P
GND GND
C151
2N7 COG
R63
100R
TWKC-22UH
TWKC-22UH
R64
100R
C152
2N7 COG
GND GND GNDGND CASE
L10
L11
C18
470N MKT
R65
47R0
C21
470N MKT
R66
47R0
C50
220N
C62
1N(NPO)
TE11
C110
10N(NPO)
D
-OUT
+25C
3
10
GND
11
4
5
2
7
6
8
9
U6
IN1-
IN1+
SGND1
OSC
MODE
SGND2
IN2+
IN2-
TDA8929
VDD1
VDD2
DIACUR
DIATEMP
STABEX
STABINT
VSS1
VSS2
1
12
-25C
FB1
SW1
REL1
ENA1
ENA2
REL2
SW2
FB2
20
24
23
21
22
-25C
15
C48
18
19
220N
16
14
13
17
C59
1N
TE2
D
GND
AF IN
TE1
-25C
C20
10U/16V
C22
10U/16V
R31
27K
MUTE
C34
220N
R26
5K60
R27
5K60
C28
560P
GND
+25
5
C
-25
R35
1K0
C105
C23
2200U/35V
TE3
+VCC
B
TE4
GND
TE5
-VCC
C24
2200U/35V
+25
-25
L1
ferrite bead
C14
2200U/35V LOW ESR
C15
2200U/35V LOW ESR
L2
ferrite bead
100U/35V LOW ESR
+25C
GND
C106
-25C
100U/35V LOW ESR
C45
220N
C46
220N
C47
220N
GND
GND
C8
220N
C9
220N
C10
220N
C54
220N
17
16
14
9
15
3
4
2
1
U9
SW2
REL2
ENA2
VSTAB
POWUP
DIAG
ENA1
REL1
SW1
TDA8926
13
VDD2
VSS2
10
-25
VDD1
VSS1
8
BOOT2
BOOT1
OUT2
OUT1
C43
C42
22N
12
11
7
6
22N
+25 -25
C36
560P
R43
5R60
R44
5R60
C37
560P
+25 -25
C38
560P
R45
5R60
L5
TWKC-22UH
L6
TWKC-22UH
R46
5R60
C39
560P
GND
R29
100R
R30
100R
GND GND GND CASE
GND
C153
2N7 COG
C26
470N MKT
L12
TWKC-22UH
L13 TWKC-22UH
C27
470N MKT
C154
2N7 COG
GND
R68
47R0
R70
47R0
C56
220N
C64
1N(NPO)
TE13
C111
10N(NPO)
C
+OUT
B
A
GND
C5
470N
+25
C6
470N
-25
C7
470N
GND
1 2 3 4 5 6 78
C71
470N
C72
470N
C73
470N
C60
470N
C55
470N
C61
470N
C31
470N
C16
470N
C63
470N
C44
470N
C4
470N
MUTE
+25C
GND
R1
56K
D8
ZD5.6
A
- 7 -
D
4
C
1
2
3
CN3
3P-2.5
B
A
1
5P-2.5
GND1
C47
7
10u/63V
D12
5V1
R68
5V1
10K
U5B
4580M
R71
43K
10u/63V
R43
43K
10K
GND1
GND1
C51
100n
8
+15V
U5C
GND1
4580M
4
-15V
C54
100n
5
6
R41
C46
680P
C49
D11
GND1
2
3
3P-2.5
C44
1
10u/63V
D10
5V1
R66
5V1
10K
U5A
4580M
R67
43K
10u/63V
43K
R42
GND1
GND1
10K
3
2
R40
C42
680P
C48
D9
321
CN4
1
2
3
4
5
DC OUT
CN2
C21
C15
10uF/25V
-15V
C33
100n
X1
7915
C29
1000uF/35V
L2
3.5mH
D2
1N4004
D
10uF/25V
+15V
C35
100n
X3
7815
C31
1000uF/35V
L1
3.5mH
D5
1N4004
1 2 34
1
2
3
3P-2.5
CN1
C
B
A
- 8 -
D
8
C
B
A
+24V
F1-T5 AL-250V
4A
D11
SR506
7654321
MX30P-PWR (1/1)
R8
3K3
D1
BY228
C5
470uF/35V
C7
22uF/16V
GNDGND
R13
4K99 1%
C11
22uF/16V
R30
TRIMMER 200R
R20
15K
D6
BY228
C14
470uF/35V
R22
11K 1%
F2-T5 AL-250V
D12
-24V
4A
SR506
CN3
R25
+16V
2
4K7
1
-16V
2P-2.5
CN4
1
2
2P-2.5
C15
10uF/50V
D3
1N4148
C12
R15
R14
1 2
22R
100K
D5
1nF/50car
ZENER 6V2 1/2W
R17
6
U11B
R18
Q6
R10
4K7
R9
2K2
R4
15K
3
2
C9
R12
R11
1 2
22R
100K
1nF/50car
U11A
Q3
BC337
R2
0.33 10W
R3
6K2
Q1
MJL21194
NJM4580L
1
R7
4K7
Q5
BC547
7
2K2
5
4K7
BC557
D7
1N4148D81N4148
NJM4580L
Q8
R26
68R
G
+AC28V
C1
BD1
NTC 27R
GND
2200uF/50V
2
4
R1
1K1
C6
-AC28V
C2
2200uF/50V
8A
1
1uF/50V
GND
R27
OUT
G
OUT
IN
U7
R21
33K 1%
BC327
R24
R23
6K2
0.33 10W
Q10
MJL21193
LM317T
IN
+24V
3
-16V
CN1
123
C3
100nF/50car
3P-3.96
U11C
GND
C4
NJM4580L
100nF/50car
8 4
1 2
+16V
1 2 3 4 5 6 78
A
R37
15R 1/2W
Q2
MJE15032
Q4
BC547
R5
2K 1%
R6
+AC28V
D
1K2
+16V
C8
22uF/25V
D2
ZENER 16V1/2WD4ZENER 16V1/2W
C
-16V
C10
22uF/25V
R16
1K2
R19
2K 1%
R38
15R 1/2W
Q9
MJE15033
Q7
BC557
-AC28V
B
- 9 -
5. Wiring Diagram
D
4
CN2
AMP-OUT
black
white
black
white
C
CN2
CN1
B
A
POWER
white
CN4 CN3
MX30PFILTER
321
TE11 TE13
black
CN1
P-DJM3-VR
P-D300W P-D300W
TE11 TE13
black white
red
white
TE1 TE1
CN2CN3CN1
CN2 CN4
P-DJM4-PU
D
CN2CN1
P-MX30-PRE
CN3
C
B
P-DJM3-FP
1 2 34
A
-10 -
D
4
C
DC OUTPUT
B
1
2
3
A
Fan
1
2
PAN PWR
R26
321
1
2
PWR-LED
123
AC-IN
+24V
-24VGND
MX-30P-PWR
NTC
Loop Transformer
Power SW
AC~INPUT
230V or 115V
D
C
- 11 -
2A
FUSE socket
green and yellow wire
B
1 2 34
Lock on the chassis
A
6. PCB Layout
VER040410
PCB : MX30-PRE Bottom Layer
- 12 -
VER040410
PCB : MX30-PRE Bottom Solder Mask
- 13 -
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