Alto MP8D Service Manual
Service Manual
Model: MP8D
8 CHANNEL MIC PRE-AMPLIFIER
www.altoproaudio.com
Version: 1.1
CONTENT
1. Introduction……………………………………………………………………..1
2. Specification…………………………………………………………………....2
3. Block Diagram………………………………………………………………….3
4. Wiring Diagram………………………………………………………….........4
5. Schematic Diagram…………………………………………………………..5
6. PCB Layout……………………………………………………………………16
7. Exploded View & Mechanical Parts List…………………...……….32
8. BOM...........................................................………………………………...35
1. INTRODUCTION
- 1 -
˙ 2 channel Mic/Line Input jacks 6 channel Mic input capability.
˙ Serves as DI box.
˙ Individual Phantom power switch.
˙ 8 channel ADAT and with AES/EBU or S/PDIF output.
˙ Switch control with build-in light
˙ 8 channels for MIC only also include individual 48 volt phantom power
switch and high pass filter.
˙ includes 2 channels with Hi-Z input for line level instrument.
˙ TRS jack insert.
INPUT
2. Technical Specification
- 2 -
Connectors
Impedance
Max input level
CMRR
OUTPUT
Connectors
Impedance
Max output level
SYSTEM SPECIFICATIONS
Bandwidth
Frequency Response
Signa/Noise
THD
Crosstalk
Stereo Coupling
Digital
Six balanced XLR, Two 1/4"TRS Instrument Inputs and TWO
combo on Channel One and Tw
Balanced >50Kohm, Unbalanced>25Kohm
>+24dBu balanced and unbalanced
Typically>60dB at 1KHz
Eight 1/4" TRS (INSERT)
ADAT Light-Pipe Dight Optical
AES/EBU
Unbalanced>60ohm
>+21dBu unbalanced
20HZ to 20kHz, +0/-0.5dB
10Hz to 200kHz,+0/-3dB
>128dBu, weighted, 22Hz to 22kHz
<0.007%
<-100dB, 22Hz to 22Khz
True RMS detection
Sampling Rates
Output
44.1K,48K,44.1K x2,48K x2,44.1K x4,48K x4
24-bit
FUNCTION SWITCHES
48 Volt Phantom Power
High pass filter
Sample
Ext.clock
INDICATORS
INPUT LEVEL
Function switch
POWER SUPPLY
Mains Voltages
Fuse
Power consumption
Mains Connection
Eight channel of the MP8D has 48V Phantom power available.
>80Hz
Six sample rates
On/Off
3 element LED display: -20/0/CLIP dB.
LED indicator for each
USA/Canada
U.K./Australia
Europe
General Export Model
100-120VAC : 400mA (SLOW-BLOW)
200-240VAC : 200mA (SLOW-BLOW)
35 Watts
Standard IEC receptacle
~120VAC, 60Hz
~240VAC, 50Hz
~230VAC, 50Hz
~100-120VAC,
~200-240VAC, 50-60Hz
PHYSICAL
Dimension
Net Weight
W(483.0)*D(198.0)*H(44.2) mm
3.3Kg
D
- 3 -
3. Block Diagram
8
C
B
A
ADAT
DIGITAL OUT
WORD CLOCK
SAMPLE RATE
7654321
44.1K 48K *2 *4
EXT. CLO CK
OUT
IN
5
9
4
8
3
7
2
6
1
S/PDIF-AES/EBU
DIGITAL OUT
CH3-D-OUT
CH4-D-OUT
CH5-D-OUT
CH6-D-OUT
CH7-D-OUT
CH8-D-OUT
CH2-D-OUT
CH1-D-OUT
MP8D BLOCK DIAGRAM
GR YEL RED
(-20dB 0dB CLIP)
PHANTOM POWER 48V
CH1-D-OUT
CH1 INSERT
J1
3c5e1a
4d
HI-PASS SW
AMP
PHANTOM POWER 48V
+48V
X1X2X3
J1
JY6351G-02
3c5e1a
4d
2b
R
GR YEL RED
(-20dB 0dB CLIP)
80dB
HI-PASS
HI-PASS SW
AMP
6
2132211
GAIN LEVEL 0dB~60dB
HIGH INPUT
IMPEDANCE
33
+48V
12345
X1X2X3
CH2 INSERT
2b
R
12345
CH2-D-OUT
CH3-D-OUT
CH3 INSERT
J1
3c5e1a
4d
HI-PASS SW
AMP
PHANTOM POWER 48V
+48V
213
4
JY6351G-02
GR YEL RED
(-20dB 0dB CLIP)
80dB
HI-PASS
J1
3c5e1a
4d
JY6351G-02
2b
R
GR YEL RED
(-20dB 0dB CLIP)
80dB
HI-PASS
HI-PASS SW
GAIN LEVEL 0dB~60dB
AMP
PHANTOM POWER 48V
+48V
213
4
GAIN LEVEL 0dB~60dB
HIGH INPUT
IMPEDANCE
6
2132211
33
CH8-D-OUT
CH8 INSERT
JY6351G-02
2b
R
80dB
HI-PASS
LINE IN2
LINE IN1
MIC1 IN
D
INSTRUMENT IN1
MIC2 IN
INSTRUMENT IN2
C
MIC3 IN
B
MIC8 IN
A
1 2 3 4 5 6 7 8
- 4 -
4. Wiring Diagram
7654321
8
MP 8-DigitaloutV1
MP8-DigitaloutV2
CN2
D
CN7
CN1 CN2 CN3CN4 CN5CN6
CN7
CN5
D
CN3
AC Socket
MP 8INO U T
CN1
藍
紅
PGND
C
PT-MP8D
CN1
CN22
CN18
CN5 CN6
CN4
CN19 CN20 CN21
CN7 CN13
CN2
GND
CN17
MP 8-MAIN
CN16
CN3
CN11
黑
FUS E
白
黑
白
藍
黃
C
B
CN8 CN9 CN10 CN14
CN15 CN12
POWER SW
B
MP8-DISPLAY
A
1 2 3 4 5 6 78
A
7654321
- 5 -
5. Schematic Diagram
8
MP8-MAIN (1/5)
D
+VCC
CH1-D-OUT
CH2-D-OUT
CH3-D-OUT
CH4-D-OUT
CH5-D-OUT
CH6-D-OUT
CH7-D-OUT
CH8-D-OUT
INPUT CH1 - CH2
MP8-MAIN-02.Sch
INPUT CH3 - CH5
MP8-MAIN-03.Sch
INPUT CH6 - CH8
MP8-MAIN-04.Sch
LD1
YEL
LD2
YEL
LD3
YEL
LD4
YEL
LD5
YEL
LD6
YEL
LD7
YEL
LD8
YEL
D1
1N4148
D2
1N4148
R22
10K
CH2-IN-X1-1
CH2-IN-X2-1
CH2-IN-X3-1
CH2-IN-X1
CH2-IN-X2
CH2-IN-X3
CH1-IN-X1-1
CH1-IN-X2-1
CH1-IN-X3-1
CH1-IN-X1
CH1-IN-X2
CH1-IN-X3
CH5-IN-X1
CH5-IN-X2
CH5-IN-X3
CH4-IN-X1
CH4-IN-X2
CH4-IN-X3
CH3-IN-X1
CH3-IN-X2
CH3-IN-X3
CH8-IN-X1
CH8-IN-X2
CH8-IN-X3
CH7-IN-X1
CH7-IN-X2
CH7-IN-X3
CH6-IN-X2
CH6-IN-X2
CH6-IN-X3
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
CN1
CN-HD6X2
CN2
CN-HD5X2
CN3
CN-HD5X2
R13
680R 1/ 4W
BC327
TR1
BC327
CBE
SW1B
PBA/6PC
SW3B
C
PBA/6PC
SW5B
PBA/6PC
SW7B
PBA/6PC
SW9B
PBA/6PC
SW 11B
PBA/6PC
SW 13B
PBA/6PC
B
SW 15B
PBA/6PC
5
5
5
5
5
5
5
5
4
6
(CH1 HI-PASS led)
4
6
(CH2 HI-PASS led)
4
6
(CH3 HI-PASS led)
4
6
(CH4 HI-PASS led)
4
6
(CH5 HI-PASS led)
4
6
(CH6 HI-PASS led)
4
6
(CH7 HI-PASS led)
4
6
(CH8 HI-PASS led)
-VCC
CN4
1
2
3
4
5
6
7
8
9
10
CN-HD5X2
( TO Digita l Out Boar d )
D
C
B
1 2 3 4 5 6 78
POWER SUPPLY
MP8 MN-PWR.s ch
A
CH1-IN-X3
- 6 -
MIC1 IN
CH1-IN-X2
D
D78
1N 4148
CH1-IN-X3-1
LINE IN1
CH1-IN-X2-1
C
INSTRUMENT IN
J1
PHONEJACK
CH2-IN-X3
MIC2 IN
CH2-IN-X2
B
D82
1N 4148
CH2-IN-X3- 1
LINE IN2
CH2-IN-X2- 1
A
INSTRUMENT IN
J2
PHONEJACK
D79
1N 4148
+VCC-VCC
C2 66 47uF /25V
C2 67 47uF /25V
BC337
CBE
3
33
22
2
11
1
D83
1N 4148
+VCC-VC C
C273 47uF /25V
C274 47uF /25V
3
33
22
2
11
1
R33
47R0
R34
47R0
D80
1N 4148
R59
6K81
R36
47R0
R37
47R0
+VCC -VC C
CH1-48V
R57
6K81
D81
1N 4148
+VCC -VCC
R74
5K62
R73
5K62
R427
10K
R428
10K
100N
R429
5M1
CH2-48V
47uF / 63V
D86
1N 4148
R76
5K62
R75
5K62
R434
10K
C275
100N
R435
10K
C276
100N
R436
5M1
R58
6K81
330P
47uF/ 63V
C269
R60
6K81
C18
330P
C3
D87
1N 4148
47uF / 63V
C17
C1
C268
100N
C4
47uF / 63V
C2
TR51
BC33 7
R437
5M1
RY12W-K
D48
1N4148
TR50
BC33 7
R430
5M 1
RL2
RY12W-K
D51
1N4 148
1N4148
R438
1K
C277
RL1
D49
1N4148
R431
1K
D52
33P
7654321
+VCC
R117
C19
2K49
10N
3906
R93
20K0
C27
1N
2K49
R122
-VCC
TR26
R173
475R
TR10
R78
1K50
2SA970
12
34
56
78
-VCC
R77
1K50
C20
10N
R174
475R
C28
1N
+VCC
-VCC
R123
2K49
R118
2K49
TR27
TR11
1000uF/10V
3906
2SA970
C31
+VCC
VR1
02C 10K
R35
4R7 0
R119
2K49
+VCC
R120
2K49
D35
BAS316
-VCC
R121
2K49
U1A
4580M
3906
TR28
3
2
C40
R193
22P
5K11
4580M
5
6
C41
22P
R196
5K11
U1B
1
7
22P
R194
5K11
R225
10K0
R226
10K0
0.22u F / 50V
C42
C48
R241
1K3
R277
62K
3
2
U2A
4580M
C43
22P
5K11
C49
0.22u F / 50V
6
5
R195
1
U2B
4580M
C72
47uF / 25V
R94
20K
C50
0.22u F / 50V
R249
6K8
C73
47uF / 25V
7
R95
20K
HI-PASS
1
3
SW1A
PBA/6PC
2
CH1-48V
CH2-48V
C74
47uF/25V
CH1-INS
CH1-RTN
CH1-D-OUT
CN5
1
2
3
4
5
6
6P-2. 5
(TO DISPLAY BOARD)
MP8-MAIN (2/5)
CN18
1
2
3
4
5
6
6P-2. 5
(CH1 & CH2 INSERT)
8
D
A970
LINE IN GAIN=-40~+10dB
MIC GAIN=-60~0dB
RYPWR
D50
1N4148
+VCC-VC C
U17A
2
3
4580M
C270
33P
12
34
56
78
D53
1N4 148
+VCC-VC C
U17B
6
5
4580M
RYPWR
7
1
R79
1K50
C278
47uF/25V
C271
47uF / 25V
-VCC
C23
10N
R96
20K0
C29
1N
R124
2K49
R439
20K
R432
20K
+VCC
-VCC
RYPWR +VCC
C272
47uF/ 25V
R125
C24
2K49
10N
3906
TR29
R177
R178
475R
475R
TR12
2SA970
R80
1K50
C30
1N
+VCC
-VCC
R433
680R 1/4 W
R127
2K49
3906
TR30
TR13
2SA970
R126
2K49
+VCC
C32
1000uF/10V
VR2
02C 10K
R38
4R7 0
2K49
CBE
R128
+VCC
D36
BAS316
-VCC
MIC GAIN=-60~0dB
LI N E IN GAIN =- 4 0 ~ +1 0 dB
R129
2K49
R130
2K49
C
R242
1K3
R278
62K
3
2
U4A
4580M
C47
22P
5K11
C52
0.22u F / 50V
6
5
R200
1
U4B
4580M
C75
47uF / 25V
R97
20K
C53
0.22u F / 50V
R250
6K8
C76
47uF / 25V
7
R98
20K
HI-PASS
1
3
SW3A
PBA/6PC
2
C77
47uF/25V
CH2-INS
CH2-RTN
CH2-D-OUT
+VCC
-VC C
U1C
4580M
B
C112
84
100N
C113
100N
U2C
4580M
84
C114
100N
C115
100N
U3C
4580M
84
C116
84
100N
U4C
4580M
C117
100N
l
C118
100N
C119
100N
U17C
4580M
84
C279
100N
C280
100N
A
C46
22P
U3A
4580M
3906
TR31
3
2
C44
22P
5
6
R197
5K11
C45
22P
R198
5K11
4580M
U3B
1
7
R199
5K11
R227
10K0
R228
10K0
0.22u F / 50V
C51
1 2 3 4 5 6 78
7654321
- 7 -
8
CH3-48V
R61
R39
47R0
R40
47R0
6K81
D
CH3-IN-X3
MIC3 IN
CH3-IN-X2
R62
6K81
C144
330P
C5
47uF/63V
C6
47uF/63V
MIC GAIN=-60~0dB
D55
D54
1N 4148
1N 4148
+VCC -VCC
D57
1N4148
CH4-48V +VCC +VCC +VCC+VCC
C
CH4-IN-X3
MIC4 IN
CH4-IN-X2
R42
47R0
R43
47R0
6K81
R63
+VCC-VC C
R81
1K5 0
D56
1N4148
R64
6K81
47uF/63V
C145
330P
C7
47uF/63V
C8
MIC GAIN=-60~0dB
D59
D58
1N 4148
1N 4148
+VCC -VCC
D60
1N4148
B
CH5-48V
R65
6K81
CH5-IN-X3
MIC5 IN
CH5-IN-X2
R44
47R0
R46
47R0
+VCC-VC C
R83
1K5 0
D61
1N4148
R66
6K81
47uF/63V
C146
330P
C10
47uF/63V
C9
MIC GAIN=-60~0dB
D89
D88
1N 4148
1N 4148
+VCC -VCC
A
D64
1N4148
R85
1K5 0
D65
1N4148
+VCC-VC C
-VCC
-VCC
-VCC
C150
10N
R99
20K 0
C186
1N
2K4 9
C152
10N
R101
20K 0
C188
1N
2K4 9
C154
10N
R104
20K 0
C190
1N
2K4 9
R135
R142
R149
+VCC
-VCC
-VCC
+VCC
-VCC
R131
2K49
TR32
R181
475R
TR14
R82
1K50
R136
2K49
TR35
R183
475R
TR16
R84
1K50
R143
2K49
TR38
R185
475R
TR18
R86
1K50
3906
3906
3906
2SA970
2SA970
2SA970
C151
10N
475R
C153
10N
475R
C155
10N
475R
R182
C187
1N
R184
C189
1N
R186
C191
1N
+VCC
-VCC
-VCC
+VCC
-VCC
R137
2K49
R144
2K49
R150
2K49
R132
2K4 9
TR33
TR15
R138
2K4 9
TR36
TR17
R145
2K4 9
TR39
TR19
1000uF/10 V
3906
2SA970
1000uF/10 V
3906
2SA970
1000uF/10 V
3906
2SA970
C34
C35
C36
+VCC
VR3
02C10K
R41
4R70
VR4
02C10K
R45
4R70
+VCC
VR5
02C10K
R47
4R70
R133
2K4 9
R139
2K4 9
R146
2K4 9
+VCC
R134
2K4 9
D37
BAS316
-VCC
D38
BAS316
-VCC
+VCC
D39
BAS316
-VCC
TR34
R140
2K4 9
R141
2K4 9
TR37
R147
2K4 9
R148
2K4 9
TR40
R151
2K4 9
3906
3906
U5A
4580M
3
2
C162
R201
22P
5K1 1
4580M
5
6
C166
22P
R204
5K1 1
U7A
4580M
3
2
C165
R205
22P
5K1 1
4580M
5
6
C169
22P
R208
5K1 1
U9A
4580M
3906
3
2
C172
R212
22P
5K1 1
4580M
5
6
C173
22P
R211
5K1 1
U5B
U7B
U9B
1
7
1
7
1
7
22P
R202
5K1 1
R229
10K 0
R230
10K 0
0.22uF/50V
22P
R206
5K1 1
R231
10K 0
R233
10K 0
0.22uF/50V
22P
R209
5K1 1
R232
10K 0
R234
10K 0
0.22uF/50V
C163
C56
C167
C58
C170
C60
R243
1K3
R279
62K
R244
1K3
R280
62K
R245
1K3
R281
62K
3
2
3
2
3
2
U6A
4580M
C164
22P
5K11
C54
0.22u F/50V
6
5
U8A
4580M
C168
22P
5K11
C59
0.22u F/50V
6
5
U10A
4580M
C171
22P
5K11
C61
0.22u F/50V
6
5
R203
R207
R210
1
U6B
4580M
1
U8B
4580M
1
U10B
4580M
C78
47uF/25V
R100
20K
C55
0.22uF/50V
R251
6K8
C79
47uF/25V
7
C81
47uF/25V
R102
20K
C57
0.22uF/50V
R252
6K8
C84
47uF/25V
7
C83
47uF/25V
R105
20K
C62
0.22uF/50V
R253
6K8
C85
47uF/25V
7
R103
20K
R106
20K
R107
20K
HI-PASS
1
3
SW5A
PBA/6PC
HI-PASS
1
3
SW7A
PBA/6PC
HI-PASS
1
3
SW9A
PBA/6PC
2
2
2
CH3-48V
CH4-48V
CH5-48V
CH6-INS
CH6-48V
C80
47uF/25V
C82
47uF/25V
C86
47uF/25V
CH3-INS
CH3-RTN
CH3-D-OUT
CN6
1
2
3
4
5
6
6P-2.5
(TO DISPLAY BOARD)
CH4-INS
CH4-RTN
CH4-D-OUT
CH5-INS
CH5-RTN
CH5-D-OUT
CN7
1
2
3
4
5
6
6P-2.5
(TO DISPLAY BOARD)
+VCC
-VCC
CH6-INS
CH6-RTN
U5C
4580M
84
CN19
1
2
3
4
5
6
6P-2.5
(CH3 & CH4 INSERT)
CN20
1
2
3
4
5
6
6P-2.5
(CH5 & CH6 INSERT)
MP8-MAIN (3/5)
C120
100N
C121
100N
U6C
4580M
C122
84
+VCC
-VCC
100N
C123
100N
U7C
4580M
U9C
4580M
84
84
C124
100N
C125
100N
C126
100N
C130
100N
U8C
4580M
U10C
4580M
84
84
C127
100N
C128
100N
C129
100N
C131
100N
D
C
B
A
l :
1 2 3 4 5 6 78
:
7654321
- 8 -
8
D
C
MIC6 IN
MIC GAIN=-60~0dB
LINE IN GAIN=-40~+10dB
MIC7 IN
CH6-IN-X3
CH6-IN-X2
CH7-IN-X3
CH7-IN-X2
R67
6K81
R48
47R0
R49
47R0
D66
1N 4148
+VCC -VCC
R69
6K81
R51
47R0
R52
47R0
D70
1N 4148
+VCC -VCC
CH6-48V
R68
6K81
C12
47uF/63V
C147
330P
C11
47uF/63V
D67
1N 4148
R87
D71
1N 4148
+VCC-VCC
+VCC-VCC
1K5 0
D69
1N 4148
R70
6K81
C148
330P
C13
47uF/63V
R89
1K5 0
D73
1N 4148
C14
47uF/63V
D68
1N 4148
CH7-48V +VCC +VCC +VCC+VCC
D72
1N 4148
-VCC
-VCC
C156
10N
R108
20K 0
C192
1N
R156
2K4 9
C158
10N
R110
20K 0
C194
1N
R163
2K4 9
+VCC
-VCC
-VCC
R152
2K4 9
TR41
R187
475R
TR20
R88
1K50
R157
2K4 9
TR44
R189
475R
TR22
R90
1K50
3906
2SA970
3906
2SA970
C157
10N
R188
475R
C159
10N
R190
475R
C193
1N
C195
1N
+VCC
-VCC
-VCC
R158
2K49
R165
2K49
R153
2K4 9
TR42
TR21
R159
2K4 9
TR45
TR23
1000uF/10V
3906
2SA970
1000uF/10V
3906
2SA970
C37
C38
+VCC
VR6
02C10K
R50
4R70
VR7
02C10K
R55
4R70
R154
2K4 9
R160
2K4 9
+VCC
R155
2K49
D40
BAS316
-VCC
D41
BAS316
-VCC
TR43
R161
2K49
R162
2K49
TR46
R168
2K49
3906
3906
3
2
5
6
3
2
5
6
C174
22P
C177
22P
U11A
4580M
U13A
4580M
R216
5K11
R220
5K11
R213
5K1 1
C178
22P
R217
5K1 1
C182
22P
4580M
4580M
U11B
U13B
1
7
1
7
C175
22P
R214
5K11
R235
10K 0
R236
10K 0
0.22uF/50V
C179
22P
R218
5K11
R237
10K 0
R239
10K 0
0.22uF/50V
C65
C68
R246
1K3
R282
62K
R247
1K3
R283
62K
3
2
3
2
U12A
4580M
C176
22P
R215
5K1 1
C63
0.22uF/50V
6
5
U14A
4580M
C180
22P
R219
5K1 1
C66
0.22uF/50V
6
5
1
U12B
4580M
1
U14B
4580M
C87
47uF/25V
R109
20K
C64
0.22uF/50V
R254
6K8
C88
47uF/25V
7
C90
47uF/25V
R111
20K
C67
0.22uF/50V
R255
6K8
C93
47uF/25V
7
R112
20K
R115
20K
HI-PASS
1
3
SW11A
PBA/6PC
HI-PASS
1
3
SW13A
PS-22E85L
2
C89
CH6-INS
CH6-RTN
CH6-D-O UT
47uF/25V
+VCC
-VCC
2
C91
CH7-INS
CH7-RTN
CH7-D-O UT
47uF/25V
84
U11C
4580M
CN21
1
2
3
4
5
6
6P-2.5
(CH7 & CH8 IN SERT)
MP8-MAIN (4/5)
LD46 YEL
CN11
1
2
3
4
4P-2.5
FROM DISP BOARD
1
2
3
4
6
+VCC
SW17
SW SPST-0204
C134
100N
C135
100N
-VCC
U13C
4580M
U15C
4580M
C136
84
84
100N
C137
100N
C138
100N
C142
100N
U14C
4580M
U16C
4580M
84
84
5
(EXT. CLOCK SW)
C132
84
100N
U12C
4580M
C133
100N
C139
100N
C140
100N
C141
100N
C143
100N
D
C
B
A
MIC8 IN
CH8-48V
R71
6K81
CH8-IN-X3
CH8-IN-X2
1 2 3 4 5 6 78
R53
47R0
R54
47R0
D74
1N 4148
+VCC -VCC
D76
1N4148
D75
1N 4148
1N4148
R72
6K81
C16
47uF/63V
C149
330P
C15
47uF/63V
R91
D77
1K5 0
+VCC-VCC
-VCC
C160
10N
R113
20K 0
C196
1N
R170
2K4 9
+VCC
-VCC
R164
2K4 9
TR47
R191
475R
TR24
R92
1K50
3906
2SA970
C161
10N
R192
475R
C197
1N
+VCC
-VCC
R166
2K4 9
R171
2K49
TR48
TR25
1000uF/10V
3906
2SA970
C39
+VCC
VR8
02C10K
R56
4R70
R167
2K4 9
+VCC
R169
2K49
D42
BAS316
-VCC
TR49
R172
2K49
U15A
4580M
3
3906
2
C181
R221
22P
5K1 1
4580M
5
6
C185
22P
R224
5K11
U15B
1
7
C183
22P
R222
5K11
R238
10K 0
R240
10K 0
0.22uF/50V
C69
R248
1K3
R284
62K
3
2
U16A
4580M
C184
22P
R223
5K1 1
C70
0.22uF/50V
6
5
1
U16B
4580M
C92
47uF/25V
R114
20K
C71
0.22uF/50V
R256
6K8
C94
47uF/25V
7
R116
20K
HI-PASS
1
3
SW15A
PS-22E85L
2
CH7-48V
CH8-48V
C95
47uF/25V
CH7-INS
+48V
+V-LE D
LGND
-V- LED
CH8-INS
CH8-RTN
CH8-D-O UT
CN13
1
2
3
4
5
6
7
8
9
10
10P-2.5
(TO DISPLAY BOARD)
l
B
A
321
- 9 -
4
MP2-MN-PW R(1/1)
D
R2
220R
+VCC
R17
220R
C16
47u/100V
C8
10uF/50V
U4
LM317T
+V-LED
-V-LED
R18
8K2
+VCC
-VCC
+48V
LGND
C4
100N
D12
RLS4148
R19
220R
U16
LM337T
C17
47u/63V
CN3
1
2
3
4
5
6
7
CN2.5-7P -18 0
R11
2K7
U15
D10
2A W2-08
+V
C3
100N
-V
PGND
PGND LGND
GND DGND
D9
C1
100N
C
CN1
5
B
A
4
3
2
1
CN3.9-5P -1 8 0
POWER
SUP PLY
CONNECTOR
2A W2-08
100uF/100V
C11
100N
PGND
C102
C12
100uF/100V
C13
100N
D11
2A W2-08
DGND
C20
1000uF/35V
PGND
VCC1
C2
2200uF/25V
R1
0R0
C7
2200uF/25V
R7
220R1/2W
R8
220R1/2W
C14
220uF/100V
R16
0R0
R151
0R0
R9
180K
LM317T
C15
100N
R10
2K7
R3
220R
R12
470R 1/4W
C18
100N
-VCC-V
C9
10uF/50V
+48V
C19
470uF/50V
C5
100N
DGND
+VCC
-VCC
+5V
DGND
[ TO DIGI-OUT B O A RD ]
U17
LM317T
R13
0R0
R14
0R0
R15
680R
CN2
1
2
2P-2.5
R5
220R
+V-LED
-V-LED
+5VVCC1
C10
1000uF/16V
D
C
B
A
1 2 34
321
- 10 -
J9
J10
X1
X3
X2
1
2
3
4
5
6
X1
X3
X2
1
2
3
4
5
6
4
2
3
1
D
CH1 INPUT
C
CH2 INPUT
J11
CH3 INPUT
CH1-IN-X1
CH1-IN-X3
CH1-IN-X2
CH1-IN-X2-1
CH1-IN-X3-1
CH1-IN-X1-1
CH2-IN-X1
CH2-IN-X3
CH2-IN-X2
CH2-IN-X2-1
CH2-IN-X3-1
CH2-IN-X1-1
CH3-IN-X2
CH3-IN-X3
CH3-IN-X1
JY5042-030G
B
J12
CH4 INPUT
4
2
3
1
CH4-IN-X2
CH4-IN-X3
CH4-IN-X1
JY5042-030G
MP8D-INOUT(1 /2)
J13
CH5 INPUT
JY5042-030 G
J14
CH6 INPUT
JY5042-030 G
J15
CH7 INPUT
JY5042-030 G
J16
CH8 INPUT
JY5042-030 G
4
2
3
1
4
2
3
1
4
2
3
1
4
2
3
1
MP8 OUTPUT SECTION
MP8-INOUT-02. Sch
CH5-IN-X2
CH5-IN-X3
CH5-IN-X1
CH6-IN-X2
CH6-IN-X3
CH6-IN-X1
CH7-IN-X2
CH7-IN-X3
CH7-IN-X1
CH8-IN-X2
CH8-IN-X3
CH8-IN-X1
CH2-IN-X1-1
CH2-IN-X2-1
CH2-IN-X3-1
CH2-IN-X1
CH2-IN-X2
CH2-IN-X3
CH1-IN-X1-1
CH1-IN-X2-1
CH1-IN-X3-1
CH1-IN-X1
CH1-IN-X2
CH1-IN-X3
CH5-IN-X1
CH5-IN-X2
CH5-IN-X3
CH4-IN-X1
CH4-IN-X2
CH4-IN-X3
CH3-IN-X1
CH3-IN-X2
CH3-IN-X3
CH8-IN-X1
CH8-IN-X2
CH8-IN-X3
CH7-IN-X1
CH7-IN-X2
CH7-IN-X3
CH6-IN-X1
CH6-IN-X2
CH6-IN-X3
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
CN1
CN-HD6X2
CN2
CN-HD5X2
CN3
CN-HD5X2
4
D
C
B
A
A
l
1 2 34
321
- 11 -
4
MP8D-INOUT(2 /2)
D
CN4
1
2
3
4
5
6
CON6
C
CN6
1
CON6
2
3
4
5
6
B
A
CH1-INS
CH1-RTN
CH3-INS
CH3-RTN
CH2-INS
CH2-RTN
CH4-INS
CH4-RTN
R1
120R
R3
120R
R5
120R
R6
120R
CH1 INSERT
J1
1a
2b
4d
3c
5e
JY6351G-02
CH2 INSERT
J2
1a
2b
4d
3c
5e
JY6351G-02
CH3 INSERT
J3
1a
2b
4d
3c
5e
JY6351G-02
CH4 INSERT
J4
1a
2b
4d
3c
5e
JY6351G-02
CN5
1
2
3
4
5
6
CON6
CN7
1
2
3
4
5
6
CON6
CH5-INS
CH5-RTN
CH7-INS
CH7-RTN
CH6-INS
CH6-RTN
CH8-INS
CH8-RTN
R4
120R
R7
120R
R8
120R
R2
120R
CH5 INSERT
J5
1a
2b
4d
3c
5e
JY6351G-02
CH6 INSERT
J6
1a
2b
4d
3c
5e
JY6351G-02
CH7 INSERT
J7
1a
2b
4d
3c
5e
JY6351G-02
CH8 INSERT
J8
1a
2b
4d
3c
5e
JY6351G-02
D
C
B
A
l
1 2 34
+V-LED-d
- 12 -
+V-LED-d
+V-LED-d
7654321
8
MP8-DISPLAY (1/2)
+V-LED-d
D3
680R 1/4W
LGND -d
LD 10
YEL
LD 11
GR
(-20dB)
LD 12
YEL
(0dB)
LD 13
RED
(CLIP)
GND-d
GND-d
+48V-d
4148
D4
4148
R23
10 K
LGND -d
R448
100K
C284
100uF/50V
+V-IC
-V-IC
R310
110R
R286
100R
R294
200R
R302
402R 1%
+V-LED-d
R318
36K
R396
100K
PH ANTO M2 SW
5
SW 4 B
PBA/6PC
84
U20C
4580 M
PH ANTO M SW & LED
LGND -d
2
3
LGND -d
CH2-METER
CH2-48V-d
GND-d
4
6
84
U23C
4580 M
SW 4 A
PBA/6PC
2
11
10
9
8
7
6
R326
10 0K
D13
4148
GND-d
+48V-d
C218
47uF /25V
R349
10K
U20A
4580 M
U21E
LM 339
BC 327
U22D
LM 339
U22C
LM 339
U22B
LM 339
LGND -d
1
CN8
1
2
3
4
5
6
6P -2.5
312
TR3
13
14
1
3
1
D14
4148
LGND-d
312
U22E
LM 339
R15
R357
22R 1/4W
D
TR2
BC 327
R14
PH ANTO M SW & LED
SW 2 A
PBA/6PC
2
LGND -d
R309
110R
R285
100R
R293
C
200R
R301
402R 1%
+V-LED-d
11
10
9
8
7
6
C217
47uF /25V
R325
100K
+48V-d
TR52
BC337
R317
36K
R395
10 0K
LGND-d
B
C281
R443
100uF/50V
100R
A
GND-d
R444
10K
6
5
LGND-d
CH1-METER
CH1-48V-d
GND-d
C283
100uF/50V
GND-d
GND-d
4580 M
D11
4148
R445
100K
C282
100uF/50V
R29
10 K
U20B
R446
100R
1
3
U21D
LM 339
13
U21C
LM 339
14
U21B
LM 339
1
LGND -d
7
+48V-d
TR53
BC337
PH ANTO M1 SW
5
SW 2 B
PBA/6PC
LGND -d
D12
4148
R356
22R 1/4W
R447
10K
4
6
680R 1/4W
LGND -d
LD 14
YEL
LD 15
GR
(-20dB)
LD 16
YEL
(0dB)
LD 17
RED
(CLIP)
U24E
LM 339
D5
4148
D6
4148
TR4
BC 327
R24
10K
R311
110R
R287
100R
R295
200R
R303
402R 1%
LGND -d
+V-LED-d
PH ANTO M SW & LED
SW 6 A
PBA/6PC
2
U24D
11
LM 339
10
9
8
7
6
C219
47 uF/25V
R350
U24C
LM 339
U24B
LM 339
13
14
10 K
LGND -d
1
3
1
LGND -d
R16
R358
22R 1/4W
R327
100K
U25E
LM 339
GND-d
312
R319
36K
C285
100uF/50V
LGND-d
312
R397
10 0K
6
5
LGND-d
CH3-M ETER
CH3-48V-d
GND-d
+48V-d
R449
100R
D15
4148
TR54
BC337
C225
104P
U23B
4580 M
R450
10K
R30
22R 1/4W
R364
22R 1/4W
D16
4148
7
R451
100K
C286
100uF/50V
GND-d
+V-LED-d
-V-LED-d
680R 1/4W
LGND -d
LD 18
YEL
LD 19
GR
(-20dB)
LD 20
YEL
(0dB)
LD 21
RED
(CLIP)
D7
4148
D8
4148
R25
10K
LGND -d
PH ANTO M3 SW
5
SW 6 B
PBA/6PC
R320
36K
4
6
R312
110R
R288
100 R
R296
200R
R304
402R 1%
R398
100K
LGND -d
+V-LED-d
GND-d
+48V-d
PH ANTO M SW & LED
SW 8 A
PBA/6PC
R328
10 0K
2
3
LGND -d
4148
CH4-METER
CH4-48V-d
GND-d
2
11
10
9
8
7
6
C220
47uF /25V
D17
R351
10K
U23A
45 80 M
GND-d
TR5
BC 327
1
3
U25D
LM 339
13
U25C
LM 339
14
U25B
LM 339
1
LGND -d
1
CN9
1
2
3
4
5
6
6P -2.5
C287
100uF/50V
LGND-d
D18
4148
R452
100R
R17
R359
22R 1/4W
+48V-d
680R 1/4W
LGND -d
LD 22
YEL
LD 23
GR
(-20dB)
LD 24
YEL
(0dB)
LD 25
RED
(CLIP)
TR55
BC337
l
D9
4148
D10
4148
R453
10K
D
R26
10K
C
MP8 MAIN CH5 -8 DISPLAY
MP8MN-DI SP-02. Sch
B
PH ANTO M4 SW
GND-d
R454
100K
C288
100uF/50V
5
SW 8 B
PBA/6PC
4
GND-d
6
+48V-d
A
1 2 3 4 5 6 78
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