Alto MAC 2.2 Service Manual

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87654321
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Title
Number RevisionSize
D
Date: 17-Sep-2004 Sheet of
File: D:\MAC \4-MAC PCB .ddb Drawn By:
5
6
7
84
U101-B
NE5532
3
2
1
U101-A
NE5532
R100 10K
R105 10K
R103
10K
R101 10K
R102
1K
R111
820
R115
820
R106 10K
R109
100
R107
39K
R108
7.5K
R104
150K
R113
270
R114
4.7K
R138
4.7K
R127
100
R110
100
C101
1000P
C106
10UF
C103
180P
C108
0.15
C107
0.22U
C119
0.022U
C125
100P
C110
27P
C115
0.0022U
C116
0.022U
C109
0.15
C105
100UF
Q100
HMBT5401
D101
15V 1N4744
D100
15V 1N4744
D102 D105
D103
1N4148*4
D106
R132
820
R130
820
R128
10K
R153
0.2-5W
R143
0.2-5W
R136
22-1W
R142
0.2-5W
R159
0.2-5W
R152
0.2-5W
R156
0.2-5W
R149
0.2-5W
R129
1.5K
R125
47K
R148
0.2-5W
R122
23.2K-1/2W
R118
8.2K-5W
-15V_A
+15V_A
D108
1N4937
D111
1N4148
D109
1N4937
D104
1N4148
D112
1N4148
D118
1N4004
D115
1N4148
D117
1N4004
D116
1N4148
D114
1N4148
D113
1N4148
R131
100
D110
5.6V-1/2W
R134
90
R140
3.3K
R139
3.3K
D107
5.6V-1/2W
Q101
HMBT222A
Q102
HMBT222A
Q110
2SC5200
Q104
2SC5200
Q108
2SC5200
Q112
2SC5200
Q103
2SA1943
Q107
2SA1943
Q109
2SA1943
Q111
2SA1943
Q106
15033
Q105
15032
R146
3.3-1W
R147
3.3-1W
R116
820K
R198
2.2K-3W
R158
2.2K-3W
+55V_A
SP_B
R160
5.6-2W
L101
2UH
R161
12-3W
R162
12-3W
C124
0.068-250V
E200
E201 JP16
JP15
1+
1-
2+
2-
SPEAKON
J203+
J203-
BR_POS
BR_NEG
PSA31500(MAC2.4) Schematic Diagram 1 of 4
CHANNEL-A
Channel-A
R137
22-1W
C114
0.0015U
R124
75
+IN B
-IN B
F-30-BF-SND-B
F-BYP-B
-14V
+14V
TO LED1(CLIP A)
TO LED2(SIG A)
R167
464K
R126
1K
R22B
68K
R23B
68K
R24
3.01K
3
2
4
5
1
7
8
116
U2A
LM13700
PSA-3000
^R_0805
^R_0805
^R_0805
^C_0805
^R_0805
BR-RET
^R_0805
^C_0805
BR-CUT
^R_0805
^R_0805
CLIP-B
^R_1206
^R_0805
^R_0805
^R_0805
^R_0805
^R_0805
^R_1206
^R_0805
^R_0805
^R_1206
^R_0805
^R_1206
^R_0805
^R_0805
^C_1206
^R_0805
^R_1206
^C_1206
^R_1206
^R_1206
^R_1206
^R_0805
1
3
5
7
9
11
13
15
17
19
21
23
25
2
4
6
8
10
12
14
16
18
20
22
24
26
CN104
R117
24K
R121
24K
^R_0805 ^R_0805
R20
3.3-1W
A1 A1
A1
A1
A1
A1
P1
P1
P1
P1
P1
P1
P1
P1
P1
DingNianCong
1 4
PSA31500-A
E100
E101
E112
E116
E117
C121
12000-80V
C120
12000-80V
C122
12000-80V
C123
12000-80V
C170
56P-50V
C172
0.0033
R178
150K
R179
4.7K
R173
150K
R174
4.7K
R171
5.9K
R177
12K-1W
R190
2K
R172
470K
R176
12K
R170
47
R175
3.01K
R180
5.1K-3W
D174
10V-1N4740
D170
5.6V
GND
1
2
3
BAL/STR
6
7
V+
8
V-
4
BAL
5
+
_
U170
^LM311-SMT
D171
1N4148
Q171
3904
Q172
3906
D173
1N4148
Q170
P55NE
C177
56P-50V
C179
0.0033
R192
150K
R193
4.7K
R186
150K
R187
4.7K
R184
5.9K
R194
12K-1W
R195
2K
R185
470K
R188
5.1K-3W
R189
47
R191
2.2K
GND
1
2
3
BAL/STR
6
7
V+
8
V-
4
BAL
5
+
_
U171
^LM311-SMT
D177
1N4148
Q173
3904
Q175
3906
Q174
P55NE
R183
47K
C176
47P-50V
R133
8.2K-3W
R135
8.2K-3W
-110V_A
R120
390
R123
23.2K-1/2W
R166
464K
C111
33P-200V
+110_A
D175
MUR1520
R181
1.5-2W
C31
0.1-250V
R157
2.2K 3W
C181
0.001
R119
8.2K-5W
+110_A
FUSE
25A-25V
D176
MUR1520
R182
1.5-2W
C175
0.1-250V
-55V_A
-110V-A
R22A
68K
R23A
68K
BR_BAL
R154
12-3W
R155
12-3W
P1
C126
0.068-250V
R165
15K-2W
R163
10-1/4W
R164
100-1/4W
C129
22-25NP
D119
2N5064
D120
2N5064
Q113
MAC224
P1
E112
E113
E115
BR_BAL
TO CN104 15PIN
C178
0.022-50V
R196
270
C131
0.001
C104
0.001-50V
CT_A
CN102:5
C130
100P-50V
R197
100
C132
56P
A1
CN102:6
CN102:7
CN102:2
CN102:1
CN102:4
CN102:3
CN1:1
CN1:2
CN1:3
CN1:4
CN1:5
CN1:6
CN1:7
TO VR1(VOL)
^C_1206
^C_0805
^R_0805
^C_1206
^D_SOT-23
^R_0805
^R_0805
^R_0805
^R_0805
^R_0805
^R_0805
^R_0805
^R_0805
^R_1206
^R_1206
^C_0805
^D_SOT-23
^Q_BJTP_SOT-23
^Q_BJTP_SOT-22
^Q_BJTN_SOT-21
^Q_BJTN_SOT-20
^R_0805
^R_1206
^R_0805
^R_1206
^R_0805
^R_0805
^R_0805
^R_0805
^R_0805
^C_1206
^R_0805
^C_0805
^R_0805
^D_SOT-23
^D_SOT-23
^D_SOT-23
^R_1206
^R_1206
^R_1206
D178
12V-1W-1N4742A
be modify
be modify
C173
100-25V
C180
100-25V
C112
220-25V
C113
220-25V
FILT-SEND A
FILT-BYP A
FILT-CAP A
SW TO GND FOR CLIP LIM
BR MONO FEED
C171
4.7-50V
^R_1206
10

Alto MAC 2.2 Specifications

General

Type	Power Amplifier
Number of Channels	2
Frequency Response	20Hz - 20kHz (±0.5dB)
THD	<0.1%
Input Sensitivity	1.4V
Dimensions	19" x 3.5" x 12.5" (483mm x 89mm x 318mm)
Weight	22 lbs (10 kg)
Input Impedance	20kΩ balanced, 10kΩ unbalanced
Connectors (Inputs)	XLR, 1/4" TRS
Connectors (Outputs)	Binding Post and Speakon

Summary

Introduction

Specification

Block Diagram

Schematic Diagram

Wiring Diagram

PCB Layout

CHA-PU-4 PCB Layout

Top, bottom, and overlay views of the CHA-PU-4 PCB.

MAC2.2-VR PCB Layout

Top layer and overlay views of the MAC2.2-VR PCB.

Test Procedure and Test Result

Stereo Mode Test

Details tests for stereo mode operation and performance.

Parallel Mode Test

Covers testing procedures for parallel mode connection.

Bridged Mode Test

Outlines tests for bridged mode operation and output.

Exploded Views & Mechanical Parts List

Exploded Views

Illustrates the mechanical assembly of the device for different models.

Mechanical Parts List

Lists all component parts for MAC2.2, MAC2.3, and MAC2.4 models.

BOM