Alesis M1 Active 520, M1 Active 620 Service Manual
ALESIS
M1Active 520/620
(AS6/7)
Service Manual
P/N: 8-31-0171-A
The information in this document contains privileged and confidential information.
It is intended only for the use of those authorized by Alesis. If you are not the
authorized, intended recipient, you are hereby notified that any review,
dissemination, distribution or duplication of this document is strictly prohibited. If
you are not authorized, please contact Alesis and destroy all copies of this
document. You may contact Alesis at servicemanuals@alesis.com or at
support@alesis.com.
Copyright Alesis, LLC
THIS DOCUMENT CONTAINS SENSITIVE
PROPRIETARY INFORMATION.
ALL RECIPIENTS MUST HAVE A CURRENT
NON-DISCLOSURE AGREEMENT ON FILE
COPIES OF THIS DOCUMENT
ATTENTION!
WITH ALESIS, LLC.
DO NOT MAKE ILLEGAL
Confidential Alesis Service Manual 8-31-0171-A
Preface
This document is intended to assist the service technician in the operation,
maintenance and repair of the Alesis device. Together with the User Reference
Manual, this document provides a complete description of the functionality and
serviceability of the Device. Any comments or suggestions you may have
pertaining to the document are welcome and encouraged.
READ THIS!
In addition to any purchase price that Alesis may charge as consideration for Alesis selling or
otherwise transferring this service manual (“Manual”) to you, if you are not a service and repair
facility (“Service Center”) authorized by Alesis in writing to be an authorized Service Center,
Alesis sells or transfers the Manual to you on the following terms and conditions:
Only Service Centers authorized by Alesis in writing are authorized to perform service and repairs
covered by an Alesis warranty (if any), and transfer of the Manual to you does not authorize you
to be an authorized Service Center. Therefore, if you perform, or if the Manual is used to
perform, any service or repairs on any Alesis product or part thereof, any and all
warranties of Alesis as to that product and any service contract with Alesis for that
product shall be voided and shall no longer apply for such product, even if your services
or repairs were done in accordance with the Manual.
All service or repairs done by you or with reference to the Manual shall be solely your
responsibility, and Alesis shall have no liability for any such repairs or service work. All such
service or repairs are performed at the sole risk of the person performing the service or
repairs. You agree that all such work will be performed in a competent, professional and safe
manner at all times and to indemnify and fully hold Alesis and its successors and assigns
harmless in the event of any failure to so perform.
Your purchase of the Manual shall be for your own ultimate use and shall not be for purposes of
resale or other transfer.
As the owner of the copyright to the Manual, Alesis does not give you the right to copy the
Manual, and you agree not to copy the Manual without the written authorization of Alesis. Alesis
has no obligation to provide to you any correction of, or supplement to, the Manual, or any new or
superseding version thereof.
Alesis shall have the right to refuse to sell or otherwise transfer repair parts or materials to you in
its sole discretion. You shall not use, sell or otherwise transfer spare or replacement parts
supplied by Alesis to you (i) to repair or be used in products manufactured for or by third parties
or (ii) to any third parties for any purpose.
You shall not make any warranties or guarantees with respect to the products of Alesis or the use
thereof on behalf of Alesis or in your own name.
The foregoing describes the entire understanding related to sale or transfer of the Manual to you,
and no other terms shall apply unless in a writing signed by an authorized representative of
Alesis.
All Trademarks are property of their respective companies.
Confidential Alesis Service Manual 8-31-0171-A
Warnings
TO REDUCE THE RISK OF ELECTRIC SHOCK OR FIRE, DO NOT EXPOSE
THIS PRODUCT TO WATER OR MOISTURE.
The arrowhead symbol on a lightning flash inside a triangle is
intended to alert the user to the presence of un-insulated
"dangerous voltage" within the enclosed product which may be of
sufficient magnitude to constitute a risk of electric shock to persons.
The exclamation point inside a triangle is intended to alert the user
to the presence of important operating, maintenance and servicing
instructions in the literature which accompanies the product.
REPAIR BY ANY PERSON OR ENTITY OTHER THAN AN AUTHORIZED
ALESIS SERVICE CENTER WILL VOID THE ALESIS WARRANTY.
PROVISION OF THIS MANUAL DOES NOT AUTHORIZE THE RECIPIENT TO
COMPETE WITH ANY ALESIS DISTRIBUTOR OR AUTHORIZED REPAIR
SERVICE CENTER IN THE PROVISION OF REPAIR SERVICES OR TO BE
OR MAKE REPAIRS AS AN AUTHORIZED SERVICE CENTER.
ALL REPAIRS DONE BY ANY ENTITY OTHER THAN AN AUTHORIZED
ALESIS SERVICE CENTER SHALL BE SOLELY THE RESPONSIBILITY OF
THAT ENTITY, AND ALESIS SHALL HAVE NO LIABILITY TO THAT ENTITY
OR TO ANY OTHER PARTY FOR ANY REPAIRS BY THAT ENTITY.
Regarding the Power Supply Fuse
CAUTION: The product under service may employ the use of a
replaceable fuse. Danger of fire or electrocution if fuse is
incorrectly replaced. Replace with only the same type or
equivalent type recommended by the equipment manufacturer.
Regarding the Internal Battery
CAUTION: The product under service may employ the use of a
internal battery. Danger of explosion if battery is incorrectly
replaced. Replace only with the same or equivalent type
recommended by the manufacturer. Dispose of used batteries
according to the manufacturer's instruction.
Confidential Alesis Service Manual 8-31-0171-A
Safety Instructions
Carefully read the applicable items of the operating instructions and these safety
suggestions before using this product. Use extra care to follow the warnings
written on the product itself and in the operating instructions. Keep the operating
instructions and safety suggestions for reference in the future.
1. Power Source. The product should only be connected to a power supply which is described
either in the operating instructions or in markings on the product.
2. Power Cord Protection
step on the cords and such that nothing will be placed on or against them.
3. Periods of Non-use
AC power supply cord should be unplugged from the AC outlet.
4. Foreign Objects and Liquids
openings of the product.
5. Water or Moisture
6. Heat
7. Ventilation
8. Mounting
9. Cleaning
10. Service
11. Damage to the Product
. Do not place the product near heat sources such as stoves, heat registers, radiators or
other heat producing equipment.
. When installing the product, make sure that the product has adequate
ventilation. Improperly ventilating the product may cause overheating, which may damage the
product.
. The product should only be used with a rack which the manufacturer
recommends. The combination of the product and rack should be moved carefully. Quick
movements, excessive force or uneven surfaces may overturn the combination which may
damage the product and rack combination.
. The product should only be cleaned as the manufacturer recommends.
. The user should only attempt the limited service or upkeep specifically described in
the operating instructions for the user. For any other service required, the product should be
taken to an authorized service center as described in the operating instructions.
situations including without limitation when:
a. Liquid has spilled or objects have fallen into the product,
b. The product is exposed to water or excessive moisture,
c. The AC power supply plug or cord is damaged,
d. The product shows an inappropriate change in performance or does not operate
normally, or
e. The enclosure of the product has been damaged.
. AC power supply cords should be placed such that no one is likely to
. If the product is not used for any significant period of time, the product's
. Take care not to allow liquids to spill or objects to fall into any
. The product should not be used near any water or in moisture.
. Qualified service personnel should service the unit in certain
Confidential Alesis Service Manual 8-31-0171-A
ALESIS
M1Active 520 (AS6)
SCHEMATIC
AND
PCB
FILES
Confidential Alesis Service Manual 8-31-0171-A
IO-PCB
XLR1
TRS1
22uF/25V
1
1
3
3
2
2
4
22uF/25V
L
22uF/25V
R56
7
C4
C3
22uF/25V
GND
+12V
LED PCB
TE10
CON4P20
TO MAIN PCB
R2 10K
C2
10K
R1
C1
10K
R4
R3
10K
TE11
CON5P20
MUTE
1
GND
2
-
3
+
4
Hi Freq.
SW3
+2
0
I/P
-2
C18
R15
C19
NOT
NOT
USE
USE
R17
0
NOT USE
SW-PCB
R18
R5
4K7
R36 11K
NOT USE
2
3
Acoustic Space
SW2
-2
-4
7
D11
G/R
MB_C
MID BOOST
NOT USE
0
SW1
R28
14.0K
R13
502J
8K25
D12
G/R
R104
470
C24
(SW-PCB)
C15 103J
C16
OUT IN
C22
103J
AS_C
MB_C
AS-2
MB_-
AS-0
MB_O
W_IN
+12V
T_OP
-12V
C12
104J
C13
822J
C17
562J
8K25
R14
563J
D13
G/R
R105
470
T_OP
12
+
13
-
IC1D
TL074
I/P
R41 7K68
R43 7K6 8
14
C31
152J
TO IO PCB
MB_-
MB_O
IC3C
TL074
10
+
9
-
I/P
W_IN
R29
8
0
TE3
1
2
3
4
5
6
7
8
9
10
11
12
W_IN
+12V
-12V
TE4
C68
4K32
104Z
C69
104Z
R45
1
2
3
4
5
6
7
8
9
10
+12
-12
10UF/50V
10UF/50V
R42
4K32
-
9
+
10
TL074
C32
152J
1K82
R44
+12V
-12V
C84
104
3
C70
C71
1
R46 9K0 9
8
R48 9K0 9
IC2C
W_IN
T_IN
IC9
7812
OGI
IC10
7912
10.0K 1%
R85
10.0K 1%
OGI
2
2
R80
150PF
150PF
1
3
C33
152J
C80
C81
+18V
-18V
R47
-12V +12V
11
-
6
+
5
C34
TL074
152J
R49
R50
4K32
+12V
R81
10.0K
6
7
R82
1.15K
R83
1.15K
4
5
R84
10k
-12V
+12V
R86
10K
8
9
R87
1.15K
R88
1.15K
10
11
R89
10K
-12V
2SA1179
Q2
C25
47uF/10V
R32
1K
AS-0(TE1.5)
AS-0(TE3.5)
+12V
-12V
180K
R21
12
13
R19
165K
R22
80K6
MB-C
104J
272J
C11
C10
+
-
100K
R8
R12
1K82
10K
R11
D9
G/R
R101
470
C83
104
R24
R25
R26
IC3D
TL074
SW4
LOW CUTOFF
AS-2(TE3.3)
AS-2(TE1.3)
AS-C(TE3.1)
AS-C(TE1.1)
5
+
6
-
R10
1K
C9
100uF/16 V
D10
G/R
R102
470
49K9
200K
15K4
14
TL074
11
IC1B
-12V
C8
220pF
R9
5K62
R103
470
R27
14.0K
C23
22pF
C6
R6
4K7
+12V
4
-
2
3
IC1A
TL074
C5
22pF
EQ_IN
EQ_OUT
12345
R37
R38
R16
0
+12V
+
IC3A
TL074
+
SW5
PUSH SW
18K2
43K2
6
5
4
EQ_IN
EQ_OUT
R40
-
-12V
T_OP
+
R7 1K
1
C61
VR1
20KA
22uF/25V
MB_-
MB_O
6K65
-12V
11
IC3B
TL074
1
LOW CUTOFF
7
C20
563J
56Hz
80Hz
100Hz
SW4
C21
563J
56Hz
80Hz
100Hz
TO IO PCB
9K09
7
IC2B
4K64
3
-
1
+
IC4-A
LM339
12
-
2
+
IC4-B
LM339
-
14
+
IC4-C
LM339
-
13
+
IC4-D
LM339
47uF/10V
R34
15K
D4
1N4744
+18V -18V
CLIP_SEN SE_WOOFE R
+12
C79
104
R52
-12
R51 18K2
R53 18K 2
C35
152J
4K02
T_IN
R69
1.87K
2SC2812
Q3
C26
R33
1K
CLIP_SEN SE_WOOFE R
R55
NOT USE
18K2
R76
NOT USE
4
-
2
+
3
IC2A
C36
TL074
152J
9K09
R54
C51
103
R61
NOT USE
CLIP_SEN SE_TWEETER
CLIP_SEN SE_TWEETER
+12
R90
47.5K 1%
C82
10UF/50V
-12
C59
103
R70
53.6K
C57
C56
NOT USE
R35
15K
D3
1N4744
Title
AS6 Active SP CKT
Size Document Nu mber Rev
A2
Date: Sheet of
R63
24.9K
103
C52
3.92K
R91
47.5K 1%
Q4
MBT4401
1
R62
100uF/16 V
C58
103
NOT USE
C37
103J
NOT USE
R64
0
C53
220pF
R71
0
C60
220pF
R58
C38
103J
R66
1K
820
Q5
MBT4401
R73
1K
R56
10
R92
10
+
9
-
C54
+
9
-
100uF/16 V
C65
R60
0
-
13
12
R59
14.0K
R57
14
+
IC2D
TL074
6.98K
W_IN
T_IN
T_IN
+12V
-12V
10
TO MAIN PCB
LM3886
V- V+
4 567
C85
MBT4401
R93
820
R107
820
V- V+NCG
4 567
22.1K
1 1Tuesday, December 2 0, 2005
9.09K
IC7
2
NC
NC
3
O/P
MUTE
8
R65
R67 1K
47P
Q6
C55
224J
R95
R94
R96
10
10
10
MUTE
TE9
MUTE
1
2
3
4
CON4P20
TO LED PIN2
RED
TO LED PIN1
GREEN
TO 3-03-0001 LED
GND
TO LED PCB
LM3886
IC8
2
NC
3
O/P
MUTE
8
R72
R30
1K
C28
33uF/50V -L
0
C62
224J
R100
R99
R98
10
10
10
Q1
2SC2713
R31
10K
ZD6
1N5242B
R39
100K
R106
820
1
V+
G
1
V+
1
2
3
4
5
6
7
8
9
R101
TE2
TE7
-
1
+
2
R97
10
C74
104
TE8
+
1
-
2
C78
10
47UF/50V L
C27
D5
1N4148
TE1
1
2
3
4
5
6
7
8
9
10
11
12
TO SW-PCB
M-PCB
C72
104
C73
104
C66
22UF/50V
C67
104
-18V
C89
104
C86
104
22UF/50V
C87
104
AS_C
MB_C
AS-2
MB_-
AS-O
MB_O
I/P
W_IN
12V
T_OP
-12V
C63
22uF/50V
C64
22uF/50V
C88
104
1
2
3
4
5
6
CON6P20
TE6
-18V
+18V
G
G
-36V
+36V
ALESIS
M1Active 520 (AS6)
ECN
HISTORY
Confidential Alesis Service Manual 8-31-0171-A
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