M-Audio MA26 User manual

Confidential M-Audio Service Manual
BX Subwoofer
[MA26]
Service Manual
v1.1
2017-12-19
© M-Audio. M-Audio is a trademark of inMusic Brands, Inc., registered in the U.S. and other countries. All product
names, company names, trademarks, or trade names are those of their respective owners.
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Do not make illegal copies of this document.
The information in this document contains privileged and confidential
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Confidential M-Audio Service Manual
Preface
This document is intended to assist the service technician in the operation, maintenance and repair of
the M-Audio device. Together with the product’s user guide, this document provides a complete
description of the functionality and serviceability of the product. Any comments or suggestions you
may have pertaining to the documentation are welcome and encouraged.
Read This!
In addition to any purchase price that M-Audio may charge as consideration for M-Audio selling or
otherwise transferring this service manual (“Manual”) to you, if you are not a service and repair facility
(“Service Center”) authorized by M-Audio in writing to be an authorized Service Center, M-Audio sells or
transfers the Manual to you on the following terms and conditions:
Only Service Centers authorized in writing by M-Audio are authorized to perform service and repairs
covered by an M-Audio 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 M-Audio product or part thereof, any and
all warranties of M-Audio as to that product and any service contract with M-
Audio 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
M-Audio 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 M-Audio 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, M-Audio does not give you the right to copy the Manual,
and you agree not to copy the Manual without the written authorization of M-Audio. M-Audio has no
obligation to provide to you any correction of, or supplement to, the Manual, or any new or superseding
version thereof.
M-Audio 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 M-
Audio 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 M-Audio or the use
thereof on behalf of M-Audio 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 M-Audio.
M-Audio is a trademark of inMusic Brands, Inc., registered in the U.S. and other countries. All product
names, company names, trademarks, or trade names are those of their respective owners.

Confidential M-Audio Service Manual
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 uninsulated “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 M-
AUDIO SERVICE CENTER WILL VOID THE M-AUDIO WARRANTY.
PROVISION OF THIS MANUAL DOES NOT AUTHORIZE THE RECIPIENT TO
COMPETE WITH ANY M-AUDIO 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 M-
AUDIO SERVICE CENTER SHALL BE SOLELY THE RESPONSIBILITY OF
THAT ENTITY, AND M-AUDIO 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 M-Audio Service Manual
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. AC power supply cords should be placed such that no one
is likely to step on the cords and such that nothing will be placed on or against them.
3. Periods of Non-Use. If the product is not used for any significant period of time, the
product’s AC power supply cord should be unplugged from the AC outlet.
4. Foreign Objects and Liquids. Take care not to allow liquids to spill or objects to
fall into any openings of the product.
5. Water or Moisture. The product should not be used near any water or in moisture.
6. Heat. Do not place the product near heat sources such as stoves, heat registers, radiators
or other heat producing equipment.
7. Ventilation. When installing the product, make sure that the product has adequate
ventilation. Improperly ventilating the product may cause overheating, which may damage
the product.
8. Mounting. 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.
9. Cleaning. The product should only be cleaned as the manufacturer recommends.
10. Service. 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.
11. Damage to the Product. Qualified service personnel should service the unit in
certain 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.

Brand: M-Audio
Model: BX Subwoofer
Version:1.0
Date:09/22/2014
Item Material P/N Material Name Specification Qty Unit Lead time (days)
1 91-BXSWF-001-R Speaker BX Subwoofer speaker 1PCS 70
2 12-0300-1823-R Power cable L=1.83M,black SVT 3C 18# 1 PCS 20
3 16-70MA-UDIO-R Foot switch L=1.8M TS head, silkscreened “M-AUDIO” 1 PCS 60
4 PE8007-R PO bag L800*W780*T0.04mm, with 4 holes 1 PCS 15
5 PRE260-R User guide L140*W216mm,black printing, 80g 1 PCS 15
6 PRG072-R Warranty book L140*W216mm,black printing, 80g 1 PCS 15
7 GB0468-R Gift box L491*W423*H518mm 250g 1 PCS 15
8 CT0569-R Ship carton L506*W438*H538mm A=B 1 PCS 15
9 LB2438-R Label L50*W44mm,UPC 1 PCS 15
10 LB2439-R Label 55*13mm,S/N label 1 PCS 15
11 LB1716-R Label 40*20mm,C/N label 1 PCS 15
12 LB1717-R Label 29*13mm,C/N label 1 PCS 15
13 PF0122-R Polyfoam L520*W411*H115mm 25KG 1 PCS 15
14 PP0004-R Paper Card L80*W490mm K9K L 1 PCS 15
15 PP0036-R Paper Card L320*W210mm B3B 1 PCS 15
16 TA0043-R Silica gel 45*56, 5g 1 PCS 15
17 91-BXSWF-001-R Speaker BX Subwoofer speaker 1 SET
18 BR10038-R Cabinet W332*D398*H440mm,MDF, PVC warpped with acoustic
absorber and feet 1PCS 45
19 WR10018-R Subwoofer 10" 4Ω140W, iron basket, Kevlar cone, rubber surround 1 PCS 45
MA26/BX Subwoofer BOM

Brand: M-Audio
Model: BX Subwoofer
Version:1.0
Date:09/22/2014
Item Material P/N Material Name Specification Qty Unit Lead time (days)
MA26/BX Subwoofer BOM
20 GK30H003-R EVA L321*W13*T2mm, black, single side with glue 1 PCS 15
21 GK20H006-R EVA L248*W13*T2mm, black, single side with glue 1 PCS 15
22 GK70H001-R EVA L780*W10*T1.0mm, black, single side with glue 1 PCS 15
23 GK20H023-R Sponge L200*W50*T5mm, grey, single side with glue 1 PCS 15
24 FP-SBX10-S002-R Plastic faceplate HIPS material, L378*W294.7*H19.8mm, softtouch paint,
recessed logo 1PCS 30
25 ME10F06-B1-R Grille Φ259.4*H13.5*T0.8mm, round hole, 2*3.5mm,silver
painted 1PCS 25
26 GK01R007-R Rubber ring Ф262.95*H10mm 1 PCS 25
27 SM4CA003Y-HK2-R Screw CA4*25mm, Ф7.5*3.4mm 1 PCS 20
28 SM4TA001X-HK1-R Screw TA4*20mm, Ф7mm 1 PCS 20
29 SM3BA001X-HK-R Screw BA3.5*20mm 1 PCS 20
92-BXSWF-000-R BX Subwoofer Amplifier Assemblies (US version)
92-BXSWF-001-R BX Subwoofer Amplifier Assemblies (EU/UK version)
Amplifier include below main parts:
93-BXSWF-000-R PCB Assembly 1 BX Subwoofer OUTPUT PCB Assembly 1 SET 40
93-BXSWF-100-R PCB Assembly 2 BX Subwoofer INPUT Assembly 1 SET 40
93-BXSWF-200-R PCB Assembly 3 BX Subwoofer PRE PCB Assembly 1 SET 40
93-BXSWF-300-R PCB Assembly 4 BX Subwoofer AMP PCB Assembly 1 SET 40
93-BXSWF-400-R PCB Assembly 5 BX Subwoofer PWR PCB Assembly 1 SET 40
14-SBX10-00000 Transformer SBX10 115V*2 OUTPUT 36V*2/2.5A 14.7V*2/0.5A 1 SET 40
45
Amplifier
30 1 SET

Item Issue Maintenance procedure
Woofer
1
Replace new Amp procedures:
1. Photo A: Take off screws and
plastic baffle.
2. Photo B: Take off woofer screw
and take out bad woofer.
3. Photo C: Take off screws of rear
panel and take out bad Amp.
4. Photo D: Pull out LED wire.
5. Replace new Amp.
6. Insert LED wire, fix with glue and
lock screws of rear panel.
2
Amplifier
BX Subwoofer Service Manual
Photos
Replace new woofer procedures:
1. Photo A: Take off screws and
plastic baffle.
2. PhotoB: Take off woofer screw
and take out bad woofer.
3. Change new woofer.
4. Lock woofer screw.
5. Install plastic baffle with screws.
PhotoA
Use hexagonal
screwdrivers to
take off baffle
screw
PhotoB
Use cross
screwdriver to
take off woofer
PhotoC
Use cross
screwdriver to
take off screw
PhotoD Use knife to cut
glue or HM-EI soften
glue,then pull out LED wire

Tools: Cross screwdriver, hexagonal screwdriver, hot melt glue tool, glue bottle, art knife
Auxiliary material: HM-EI or ethyl alcohol, Hot melt glue stick, Yellow Glue
Change LED wire procedures:
1. Photo A: Take off screws and
plastic baffle.
2. Photo B: Take off woofer screw
and take out bad woofer.
3. Photo C: Take off screw of rear
panel and take out Amp.
4. Photo D: Pull out LED wire.
5. Photo F: Use the high
temperature of glue tool head to
melt the fixed
g
lue and take out LED
wire.
No LED
3
PhotoF Use the high temperature of
glue tool head to melt the fixed glue and
take out LED wire
PhotoA Use
hexagonal
screwdrivers to
take off baffle
screw
PhotoC Use cross
screwdriver to take
off screw