Alesis MultiMix8FX XA1 User manual

Confidential Alesis Service Manual 8-31-0127-A
ALESIS
MultiMix8FX (XA1)
Service Manual
P/N: 8-31-0127-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 [email protected].
Copyright © 2003 Alesis, LLC
ATTENTION!
THIS DOCUMENT CONTAINS SENSITIVE
PROPRIETARY INFORMATION. ALL
RECIPIENTS MUST HAVE A CURRENT NON-
DISCLOSURE AGREEMENT ON FILE WITH
ALESIS, LLC.
DO NOT DISTRIBUTE THIS DOCUMENT IN
ELECTRONIC FORM
WATERMARK DISTRIBUTION
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Confidential Alesis Service Manual 8-31-0127-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 8-31-0127-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.

Confidential Alesis Service Manual 8-31-0127-A
Safety Suggestions
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.

Effects Section Components
Program Selection Knob
You can use this knob to assign one of 100 effect programs to
your mix. Turning the knob to the right increments the program
number, and turning it to the left decrements the program number.
You can control the level of the effect for each channel via the
channel’s AUX B knob. You must PRESS the effect knob to
activate the selected effect.
LED Display
This display shows you the number of the current program.
CLIP Indicator
When lit, this LED tells you that there is a signal clip at the
internal effects input. This means that you should reduce the signal
via the EFFECTS / AUX RET B LEVEL control.
SIG Indicator
When lit, this LED indicates that the effects processor is receiving
a signal.
Effect Descriptions
HALL
This type of reverb simulates the ambience of a grand concert hall.
ROOM
This type of reverb reproduces the more intimate ambiance of
natural room acoustics.
PLATE
These are simulations of metal plate reverbs, as used on classic
recordings from the '70s and '80s.
CHAMBER
These are simulations of the reverb created by artificial echo
chambers, as used on classic recordings of the '50s and '60s.
CHORUS
These create the effect of multiple voices (or instruments)
sounding at once from a single input.
FLANGE
These create a sweeping, swooshing sound effect that you will
probably recognize.
DELAY
These effects are based on a discreet repetition or echo of the
input.
PITCH
These effects transpose the pitch of the input signal and blend the
effect signal with the original to create harmonies.
MULTI & MULTI II
These are combinations of two or more of the above effects.
SERVICE MANUAL
MODEL:MULTIMIX 8FX

Specifications
For the more technical-minded, here are some detailed
specifications for the MultiMix’s operating levels.
Input Channels
Mic In Sensitivity Range: -60dBu to –10dBu nominal, +5dBu
Maximum
Line In Sensitivity Range: -40dBu to -+10dBu nominal,
+25dBu maximum
Mic/Line Gain Range: +10 to +60dB
Equalization
High-Pass Filter: 75Hz, 18dB/octave
High Shelving: 12kHz, +/- 15dB
Mid Bandpass/Band Reject: 2.5 kHz, +/- 15dB
Low Shelving: 80Hz, +/- 15dB
Aux Sends
Aux Send A & B Gain Range: -∞to +10dB
Aux Returns
Aux Return A Gain Range: -∞to +15dB
Effects Level/
Aux Return B Gain Range: -∞to +15dB
Channel Levels
Channel Level Gain Range: -∞to +10dB
Master Levels
Main Mix, Ctrl Room Gain
Range: -∞to +10dB
1/4” Inputs
Stereo Aux Return Level: +4dBu nominal, +20dBu maximum
RCA Inputs
Tape In Level: -10dBV nominal, +5dBV maximum
1/4” Outputs
Main Mix, Ctrl Room,
Ext Aux Send Level: +4dBu nominal, +20dBu maximum
Headphone Output: 75 ohm output impedance
>105mW into 75 ohms, >40mW
into 600ohms
RCA Outputs
Tape Out Level: -10dBV nominal, +5dBV maximum

DISASSEMBLY PROCEDURES
1. REMOVAL OF TOP PANEL/BOTTOM PANEL (Fig1)
(A) TAKE OUT THE 12 PCS SCREW FROM WHICH
THE TOP PANEL
(B) TAKE OUT THE 7 PCS SCREW FROM WHICH
THE BOTTOM PANEL
Fig.1
2. REMOVAL OF MAIN P.C.B (Fig2)
(A) REMOVE THE 47 PCS KNOB FROM WHICH THE TOP PANEL
(B) REMOVE THE 19 PCS NUT AND 19 PCS WASHER FROM WHICH THE TOP PANEL
(C) REMOVE THE 17 PCS SCREW FROM WHICH THE TOP PANEL
Fig.2

3.REMOVAL OF POWER P.C.B (Fig.3)
(A) REMOVE THE 2 PCS SCREWS FROM THE POWER P.C.B
(B) REMOVE THE 2 PCS SCREWS FROM THE BRACKET
(C) REMOVE THE 3 PC OF CABLE CONNECTOR FROM THE POWER P.C.B
Fig.3

WIRING DIAGRAM
(US/EU/UK/AUS NZ)

PACKING DIAGRAM
(US/EU/UK/AUS NZ)

EXPLODE DIAGRAM
(US/EU/UK/AUS NZ)
SEQUENCIAL NO OF EXPLODE DIAGRAM WILL BE MARKED ON REF. COLUMM OF BOM LIST

Confidential Alesis Service Manual 8-31-0127-A
ALESIS
MultiMix8FX (XA1)
BOM

LEVEL P/N DESCRIPTION QTY REF
1 BATO-220 GASKET 1 17
1 LAC22ALE11 STICKER BARCODE UPC 1 30
1 7-53-0228 STICKER COMPLIANCE 1 31
1 7-13-0037-A PLATE METAL THERMAL TRANSFER 1 18
1 MT1304424 ALUMINUM PANEL 1 12
1 MT1304430 SUBPANEL 1 14
1 MT1330005 TOP PANEL 1 19
1 MT1330309 CHASSIS BOTTOM 1 22
1 9-10-0062-A BEZEL LED DISPLAY XA SERIES MIXERS 1 36
1 9-15-0332-A KNOB CAP LARGE BLUE 2 21
1 9-15-0378-A KNOB CAP LARGE BLUE 6 10
1 9-15-0382-A KNOB LARGE GREY 8 11
1 9-15-0338-A KNOB CAP SMALL BLUE 19 5
1 9-15-0336-A KNOB CAP SMALL GREEN 8 9
1 9-15-0337-A KNOB CAP SMALL RED 12 8
1 9-15-0379-A KNOB CAP SMALL BLACK 4 1
1 9-15-0380-A KNOB SMALL GREY 38 7
1 9-15-0384-A BUTTON CAP RECT GREY 6 3
1 PT1310629 ENDCAP PLASTIC RIGHT 1 23
1 PT1310630 ENDCAP PLASTIC LEFT 1 6
1 PT1310633 CAP SUPPORT 4 4
1 9-15-0383-A KNOB SMALL BLACK 4 2
1 9-15-0381-A KNOB SMALL GREY 1 33
1 PXA1ALE01 PACKING ASSEMBLY 1
2 CB313N009 CARDBOARD 1
2 CGXA1310ALE01 GIFT BOX 1
2 CTXA1513ALE01 BOX SHIPPING 0.25
2 PE150350BO POLYBAG 0.007
2 PE3636304RHP POLYBAG 0.007
2 PLXA101 FOAM ENDCAP PACKING SET 1
2 7-51-0130 MANUAL REFERENCE 1
2 7-51-1219 SHEET "WELCOME TO ALESIS FAMILY" 5 x 8" 1
2 7-91-1002 GEL SILICA 5G PACKET 1
1 RU1304402 RUBBER 1 15
1 RU1304406 RUBBER 1 37
1 SC0306RIBI SCREW 21 13
1 TF48033201UL TRANFORMAT 1
1 TWJKMC010301 POWER ASS'Y 1 29
1 TWSWRA19-20101 POWER SWITCH ASS'Y 1 27
1 TWSWRS-001C-B POWER SWITCH ASS'Y 1 28
1 WS114009605IN WASHER 19 24
1 5-00-1308 SCREW 19 20
1 9-23-1024 FEET RUBBER 4 32
1 9-79-029001 MIXER PCB ASS'Y 1
29-40-0291 MIXER PCB 1
29-79-0291 MIXER PCB ASS'Y 1 26
3 0-15-0000 RESISTOR 0O (SMD) 4 R295,298,306,323
3 0-15-0100 RESISTOR 10O (SMD) 1 R411
3 0-15-0101 RESISTOR 100O (SMD) 2 R284,299
3 0-15-0102 RESISTOR 1K (SMD) 1 R52
3 0-15-0103 RESISTOR 10K (SMD) 39
R1,2,7,8,9,10,14,15,19,20,24,25,31,35,36,37,42,44,45,
58,73,79,85,86,91,92,95,96,142,146,242,256,280,290,
305,319,330,331,332
3 0-15-0104 RESISTOR 100K (SMD) 4 R220,222,324,333
3 0-15-0105 RESISTOR 1M (SMD) 8 R231,232,234,235,254,255,260,261
3 0-15-0121 RESISTOR 120O (SMD) 19 R3,4,5,11,16,17,18,23,26,43,49,50,53,60,61,67,80,160
,199
MULTIMIX 8FX BOM

3 0-15-0152 RESISTOR 1K5 (SMD) 14 R163,208,277,278,282,283,291,292,296,297,312,313,
314,315
3 0-15-0153 RESISTOR 15K (SMD) 6 R78,110,339,343,345,346
3 0-15-0203 RESISTOR 20K (SMD) 18 R6,63,64,65,66,117,125,126,127,128,134,135,136,137
,227,228,229,233
3 0-15-0221 RESISTOR 220O (SMD) 1 R270
3 0-15-0222 RESISTOR 2K2 (SMD) 8 R144,145,149,150,151,152,156,157
3 0-15-0242 RESISTOR 2K4 (SMD) 2 R259,264
3 0-15-0272 RESISTOR 2K7 (SMD) 3 R154,155,209
3 0-15-0273 RESISTOR 27K (SMD) 2 R340,342
3 0-15-0303 RESISTOR 30K (SMD) 10 R33,99,100,106,107,108,111,112,113,115
3 0-15-0332 RESISTOR 3K3 (SMD) 4 R243,244,245,246
3 0-15-0362 RESISTOR 3K6 (SMD) 4 R205,212,318,320
3 0-15-0431 RESISTOR 430O (SMD) 1 R262
3 0-15-0432 RESISTOR 4K3 (SMD) 2 R241,252
3 1-15-0470 RESISTOR 47O (SMD) 1 R114
3 0-15-0471 RESISTOR 470O (SMD) 6 R116,118,123,129,258,269
3 0-15-0472 RESISTOR 4K7 (SMD) 18 R55,59,93,97,271,272,273,274,275,276,285,286,287,2
88,336,337,338,344
3 0-15-0473 RESISTOR 47K (SMD) 5 R265,266,267,268,307
3 0-15-0479 RESISTOR 4.7O (SMD) 4 R68,69,70,71
3 0-15-0511 RESISTOR 510O (SMD) 8 R87,88,89,90,102,103,104,105
3 0-15-0512 RESISTOR 5K1 (SMD) 33
R32,34,56,57,109,239,247,248,249,250,253,257,263,2
79,281,289,293,308,309,310,311,316,317,321,322,326
,327,328,329,334,335,341,347
3 0-15-0560 RESISTOR 56O (SMD) 1 R147
3 0-15-0561 RESISTOR 560O (SMD) 8 R172,173,174,175,185,186,188,189
3 0-15-0562 RESISTOR 5K6 (SMD) 1 R124
3 0-15-0563 RESISTOR 56K (SMD) 4 R72,94,225,226
3 0-15-0621 RESISTOR 620O (SMD) 1 R251
3 0-15-0622 RESISTOR 6K2 (SMD) 2 R13,22
3 0-15-0623 RESISTOR 62K (SMD) 4 R119,120,121,122
3 0-15-0681 RESISTOR 680O (SMD) 1 R143
3 0-15-0682 RESISTOR 6K8 (SMD) 25 R46,47,48,51,148,200,201,202,203,204,206,207,211,2
13,214,215,216,217,218,221,224,301,302,303,304
3 0-15-0911 RESISTOR 910O (SMD) 19 R162,165,166,167,168,169,170,176,177,178,179,180,
183,184,190,191,192,194,240
3 0-16-1001 RESISTOR 1K (SMD)1% 4 R158,159,171,182
3 0-16-1002 RESISTOR 10K (SMD)1% 17 R27,28,29,30,38,39,40,41,195,196,197,198,210,219,2
36,237,325
3 0-16-1301 RESISTOR 1K3 (SMD)1% 13 R74,75,76,77,81,82,83,84,138,139,140,141,238
3 0-16-1472 RESISTOR 14.7K (SMD)1% 4 R153,161,164,187
3 0-16-2001 RESISTOR 2K (SMD)1% 2 R54,62
3 0-16-2201 RESISTOR 2.2K (SMD)1% 2 R12,21
3 0-16-6041 RESISTOR 6.04K (SMD)1% 2 R98,101
3 0-16-7321 RESISTOR 7.32K (SMD)1% 4 R130,131,132,133
3 0-16-7501 RESISTOR 7K5 (SMD) 1 R230
3 0-16-8201 RESISTOR 8K2 (SMD)1% 5 R181,193,223,294,300
3 1-56-0100 CERAMIC 10P (SMD) 2 C32,40
3 1-56-0101 CERAMIC 100P (SMD) 20 C2,3,4,13,16,18,19,22,23,30,31,35,36,41,42,44,45,97,
141,144
3 1-56-0102 CERAMIC 1000P (SMD) 2 C104,105
3 1-56-0103 CERAMIC 0.01UF (SMD) 1 C332
3 1-56-0104 CERAMIC 0.1UF (SMD) 69
C1,12,14,17,21,28,33,34,38,39,43,46,51,65,66,67,68,7
8,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,96
,100,101,102,103,107,111,112,113,114,115,120,121,1
22,123,124,134,135,136,138,139,140,142,143,145,148
,149,150,151,153,154,162,163,164,165

3 1-56-0200 CERAMIC 20P (SMD) 44
C5,6,7,15,20,24,25,26,27,29,37,56,57,62,63,64,73,74,
75,76,77,95,116,117,118,119,125,126,127,128,129,13
0,131,132,133,137,146,147,152,155,157,158,159,160
3 1-56-0331 CERAMIC 330P (SMD) 18 C8,9,10,11,58,59,60,61,69,70,71,72,98,99,106,108,10
9,110
3 1-56-0470 CERAMIC 47P (SMD) 2 C156,161
3 1-56-0681 CERAMIC 680P (SMD) 8 C47,48,49,50,52,53,54,55
3 2-50-4148 DIODE 12 D1,2,3,4,22,23,24,25,26,27,28,29
3 2-71-0084 IC TL084 1 IC15
3 2-71-4580 IC NJM4580E 25 IC1,2,3,4,5,6,7,10,11,12,13,16,18,19,20,21,23,25,26,2
8,29,30,31,32,33
3 2-72-0339 IC LM339 5 IC14,17,22,24,27
3 2-75-1101 IC AL1101 1 IC8
3 2-75-1201 IC AL1201 1 IC9
3 2-99-0021 DIODE BAV21 8 D5,6,7,8,9,10,11,12
3 6-00-0008 ENCODER 1 VR11
3 9-40-0291 MIXER PCB 1
3 BAKCA-04 PCB HOLDER 2
3 BALD40210-0 LED HOLDER 24 LED1~LED24
3 CN0820001101 8P CONNECTOR 110mm 1 TE1
3 EC10616TS ELECT 10UF/16V(S) 1 C333
3 EC10625T ELECT 10UF/25V 8 C167,169,172,176,182,184,188,192
3 EC10635TS ELECT 10UF/35V (S) 1 C226
3 EC10710TS ELECT 100UF/10V(S) 8 C271,272,274,275,277,278,280,281
3 EC10806 ELECT 1000UF/6V 4 C183,187,191,195
3 EC22450 ELECT 0.22UF/50V 8 C180,181,185,186,189,190,193,194
3 EC22450TS ELECT 0.22UF/50V(S) 4 C201,204,207,210
3 EC22550TSU ELECT 2.2UF/50V 4 C273,276,279,282
3 EC22616TS ELECT 22UF/16V(S) 2 C228,229
3 EC22704T ELECT 220UF/4V 8 C289,296,302,303,304,305,306,308
3 EC47625 ELECT 47UF/25V 9 C178,179,196,197,198,199,224,225,227
3 EC47625TS ELECT 47UF/25V(S) 38
C200
,
202
,
203
,
205
,
206
,
208
,
209
,
211
,
212
,
215
,
218
,
221
,
230,242,248,254,260,267,268,269,270,287,288,294,29
5,297,298,299,300,301,307,309,310,311,312,313,314,
315
3 EC47650 ELECT 47UF/50V 8 C166,168,170,171,173,174,175,177
3 IC4580L IC NJM4580L 1 IC35
3 JK5031 XLR BASE 4 MIC1,2,3,4
3 JK6353-02-250 MIC BASE 19 J1~J19
3 LD-LG2040 GREEN LED 12 LED2,3,11,12,13,14,15,16,17,18,19,20
3 LDLT0311-41 RED LED 7 LED1,5,6,21,22,23,24
3 LDLY2040A YELLOW LED 5 LED4,7,8,9,10
3 MC12350T CAPACITOR 0.012UF/50VJ 16 C217,223,238,240,244,246,250,252,256,258,261,262,
264,265,283,290
3 MC18350T CAPACITOR 0.018UF/50VJ 16 C213,214,216,219,220,222,231,232,233,234,235,236,
237,243,249,255
3 MC33350T CAPACITOR 0.033UF/50VJ 16 C239,241,245,247,251,253,257,259,263,266,284,285,
286,291,292,293
3 MR249116 RESISTOR 2.49K 1/16W 8 R367,368,376,377,382,383,388,389
3 MR392116 RESISTOR 3.92K 1/16W 8 R370,371,373,374,379,380,385,386
3 MR680116 RESISTOR 6.8K 1/16W 8 R348,351,352,355,356,359,360,363
3 MR825016 RESISTOR 825O 1/16W 8 R336,369,372,375,378,381,384,387
3 5-03-0036 STANDOFF METAL F-F 13.5MM M3 8
3 RJGJ107NI RCA BASE 1 RCA1
3 R004716 RESISTOR 0.47O 1/16W 8 R349,350,353,354,357,358,361,362
3 R18316 RESISTOR 18K 1/16W 2 R364,365
3 SC0306RIBI SCREW 8
3 SWSFPC12MC02 SWITCH 6 SW1,2,3,4,5,6
3 TE162000602 6P TERMINAL 2 TE2,3
3 TE812000811 8P CONNECTOR 1 TE1
3 TRA1316GR TRANSISTOR 2SA1316GR 8 Q20,21,22,23,24,25,26,27
3 TRBC847B TRANSISTOR 16 Q1,2,3,4,5,6,7,8,11,12,13,14,16,17,18,19

3 TRBC857B TRANSISTOR BC857B 3 Q9,10,15
3 VRK10301202 VR 10K 6 VR38,39,40,41,42,43
3 VRK10301209 VR 10KB 4 VR48,49,50,51
3 VRK1030904 VR 10KW 12 VR25,26,27,28,29,30,32,33,34,35,36,37
3 VRK1030905 VR 10KB 4 VR44,45,46,47
3 VRK5020902 VR 5KRD 4 VR1,2,3,4
3 VRK50301203 VR 50K 6 VR9,10,16,17,22,23
3 VRK50301204 VR 50K 2 VR24,31
3 VRK5030903 VR 50K 12 VR5,6,7,8,12,13,14,15,18,19,20,21
2 9-79-0302-02 MICON PCB ASS'Y 1 25
3EC22716TS ELECT 220UF/16V(S) 1 M_C3
3LDT2601G LED 1 M_LED1
3MT1303214 FIXED PLATE 1 (M_IC2)
3RS10118J05 RESISTOR 100O (SMD) 3 M_R1,M_R16,M_R17
3RS22118J05 RESISTOR 220O (SMD) 8 M_R6~M_R13
3RS47018J05 RESISTOR 47O (SMD) 3 M_R4,M_R14,M_R15
3RS47118J05 RESISTOR 470O (SMD) 2 M_R2,M_R3
3 TE162000601 TERMINAL 2 M_TE1,M_TE3
3TRBC857B TRANSISTOR BC857B 2 M_Q1,M_Q2
31-56-0104 CERAMIC 0.1UF (SMD) 4 M_C1,M_C2,M_C5,M_C15
32-27-0060 IC AL3201B 1 M_IC2
37-01-0033 CRYSTAL 12MHz 1 M_M1
39-40-0302 MICON PCB 1
39-61-0106 IC 87C518K 1 M_IC1
2 9-79-0304 POWER PCB ASS'Y 1 16
3 1-56-0104 CERAMIC 0.1UF (SMD) 2 C320,321
3 2-01-4003 DIODE 8 D13,14,15,16,17,18,19,20
3 9-40-0304 POWER PCB 1
3 DIZBZX79C47V DIODE 1 D21
3 EC107100TS ELECT 100UF/100V(S) 1 C329
3 EC10735T ELECT 100UF/35V 1 C322
3 EC10835 ELECT 1000UF/35V 2 C323,324
3 EC476100 ELECT 47UF/100V 2 C326,327
3 EC47625TS ELECT 47UF/25V (S) 2 C325,331
3 EC47650TS ELECT 47UF/50V (S) 2 C328,330
3 IC7805 IC 7805 1 IC38
3 IC7815 IC 7815 1 IC40
3 IC7915 IC 7915 1 IC39
3 JW5206T JUMP WIRE 1 R405
3 R10018 RESISTOR 10O 1/4W 1 R408
3 R10318 RESISTOR 10K 1/4W 1 R407
3 R20318 RESISTOR 20K 1/4W 1 R410
3R39418 RESISTOR 390K 1/4W 1R409
3TE612000202 2P CONNECTOR 1TE10
3 TE612000301 3P CONNECTOR 1 TE7
3 TE612000402 4P CONNECTOR 1TE8
3 TE612000801 8P CONNECTOR 1TE9
3 TRBD239C TRANSISTOR 1IC41

Confidential Alesis Service Manual 8-31-0127-A
ALESIS
MultiMix8FX (XA1)
SCHEMATIC
AND
PCB
FILES

8 8
7 7
6 6
5 5
4 4
3 3
2 2
1 1
D D C C B B A A
GAIN
1 2
3
CH FADER
PAN
1
2
3
1
2
3
XLR
AUX B LEVEL AUX A LEVEL
AUX B LEVEL AUX A LEVEL
MONO INPUT (1-4)CHANNELS STEREO INPUT (5-6)CHANNELS
AUX A RETURN channle 2
channle 1 MIC1 channle 2 MIC2 channle 3 MIC3 channle 4 MIC4
LINE 2 LINE 3 LINE 4
J9 J10 J11
R354 R358 R362
R353 R357 R361
R352 R356 R360
R355 R359 R363
C170 C173 C175
R82 R83 R84
C48 C49 C50
C9 C10 C11
C171 C174 C177
R75 R76 R77
C53 C54 C55
C184 C188 C192
R28 R29 R30 R39 R40 R41
C169 C172
?
C59 C60 C61
D25 D27 D29
R376 R382 R388 Q3 Q5 Q7
VR2 VR3 VR4
C187 C191 C195
R69 R70 R71
R377 R383 R389
C66 C67 C68
C70 C71 C72 Q23 Q25 Q27
Q22
Q24 Q26
Q22 Q24 Q26
R88 R89 R90
D7 D9 D11
R372 R378 R384
C80 C81 C82
R375 R381 R387
D8 D10 D12 R103 R104 R105
C90 C91 C92
IC11A IC12A IC13A
C203 C206 C209
R374 R380 R386
R374 R380 R386
R135 R136 R137
C185 C189 C193 R47 R48 R51
C186 C190 C194
C204 C207 C210 R139 R140 R141
IC11B IC12B IC13B
C205 C208 C211 C101 C102 C103 R64 R65 R66
C232 C233 C234
R167 R168 R169
R201 R220 R203
C245 C251 C257
C247 C253 C259 R198
R197 R196 R214 R215 R216
VR6 VR7 VR8
C243 C249 C255
R150 R151 R152
R177 R178 R179
R173 R174 R175
C246 C252 C258
C248 C254 C260
C122 C123 C124
C117 C119 C118
R232 R235
R234
C274 C277 C280
R266 R267 R268
Q12 Q13 Q14
R287 R288 R286
R302 R303 R304
R313 R314 R315
C276 C279 C282
Q17 Q18 Q19
LED22 LED23 LED24
R272 R273 R274
VR33 VR34 VR35
R244 R245 R246 VR26
VR27 VR28
R327 R328 R329
VR39 VR40 VR41
R309 R310 R311
VR45 VR46 VR47
R248 R249 R250
C126 C127 C128
R248 R249
IC19B IC20B IC21B
IC19A IC21A IC20A
R250
C275 C278 C281
C113 C114 C115
SW2 SW3 SW4
J13 LINE 7/8
C31
R86 C63
R107
R113 C74
C39 R79
IC6B
C87
C221 R128
R211 R220
VR10
C222 R145
C265
R191
VR17
R192
R186
R224VR23
C266
C293
R219
C223
C297
C131
R255
IC26B
C296
R278
VR49
C158 R345
R338
IC31A
C154
C305
VR43
R297
R317 R322
R252
R276
VR37 VR30
VR43
R292
C308
IC31B
C165
C159
R344
VR49
R283
C306
C135
C295
C133
R261
C290C291
C292
R237
R218
VR23
R165
C219
VR10 C222
VR23R207
R189C218
R127
C86
J17 LINE 7/8
C45
R92 C64
R100
C77 R115
IC6A
R184
1
2
3
HI
MID
LOW
1
4148
2
3
FADER
BAL
1 3
BAL
3 1
2
3
2
1
3
2
1 1
3
2
1
2
1
2
1
3
2
1 1
1
3
C
A
C A
LINE L LINE R
1
2
3
1
2
3 1
2
3
XA1IN.SCH XA1 INPUT CIRCUIT DIAGRAM
YH HORNG ELECTRONIC CO., LTD.
A2
11Tuesday, November 18, 2003
Title Size Document Number Rev Date: Sheet of
3
2
3 3
2
1
3 3
2 2
+48V
V-15V
B+
V+15
+15V
B-
V+15
V+15 V-15
V-15
V-15 V-15
V-15
V+15V
V+15
V-15
V+15
V-15
Q11
BC847C
Q16
BC847C
D20 1N4002
D17
1N4002
C329
100uF/100V
IC41 BD239C
R408 10
C330
47uF/50V
C328
47uF/50V
D21
47V
R407
10K
R409
390K
C224
47/25V
R225
56K
VR24 503KG
R257
5K1
C120 100n
R263
5K1
R226
56K
C142
100n
S01
PHANTOM
C327
47uF/100V
D19
1N4002
C326
47uF/100V
D18
1N4002
IC40 7815
1
2
3O
G
I
C331
47uF/25V
C325
47uF/25V
IC39 7915
1
2
3
O
G
I
C324
1000uF/35V
C323
1000uF/35V
D13
1N4002
D15
1N4002
D14
1N4002
D16
1N4002
IC35 7805
1
2
3O
G
I
C298
47/25V
R239
5K1
C129 20P
R242 30K
C137 20P
R256 30K
R253
5K1
C301
47/25V
VR24
503KG
C298
47/25V
C?
100uF/35V
POWER SW
C321 .1uF
C320 .1uF
-
+
IC23A
NJM4558D
2 3
4
1
-
+
IC23B
NJM4558D
6 5
8
7
R316
5K1
R321
5K1
LED4 +48V
R367 2K49
R368 2K49
C200
47/25V
R370
3K92
R371 3K92
C89
100n
R134
20K
VR2
50KB
VR3
50KB
C231 183K
R166
910
R200
6K8 R213
6K8
VR5
50KB
C237
183K
R176
910
R172
560
R243
3K3
VR25
10KW
R277
1K5
R241
4K7
R275
4K3
VR36
10KW
VR29 10KW
C241
333
C239
333
R195
10K
R282
1K5
C33 123K
C116
20P
R231
1M
C271
100/10V
C125
20P
R247
20K
R326
5K1
R308 5K1
C273
2.2/50V
C180
.22/50V
R138
1K3
R46 6K8
C181
.22/50V
C201
.22/50V
-
+
IC10B
NJM4580E
6 5
8
7
C100 100n
C202
47/25V
R63 20K
SW1
LPF
R27
10K
R149
2K2
S R T
TS RS
J8LINE 1
Q1
BC847B
Q20
BC847B
C112
100n
R247
5K1
R410
20K
R271
4K7
VR32
10KW
VR38
10KAC
VR44
10KB
C272
100/10V
10KAC
R301
6K8
LED21
LED R
R265
47K
R364
18K
R365
18K
R348
6K8
R351
6K8
R349 0.47
R350
0.47
C166
47/50V R81
1K3
C47
680P
C8 330P
C165
47/50V R74
1K3
C52
680P
C182
10/25V
R38
10K
C167
10/25V
C58
330
Q20
2SA1316GR
R285
4K7
R312
1K5
D23
?
R?
62K
VR1 5KAC
C183
1000UF/6V
R68
4.7
C65
100n
Q21
2SA1316GR
C79
100n
R369
825
D6
BAV-21-TFK
R9
10K
C242
47/25V
S R T
TS RS
J1
L/CH R1
10K
C6 20P
R2 10K
-
+
IC1B
NJM4580M
6 5
8
7
R10 10K
C7 20P
C12
100n
-
+
IC1A
NJM4580M
2 3
4
1
C1 100P
R7
10K
C3
100P
C2 100P
C17 100n
R15 10K
C15 20P
R14
10K
R8
10K
C5
20P
C4 100P
S R T
TS RS
J2
R/CH
C240
123K
C121
100n
-
+
IC10A
NJM4580M
2 3
4
1
-
+
IC18A
NJM4580M
2 3
4
1
-
+
IC18B
NJM4580M
6 5
8
7
C35
100P
R73
10K
VR9
503KB
VR16
503KB
VR22
503KB
C217
123K
VR42
10KAC
VR48
10KB
R87
510
R126
20K
C87 100n
C84
100n C262 123K
VR42
10KAC
R296
1.5K
R291
1.5K
C30
100P
R85
10K
R106
10K
R111 10K
C57
20P
C215
47/25V
R204
6K8
C214
183K
C216
183K
R170
910
R190
910
R221
6K8
C263
333K
R210
10K
C73 20P
C286
333K
C287
47/25V
C130
20P
R254 1M
C289
220/4V
VR22
503KB
VR9
503KB
VR22
503KB
R109
10K
C111 123K
C134 100n
C283
123K
R217
6K8
C213 183K
C216
183K
R162
910
R206
6K8
R188 560
C83 100n
C212
47/25V
R125
20K
C76 20P
R183
910
C97 100P
S R T
TS RS
J12 LINE 5/6
-
+
IC5B
NJM4580M
6 5
8
7
-
+
IC25B
NJM4580M
6 5
8
7
C303
220/4V
C288
47/25V
C132
20P
-
+
IC25A
NJM4580M
2 3
4
1
R260 1M
C284 333K C285
333K
R236 10K
S R T
TS RS
J16 LINE 5/6
R99
10K
R91 10K
R112 10K
R133 15K
VR48
10KB
C157 20P
R343 15K
R336 4K7
-
+
IC30A
NJM4580M
2 3
4
1
C151
100n
C302
220/4V
C152 20P
R337
4K7
C44
100P
C62 20P
-
+
IC5A
NJM4580M
2 3
4
1
R119 2K2
R144
2K2
R185
560
C304
220/4V
-
+
IC30B
NJM4580M
6 5
8
7
C163
100n
C69
330
D5
BAV-21-TFK
R366
825
R102
510
BUS R BUS L
BUS R BUS L
BUS R BUS L
+48V
V+15
V-15
V+5
AC17.5V AC17.5V
AUX A AUX B
AUX A AUX B

8 8
7 7
6 6
5 5
4 4
3 3
2 2
1 1
D D C C B B A A
L OUT 2-TARCK
MAIN +OUT R MAIN +OUT L
R OUT 2-TRACK
MAIN_FADER_R
MAIN_FADER_L
STEREO AUX RETURN B
CH/L CH/R
From DAC OUTPUT
CLIP
SIGNAL
1
2
3
4 5
6 7
8 9
10 11
12
13
14
LM339
TO:MICON/DSP PCB IC14
IC14
IC14 IC14
V+15 V-15
1 3 3 1
2TK L-IN
R
ON OFF OFF
ON
2
3 3
2
1
2
3
2 3AUX 1
AUX 1
XA1/XA1OUT.SCH XA1 OUTPUT CIRCUIT DIAGRAM
YH HORNG ELECTRONIC CO., LTD.
A2
11Tuesday, November 18, 2003
Title Size Document Number Rev Date: Sheet of
1
2 2
L
1 1
V-15
V+15
V+15
V+15V-15
V+15
+15V
V-15
V-15
V-15 V+15
V-15
V+15
+15V
V+15
-15V
V-15
V+15
V-15
V-15
V+15
V+15
V+5
V-15
V-15
V+15
-15V
V-15
V-15
V+5
R61 120
S R T
TS RS
J19 CTRL_R_OUT
C24 20P
R34 5K1
-
+
IC35A
NJM4580L
2 3
4
1
-
+
IC35B
NJM4580L
6 5
8
7R18
120
C51 100n
C43 100n
R43
120
-
+
IC34A
NJM4580L
2 3
4
1
R16
120
C37 20P
-
+
IC34B
NJM4580L
6 5
8
7
R57 5K1
R58
10K
C199
47/25V
C179
47/25V
C46 CC
C40 10P
R59 4K7
R62
2K
VR51
10KB
C315
47/25V
R97
4K7
-
+
IC4B
NJM4580E
6 5
8
7
R56 5K1
+
-
IC5A TL084
2 3
4
1
+
-
IC15B TL084
6 5
11
7
+ -
IC15D TL084
13 12
14
+ -
IC15C
TL084
9
10
8
C88 100n
S R T
TS RS
J15 CTRL_L_OUT
R50 120
R11
120
C32 10P
R55 4K7
-
+
IC4A
NJM4580E
2 3
4
1
R54
2K
VR51
10KB
C314
47/25V
R93
4K7
S R T
TS RS
J7 PHONES_OUT
C150 100n
C75 20P
R110 15K
R109
5K1
R108
30K
C227
47/25v
C28 CC
LED7 LED
LED9 LED
LED11 LED
LED5 LED
SW6
2TKtoC_ROOM
R163
20K
S R T
TS RS
J3
AUX_SEND_A
R12
2K2
R21 2K2
C146 20P
C148
100N
C307 47/25V
C147 20P
R325 10K
R305 10K
C310 47/25V
R320 3K6
C150
100N
-
+
IC7B
NJM4580E
6 5
8
7
R319 10K
-
+
IC29A
NJM4580E 2
3
4
1
R330 10K
R318 3K6
RCA1
2TK R-IN
-
+
IC29B
NJM4580E 6
5
8
7
R209
2K7
R146 10K
C226
10uF/50V R148
6K8
R143 680
R147 56
R154
1K5
R155 1K5
LED2
GRN
R142 10K
C228
22UF/16V
C229 22UF/16V
LED3
POWER
R270 220
R258 470
R251 620 LED14 LED
LED16 LED
IC24 LM339DR
1
2
3
4
5
6
7 8
9
10
11
12
13
14
OUT1
OUT2
VCC
2IN-
2IN+
1IN-
1IN+ 3IN-
3IN+
4IN-
4IN+
GND
OUT4
OUT3
LED13 LED
LED15 LED
R269 470
R262 430 LED18 LED
LED20 LED
IC27 LM339DR
1
2
3
4
5
6
7 8
9
10
11
12
13
14
OUT1
OUT2
VCC
2IN-
2IN+
1IN-
1IN+ 3IN-
3IN+
4IN-
4IN+
GND
OUT4
OUT3
LED17 LED
LED19 LED
C184 100N
R333
100K
-
+
IC16B
NJM4580E
6 5
8
7
D2 4148 R222
100K
R212 3K6
R324
100K
-
+
IC16A
NJM4580E
2 3
4
1
C111
100N
D4 4148 C270
47UF
D1 4148 D3 4148
R220
100K
R205 3K6
C269
47UF
Q10
BC857B
R240 910
R230 7K5
R223 8K2
R238 1K3
LED10
LED
LED8 LED
LED6 LED
R23 120
R20 120
R26
120
R117
120
S R T
TS RS
J6 AUX_SEND_B
C196
47/25V
C197
47/25V
VR31
503KG
C300
47/25V
C143
100n
R293
5K1
C138 100n
C299
47/25V
VR31 503KG
R72
56K
R94
56K
R281
5K1
C144 100P
R290 30K
-
+
IC28B
NJM4558D
6 5
8
7R289
5K1
-
+
IC28A
NJM4558D
2 3
4
1
R280 30K
C141 100P
R279
5K1
LED1
RED
R259
2K4
R130
7K32
R131
7K32
R161 14K7
R158
1K
R159
1K
C108 330pF
R153 14K7
R133 7K32 R171
1K
R132
7K32
R182
1K
R187 14K7
C104
1000pF
C106 330pF
R194
910
R193
8K2
R208
1K5
R199 120
C109 330pF
R164
14K7
C105
1000pF
C110 330pF
C268
22uF/16V
R181
8K2 R180
910
R163
3K9
C267
22uF/16V
R264
2K4
Q15 BC857B
R284
100
R299
100
R307 47K
C142
100N
C107 100n
R160 120
Q9
BC857B
C145
100N
IC8
AL1101
1 2
3
4 5
67
8 9 10
11
12 13
14
15 16
INL+ INL-
AG
REF+
REF-
VDDG
FRMT
WC
DOUT
DG
AG VA
MID
INR- INR+
C230
22uF/16V
C78
100n C333
10uF/25V
R123
470
R116
470
R411 10
R98 6K04
R101
6K04
C98
330P
C99
330P
C94 100n
R114 47
C332
0.01uF
TE2
HEADER_6P
1 3 4 5 6 2
TE3
HEADER_6P
1 3 4 5 6 2
VR11
ENCODER/SW
1 2 3
4 5
R118
470
C93
100n
R129 470
C85
100n
IC9
AL1201
1 2
3
4 5
6
7 8 9
10
11
12 13
14 15 16
OUTL-
OUTL+
AG
REF+ REF-
VD
DIN FRMT WC DEM
DG
AG VA
MID
OUTR+
OUTR-
C97 100n
C149 100N
C162 100N
IC22 LM339DR
1
2
3
4
5
6
7 8
9
10
11
12
13
14
OUT1
OUT2
VCC
2IN-
2IN+
1IN-
1IN+ 3IN-
3IN+
4IN-
4IN+
GND
OUT4
OUT3
IC17 LM339DR
1
2
3
4
5
6
7 8
9
10
11
12
13
14
OUT1
OUT2
VCC
2IN-
2IN+
1IN-
1IN+ 3IN-
3IN+
4IN-
4IN+
GND
OUT4
OUT3
VR50 10KB
LED12 LED
RCA1
R335
5K1
C309
47/25V
C161 47P
R347 5K1
-
+
IC32A
NJM4580E
2 3
4
1
C156 47P R341 5K1
-
+
IC32B
NJM4580E
6 5
8
7
C311
47/25V
VR50 10KB
R332
10K
C312
47/25V
C13 100P
C313
47/25V
C164
100n
-
+
IC33B
NJM4580E
6 5
8
7
R340 27K
C155 20P
C153
100n
-
+
IC33A
NJM4580E
2 3
4
1
R342 27K
C160 20P
R334
5K1
R331
10K
S R T
TS RS
J5
R24 10K
C20 20P
R25
10K
-
+
IC2B
NJM4580E
6 5
8
7
R45 10K
C27 20P
R19 10K
R36
10K
S R T
TS RS
J18
MAIN_OUT_RCH
S R T
TS RS
J4
ST_RCH_3/4_5/6
C23
100P
C39 100n
C16 100P
C22 100P
C25
20P
R37
10K
R31 10K
C19 100P
C26 20P
R44 10K
-
+
IC2A
NJM4580E
2 3
4
1
C38
100n
SW5
2TK MIX
R450 8K2
R53 120
R49 120
S R T
TS RS
J14
MAIN_OUT_LCH
R80 120
R67 120
R13
6K2
R22
6K2
R294 8K2
C18 100P
R78 15K
-
+
IC3A
NJM4580E
2 3
4
1
R42
10K
C29 20P
R52 1K
C34 100n
R3
120
R4
120
-
+
IC3B
NJM4580E
6 5
8
7
R33 30K
C56 20P
C198
47/25V
C95 20P R124 5K6
-
+
IC7A
NJM4580E
2 3
4
1
C178
47/25V
R6
20K
C225
47/25V
C14 100n
R60
120
R32 5K1
R5
120
C21 100n
C33 100n
R35
10K
BUS R
BUS L
PHONES IN L
PHONES IN L
PHONES IN R
PHONES IN R
AUX A AUX B
BUS R BUS L