Alesis iO4 User manual

Confidential Alesis Service Manual
Alesis
iO4
[LUBA]
Service Manual
v1.0
2012.03.09
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 Alesis
ATTENTION!
THIS DOCUMENT CONTAINS SENSITIVE
PROPRIETARY INFORMATION.
ALL RECIPIENTS MUST HAVE A CURRENT
NON-DISCLOSURE AGREEMENT ON FILE
WITH ALESIS.
DO NOT MAKE ILLEGAL
COPIES OF THIS DOCUMENT

Confidential Alesis Service Manual
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
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
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
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.

TOP PANEL FEATURES
TOP PANEL FEATURESTOP PANEL FEATURES
TOP PANEL FEATURES
1. MIC INPUT – Connect a microphone to this
input with an XLR cable.
2. GUITAR / LINE INPUT –Connect a line-level
device or guitar to this input with a 1/4" cable.
3. INSERT – The insert jack allows you to insert a
compressor, EQ, or any other signal processor in
between the iO4's preamplifier and A/D converter.
4. GAIN – Adjusts the channel audio gain level.
5. MIC/LINE/GUITAR SWITCH –When this switch
is in the "GUITAR" position, the channel will serve
as a highimpedance input for connecting guitar or
bass instruments. When the switch is in the "MIC/LINE"
position, the channel will accept mic or line-level signals.
6.
6. 6.
6. USB LED –
––
– Lights up when a USB connection has
been established with your computer.
7. MIDI IN LED – Flashes whenever MIDI data is received
from an external MIDI device.
8. MIDI OUT LED – Flashes whenever MIDI data is sent
out of the iO4.
9. POWER LED – Lights up when unit is powered on.
10. MONO / STEREO – Adjusts the headphone mix and
main mix for mono or stereo operation.
11. MONITOR MIX – Blend in any amount of zero-latency
signal from your inputs with the output of your computer.
12. PHANTOM POWER SWITCH – Individual toggle
switches activate and deactivate phantom power for
channels 1+2 and channels 3+4. When activated,
phantom power supplies +48V to the XLR mic inputs.
Please note that most dynamic microphones do not
require phantom power, while most condenser
microphones do. Consult your microphone's
documentation to find out whether it needs phantom
power.
13. PHANTOM POWER LED – Lights up when phantom
power is engaged.
14. MAIN VOLUME – Adjusts the signal volume going to
the MAIN OUTPUTS.
15. CHANNEL 1/2 VOLUME METER – Displays the signal
level for input channels 1 and 2.
16. CHANNEL 3/4 VOLUME METER – Displays the signal
level for input channels 3 and 4.
17. HEADPHONE VOLUME – Adjusts the volume level of
the headphone output.
18. HEADPHONE MONITOR MIX – Adjust this switch to
monitor the USB OUTPUT (channels 1 and 2),USB
OUTPUT (channels 3 and 4), or the direct mix of 4 input
channels:channels 1 and 3 in the left headphone output
and channels 2 and 4 in the right headphone output and
the USB output.
REAR PANEL FEATURES
REAR PANEL FEATURESREAR PANEL FEATURES
REAR PANEL FEATURES
19. HEADPHONES – Connect your 1/4" headphones to
this output.
20. OUTPUTS – Use standard 1/4" cables to connect these
outputs to a mixer, speakers, or an amplifier system.
The level of these outputs is controlled by the MAIN
VOLUME knob.
21. MIDI OUT – Use a standard five-pin MIDI cable to
connect this output to the MIDI IN of an external MIDI
device.
22. MIDI IN – Use a standard five-pin MIDI cable to connect
this input to the MIDI OUT of an external MIDI device.
23. 16/24 BIT MODE – When the switch is set to 24 bit, you
can use inputs 1-2 and outputs 1-2. When the switch is
set to 16 bit, you can use channel inputs 1-4 and outputs
1-4.
24. USB PORT – Use the included USB cable to connect
the iO4 to a computer. iO4 requires a USB 2.0
connection. Note that the iO4 is not USB bus powered.
25. POWER CONNECTOR – Plug the included AC adapter
here (6v DC 1A)
26. POWER SWITCH – Turns the iO4's on/off.
SYSTEM REQUIREMENTS
SYSTEM REQUIREMENTSSYSTEM REQUIREMENTS
SYSTEM REQUIREMENTS
S
SS
SPECIFICATIONS
PECIFICATIONSPECIFICATIONS
PECIFICATIONS
SAMPLE RATE: 44.1/48k
BIT RATE: 16/24 bit
POWER SUPPLY: 6V DC, 1A
DIMENSIONS (L x W x H): 8.75" x 6" x 1.6"
(222.3mm x 152.3mm x 39mm)
WEIGHT: 1.1lbs(0.50kg)
SERVICE MANUAL
MODEL: iO4

DISASSEMBLY PROCEDURES
1. DISASSEMBLE THE CABIET(Fig1)
(A)REMOVE 5 NUTS AND 5 WASHERS OF THE BACK PAEL 。
(B)REMOVE 5 SCREWS OF THE BOTTOM CHASSIS 。
(Fig1)

2.DISASSEMBLE THE MAIN PCB ASSEMBLY . (Fig.2)
(A)REMOVE 8 SCREWS 。
(B)REMOVE 8 NUTS AND 8 WASHER FROM THE TOP PANEL 。
(C)REMOVE 7 KNOB FROM THE TOP PANEL 。
(D)REMOVE 7 NUTS AND 7 WASHERS FROM THE TOP PANEL 。
(Fig.2)

EXPLODE DIAGRAM
LUBAALE01/02/03/04/07
SEQUENCE NO OF EXPLODE DIAGRAM WILL BE MARKED ON REF. COLUMN OF BOM LIST

PACKING DIAGRAM
LUBAALE01/02/07

PACKING DIAGRAM
LUBAALE03/04

LEVEL
P/N DESCRIPTION QTY REF
1 PT133001701 Panel-Printing(Painting) 1 1
2 PT1330017 Panel 1
1 PT1310613601 KNOB electroplate 7 2
2 PT13106136 KNOB 7
1 PT1510643 ALPHA Knob 1 4
1 PT133032701 Bottom Plate(Painting) 1 5
2 PT1330327 Bottom Plate 1
1 SC0308PBNI Screw M3x8 PBN TAPPING 13 6
1 AL9-23-0023 RUBBER FOOT 4 7
1 AA812440J PW122X160X050STL 5 8
1 PT13106140 Light Pipe 5 9
1 PT13106141 Light Pipe(Signle) 2 10
1 AL4-71-0016 Cable USB RF Choke 2.0 1
1 AL9-63-0050 DVDVD Cubase LE5 V5.1.1 1
1 LAC53ALE112 Safety Label 1
1 LAC62ALE261 Bar Code Label 0.25
1 LAC67YAH261 Label φ8mm Green 0.25
1 LAP67YAH255 Sticker φ10mm red 3
1 PLUBAALE01 Pack Assembly 1
2 AL7-51-0154-O Safety Manual 1
2 AL7-51-0372-D Q'Start Guide 1
2 AL7-91-1002 Gel Silica 1
2 CB513N060 Separate Wall 0.5
2 CGLUBA310ALE01 Inner Box 1
2 CTLUBA513ALE01 Carton 0.25
2 LAC22ALE260 Serial Bar Code Label 1
2 PE150350BO Poly Bag 150*350mm 1
2 PLLUBA01 Polyfoam(Left) 1
2 PLLUBA02 Polyfoam(Right) 1
2 SD28024000 Soft Sheet 1
2 SD550410 Soft Sheet 550X410 0.75
1 SPSA13810606W2 Switch ADAPTOR 6V 1A USA/JIS 1
1TWPC10A01501 Main PCB Assembly 1
2 AL0-09-0046 POTENTIOMETER ROTARY 10KA*2 25 2 P3,6
2AL0-09-0047 VARIABLE RESISTOR 1 P4
2 AL0-17-0101 RES ARRAY 4X100 1/10W 0603 1 R19
2AL0-17-0102 RES ARRAY 4X1K 4 R364,365,375,376
2 AL0-17-0470 RES Array 4X47 1/10W 0603 1 R49
2AL1-07-0224 Capacitor Electrolytic 2200uF/ 4 C50,63,173,195
2 AL1-12-0472 Capacitor Electrolytic 47uF/63 11 C11,17,22,23,32,33,162,178,179,200,201
2AL2-01-5822 DIODE IN5822 1 D51
2 AL2-50-4149 Diode Single 1N4148 100V 200mA 2 D13,25
2AL2-51-4401 Transistor 2N4401 NPN SOT-23 ( 9 Q4,12,13,16,17,22,32,33,35
2 AL2-51-4403 Transistor 2N4403 PNP SOT-23 9 Q5,10,11,14,15,20,21,24,25
2AL2-54-0856 Transistor BC856 PNP SOT-23 8 Q6~9,28~31
2 AL2-54-6306 Mosfet FDC6306P P-CH SSOT-6 2 U6,28
2AL2-61-7223 IC NJU7223DL1-33 3.3V TO-252 1 U1
2 AL2-65-0017 IC 1 U4
2AL2-71-3079 IC MC33079 QUAD OP-AMP SOP-14 10 U14~16,18,20,22,25,29~31
2 AL2-71-7082 IC 1 U17
LUBAALE01 BOM

2AL2-72-0339 IC LM339 ANALOG COMP SOP-14 4 U9,21,23,24
2 AL2-74-0181 IC OPTO-ISOLATOR TLP181 TRANS- 1 U2
2AL2-75-4344 IC CS4344-CZZ 24bit 192KHz Ste 2 U13,33
2 AL2-85-0403 IC TPS60403 3 U3,5,10
2AL4-00-0002 MIDI Jack 8P 90°Female 2 J4,5
2 AL4-08-0402 Con USB 4-Pin Female PC-MNT Ho 1 J1
2AL4-15-0004 CONNECTOR 4P 2.54 180° 1 J13
2 AL6-01-0012 Switch SLIDE 2P2T 1 S7
2AL6-02-0001 Switch Push 2P2T Dual Row Lock 1 S8
2 AL7-01-0048 Crystal 6MHZ 49U DIP Fundament 1 X1
2AL7-20-0078 BEAD 30Ω@100MHz 3A 0805 5 L11,12,13,14,15
2 CS101J5003NPO CCAP SMD 100pF/50V 5% 0603 NPO 15 C21,96,97,102,103,114,115,122,137,171
C172,193,194,242,244
2 CS102J5003NPO CCAP SMD 1nF/50V 5% 0603 NPO 8 C90,112,113,133,148,163,241,243
2CS104K5003X7R CCAP SMD 0.1uF/50V 10% 0603 X7 54 C1~3,6,9,10,13,16,18~20,26,30,31,34,38
C40,42,46,47,54~57,61,66,68,71,78,81
C82,110,111,129,138,147,149,156,157
C184,185,187,188,207,208,221~224,228
C229,234,236,238
2 CS105K1003X7R CCAP SMD 1uF/10V 10% 0603 X7R 15 C5,27,45,53,87,109,152,153,158~161
C225,226,230
2 CS106K0605X5R CCAP SMD 10uF/6.3V 10% 0805 X5 3 C134~136
2CS150J5003NPO CCAP SMD 15pF/50V 5% 0603 NPO 12 C7,8,105,106,117,118,191,192,211,212,217,218
2 CS180J5003NPO CCAP SMD 18pF/50V 5% 0603 NPO 5 C89,131,132,165,257
2CS222J5003NPO CCAP SMD 2200P 50V 5% 0603 2 C91,164
2 CS272J5003NPO CCAP SMD 2.7nF/50V 5% 0603 NPO 4 C107,108,233,249
2CS470J5003NPO CCAP SMD 47pF/50V 5% 0603 NPO 8 C29,74,88,104,116,130,213,214
2 CS471J5003NPO CCAP SMD 470pF/50V 5% 0603 NPO 42 C72,73,75,76,83~86,92~95,98~101,119,120
C125,126,139~146,174~177,181,182,196
C197~199,203,204,231,232
2CS475K1605X5R CCAP SMD 4.7uF/16V 10% 0805 X5 1 C80
2 DIEN1N4148WSM Diode SMD 21 D2~12,15,17~24,38
2DISDB1100SM Schottky Barrier Rectifiers Di 2 D1,14
2 EC10735TLE Capacitor Electrolytic low ESR 4 C15,28,166,167
2EC10825 Capacitor Electrolytic 1000uF/ 1 C14
2 EC47710TLE ECAP Low ESR 470uF/10V 8×12mm 2 C123,124
2ECS10616B Capacitor Electrolytic 10uF/16 4 C64,70,77,79
2 ECS10625B ECAP 10UF/25V 4*5.3MM SMD 1 C24
2ECS22616B Capacitor Electrolytic 22uF/16 41 C12,35~37,39,41,43,44,48,49,51,52,58~60
C62,65,67,69,121,127,128,150,151,180,186
C189,190,202,206,209,210,227,235,237,239
C240,245~248
2ECS47616DT Capacitor Electrolytic 47uF/16 1 C25
2 ICCS5341 IC CS5341 TSSOP-16 2 U12,32
2ICLM3578A IC LM3578A SOP-8 2 U7,27
2 ICLP2975-5.0 IC LP2975-5.0 SO-8 1 U26
2ICTUSB3200 IC TUSB3200 USB Streaming Cont 1 U8
2 ICYH99M11 IC(AL2-69-2464+Program)SOIC-8 1 U11
2AL2-69-2464 IC 1 (U11)
2 JK5031 XLR Base 4 J6,7,21,24
2JK6314-02-340 6.4φPhone JACK 4P 90° 5 J16,18,19,31,32
2 JK6CKX63508 6.4φPhone Jack 5P 180°Fema 8 J8~11,22,23,25,26
2JKDJ-0702B-020 DC Base 2.0MM 1 J17
2 LDC191TBKT-5A Liquid-emitting Diode Blue SMD 1 D50
2LDKPHK-1608CGCK LED GREEN SMD 0603 13 D27,29,30,32,34~37,42,44,45,47,49
2 LDKPHK-1608SURCK Liquid-emitting Diode RED SMD 4 D28,31,43,46
2LDKPHK-1608SYCK LED YELLOW SMD 0603 4 D26,33,41,48

2 PC10A015 Main PCB 4 Layer FR-4 1.6T 140 1 -
2PT1304702 PLATE 1 (J5)
2 RS000004J06 RES 0Ω5% SMD 1206 2 R26,27
2RS000010J03 RES 0Ω5% SMD 0603 35 R2,160~164,167~179,212,217,219
R299~310,317
2RS000110J03 RES 1Ω5% SMD 0603 11 R33~35,84,88,143,202,203,206,329,336
2 RS001K10F03 RES 1K 1% SMD 0603 38 R9,15,16,72,73,93,94,100,101,112,113,135
R138,146,151,154,166,182,186,187,191,194
R195,200,201,208~211,216,218,220,228,229
R251,252,256,257
2 RS002K10F03 RES 2K 1% SMD 0603 9 R21,60,64,76,80,225,226,253,254
2RS003310F03 RES 33Ω1% SMD 0603 3 R130,183,272
2 RS004710F03 RES 47Ω1% SMD 0603 4 R142,145,189,190
2RS010008F05 RES 100Ω1% SMD 0805 8 R54~57,291~294
2 RS010010F03 RES 100Ω1% SMD 0603 14 R3~6,66,70,82,107,118,236,248,264
R276,337
2 RS010K10F03 RES 10K 1% SMD 0603 23 R20,32,83,139,140,165,188,197,199
R204,215,320,351,352,354,355~359
R361,362,374
2RS013K10F03 RES 13K 1% SMD 0603 4 R117,122,240,268
2 RS015K10F03 RES 15K 1% SMD 0603 16 R40~47,234,235,262,263,281~284
2RS01K510F03 RES 1.5K 1% SMD 0603 3 R24,224,339
2 RS01K610F03 RES 1.6K 1% SMD 0603 4 R120,213,238,266
2RS020K10F03 RES 20K 1% SMD 0603 1 R22
2 RS022010F03 RES 220Ω1% SMD 0603 1 R18
2RS033010F03 RES 330Ω1% SMD 0603 5 R23,61,77,227,255
2 RS03R310J03 RES 3.3Ω5% SMD 0603 1 R144
2RS047K10F03 RES 47K 1% SMD 0603 14 R11,13,17,50~53,115,277~280,314,315
2 RS05K110F03 RES 5.1K 1% SMD 0603 5 R133,147,148,149,155
2RS05R110J03 RES 5.1Ω5% SMD 0603 2 R1,319
2 RS063410F03 RES 634Ω1% SMD 0603 4 R124,125,324,328
2RS075010F03 RES 750Ω1% SMD 0603 2 R245,275
2 RS07K510F03 RES 7.5K 1% SMD 0603 16 R89~91,95,108~110,114,230~233
R258~261
2 RS100K10F03 RES 100K 1% SMD 0603 18 R36~39,48,58,69,156~159,207,237,265
R285~288
2 RS10K710F03 RES 10.7K 1% SMD 0603 4 R103,106,331,334
2RS18R210F03 RES 18.2Ω1% SMD 0603 4 R87,102,289,290
2 RS22K110F03 RES 22.1K 1% SMD 0603 2 R196,198
2RS27R410F03 RES 27.4Ω1% SMD 0603 2 R28,29
2 RS2K0510F03 RES 2.05K 1% SMD 0603 2 R223,340
2RS2K7410F03 RES 2.74K 1% SMD 0603 2 R244,338
2 RS30K110F03 RES 30.1K 1% SMD 0603 2 R214,341
2RS31K610F03 RES 31.6K 1% SMD 0603 2 R181,184
2 RS33K210F03 RES 33.2K 1% SMD 0603 8 R126~129,321,322,325,326
2RS3K0910F03 RES 3.09K 1% SMD 0603 1 R30
2 RS3K3210F03 RES 3.32K 1% SMD 0603 10 R92,111,116,121,180,185,239,241,267,269
2RS3K9210F03 RES 3.92K 1% SMD 0603 8 R62,63,78,79,221,222,249,250
2 RS47K510F03 RES 47.5K 1% SMD 0603 8 R71,74,96,97,134,137,150,153
2RS48K710F03 RES 48.7K 1% SMD 0603 8 R59,65,75,81,242,243,270,271
2 RS4K1210F03 RES 4.12K 1% SMD 0603 4 R98,99,330,333
2RS4K9910F03 RES 4.99K 1% SMD 0603 2 R360,363
2 RS510K10F03 RES 510K 1% SMD 0603 2 R31,205
2RS6K1910F03 RES 6.19K 1% SMD 0603 8 R67,68,85,86,131,136,141,152
2 RS7K1510F03 RES 7.15K 1% SMD 0603 4 R10,12,14,25
2RS90R910F03 RES 90.9Ω1% SMD 0603 4 R119,123,323,327
2 RS9K5310F03 RES 9.53K 1% SMD 0603 4 R104,105,332,335

2RSN0470104J03 RES NETWORK 470Ω5% 1/10W SMD 1 R132
2 SWSKD22 Switch slide 2P2T 10MM 7 S1~6,9
2SWSSV-23D09N-G6 Switch Slide 2P3T 1 SW13
2 TR2SD2114KSM Transistor 2SD2114K NPN SOT-23 6 Q1,2,18,19,23,26
2TRFDD4685 MOSFET FDD4685 P-CH TO-252 1 Q36
2 UHFS4W1010-331K Capacitor 330UH 2 L1,2
2VRR50202502 VARIABLE RESISTANCE 4 P1,2,9,10

1 1
2
2
3 3
4
4
5
5
6 6
D D
C C
B B
AA
USB
MIDI PORTS
NC NC
N/C
MIDI OUT
NC NC
MIDI IN
POWER CONTROL
N/C
-5V
+5V
+3.3V
+50V_A
+6V
NC
NC
NC
NC
SERIAL EEPROM
CodecReset changed from AH to AL
N/C
+50V_B
DCPOWER TIP +
V_IN
MPU
POWER RAIL MUTE CONTROL
SUBMIT PART
SUBMIT PART
I2C ProgrammingHeader
Bit RateSelector
PHANTOM PWR
USB ACTIVI TY
MIDI I N
INDICATOR LEDS
MIDI OUT
NC
PHANTOM PWR
PHANTOM POWER ENABLE CH 1/2-3/4
NC
MUTING LEVEL
MCU+POWER_CH1&2-20120213.SchDoc
9-79-0536-A-0
MS/PM/JK/CB
9-40-0536-A
2012/2/13
ALESIS
LUBA Main PCB
ASSY NUMBER:
1
23
45
6
D
C B A
C
D B A
COMPANY:
TITLE:
PART NUMBER:
FILENAME:
SCALE:
RELEASED: DRAWN: DATED:
DATED:
SIZE:
SHEET: OF 6
1
C
0.1uFC10
0.1uF C1
MIDI
1
2
3
45
6
7 8 J4
470pF
C75
470pF
C76
TLP181
AL2-74-0181
1 2 3
4
U2
MBT4401
Q4
470pF
C73
470pF
C72
MIDI
1
2
3
45
6 7 8 J5
+VBUS 1
D- 2
D+ 3
GND 4
56
J1
1N4148
D2
100
78R19D
100
56R19C
100
3 4R19B
100
12
R19A
220
R18
74LVC1G17
24 U4A
74LVC1G17
3 5
U4B
2.00k 1%
R21
330 ohm
R23
0.1uF
C3
0.1uF
C9
22uF,16V_DNS
C4
TPS60403
OUT 1
IN
2
3
GND
4
5
CFLY- CFLY+
U10
1uFC27
1.0 ohm
R33
1.0 ohmR34
47uF,63V
C17
330uH
24
L1
10.0k 1%
R32
1.0 ohmR35
LM3578A
IN-
1
IN+
2
OSC
3
4
E5
C6
ILIM 7
8
VIN
GND
U7
2200pF
C91
18pF
C89
FDC6306P
1
6 5
DS
G
U6A
100uF,35V
C15
FDC6306P
3
4 2
DS
G
U6B
0 ohm
R2
0.1uF C2
100uF,35V
C28
0 ohm
R161
0 ohmR162
0 ohm
R163
0 ohm
R164
0 ohm R179
0.1uF
C13
0.1uF
C16
0.1uFC18 0.1uF
C19
0.1uF
C81
0.1uF
C82
10K R20
20K
R22
1.5K
R24
47pF
C88
27.4 ohm 1%
R28
27.4 ohm 1%
R29
47pF
C130
18pF
C131
18pF C132
3.09k 1%
R30
1000pF
C133
BLM21PG300SN1
L11
47 ohm1
2R49A
47 ohm3
4
R49B
47 ohm
5
6R49C
47 ohm
78R49D
47 ohmR142
10uF
C134
1.0 ohm
R143
3.3 ohm
R144
10uF C135
10uF
C136
47 ohm
R145
5.1k
R147
100pF
C137
24C64
A0 1 A1 2
A2 3
VSS
4VCC 8
WP
7
SCL 6
SDA
5
U11
5.1k R148
0.1uFC138
5.1k
R149
47 ohm
R189
47 ohm
R190
1.0 ohmR202 1.0 ohm
R203
47uF,63V
C162
330uH
24
L2
10.0k 1%
R204
1.0 ohmR206
LM3578A
IN-
1
IN+
2
OSC
3
4
E5
C6
ILIM 7
8
VIN GND
U27
2200pF
C164
18pF
C165
FDC6306P
1
6 5
DS
G
U28A
100uF,35V
C166
FDC6306P
3
4 2
DS
G
U28B
TPS60403
OUT 1
IN
2
3
GND
4
5
CFLY- CFLY+
U3
1uF
C5
47uF,63V
C11
0.1uF
C20
0.1uF
C6
P3
1 3 2
J17 0 ohmR26
MBT4403
Q5
MMBD4148
31
D13
MMBD4148
31
D25
C24
10UF_25V
47K
R314
47K
R315
5.1k R155
1N5822
AL2-01-5822
D51
5.1k R133
ICLP2975-5.0
ON/OFF
1
FEEDBACK
2
COMP
3
GND
4
GATE 5
NC
6
C-LIM 7
INPUT 8
U26 CMB_LP2975
18pF
C257
D34
GRN
D36
GRN
1
2
3
4
5
6
S3
D37
GRN
10.0k 1%
R357
1
2
3
4
5
6
S9
D49
GRN
10.0k 1%
R374
D35
GRN
1 2 3
4
J13
1000uF,25V
C14
1uF
C152
1uF
C153
1uF
C158
1uFC159
TPS60403
OUT 1
IN
2
3
GND
4
5
CFLY- CFLY+U5
1uFC160
1uFC161
100uF,35V
C167
1
2
3S7
470 OHM
1 2
R132A
470 OHM
3 4
R132B
470 OHM
5 6
R132C
470 OHM
7 8
R132D
1k
R201
DGND
DGND
DGND
+3.3V
+3.3V
DGND
DGND
DGND
+3.3V
DGND
DGND
+3.3V
+6V
PGND
+50V_A
PGND
PGND
PGND
PHANTOM_PWR_EN_1/2
DGND
+5V
AGND
+3.3VA
+3.3V
DGND
DGND
DGND
ENUM_STATUS
DGND
DGND AGND
SDOUT1
SDOUT2 BCLK
LRCLK MCLK
DGND
SDIN2
SDIN1
DGND
AGND
DGND
+3.3V
DGND
CODEC_RESET
MIDI_IN_LED_EN
MIDI_OUT_LED_EN
+50V_B
PGND
PGND
PGND
PHANTOM_PWR_EN_3/4
+6V
PGND PGND
+5V
PGND
PGND
+6V
PGND
PGND
-5V
+3.3V
PGND
PGND
PGND
DGND
+6V
PGND
+6V
PHANTOM_PWR_EN_1/2
MIDI_IN_LED_EN
MIDI_O UT_LED_EN
PGND
PHANTOM_PWR_EN_3/4
ENUM_STATU S
AGND
+3.3V
DGND
PGND
MUTE_DRIVER
-5V
PGND
DGND
1
2
3
S8
PLLFILO
1
2
PWMO
3
PLLO 4
5
PUR
6
DP
7
DM
8
9
MRESET
10
TEST
11 EXTEN 12
RSTO
13
P3
14 P3
15
16
XINT
17 P3 18 P3 19 P3
20
21
NC
22
PLLOEN 23
P1 24 P1 25
P1 26
27
P1 28
P1 29 P1 30 P1 31
P1 32
33
CSCLK 34
CSYNC 35
CDATO 36
37
CDATI 38
CRESET 39
CSCHNE 40
SDA 41
SCL 42
43
MCLKO 44
MCLKO2 45
46
MCLKI 47
MCLKI2 48
49
XTALO
50
XTALI
51
PLLFILI
52
TUSB3200ACPAH
DGND AGND
DVDD DVDDS AVDD U8
6 MHz X1
22uF,16V
C12
1000pF
C90
1000pF C163
0 ohm
R160
0 ohm
R27
100k 1%
R48
100k 1%
R207
510k R31
510k R205
47uF,16V
C25
0 ohm_DNS
R246
0 ohm_DNS
R247
B1100
D14
B1100 D1
1
2 3
DS
G
Q36 CMB_FDD4685
OUT 1
IN
2
3
GND U1
1k
R9
1k R15
1kR146
1uF
C87
AGND DGND
BLM21PG300SN1
L14
BLM21PG300SN1
L15
PGND AGND DGND
BLM21PG300SN1_DNS
L12
BLM21PG300SN1_DNS
L13
D50
BLUE
POWER LED

1 1
2
2
3 3
4
4
5
5
6 6
D D
C C
BB
AA
1/4" INPUT
XLR INPUT CH1 INSERT
CH1 INPUTS
1/4" INPUT
XLR INPUT CH2 INSERT
CH2 INPUTS
INVERTINGI NPUT NON-INVERTINGI NPUT
INVERTINGI NPUT NON-INVERTINGI NPUT
CH1 GAIN
CH2 GAIN
CH1 GUITAR INPUT ENABLE CH2 GUITAR INPUT ENABLE
MS/PM/JK/CB 2012/2/13
ASSY NUMBER:
1
23
4
56
D
C B A
C
D
B A
COMPANY: TITLE:
PART NUMBER:
FILENAME:
SCALE:
RELEASED: DRAWN: DATED:
DATED:
SIZE:
SHEET: OF 62
INPUTS_CH1-2-20120213.SchDoc C
9-79-0536-A-0
9-40-0536-A
LUBA Main PCB
ALESIS
MBT4403
Q11
MBT4403
Q10
100pF
C96
100pF
C97
3.92k 1%
R62
3.92k 1% R63
6.19k 1% R67
6.19k 1%
R68
2.00k 1%
R60
2.00k 1%
R64
330 ohm
R61
1.00k 1%
R94
1.00k 1%
R93
7.50k
R95
7.50k
R89 7.50kR91
7.50kR90
MC33079
+
10
-
9
8
U14C
MC33079 +12
-13
14 U14D
411
VCC
VEE
U14E
2200uF,6.3V
C50
S1
T2
R3
J6
470pF
C94
470pF C101
470pF C85
470pF
C86
15.0k 1%
R43
15.0k 1%
R42
47uF,63V
C33 47uF,63V C32 22uF,16V
C39
470pF C100
470pF
C95
100 ohm
R70
100k 1% R69
0.1uF C61
0.1uF C66
1N4148 D11
3.32k 1%
R116
22uF,16V
C62
3.32k 1%R92
0.1uF
C31
0.1uF
C34
22uF,16V
C35
22uF,16VC36
48.7k 1%
R65
48.7k 1%R59
MBT4401
Q13
47.5k 1%
R74
MBT4401
Q12
47.5k 1%
R71
1.00k 1%
R72 1.00k 1%
R73
MC33079
+
5
-
6
7
U14B
MC33079
+
3
-
2
1
U14A
15pF
C106
15pF
C105
100 ohm
R107
MBT4403
Q15
MBT4403
Q14
100pF
C102
100pF
C103
3.92k 1% R78
3.92k 1%
R79
6.19k 1%
R85
6.19k 1%
R86
2.00k 1% R76
2.00k 1%
R80
330 ohm
R77
1.00k 1%
R113
1.00k 1%
R112
7.50k
R114
7.50k
R108 7.50k
R110
7.50kR109
MC33079
+
10
-
9
8
U16C
MC33079 +12
-13
14 U16D
2200uF,6.3V
C63
S1
T2
R3
J7
470pF
C93
470pF C99
470pF
C83
470pF
C84
15.0k 1%
R41
15.0k 1%
R40
47uF,63V
C23
47uF,63V
C22 22uF,16V
C37
470pF C92
470pF C98
100 ohm
R66
100k 1% R58
1N4148
D38
3.32k 1%
R121
22uF,16V
C65
3.32k 1%R111
0.1uF
C40
0.1uF
C42
22uF,16VC43
22uF,16V
C44
48.7k 1%
R81
48.7k 1%R75
MBT4401
Q17
47.5k 1%
R97
MBT4401
Q16
47.5k 1%
R96
1.00k 1%
R100
1.00k 1%
R101
MC33079
+
5
-
6
7
U16B
MC33079
+
3
-
2
1
U16A
15pF
C118
15pF
C117
100 ohm
R118
411
VCC VEE
U16E
BC856
Q9
BC856
Q8
BC856 Q7
BC856
Q6
47k
R53
47k
R52
47k
R51
47k
R50
15.0k 1%
R47
15.0k 1%
R46
15.0k 1%
R45
15.0k 1%
R44
100k 1%
R39
100k 1%
R38
100k 1%
R37
100k 1%
R36
18.2 ohm 1%
R87
18.2 ohm 1%
R102
47pF
C104
47pFC116
1N4148
D8
1N4148
D5
1N4148
D7
1N4148
D6
1N4148
D4
1N4148
D3
1N4148
D10
1N4148
D9
0 ohmR167 0 ohm
R168
0 ohm
R169
0 ohmR170
0 ohm
R171
0 ohm
R172
0 ohm
R173
0 ohmR174
0 ohmR175
0 ohmR176
0 ohm
R177
0 ohmR178
100 ohm
R3
100 ohm
R4
5KC
1
2
3
P1 5KC
1
2
3
P2
1
2
3
4
5
6
S1
1
2
3
4
5
6
S2
10.0k 1%
R351
10.0k 1%
R356
+5V
+50V_A
+5V
-5V
-5V
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
CH1_ADC_IN
+5V
-5V
CH2_PEAK
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
CH2_ADC_IN
+50V_A
+5V
+5V
AGND AGND
+5V
-5V
+5V
-5V
AGND
CH1_PEAK
AGND
+5V
+5V
-5V -5V
AGND AGND
1.60k 1%
R213
10uF,16V
C64
47k
R115
13.0k 1%
R117
1.60k 1%
R120
47k R11
10uF,16V
C70
13.0k 1%
R122
7.15k ohm 1%
R10 7.15k ohm 1% R12
High : Guitar Low : MIC/Line
High : Guitar
Low : MIC/Line
1 2 3 4
5
J8
1 2
3 4
5
J9
1
2 3 4
5
J10
1 2
3
4
5
J11
100 ohm
R55 100 ohm
R56 100 ohm
R54
100 ohm
R57

1 1
2
2
3 3
4
4
5
5
6 6
D D
C C
B B
AA
1/4" INPUT
XLR INPUT CH3 INSERT
CH3 INPUTS
1/4" INPUT
XLR INPUT CH4 INSERT
CH4 INPUTS
INVERTINGI NPUT NON-INVERTINGI NPUT INVERTINGI NPUT NON-INVERTINGI NPUT
CH3 GAIN
CH4 GAIN
CH3 GUITAR INPUT ENABLE
CH4 GUITAR INPUT ENABLE
ALESIS
LUBA Main PCB
9-40-0536-A
9-79-0536-A-0
C
INPUTS_CH3-4-20120213.SchDoc
3 6
OFSHEET:
SIZE:
DATED:
DATED:DRAWN:
RELEASED:
SCALE:
FILENAME: PART NUMBER:
TITLE:
COMPANY:
A
B
D C
A
B C
D
65 4 3 2 1
ASSY NUMBER:
2012/2/13
MS/PM/JK/CB
MBT4403
Q20
MBT4403
Q21
100pF
C171
100pF
C172
3.92k 1%
R221
3.92k 1%
R222
2.00k 1% R225
2.00k 1%
R226
330 ohm
R227
1.00k 1%
R228
1.00k 1%
R229
7.50k
R230
7.50k
R231 7.50kR232
7.50k
R233
MC33079
+
10
-
9
8
U29C
MC33079 +12
-13
14 U29D
411
VCC VEE
U29E
2200uF,6.3V
C173
S1
T2
R3
J21
470pF
C174
470pF
C175
470pF
C176
470pF
C177
15.0k 1%
R234
15.0k 1%
R235
47uF,63V
C178
47uF,63V
C179 22uF,16V
C180
470pF
C181
470pF C182
100 ohm
R236
100k 1% R237
0.1uF C184
0.1uF C185
1N4148
D15
3.32k 1%
R239
22uF,16V
C186
3.32k 1%
R241
0.1uF
C187
0.1uF
C188
22uF,16VC189 22uF,16V
C190
48.7k 1%
R242
48.7k 1%
R243
MC33079
+
5
-
6
7
U29B
MC33079
+
3
-
2
1
U29A
15pF
C191
15pF C192
100 ohm
R248
MBT4403
Q24
MBT4403
Q25
100pF
C193
100pF
C194
3.92k 1%
R249 3.92k 1%
R250
2.00k 1%
R253
2.00k 1%
R254
330 ohm
R255
1.00k 1%
R256
1.00k 1%R257
7.50k
R258
7.50k
R259 7.50kR260
7.50kR261
MC33079
+
10
-
9
8
U30C
MC33079 +12
-13
14 U30D
2200uF,6.3V
C195
S1
T2
R3
J24
470pF
C196
470pF
C197
470pF C198
470pF
C199
15.0k 1%
R262
15.0k 1%
R263
47uF,63V
C200 47uF,63V
C201 22uF,16V
C202
470pF
C203
470pF C204
100 ohm
R264
100k 1% R265
1N4148
D12
3.32k 1%
R267
22uF,16V
C206
3.32k 1%
R269
0.1uF
C207
0.1uF
C208
48.7k 1%R270 48.7k 1%
R271
MC33079
+
5
-
6
7
U30B
MC33079
+
3
-
2
1
U30A
15pFC211
15pF
C212
100 ohm
R276
411
VCC VEE
U30E
BC856
Q28
BC856
Q29
BC856 Q30
BC856
Q31
47k R277
47k
R278
47k
R279
47k
R280
15.0k 1%
R281
15.0k 1% R282
15.0k 1%
R283
15.0k 1% R284
100k 1%
R285
100k 1%
R286
100k 1%
R287
100k 1%
R288
18.2 ohm 1%
R289
18.2 ohm 1%
R290
47pF
C213
47pFC214
1N4148
D17
1N4148
D18
1N4148
D19
1N4148
D20
1N4148
D21
1N4148
D22
1N4148
D23
1N4148
D24
0 ohm
R299
0 ohmR300
0 ohm
R301
0 ohmR302
0 ohmR303 0 ohmR304
0 ohmR305 0 ohmR306
0 ohmR307
0 ohmR308
0 ohm
R309
0 ohm
R310
100 ohm
R5
100 ohm
R6
6.19k 1%
R131
MBT4401
Q22
47.5k 1%
R134
1.00k 1% R135
6.19k 1%
R136
MBT4401
Q32
47.5k 1%
R137
1.00k 1%
R138
6.19k 1%
R141
MBT4401
Q33
47.5k 1%
R150
1.00k 1%
R151
6.19k 1%
R152
MBT4401
Q35
47.5k 1%
R153
1.00k 1% R154
5KC
1
2
3
P9
5KC
1
2
3
P10
1
2
3
4
5
6
S4
1
2
3
4
5
6
S6
10.0k 1%
R139
10.0k 1%
R140
+5V
+50V_B
+5V
-5V
-5V
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
+5V
-5V
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
+50V_B
+5V +5V
AGND
AGND
+5V
-5V
+5V
-5V
CH3_ADC_IN
CH4_ADC_IN
AGND
CH4_PEAK
CH3_PEAK
AGND
AGND
AGND
AGND
AGND
+5V
+5V
-5V
-5V
22uF,16VC209
22uF,16VC210
AGND
AGND
1.60k 1%
R238 47K
R13
10uF,16V
C79
13.0k 1%
R240
1.60k 1% R266 47K
R17
10uF,16V
C77
13.0k 1%
R268
7.15k ohm 1%
R14
7.15k ohm 1% R25
High : Guitar
Low : MIC/Line
High : Guitar
Low : MIC/Line
1 2 3
4
5
J22
1 2
3
4
5
J23
1
2
3 4
5
J25
1 2 3
4
5
J26
100 ohm R292 100 ohm R291 100 ohm R294 100 ohm R293

1 1
2
2
3 3
4
4
5
5
6 6
D D
C C
BB
AA
ADC
ADC INPUT BUFFERS CH 1/2
M0,M1 = HIGH = SLAVE CLOCK MODE
SDOUTPULL-UP= I2SMODE
CS5341 NOTES
Recommended input buffer per CS5341 datasheet
MaxAnalog In is sameasUB0CS4265sogainshaven't beenadjus
ted
ADC
ADC INPUT BUFFERS CH 3/4
M0,M1 = HIGH = SLAVE CLOCK MODE
SDOUTPULL-UP= I2SMODE
CS5341 NOTES
Recommended input buffer per CS5341 datasheet
MaxAnalog In is sameasUB0CS4265sogainshaven't beenadjusted
ALESIS
LUBA Main PCB
9-40-0536-A
9-79-0536-A-0
C
4 6
OF
SHEET:
SIZE:
DATED:
DATED:
DRAWN:
RELEASED:
SCALE:
FILENAME: PART NUMBER: TITLE: COMPANY:
A B
D
C
A
B C
D
65 4 3 2 1
ASSY NUMBER:
2012/2/13
ADCS_CH1-2-3-4-20120213.SchDoc
MS/PM/JK/CB
CS5341
M0
1MCLK 2
3
SDOUT 4
5
6
SCLK 7
LRCK 8
RST
9
AINL
10
VQ 11
AINR
12
13
14
FILT+ 15
M1
16
GND REFGND
VA VD VL
U12
0.1uF
C47
0.1uFC46
0.1uF
C54
1uF
C53
1uF
C45
5.1 ohmR1
10.0k 1%
R83
0.1uF
C111
0.1uF
C110
1uF
C109
33.2k 1%
R126
33.2k 1%
R127
470pFC119
90.9 1%
R123
634 1%
R124
33.2k 1%
R129
33.2k 1% R128
470pF
C120
90.9 1%
R119
634 1%R125
2700pF
C108
1.0 ohm
R84
22uF,16V
C48
100 ohm
R82
22uF,16V
C69
22uF,16V
C67
MC33079
+
3
-
2
1
U15A
MC33079
+
5
-
6
7
U15B
2700pF
C107
10.0k 1%
R188
CS5341
M0
1MCLK 2
3
SDOUT 4
5
6
SCLK 7
LRCK 8
RST
9
AINL
10
VQ 11
AINR
12
13
14
FILT+ 15
M1
16
GND REFGND
VA VD VL
U32
0.1uF
C222
0.1uFC223
0.1uFC224
1uFC225
1uFC226
5.1 ohmR319
10.0k 1%
R320
22uF,16V
C227
0.1uF
C228
0.1uF
C229
1uF
C230
33.2k 1%
R321
33.2k 1%
R322
470pFC231
90.9 1%
R323
634 1%R324
33.2k 1%
R325
33.2k 1% R326
470pFC232
90.9 1%
R327
634 1%
R328
2700pF
C233
1.0 ohm
R336
100 ohmR337
22uF,16V C247 22uF,16V
C248
2700pF
C249
10.0k 1%
R352
MC33079
+
10
-
9
8
U15C
MC33079
+
12
-
13
14
U15D
411
VCC
VEE
U15E
0.1uF
C78
AGND
DGND
+3.3V
CODEC_RESET
LRCLK
BCLK
MCLK
AGND
+3.3V
AGND
+3.3V
CH1_ADC_IN CH2_ADC_IN
AGND
DGND
SDIN1
AGND
DGND
+3.3V
CODEC_RESET
LRCLK
BCLK
MCLK
AGND
+3.3V
AGND
+3.3V
AGND
DGND
CH3_ADC_IN
CH4_ADC_IN
SDIN2
+5V
-5V
22uF,16V
C60
22uF,16V
C246
DGND DGND
TP2
TP11

1 1
2
2
3 3
4
4
5
5
6 6
D D
C C
BB
AA
DAC
DAC OUTPUT BUFFERS CH 3/4
Max Output = 0.70 x 3.3VA = 2.31Vpp
Gain= +4.187dB = UB0'snon-invertinggain
2ndorder Butterworth,MFB type -3dB Cutoff = 50kHz
DIRECT USB 3
NC
DIRECT USB 4
NC
MUTING
DAC
DAC OUTPUT BUFFERS CH 1/2
Max Output =0.70 x 3.3VA = 2.31Vpp
Gain= +4.187dB = UB0'snon-invertinggain 2ndorder Butterworth,MFB type
-3dB Cutoff = 50kHz
DIRECT USB 1
NC
DIRECT USB 2
NC
MUTING
DACS_CH1-2-3-4-20120213.SchDoc
LUBA Main PCB
ALESIS
9-40-0536-A
9-79-0536-A-0
C
5 6
OFSHEET:
SIZE:
DATED:
DATED:
DRAWN:
RELEASED:
SCALE:
FILENAME: PART NUMBER:
TITLE:
COMPANY:
A
B D
C
A
B
C D
6543 2 1
ASSY NUMBER:
2012/2/13
MS/PM/JK/CB
MC33079
411
VCC VEE
U31E
0.1uF
C221
CS4344
SDIN
1
DEM/SCLK
2
LRCK
3
MCLK
4VQ 5
AOUTR 10
VA 9 GND
8
AOUTL 7
FILT+ 6
U33
0.1uF
C234
22uF,16V
C235
0.1uF
C236
22uF,16V
C237
0.1uF
C238
22uF,16V
C239
1.0 ohm R329
22uF,16V C240
4.12k 1%
R330
10.7k 1%
R331
1000pF
C241
9.53k 1%
R332
100pF
C242
4.12k 1%
R333
10.7k 1%R334
1000pF
C243
9.53k 1%
R335
100pFC244
22uF,16V C245
470pF
C143
470pF
C144
1.00k 1%
R218
JY-6314-01-340
1
2 3 4J31
0 ohm
R219
470pF
C145
470pF
C146
1.00k 1%
R220
JY-6314-01-340
1
2
3
4J32
0 ohmR317
2SD2114K
Q18
2SD2114K Q19
1.00k 1%R251
1.00k 1%
R252
CS4344
SDIN
1
DEM/SCLK
2
LRCK
3
MCLK
4VQ 5
AOUTR 10
VA 9 GND
8
AOUTL 7
FILT+ 6
U13
0.1uF
C56
22uF,16V
C59
0.1uF
C55
22uF,16V
C49
0.1uF
C57
1.0 ohm
R88
22uF,16V
C52
4.12k 1%
R98
10.7k 1%R103
1000pF
C112
9.53k 1%
R104
100pF
C114
4.12k 1%
R99
10.7k 1%
R106
1000pF
C113 9.53k 1%
R105
100pFC115
22uF,16V
C51
470pF
C139
470pF C140
1.00k 1% R211
JY-6314-01-340
1
2
3 4J18
0 ohmR212
470pF C141
470pF
C142
1.00k 1%
R216
JY-6314-01-340
1 2
3
4J19
0 ohm
R217
2SD2114K
Q23
2SD2114K
Q26
1.00k 1%
R195
1.00k 1%
R194
MC33079
+
3
-
2
1
U31A
MC33079
+
5
-
6
7
U31B
MC33079
+
10
-
9
8
U31C
MC33079
+
12
-
13
14
U31D
10KA
1
2
3
P6A 10KA
4
5
6
P6B
+3.3V
MCLK
LRCLK
BCLK
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
SDOUT2
AGND
DAC3_MONITOR
MUTE_DRIVER
DAC4_MONITOR
-5V
+5V
+3.3V
MCLK LRCLK
BCLK
AGND
AGND
AGND
AGND
AGND
AGND DGND
AGND
AGND
SDOUT1
AGND
MUTE_DRIVER
DAC1_MONITOR
DAC2_MONITOR
AGND
AGND
DIRECT_1_OUTPUT DIRECT_2_OUTPUT
22uF,16V
C58
+
3
-
2
1
MC33079 U18A
+
5
-
6
7
MC33079
U18B
1.00k 1%R191
1.00k 1%R182
+
10
-
9
8
MC33079
U18C
+
12
-
13
14
MC33079
U18D
1.00k 1% R209
1.00k 1%
R210
1.00k 1%
R16
1.00k 1%R166
411
VCC
VEE MC33079
U18E
0.1uF
C71
TP6 TP3 TP4
TP7
TP5
TP12

1 1
2
2
3 3
4
4
5
5
6 6
D D
C C
BB
AA
CH1 METERING
CH2 METERING
-20dB -6dB -3dB CLIP (-0.5dB)
MONITOR
LEVEL HEADPHONES
BALANCE
DIRECT/USB
MONO
STEREO
MONO/STEREO SELECT
CH3 METERING
CH4 METERING
-20dB -6dB -3dB CLIP (-0.5dB)
HEADPHONE DRIVE
CHANNEL SUMMING FROM XLR/MICS
MS/PM/JK/CB 2012/2/13
ASSY NUMBER:
1
23
4
5
6
D
C
B A
C
D B
A
COMPANY: TITLE:
PART NUMBER: FILENAME: SCALE:
DATED:
DATED:
SIZE:
SHEET: OF 66
C
9-79-0536-A-0
9-40-0536-A
ALESIS
LUBA Main PCB
USER_CONTROL_XLR-SUMMING-20120213.SchDoc
LM339
+
11
-
10
13
U9D
LM339
+
9
-
8
14
U9C
LM339
+
7
-
6
1
U9A
LM339
+
5
-
4
2
U9B
312
VCC
GND
U9E
0.1uF
C26
0.1uF C30
0.1uF
C38
312
VCC GND
U21E
1
2
3 4
5
6
S5
D26 YEL
D27 GRN
D28 RED
D29 GRN
D30 GRN
D31 RED
D32 GRN
D33 YEL
LM339
+
11
-
10
13
U21D
LM339
+
9
-
8
14
U21C
LM339
+
7
-
6
1
U21A
LM339
+
5
-
4
2
U21B
10KA
4
5
6
P3B
10KA
1
2
3
P3A
22uF,16V
C41
22uF,16V
C121 22uF,16V
C127
22uF,16V
C128
10KB
4
5
6
P4B 10KB
1
2
3
P4A
22uF,16V
C150
22uF,16V
C151
MC33079
+
3
-
2
1
U22A
10.0k 1%
R358
10.0k 1%R359
4.99k 1%R360
MC33079
+
5
-
6
7
U22B
10.0k 1%R361
10.0k 1%
R362
4.99k 1%R363
411
VCC VEE
U22E
1K
1
2
R364A
1K34R364B
1K56
R364C
1K78R364D
1K
12R365A
1K3
4
R365B
1K56
R365C
1K
78R365D
LM339
+
11
-
10
13
U23D
LM339
+
9
-
8
14
U23C
LM339
+
7
-
6
1
U23A
LM339
+
5
-
4
2
U23B
312
VCC GND
U23E
0.1uF
C156
0.1uF
C157
312
VCC GND
U24E
D41 YEL
D42 GRN
D43 RED
D44 GRN
D45 GRN
D46 RED
D47 GRN
D48 YEL
LM339
+
11
-
10
13
U24D
LM339
+
9
-
8
14
U24C
LM339
+
7
-
6
1
U24A
LM339
+
5
-
4
2
U24B
1K12
R375A
1K
3
4
R375B
1K56
R375C
1K7
8R375D
1K12
R376A
1K
3
4
R376B
1K
5
6R376C
1K
7
8
R376D
MC33079
+
3
-
2
1
U25A
MC33079
+
5
-
6
7
U25B
100k 1%
R156
100k 1%R157 15pF
C7
100k 1%
R158
100k 1%R159
15pFC8
411
VCC
VEE
U25E
MC33079
+
10
-
9
8
U25C
MC33079
+
12
-
13
14
U25D
100pF
C122
33 ohm
R183
470pF
C125
470pF
C126
NJU7082B
+
5
-
6
7
U17B
NJU7082B
+
3
-
2
1
U17A
0.1uF
C129
84
VDD GND
U17C
1.00k 1% R186
1.00k 1%
R187
JY-6314-01-340
1
2 3 4J16
3.32k 1%
R180
100pF
C21
3.32k 1%
R185
33 ohm
R130
MC33079
+
3
-
2
1
U20A
MC33079
+
5
-
6
7
U20B
10.0k 1%
R197
10.0k 1%
R199
10.0k 1%R354
10.0k 1%
R355
411
VCC VEE
U20E
0.1uF C147
15pF
C217
15pFC218
0.1uF
C68
MC33079
+
10
-
9
8
U20C
MC33079
+
12
-
13
14
U20D
+5V
+5V
-5V
CH1_PEAK
CH2_PEAK
DAC1_MONITOR DAC2_MONITOR
AGND
+6V
AGND AGND
AGND AGND
AGND
+6V +6V
+5V
CH3_PEAK
CH4_PEAK
AGND
+6V
+6V
ADC_SUM_CH1/3
ADC_SUM_CH2/4
AGND
AGND
AGND
AGND
AGND
AGND
AGND AGND
CH1_ADC_IN
CH3_ADC_IN CH2_ADC_IN CH4_ADC_IN
ADC_SUM_CH1/3 ADC_SUM_CH2/4
DAC3_MONITOR
DAC4_MONITOR
AGND
DIRECT_1_OUTPUT
DIRECT_2_OUTPUT
MC33079
+
10
-
9
8
U22C
MC33079
+
12
-
13
14
U22D
AGND
AGND
31.6k 1%
R181
31.6k 1%
R184
DAC1_MONITOR
DAC2_MONITOR
47pF
C74
47pFC29
470uF,10V C124 470uF,10V
C123
2SD2114K
Q2
2SD2114K
Q1
AGND
1.00k 1%R200
1.00k 1%R208
MUTE_DRIVER
8 6 7 3 2
1
4 9
5
10
SW13 SWSSV-23D09N-G6
HP_BIAS
1000pF
C148
33 ohm R272
10.0k 1%
R215 10.0k 1%
R165
0.1uF C149
4.7uF,16V
C80
AGND
+6V
AGND
AGND
AGND
HP_BIAS
Place closeto pin U17.5
Place closeto pin U25.8
750 ohm 1%
R275
2.74k 1%
R338
1.50k 1%
R339
2.05k 1%
R340
30.1k 1%
R341
750 ohm 1%
R245
2.74k 1%
R244
1.50k 1%
R224
2.05k 1%
R223
30.1k 1% R214
A=~.947V
B=~.671V C=~.469V
D=~.100V
VDR BIAS
JUNCTIONS
AB
CD ABCD
22.1k 1%
R196
22.1k 1%R198