M-Audio AIR Hub User manual

Confidential M-Audio Service Manual
M-Audio
AIR Hub
[MIUGc]
Service Manual
v1.1
2019-10-09
The information in this document contains privileged and confidential information. It is
intended only for the use of those authorized by M-Audio. 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 M-Audio and destroy all copies of this document. You may contact M-Audio at
[e-mail].
© Copyright M-Audio
ATTENTION!
This document contains sensitive proprietary information.
All recipients must have a current non-disclosure agreement
on file with M-Audio.
Do not make illegal copies of this document.

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 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 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 by M-Audio in writing 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.
All Trademarks are property of their respective companies.

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.

SPECIFICATIONS
Inputs
InputsInputs
Inputs 3
3 3
3 USB ports
Outputs
OutputsOutputs
Outputs 3
3 3
3 1/4 ” (6.35 mm) TRS
1
1 1
1 USB port
Power
PowerPower
Power 5 V, 3 A, center-positive
Dimensions
DimensionsDimensions
Dimensions
( idth x depth x height)
4.5 ” x 4.2 ” x 2.8”
113 mm x 107 mm x 70 mm
Weight
WeightWeight
Weight
0.75 lbs.
0.34 kg
SERVICE MANUAL
MODEL: air | HUB

DISASSEMBLY PROCEDURES
1. DISASSEMBLE THE BOTTOM PANEL AND BACK PANEL.
(A) REMOVE 4 PCS SCREW FROM THE BOTTOM PANEL.
(B) REMOVE 3 PCS SCREW FROM THE BACK PANEL.
(C)REMOVE 2 PCS NUT FROM THE BACK PANEL.
(Fig1)
2. DISASSEMBLE THE MAIN PCB ASS’Y.
(A)REMOVE 3 PCS SCREW FROM THE MAIN PCB ASS’Y.
(B)REMOVE 3 PCS PCB FIXED HOLDER FROM THE MAIN PCB ASS’Y.
(C)REMOVE 1 PC KNOB FROM THE MAIN PCB ASS’Y.
(Fig2)

3. DISASSEMBLE THE VR PCB ASS’Y.
(A)REMOVE 3 PCS SCREW FROM THE VR PCB ASS’Y.
(Fig3)

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

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

EXPLODE DIAGRAM
(US/EU/UK/JIS/AUS NZ)

EQUENCIAL NO EXPLODE DIAGRAM WILL BE MARKED ON REF.COLUMM OF BOM LIST
MIUGCMAO01 BOM
LEVEL
P/N DESCRIPTION QTY REF
0 MIUGCMAO01 MIUGC AC100~240V USA 0
1 BART-K00701 Rotate Knob 1 3
1 CA241410001 USB 2.0 Cable 1m A/C Black 1
1 CA241510001 USB 2.0 Cable 1m C/C Black 1
1 LAC22MAO103 Serial Number Label 1
1 LAC53MAO118 Safety Label 1
1 LAC62MAO104 Bar Code Label(CODE39) 0.125
1 LAC62MAO105 Bar Code Label(GTIN14) 0.125
1 LAC67MAR681 Label(Circle Limpid) 2
1 LAC67YAH261 Label φ8mm Green 1
1 MT133036102 Bottom Panel(Pantone BLACK C) 1 12
1 NP213MAO43 Name Plate(AIR) 1 1
1 PMIUGCMAO01 PACK ASSY 1
2 AL7-51-1365-G Safety Manual 1
2 AL7-91-1002 Gel Silica 1
2 CGMIUGC310MAO01 Gift box 1
2 CTMIUGC513MAO01 Shipping Carton 0.125
2 GEMAO04 Download Card 1
2 GEMAO10 SOFTWARE DOWNLOAD CARD 1
2 OPMIUGCMAO01 Instruction manual 1
2 PE230190402B07A Pe Bag 3.5
2 PLMIUG01 Poly Foam(Top) 1
2 PLMIUG02 Poly Foam(Bottom) 1
2 SD18015001 Soft Sheet Bag 1
1 PT13044142 PCB Fixed Holder 3 9
1 PT132040701 Back Panel(AIR)(Print/Paint) 1 14
2 PT1320407 Back Panel 1
3 ABS5000 ABS MATERIAL 15
3 CM-003-MG 300
1 PT1330034 Top Panel 1
2
2 ABS5000 ABS MATERIAL 35
2 CM-003-MG 1000
1 PU005005007 EVA 3
1 RU1130728 Rubber Pad 4 13
1 RU1304435 Rubber 2
1 SC0308F2BBI Screw M3*8 4 11
1 SC0308FBNI Screw M3X8 PFN Tapping 3 10
1 SC0310F2BBI Screw M3X10 HFB Tapping 3
1 SC2608PBNI Screw M2.6*8 PPN Tapping 3 7
1 SPSA0248TW0503 Switch Power DC5V/3A US/JP 1
1 TWMT13302080101 Knob Assembly(PRINT) 1 4
1 TWPC18M00701 Main PCB All Assembly 1
2 TWPC18M00701T Main PCB SMT Assembly 1 -
3 PC18M007 Main PCB 4 Layer FR-4 16.T 107*139mm 1 -
3 TWPC18M007A01T Main PCB SMT Assembly 1 -
4 AL2-51-4401 Transistor 2N4401 NPN SOT-23 (Transistor 1 Q7
MMBT4401LT1 NPN SOT-23)
4 AL2-51-4403 Transistor 2N4403 PNP SOT-23 1 Q3
4 AL2-52-5242 Diode MMBZ5242B 1 D4

4 AL2-54-6306 Mosfet FDC6306P P-CH SSOT-6 1 IC9
4 AL2-75-4344 IC CS4344-CZZ 24bit 192KHz Stereo D/A 1 IC5
Converter TSSOP-10
4 AL2-85-0403 IC TPS60403 1 IC7
4 CS101J5003NPO CCAP SMD 100pF/50V 5% 0603 NPO 8 C38,C43,C44,C52,C60~C63
4 CS102J5005NPO CCAP SMD 1nF/50V 5% 0805 NPO 2 C41,C45
4 CS104K5003X7R CCAP SMD 0.1uF/50V 10% 0603 X7R 25 C2,C4,C8,C9,C11~C13,C16,C17,C23,C26~C30
C33,C34,C36,C40,C42,C46,C47,C57~C59
4 CS105K1603X7R CCAP SMD 1uF/16V 10% 0603 X7R 12 C1,C3,C7,C10,C15,C18,C39,C48~C50,C56,C64
4 CS106K0605X5R CCAP SMD 10uF/6.3V 10% 0805 X5R 1 C14
4 CS106K1606X5R CCAP SMD 10UF/16V 10% 1206 X5R 2 C35,C37
4 CS180J5003NPO CCAP SMD 18pF/50V 5% 0603 NPO 2 C31,C32
4 CS200J5003NPO CCAP SMD 20pF/50V 5% 0603 NPO 2 C19,C20
4 CS330J5003NPO CCAP SMD 33pF/50V 5% 0603 NPO 2 C5,C6
4 CS470J5005NPO CCAP SMD 47pF/50V 5% 0805 NPO 2 C101,C113
4 DIENMMBD4148SE Diode Single MMBD4148SE 100V 200mA SOT-2 2 D5,D6
4 DISR26 Schottky Barrier Rectifier 2 D2,D3
4 ECS10616B Capacitor Electrolytic 10uF/16V B type 11 C53,EC6~EC9,EC11,EC13,EC15~EC17,EC20
SMD
4 ECS10716D Capacitor Electrolytic 100uF/16V D type 2 EC4,EC5
SMD
4 ECS33706D ECAP 330uF/6.3V 6.3*7.7MM SMD 1 EC10
4 ECS47616D Capacitor Electrolytic 47uF/16V D type 3 EC1~EC3
SMD
4 ICBA033FP I.C.BA033FP 1 IC3
4 ICCY7C65642-28 IC CY7C65642-28 LTXC QFN-28 1 IC1
4 ICNJM2112M IC QUAD OPA NJM2112M DMP14 1 IC4
4 ICNJM4580E IC NJM4580E SOIC-8 1 IC6
4 ICUSBLC62SC6 IC USBLC62SC6 SOT-23-6L 1 D1
4 ICYH104M04 IC MCF51JU32+Program 1 IC2
4 ICMCF51JU32VFM IC MCF51JU32VFM QFN32 1 (IC2)
4 JK4CC111-4-4 USB 3.1 C-Type Jack 90° 1 J1
4 RS000004F06 RES 0Ω1% SMD 1206 3 R33,R34,R60
4 RS001K10F03 RES 1K 1% SMD 0603 9 R29,R30,R35,R41,R48,R55,R59,R66,R68
4 RS001M10F03 RES 1M 1% SMD 0603 6 R9,R10,R13,R14,R18,R23
4 RS002710F03 RES 27Ω1% SMD 0603 2 R3,R4
4 RS010010F03 RES 100Ω1% SMD 0603 10 R19,R20,R24~R26,R28,R46,R51,R71,R72
4 RS010K10F03 RES 10K 1% SMD 0603 13 R8,R22,R31,R32,R37,R40,R43,R47,R53,R54
R63,R67,R69
4 RS015K10F03 RES 15K 1% SMD 0603 3 R6,R38,R44
4 RS01K510F03 RES 1.5K 1% SMD 0603 1 R1
4 RS020K10F03 RES 20K 1% SMD 0603 1 R21
4 RS047K10F03 RES 47K 1% SMD 0603 1 R11
4 RS064910F03 RES 649Ω1% SMD 0603 1 R12
4 RS100K10F03 RES 100K 1% SMD 0603 3 R2,R27,R70
4 RS2K4910F03 RES 2.49K 1% 1/10W SMD 0603 4 R49,R52,R56,R57
4 RS47K510F03 RES 47.5K 1% SMD 0603 2 R64,R65
4 RS49R910F03 RES 49.9Ω1% SMD 0603 2 R61,R62
4 RS4K4210F03 RES 4.42K 1% SMD 0603 2 R39,R45
4 RS510K10F03 RES 510K 1% SMD 0603 1 R7
4 RS5K1110F03 RES 5.11K 1% SMD 0603 2 R57,R58
4 RS7K3210F03 RES 7K32±1% SMD 0603 2 R36,R42
4 RS820K10F03 RES 820K 1% SMD 0603 1 R50

4 TR2SD2114KSM Transistor 2SD2114K NPN SOT-23 4 Q1,Q2,Q4,Q5
4 TRC4116GR Transistor 2SC4116GR SC-70 1 Q9
4 TRDMP2035U MOSFET P-CH DMP2035U SOT-23 1 Q8
4 TRMMBT2907ALT1 Transistor MMBT2907ALT1 PNP 60V 600mA 1 Q6
SOT-23
4 UH160808T-600Y BEAD 60Ω@100MHz 3A ±25% 0603 1 L2
4 UHACM2012900-2P Chock 90Ω0.4A 2.0X1.2mm 1 L1
4 UHSQD105T-751 Common Inductor 700Ω±35% 10.3X8mm 1 L4
4 XTM08000XA1 Crystal Oscillator 8MHZ 5*3.2mm 1 X2
4 XTM12000X801 Crystal Oscillator 12MHz 3.2*2.5mm SMD 1 X1
3 TWPC18M007B01T VR PCB SMT Assembly 1 -
4 ECS10616B Capacitor Electrolytic 10uF/16V B type 2 EC12,EC14
SMD
2 TWPC18M007A01 Main PCB DIP Assembly 1 8
3 AL4-02-0007 Jack 1/4 Stereo 7-Pin Fem Mini W/Grnd 2 J6,J7
Lug Straight
3 JK292336-1 USB A TYPE Jack 90° 3 J2~J4
3 JKDJ-0702B-020 DC Base 2.0MM 1 J5
3 JKK6J62AL6E2KY TRS Jack 7P 90°Female 1 J8
3 TE10200601 Connector in Header 180°Pitch:2.00mm 1 TE3
Single Row 6P DIP
3 TE612000402 Connector 4Pin P=2.0mm 1 TE1
3 VRR10301540 Potentiometer Rotary Volume 10K 1B Shaft 1 P1
Length 15mm Pual Unit 90°
2 TWPC18M007B01 VR PCB DIP Assembly 1 6
3 TE10200602 Pin Header 90°Pitch:2.00mm Single Row 1 TE2
6P DIP
3 VRR10322502 Potentiometer Rotary Volume 10K 1B Shaft 1 P2
Length 22.5mm Pual Unit
1 WR0620001001 Isolation Cable 6Pin Single Row Pitch 1
2.0mm Length 100mm Female/Female Header
1 WS142035004O Teflon Spacer 1 5

!"#$%#&'()*+,-"./++

!"#$%#&'()*+,-"./++

!"#$%#&'()*+,-"./++

!"#$%#&'()*+,-"./++

!"#$%#&'()*+,-"./++

!"#$%#&'()*+,-"./++

!"#$%#&'()*+,-"./++