Alesis Multimix 16 USB, XU7 Service Manual

ALESIS

MultiMix 16 USB

(XU7)

Service Manual

P/N: 8-31-0157-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 [e-mail] or at
[e-mail].

Copyright Alesis, LLC

THIS DOCUMENT CONTAINS SENSITIVE

PROPRIETARY INFORMATION.

ALL RECIPIENTS MUST HAVE A CURRENT

NON-DISCLOSURE AGREEMENT ON FILE

COPIES OF THIS DOCUMENT

ATTENTION!

WITH ALESIS, LLC.

DO NOT MAKE ILLEGAL

Confidential Alesis Service Manual 8-31-0157-A

SERVICE MANUAL

MODEL:MULTIMIX 16USB

Multimix 16 USB Key Features

Three Models:

Multimix 16 USB (8 mic/line preamps, 4 stereo inputs)

Clean and powerful preamps – up to 50dB of preamp
gain for capturing quiet sources. Globally switched
phantom power.

4 Stereo inputs – Great for line-level instruments.

Internal digital effects processor with 100 preset
effects and an easy-to-read display – includes a variety

of reverbs, delays, choruses, flanges, a pitch transposer and
multiple combinations of these.

3-band EQ per channel – a potent tool for sonically
shaping each channel to get that perfect mix.

1 pre/post-fader aux send per channel (switchable) –

gives you control over the level of the pre- or post-fader
signal being routed to an external device.

1 post-fader aux send/effects send per channel – a
control for the signal being routed to another external
device or to the onboard effects processor.

Control room output level – provides control over the
separate control room output

2-track send and return – lets you mix your audio to tape
or other media and to add a tape deck or CD player to the
mix.

Stereo USB input and output – routes the main output
and the 2-track return through the USB port in crystal-

clean, 16-bit, 44.1 kHz stereo digital audio. Use the
Multimix USB as a high-quality soundcard for recording
and playback with Windows and Macintosh computers.

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,
Aux 3/4, 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

WIRING DIAGRAM

(US/EU/UK/AUS NZ)

A A

B B

C C

D D

8

8

For Development ONLY

M_TE2

CON6P

3

4

5

6

7

2

M_TE3

1

6

3

4

5

1

2

a

7 8

b c d e f g p

M_Q1

220uf/16V

M_C3

7

BC857B

10 4

M_R11

M_R6 220

M_M1

12MHz

56789

P3.0/RXD

220

P1.7

P1.6

6

10

11

12

15

XTAL1

RD

13

P3.1/TXD

P3.2

P3.3

P3.4

P3.5

WR

M_R1

14

39

XTAL2

NC4

28

NC3

17

NC2

NC1

M_R7 220

123

P1.5

M_R8

220

44

P1.4

M_R9 220

43

P1.3

M_R10

M_R12 220

220

41

42

P1.1

P1.2

M_R13 220

40

P1.0

M_C2

100n

5

M_LED1123

9

6

M_Q2

BC857B

M_R17

100

M_R15

M_R16 100

6

47

100

16

VSS

PSEN

RST

ALE

EA

4

26

27

5

M_C1

29

P2.7

25

P2.6

24

P2.5

23

P2.4

22

P2.3

21

P2.2

20

P2.1

19

P2.0

18

P0.7

30

P0.6

31

P0.5

32

P0.4

33

P0.3

34

P0.2

35

P0.1

36

P0.0

37

VCC

38

M_IC1

87C52

5

100n

M_R2 470

M_R3 470

4

4

12

3

4

XTAL1

XTAL2

3

13

GND

Title

Size Document Number Rev

Date: Sheet of

A3

M_R5

XA\XAXMICON PP

MICON_DSP for XA/XU SERIES

2

100n

5

6

CON6P

2

INT/EXT

RESET

3V_BYPASS

WORDCLK

SYSCLK

14

M_R4 47

3

4

BITCLK

91011

2

8

P1/CLK

P2

P3

1

M_TE1

567

P0/DATA

16

ADC_IN

VCC

DAC_OUT

1

M_R14 47

15

AL3201

100n

M_IC2

M_R15

3

2

3 3Tuesday, September 16, 2003

1

1

A A

B B

C C

D D

CON3P20

47uF/16V

PC27

10K

8

10

PU3C

TL084

+

33pF

PC13

33pF

PC19

11.2896MHz

3

PM1

PL2

2
1

PM2

CON3P20

PJ1

PL3

BEAD

1M

PR23

1 2 3 4

PU2

PR22

100

7

100n

PC17

5 6 12 NC

14

6

13

PU2

7

74AHCU04

12.288MHz

0R

PU2

8

100n

9

-

47uF/16V

PC23

DIODE

PR15

PD12

10K

10K

330

PR12

PC33

PR18

2K7

12

PU3D

TL084

PR20

3
12 13

11

PR21

10K

+

14

47uF/16V

3300pF

15

INR­AG
AG VA

DOUT

WC

DG

9

10

10n

470

13

330

PC44

PC31

MID

14

PR28

-

PR9

16

INR+

PC22

470

REF-

PR11

PU3B

TL084

5678

PR25

2

INL-

PC16

3300pF

PC15

REF+

10n

PR24

100

4

5

1

INL+

FRMT

PR16

123

6

+

7

VDDG

470

PTE10

47uF/16V

PC24

PR26

10K

PR14

10K

-

PR13

10K

11

PR7

330

47uF/16V

PC25

100n

V-15

10n

PC32

AL1101

PU4

PC26

10n

PC43

4

2K7

V+15

PR17

2

+

-

1

330

47uF/16V

3

PR10

PC26

PU3A

TL084

8

7

6

11

15 16

24

9

RST

H/S

TCBLD

TCBL CEN

22

GND

8

GND

2

GND

U

18

+48V

1

V

APMS

17

CON2P20

PTE2

10

1

7

5

4

V+15

V-15

D5V

CON8P20

8

V+5DGAG

6

7

AG

3

4

5

OMCK

AUDIO

19

2

21

SDIN

EMPH

3

PTE3

ILRCK

ISCLK

ORIG

28

390

100

220pF

C56

121314

COPY/C

PR30

R780

SFMT1

1

5

SFMT0

TXN

4

6

VD+

23

VL+

2

VL2+

20

VL3+

27

VL4+

TXP

CS8405A

26

25

11 10 9 8

PU2

390

PR8

BEAD

PL1

Coax SPDIF

PU1

100n

100n

PC34

PC28

5

+5V

4

DIGITAL PCB

3

2

Date: Sheet of

Title

Size Document Number Rev

A2

XU6/XU6 POWER

Digital Out for XU6/XU7

.1uF

PC39

2

G

PC38

.1uF

PC12

100uF/35V

PD9

47V

390KI

DR2

100uF/100V

PC5

1N4002

PD4

1N4002

PD3

PC7

47uF/50V

47uF/50V

PR2

10KI

47uF/100V

PC4

PC6

20KI

BD239C

DR1

1N4002

PD2

3

PR1

10I

PIC5

PTE1

1
2

PD1

1N4002

47uF/100V

PC3

CON2P20

PHANTOM

S01

2

V-15

2

PTE12

1

V+15

47uF/25V

PC8

2

1N4002

1N4002

PD9

PD5

I

G

O

PC9

3

7815

1

1000uF/35V

PIC8

47uF/16V

0.1uF

2

PC14

0.1uF

PC18

PC21

G

PC29

+5v

3

O

I

1

PIC6

7805

47uF/25V

CON3P20

3

47uF/25V

PC10

PIC7

PIC3

7915

1

O

G

I

3

1000uF/35V

PC11

2

1N4002

PD8

1N4002

PD7

3

I

O

7805

1

1

0 0Monday, August 30, 2004

CON3P20

3

AC18V

PTE4

CON4P20

4

PTE3

POWER SW

SW

1

1

2

AC18V

1

2

3

A A

B B

C C

LINE 3

LINE 2

LINE 1

LINE 1

LINE 2

LINE 3

LINE 4

D D

Channel 4

Channel 3

Channel 2

Channel 1

Channal 4

Channel 3

Channel 2

Channel 1

RS

C37

C35

C94

C89

-

20K

R256

R251

VR20

VR27

VR26

R280

R247 C297

C301

IC26B

IC25B

C402

C400

10KD

3

C180

4

IC33A

IC32A

VR55

TS

100P

20P

7

47/25V

C273

R246

VR19

C293

IC24B

CH FADER

C176

IC31A

VR54

2

5

+

C271

C270

VR18

VR17

2

560

NJM4580M

C173

C169

VR53

A
3

10KAC

J17

J16

J15

J14

ST_LCH

LINE 7/8

LINE 5/6

LINE 9/10

LINE 11/12

10K%1

R99 R127

R95

R92

R103

R122

R117

30K%1

R133

IC8B C97

IC7B

IC6B

IC9B

8

C114

C112

C104

100n

C268

R216 R257

R211

R170

R177

910%1

C334

3 1

50KB

123J

910%1

R252

R207

R222

R217

R212

R206

R221

R282

R279

R277

R2861MC159

V-15

R577

R243

C333

R178

R576

R240

C332

R175

20P

C156

R575

R237

C140

C260

R43

V+15

C304

C331

50KB

2K2

R173

C153

R574

R234

C138

C257 R41

C300

R171

C150

R667

R663

C136

C254

R39

C296

183J

3

VR12

1

183J

C303

R666

R661

C134

R373

C251

R37

C292

VR11

C299

R665

R659

C471

R368

MONO INPUT

(1-4)CHANNELS

C506

C503

R599

R598

1K3%1

R88

680P

C59

VR10

VR9

C295

C291

R664

R657

10K

C470

C474

R363

R358

C500

R597

R83 C57

R572

R84

270K

20P

C469

R702

C487

R596

R78

C55

C456

C85

R570

R79

C329

C341

R699

R73

C53

C455

C81

100n

R568

R74

C327

C339

C354

R696

RS

SRT

10/25V

10K%1

R622

R619

R615

C436

C438

C440

BAV-21-TFK

C454

C453 R778

C77

C73

BAV-21-TFK

3K92I

R566

R776

C512

C509

20K

R72

R611

R608

C325

C323

C535

C337

C335

C543

R236

R239

R242

C352

C351

C353

1M

R274

R275

R693

C379

TS

10/25V

10K%1

R607

C434

D26

D28

R564

825I

R565

825I

D29

R573

R772 R671

R774

C518

C515

R163

R166

SW3

SW4

R606

R604

C533

C531

C541

C539

R233

C548

C547

R273

R272 C377

C378

D24

R562 R563 D27

B-

R571

3K92I

C278 SW2

R160

C529

C537

R670

C546

R674

C376

J12

J13LINE 4

C237 R40

C239

R42

D22 R560

D48

R558

R561

R559

D25

D23

R569

R567

NJM4580M

C284

R157C281

R638

SW1

SW38

47/25V

C289

R669

R668

C545

R673

R675

C550

C549

J11

C235

R38

D46

R770

R771

D49

R779

C287

R636

SW37

C285

6K8%1

333J

333J

6K8%1

47/25V

R672

C551

J10

C233

R36

D44

R768

R769

D47

R777

2

47/25V

R634

SW36

C283

6

C552

J29

C491

R595

D42

R766

R767

D45

R775

-

R632

SW35

C280

LOW

50KB

-

J28

R753

R547

C489

R594

R764

R765

D43

R773

IC13A

1

20K

LPF

C519

R241

VR25

R202

123J

100/10V

7

J27

R750

R544

C487

R593

R85

R113

3

C517

R238

VR24

C342

5

NJM4580M

J26

R747

R744

R541

R538

4.7I

C485

47/50V

R592

680P

R617

R620

R80

510%1

Q7

BC847B

Q35

510%1

R112

Q28

+

4

IC11A

IC12A

100n

C513

C511

R235

R232 R196

VR16

VR23

VR22

R199

C338

C340

+

8

IC21B

R623

R75

Q5

Q33

R111

100n

IC10A

R662

VR82

R193

C336

IC20B

R70

Q3

Q31R613

Q8

R110

C110

IC51A

R57

C121

R660

VR15

VR81

R655

C544

IC19B

2

330P

C3

C4

C238

C236

C240

1K3%1

R81 C56

R86

C58

2SA1316GR

Q1

Q29

VR4

VR70

BC847B

Q6

R627

R626

R625

Q24

Q22

Q26

C108

C107

C109

IC48A

IC49A

IC50A

R55

R54

R56

62K

R139

R140

C119

C118R138

C120

R658

R656

VR14

VR13

VR78

VR80

VR79

R652

R649

R646

C542

C540

C538

C146

C147

100n

IC18B

C1

C234C2

C492

R76

R71

C54

C52

VR69

VR68

Q4

Q2VR2

R624VR3

Q52

Q50

C460

C459

V-15V

R603

R602

R137

R631

C464

C463

VR77

VR76

50KB

C145

C144

3

560

910%1

C432

C490

R621

C439

Q27

Q51

VR1

VR67

Q36

Q48

C458

R601

R630

C462

VR75

C476

V+15

1

C431

C488

R618

C437

Q25

Q49

Q34

Q46

C457

R600

R629

8

C461

123J

C475

C430

C486

R616

C435

Q23

Q47

2

Q32

6K8

.22/50V

R628

R201

MID

910%1

R200

C473

MIC4

4.7I

C429

R614

C433

Q21

Q45

1

3

Q30

+

V+15V

R198

C330

R167

R197

C472

MIC3

R548

47/50V

C83

5KAC

C84

5

R195

C328

R164

R194

MIC2

MIC1

MIC7

MIC8

R542

R539 C229

R545

R754

6K8I

6K8I

C228

C230

C231

C75

C71

C79

C444

330p

2K49I

R552

R554

R556

GAIN

C256

C259

C262

R84 R555

R89

4.7

2K49I

R557

D7

330p

D8

1N4148

2SA1316GR

C76

C72

C80

C451

.22/50V

C242

C244

.22/50V

C255

C258C243

C261

C282

C279

C286

C288

6

-

7

R192 C326

R654

R651

R648

C324

C536

C534

R161

R158

R643

R642

R191

R653

R650

R647

MIC5

MIC6

R751

R748

R745

R533

R534 R546

R535

R543

R549

C484

C483

C482

C443

C442

C441

D4

R550

R762

R760

C253

C507

C505

R612 R763

R79

R74 R553

R551

D6

D5

D37

C449

C447

C445

C82

100n

C86

C241

C496

C495

C252

C508

C504

C516

C514

C520

IC12B

IC13B

NJM4580E

R645

183J

C532

C530

R640

R641

2K2

R644

R532

R743

R540

R755

C481

1N4148

D3

D2

R758

R756

C502

C499

R610

R608

R761

R759

D35

D33

C78

C74

C494

C493

C501

C498

C510

IC10B

IC11B

HI

50KB

R742

R741

R740

+48

R752

R749

R746

D1

D36

D34

1000UF/6V

R605

R757

D31 C452

C450

C448

R165

R162

R168

1K3

C310

C312

C314

VR6

VR7

VR8

C309

C311

C313

183J

CH FADER

D32

C446

R159

C308

VR5

C307

D30

B+

R639

C528

VR74

C527

R637

C526

VR73

C525

R635

C524

VR72

C523

8

7

6

5

R633

C522

4

VR71

C521

3

C294

R169

C148

C290

VR12

13

183J

C321

C182

VR11

C319

R585

VR10

C317

C178

R583

VR9

C315

22K

1K5

C174

R349

1.5K

(5-12)CHANNELS

STEREO INPUT

C105

R579

R581

10K

47/25V

100n

C179

C183

R425 R345

R435

R350

4K7

4K7

C170

20P

R343

R338

R430

R438

10K

C100

270K

C373

R262

C175

R340R417

R485

R347

R333

R422

C32

R102

C93

C347

R258C368

C372

8

C171

R409

R335

R483 R342

NJM4580M

C405

R414

100P

R98C41

C90

C346

C363

R253

C367

R481

R337

C403

C36

R94

20P

R132

333J

C344C345

R248

C381

+

V+15

R332R479

C401

C34

R91

R128

C343

333J

C358

5

220/4V

VR64

2

C399

BAL

10K%1

NJM4580M

30K%1

R123

R118

R146

R149

6K8%1

2

13

6K8%1

-

7

VR63

1

-

1

L/CH

SRT

C42

C45

C99

C69

R144

R142

R261

50KB

VR28

VR29

R283

R285

123J

C305

6

IC27B

C404

C406

VR62

VR61

2

3

+

IC34A

220/4V

1

6

100n

VR56

J21

J20

J22

ST_RCH

TS

RS

10K%1

R97

R93

R101

R120

R125

30K%1

R131

3

IC8A C98

IC7A

IC9A

+

4

C113

C103

100n

C269

C267

R215 R213

R210

R220

910%1

VR17

3 1

50KB

2

910%1

R218

R208

560

R214

R209

R204

R219

R344

R309

R308

R3111MC157

R424

R416

R433

22K

1K5

R348

VR62

VR61

10KD

CH FADER

3

2

C177

100n

C181

5

+

8

IC33B

IC32B

IC31B R431

IC34B

220/4V

1.5K
R439

J23

LINE 11/12

R90

R116

IC6A

C111

R205

C322

123J

R203

R408

R310

C172

R423

LINE 9/10

C320

R176

R339

C168

R415

LINE 7/8

C302

C318

R174

20P

C154

R334

LINE 5/6

V-15

C298

183J

C316

50KB

2K2

R172

C151

V+15

C349

R292

BUS R

V+15

C143

20P

BUS L

LED

C22 20P

100n

18KI

18KI

C141

R537

R536

LED1

AUX A RETURN

4

C8

100P

R24 10K%1

47/25V

56K

V-15

+48V

R5

10K%1

NJM4580M

IC1A

C249

R107

1

3

-

+

1

R288

5K1

V-15

AUX_A_R/CH

J2

8

C11

100P

C13 20P

R11

10K%1

7

47/25V

56K

6

5

4

3

100n

C142

8

V+15

R10

10K%1

NJM4580M

R109

5

+

5K1

SRT

IC1B

C250

1

-

7

R291

100P

20P

10K

6

1K5

1K5

TS

RS

C10

C12

R8

-

7

503KG

VR30

6

NJM4558D

+48V

R1

R2

5

+

100n

IC22B

LED5

Y

10K%1

R9

8

C25

47/25V

5K1

R268

10K

RS

SRT

100P

C6

20P

C7

R7

10K

2

-

1

VR30

503KG

2

NJM4558D

IC22A

TS

3

R263

10K

AUX_A_L/CH

J1

10K%1

R6

3

+

4

C9

100n

R582

R584

47/25V

C374

R287

5K1

C132 20P

V-15

R580

C102

R578

10K

47/25V

100n

C155

C158

C96

270K

C371

R284

C152

C67

R129

C92

C370

R281C366

C383

4

C149

C188

100P

C65

R124

C88

C365

C362

R278

C382

C187

C62

R119

20P

R130

333J

C357C361

R276

C359

+

V-15

C186

R388

C60

R114

R126

C356

333J

C380

3

220/4V

C185

R383

10K%1

30K%1

R121

R115

R145

R148

6K8%1

2

13

6K8%1

1

R484

4K7

R385

4K7

20P

10K

R380

R377

C

1

10KAC

NJM4580M

123J

-

C391

NJM4580M

C411

C68

C101

R143

50KB

VR29

R259

R482 R382

C66

C95

2

R141

R260

VR28

R254

C369

2

IC27A

C390

R480

R379

C410

2

VR56

C63

C91

20K

R255

VR27

R249

C364

IC26A

C389

R376R478

C409

VR55

R/CH

C61

C87

-

R250

VR20

VR26

R244 C360

IC25A

C388

6

C408 VR54

3

SRT

100P

20P

1

47/25V

C274

C272

R245

VR19

VR18

C355

NJM4580M

IC24A

VR63

VR64

1

-

7

BAL

VR53

2

Title

Size Document Number Rev

Date: Sheet of

A2

XU7/XU7IN1.SCH PP

XU7 INPUT1 CIRCUIT DIAGRAM

1

1 3Wednesday, May 12, 2004

POWER

LED4

G

YH HORNG ELECTRONIC CO., LTD.

SW12

I LIMITOR

R589

6K8

SW11

SW12

SW10

SW9

AUX A LEVEL

1

R362

R356

R367

R706

R705

R301

R304

R681

R679

LED23

LED22

LED39

LED38

R722

R721

SW18

SW46

R399

R402

R728

R727

+15V

R298

R677R707

C165

C166

C167

C480

C479

C478

R718

R716

SOLO/PFL

SW15

SW16

SW17

SW43

SW44

SW45

R396

R725

R704

R477

4K7

3K9

20P

C164

C477

R302

R305

1

MUTE/ALT3/4

SW28

SW50

ALT4 BUS

ALT3 BUS

R476

10K

R299

C

SW27

SW49

R475

R474

NJM4580M

R296

R682

10KAC

2

SW26

SW25

SW47

SW48

R739

R680

VR52

R738

R678

VR51

R737

R328

2

R676

VR50

3

5K1

1
R736

R325

-

1

VR49

5K1

R456

R322

VR94

R454

10KD

2

R319

R690

3

+

100/10V

C387

VR93

VR92

R403

R406

R452

R450

VR60

R688

R686

4

IC21A

C385

C386

VR91

R400

R397

R731

R729

VR59

R684

IC20A

C384

R723

R726

3

VR58

IC19A

C556

R720

R724

VR57

100n

IC18A

C555

1

R719

BUS R

VR98

C139

IC55A

C554

R717

VR97

C137

IC54A

C553

PAN

BUS L

VR96

C135

IC53A

A

VR95

C133

C468

IC52A

10KAC

2

VR51

VR52

C467

VR50

C466

V-15

3

VR49

C465

2

1

R732

R451

R369

R374

LED31

LED30

LED32

LED45

SW26

SW25

SW50

SW49

MUTE/ALT3/4

R323

R320

R326

R698

R693

R692 VR90

1

VR42

VR43

10KW

AUX B LEVEL

VR89

R364

LED44

SW48

4K7

2

VR41

VR88

R709

R359

LED43

SW47

VR40

VR87

47K

LED42

E SW

Q41

Q43

Q14

Q16

2.2/50V

MUTE/ALT3/4

-15v

10K

R366

R372

3

R712

R714

AUX B

Q37

Q39

Q12

Q10

C560

C559

C397

C398

1N4148

R361

R357

R708

R710

C558

C557

C396

C395

Q15

Q17

D41

D40

D15

D16

SW18

SW46

PFL BUS

Q13

D39

D14

SW17

SW45

Q11

D38

D13

SW16

SW44

BC847C

Q44

SW15

SW43

R735

R734

R733

R453

R455

R457

47K

V-15

LED36

LED35

LED34

LED37

MUTE/ALT3/4

PFL

4K7

AUX B LEVEL

1

Y

10KW

SW32

R387

2

VR47

SW31

VR46

SW30

R384

VR45

SW29

R381

VR44

R378

AUX B

LED29

LED28

LED27

LED26

SW22

SOLO L BUS

SW21

27K

V-15

R437

SOLO/PFL

SW20

SW19

R429

R436

R428

R420

MUTE/ALT3/4

R421

R413

ALT4 BUS

R412

27K

SW31

SW30

SW32

ALT3 BUS

R427

R419

R411

R435

5K1

SW29

5K1

R462

R460

R458

R464

RED

2K7

D19

D18

D17

D20

1N4148

SOLO/PFL

3

SW22

PFL BUS

R463

R461

R459

R465

SW21

SW20

SW19

SOLO R BUS

R587

R588

R586

AUX A POST/PRE

POST

R341

R336

R331

R346

4K7

2

VR38

VR37

VR36

VR35

3

AUX A

10KW

SW42

AUX A POST/PRE

SW8

POST

R300

R297

R303

R306

R691

R689

R685

R687

1

10KW

AUX A LEVEL

BUS R

BUS L

SW41

SW7

VR34

VR86

SW40

SW6

4K7

VR33

VR85

SW39

SW5

2

VR32

VR84

VR31

VR83

LED33

SW28

R329

3

AUX A

SW27

PRE

R701

4K7

R715

R713

R711

R703

R700

R697

R365

R370

R375

BC847C

Q42

Q40

Q38

SOLO/PFL

SOLO R BUS

R371

47K

R307

R694

1K5

R683

R360

6K8

LED24

LED25

LED41

LED40

RED

R401

R398

R404

R407

27K

R405

27K

SOLO L BUS

R730