SE-U55

SERVICE MANUAL

Ref.No.3692

May 2001

USB Digital Audio Processor

SE-U55UP

FUNCTION SELECTOR

INTERNAL LINEMIC

MONITOR

DIGITAL

INPUT LEVEL

PHONE LEVEL

MAX

MAX

MIC

PHONES

USB DIGITAL AUDIO PROCESSORSE-U55

SE-U55

Type USB digital audio processor

Connection method USB (Universal Serial Bus Ver. 1.1)

Sampling rate

Digital input 32/44.1/48 kHz compatible

Digital output 44.1 kHz

Frequency characteristics 0.3 Hz to 20 kHz (+0/-0.5 dB, LINE OUT)

Signal-to-noise ratio 100 dB (A-filter)

Total harmonic distortion 0.002% (1 kHz, 0 dB)

Output level 1.0 Vrms

Line input level 250 mVrms

Microphone input se4nsitivity 5.0 mVrms

Power supply USB power supply, separately sold DC 7.5 V (exclusive adapter)

Current dissipation 400 mA

External dimensions 50 x 216 x 166 mm / 1 15/16" x 8 1/2" x 6 9/16"

Weight 0.7 kg / 1.5 lbs.

Specifications and external appearance are subject to change without notice.

Main specifications

Thank you for purchasing the Onkyo USB DigitalAudio Processor.Be sure to read this instruction manual thoroughly

before operating the unit and always adhere to theinstructions given within during operation. Also,keep this instruction in a safe place for future

reference.

Instruction Manual

USB Digital Audio Processor

SE-U55

UP

FUNCTION SELECTOR

INTERNAL LINEMIC

MONITOR

DIGITAL

INPUT LEVEL

PHONE LEVEL

MIN

MIC

- +

PHONES

USB DIGITAL AUDIO PROCESSORSE-U55

AccessoriesThe SE-U55 comes supplied with the accessories shown below. Make sure that theseaccessories are present at the time of purchase. The number in parenthesis is the quantityof that accessory.

❒ This instruction manual (1)Explains operational procedures and the required settings forconnecting the SE-U55 to your computer.

❒ CD-ROM (1)Contains the software for using the SE-U55 with a computerand an on-line instruction manual.

❒ SE-U55 (1)The USB digital audio processor. The SE-U55 converts yourcomputer’s sounds to professional-level high-quality audiosound.

❒ Audio pin-cord (1)For the analog connection of the SE-U55 to external analogaudio devices.

❒ USB cable (1)For the connection of the SE-U55 to your computer.

❒ CarryOn Music instruction manual (1)Instruction manual for using the supplied software CarryOnMusic.

Note:The power supply for the SE-U55 is supplied through the USB cable from the connected computer.

❒ Registration Card (1)

❒ Quick Setup guide (1)

SE-U55

CHASSIS-EXPLODED VIEW

9

1012

8

7

13

7

11

14

6

14

2

1557

7

7

U1

19

1719

19

1618

3

Q751

21

20

SE-U55

CHASSIS-EXPLODED VIEW PARTS LIST

REF NUMBER DESCRIPTION PART NUMBERU1 PC BOARD AS, NAAR-7035-1C 1W223535-1C1 CHASSIS 271003922 3TTB+8B(BC), SCREW 8384300883 3P+10FN(BC), SCREW 821430104 SPACER M506RS 272702625 CASE, (L) 291052036 CASE, (R) 291052047 3TTB+8B(UN), SCREW 8389300888 FRONT PANEL 27212266A9 FACET, (SEL) 2819892010 GUIDE, (VR) 2726803411 END CAP, (L) 2812539212 END CAP, (R) 2812539413 KNOB, (SEL) 2832588514 KNOB, (MIC) 2832588415 LABEL, SPEC 2936284716 STANDING AS 2816306617 CUSHION, (DAC) 2814144318 3SMS8W.SW+14B(BC), SCREW 80143319 3TTB+8B, SCREW 83813008820 SHLD PLT (U) 2715046821 SHLD PLT (D) AS 27150467

SE-U55

SCHEMATIC DIAGRAM (INPUT SELECTOR : INTERNAL)

DAC

C9/C15

P401

Q200

2SA1162-Y

Q201

2SC2712-Y

11 10

9 8

13 12

5 63 4

Q357

74HC04

1 2

7

14

Q902SI-3033LUS

GI O

Q903

SI-3033LUS

GI O

Q901

SI-3050F

G

1

INOVC VOS

E903

C200

102J

Q402

CS

8404A

C/SBF 10

C6/C2 4

C7/C3 1

CBL/SBC15

EM0/C914

EM1/C813

FSYNC 7GND18

M021

M122

M223

MCK 5

SCK 6

SDATA 8

TRNPT/FC124

TXN17

TXP20

U 11

V 9

VD+19

C1/FC0 3

12

PRO 2

RST16

Q753

74H

C4053 0X 12

0Y2

0Z5

1X 13

1Y1

1Z3

A 11

B 10

C 9GND8

INH6

VCC 16

VEE7

XCOM 14

YCOM 15

ZCOM4

AIL4

AIR5 CL 47

DA 46

DI1

D62

DI1

O63

DI1S

1

DI2

C60

DI2

D57

DI2

W59

DO1C

51

DO1D 50

DO1W 49

DO2C6

FO

C56

FO

D55

FO

W54

LOCK 48

VDDA13

VD

DD

652

VSSA12

VS

SD

10

53

VS

SD

11

58

VS

SD

12

61

VS

SD

1364

MODEL NO SE-U55/UE-155P901

L752

BLM

21A

102F

L751

BLM

21A

102F

L502

BLM21B221SB

L501

BLM21B221SB

L503

BLM21B221SB

L901

BLM21P221SG

L753

BLM21A102F

L754

NC

H-1

470

L401

47UH

NCH-1479

F901

ICP-S2.3

D903

SFPJ63

D2051SS352

D204

1S

S352

D203

1SS352

D202

1S

S352

D200

1SS352

D201

1SS352

D403

D901

SFPJ63

D902 SFPJ63

D401

1SS352

D402

Q905

RN1402

R511

0

R512

0

R513

0

R514

0

R515

0

R516

0

R517

0

R518

0

R519

0

R502

0

R504

0

R503

0

R407

75

R501

1K

R408

75

R714

0

R907

0

R914

0.22

(1W)

R207

1K

R206

1K

R205

1K

R204

1K

R2022.2K R203

2.2K

R201

4.7K

R200

10K

R905

10K

R902

1K

R901

10K

R913

330

R911

330

R753

0

R904

10K

R903

22K

R751

1M

R912

0

R404

2.2

K

R403

2.2

K

R402

2.2

K

Q904

M51957B

CAP 5GND4

IN2

NC11

NC23

NC3 8

OUT 6

VCC 7

C546

101J

C763

C764

180J

C543

105M

C512

473Z

C511

223Z

C510

102J

C509

331J

C752

104Z

C751

104Z

C540

101J

C539

101J

C538

101J

C534

101J

C535

101J

C536

101J

C537

101J

C530

101J

C502

102J

C503

101JC

505

101J

C506

102J

C507

101J

C508

102J

C501

101J

C504

102J

C413

472K

C417

104Z

C913

104Z

C414

104Z

C202

102J

C201

102J

C768

472K

C767

103K

C766

333K

C753

050C

C904

104Z

C756

104Z

C754

050C

C755

103K

C415

104Z

C765

104Z

C905

1/5

0

C410

0.1

/50

C9100.47/50

C901

10/1

6

C206

100/1

6

C205

10/5

0

C20410/50

C203

10/50

C401

47/16

C903

470/6

.3

D904

SLR

-332M

C

U401

TORX178A

U402

TOTX178

Q751

UDA1325

BC

K61

CLK

27

D+8

D-6

DA

57

GP0/BCKI17

GP1/DI13

GP

2/D

O63

GP3/WSO

1

GP4/BCKO2

GP5/WSI15

P0.0

56

P0.1

58

P0.2

60

P0.3

62

P0.4 64

P0.53

P0.65

P0.77

P2.014

P2.116

P2.218

P2.3

20

P2.4

22

P2.5

23

P2.6

29

P2.7

30

SCL19

SD

A21

SHTCB4

VDDE12

VDDI9

VD

DX

28

V

VR

VR

VS

SA

355

VSSE11

VSSI10

VS

SX

24

WS

59

XT

AL1A

54

XT

AL1B

25

XT

AL2A

53

XT

AL2B

26

PS

EN

31

X751

48M

D406

D405

UD

Z3.3

B

D404

C412

22/1

6

L402

NSRF-2046

Q754

TC7WU04

1 7

4

8

Q754

TC7WU04

6 2

Q754

TC7WU04

3 5

R411 680

R410 680

R409 680

R414

1.5

K

R413

1.5

K

R412

1.5

K

01

7

+3.3D

+3.3A

+5A

RE

SE

T

DI

DO

BCKI

WSI+5D

BCKO

128FS

DIT

_C

3

DIT

_C

2

DIT

_C

15

UP_LED

SR

C_D

A

SR

C_LD

SR

C_R

ST

CLK RESET

WAV/DIR

BCKO

WSO

DO

R714 100

UDDUJJ

BK1608LL241-T

C534-540

R511-519ohm

544-546101J

NO USE

101JC530

UJJ UDD

UJJ UDD

(UDD= )

C905

C543

UJJ UDD

ohm

C502,504,506,508

R502-504

C512

C511

C510

C509

L501-503

C501,503,505,507

0

UJJ UDD

NC

OUTPUT

OPTICAL

INPUT

OPTICAL

1.5A

7.5V

DC IN

COAXIAL

INPUT

OUTPUT

GND

SE-U55

SCHEMATIC DIAGRAM (INPUT SELECTOR : INTERNAL)

L807

4BLH-CUM05R5CN1

Q401

TDA1373H

AIL4

AIR5

AOL19

AOR115

BS 34

CEN 35

CL 47

CLD18

CLI

23

CLO

127

CLO

228

CLO

330

CLO

431

CUS 36

DA 46

DI1

D62

DI1

O63

DI1S

1

DI2

C60

DI2

D57

DI2

W59

DO1C

51

DO1D 50

DO1W 49

DO2C6

DO2D10

DO2W16

EM 37

FO

C56

FO

D55

FO

W54

FS

L25

LD 45

LOCK 48

MU 44

SA 43

TST1 42

TST2 41

VDDA13

VDDA4

19

VDDD17

VDDD211

VDDD314

VD

DD

4

32

VDDD5 39

VD

DD

652

VSSA12

VS

SA

4

20

VSSD18

VS

SD

10

53

VS

SD

11

58

VS

SD

12

61

VS

SD

1364

VSSD212

VSSD313

VSSD417V

SS

D5

24

VS

SD

626

VS

SD

729

VSSD8

33

VSSD9 40

XT

LI

21

XT

LO

22

RST 38

L801BLM21P221SG

L802

L754

NC

H-1

470

F801

ICP-S1.0

D710

1S

S352

R837 0

R819 1.5K

R838 0

R802 15

R801 15

R908

0.33 (1W)

R846 0

R847 0

R415

560

R405

1M

R753

0

R751

1MR404

2.2

R403

2.2

R402

2. 2

C911

104Z

C534

101J

C535

101J

C536

101J

C537

101J

C912

104Z

C768

472K

C419

103K

C418 223K

C409104Z

C405

080D

C406

080D

C403

104Z

C767

10

C76

C753

050C

C754

050C

C755

103K

C402

104Z

C404

104Z

C420

220/6

.3

C401

47/16

X401

33.8688MHZ

X751

48M

P801

+V 1

D+ 3

D- 2

GND 4 D802

UDZ5.6B

D801

UDZ5.6B

4Q754

TC7WU04

6 2

Q754

TC7WU04

3 5

R401

4.7

+3.3D

+5D

D1+

I2C

_S

CL

I2C

_S

DA

D1-

CD

CD

+

+5D

+3.3D

4BLH-CUN05R5BN1

UJJ UDD

0ohmR846,847

L807

NCAR-7035

USB UP

BY MARK ARE CRITICAL FOR SAFETYIDENTIFIED

NOTE

THE COMPONENTS

REPLACE ONLY WITH PART NUMBER SPECIFIED.

.

. VOLTAGE (MEASURED WITH VOLTMETER) IS DC VOLTAGE. (NO INPUT SIGNAL)

. ALL PNP TRANSISTORS ARE EQUIVALENT TO 2SA1015-GR UNLESS OTHERWISE NOTED.

. ALL NPN TRANSISTORS ARE EQUIVALENT TO 2SC1815-GR UNLESS OTHERWISE NOTED.

. ALL DIODES ARE EQUIVALENT TO 1SS133 UNLESS OTHERWISE NOTED.

. ELECTROLYTIC CAPACITORS ( ) ARE IN F/WV.

. ALL CAPACITORS ARE IN pF/50WV UNLESS OTHERWISE NOTED.

EX) 030 3pF 330 33pF 331 330pF

u

ALL RESISTORS ARE IN OHMS 1/4WATTS UNLESS OTHERWISE NOTED.

. THE THICK LINES ON PC BOARD ARE THE PRINTING SIDE OF THE PARTS.

EX) PRINTING SIDE

CIRCUIT IS SUBJECT TO CHANGE FOR IMPROVEMENT..

.333 0.033uF

INPUT SELECTOR : INTERNAL

SE-U55

SCHEMATIC DIAGRAM (INPUT SELECTOR : INTERNAL)

DAC

4BLH-CUM05R5CN1

L504

4BLH-CUN05R5BN1

P303

P302

P301

E902

E901

C307

221K

C305

331K

C374

101J

C324

101J

C366

152J

C316

152J

C368

152J

C318

152J

Q752

74H

C4053 0X 12

0Y2

0Z5

1X 13

1Y1

1Z3

A 11

B 10

C 9GND8

INH6

VCC 16

VEE7

XCOM 14

YCOM 15

ZCOM4

SCHEMATIC DIAGRAMUE-155

L516

BLM21P221SG

L506

BLM21P221SG

BLM21P221SG

L355

BLM21P221SG

L356

BLM21P221SG

L351

BLM21P221SG

L352

BLM21P221SG

L353

BLM21P221SG

L302

BLM21P221SG

L301

BLM21P221SG

L753

BLM21A102F

L754

NC

H-1

470

13

D2051SS352

D204

1S

S352

D203

1SS352

D202

1S

S352

D751

1S

S352

R523 0

R522 0

R521 0

R311

0

R356

0

R355

0

R520

0

R510

0

R372

470

0

R505

0

R303

0

R324

330K

R374

330K

R317

0

R312

0

R322

470

R373

470

R323

470

R309

0

R506

0

R301

330K

R307

4.7

K

R305

680

R304

100K

R302

1K

R308

33K

R392

1K

R306

1K

R327 8.2KR377

R387

6.8K

R337

6.8K

R347

100K

R714

R397

100K

R338

10K

R351

33

R352

33

R388

10K

R314

0

R389 22K

R364

0

R339 22K

R365

33K

R315

33K

R336

22K

R385

82K

R335

82K

R386

22K

R393

33

R343

33

R310

100K

R361

100K

R362

100K

R325

4.7

K

R375

4.7

K

R332

100K

R382

100K

R32010K

R370

10K

R318

2.2K

R319

2.2K

R368

2.2K

R369

2.2K

R321

4.7K

R371

4.7K

R334

33

R394

33

R316

100K

R753

0

R366

100K

(NO

US

E)

R752

10K

C548

101J

C547

102J

C525

102J

C526

101J

C523

102J

C556

101J

C555

102J

C527

102J

C528

101J

C524

101J

C544

101J

C545

101J

C546

101J

C763

180J

C762

104Z

C764

180J

102J

101J

C538

101J

C515

102J

C516

101J

C514

101J

C513

102J

C519

C517

C518

C551

102J

C552

101J

C554

101J

C553

102J

C756

104Z

C755

103K

C303

47/1

6

C302

100/6

.3

C315

47/16

C365

47/16

C352

220/16

C358

220/6

.3

C308

220/6

.3

C363

47/16

C313

47/16

C304 47/16

C311

10/1

6

C757

10/16

C761

220/6

.3

C351

220/1

6

C361

47/16

C362

47/16 C369

47/16

C319

47/16

C206

100/1

6

C205

10/5

0

C331

47/16

C332

47/16

C760 10/16

C758

10/16

C759

10/16

Q751

UDA1325

ALE 50

CLK

27

DA

57

NC1 45

NC2 46

P0.0

56

P0.1

58

P0.2

60

P2.6

29

P2.7

30

RTCB 36

TC 35

VDDA1 38

VDDA2 42

VD

DA

352

VD

DO

32

VD

DX

28

VINL 43

VINR 47

VOUTL 34

VOUTR 37

VREF[AD] 41

VREF[DA] 40

VRN 49

VRP51

VSSA1 39

VSSA2 44

VS

SA

355

VSSO 33

VS

SX

24

WS

59

XT

AL1A

54

XT

AL1B

25

XT

AL2A

53

XT

AL2B

26

EA 48

PS

EN

31

Q301

NJM4565M-D

(1/2)

38

2

1

Q359

NJM2140R

(1/2)

58

6

7

Q358

NJM

2140R

(1/2

)

38

2

1

Q352

NJM2140R

(1/2)

3 8

2

1

Q301

NJM4565M-D

(2/2)

5

6

4

7

Q359

NJM2140R(2/2)

3

2

4

1

Q358

NJM

2140R

(2/2

)

5 6

4

7

Q352

NJM2140R

(2/2)

5

6

4

7

Q389

RN1444-A

Q388

RN1444-A

Q387

RN1444-A

Q386

RN1444-A

Q353

RN1444-A

Q354

RN1444-A

R313

50K

(A)

(2/2

)

R313

50K

(A)

(1/2

)

D206

UD

Z5.6

B

C301

4.7/35

Q754

TC7WU047

Q754

TC7WU04

6 2

+5A

-5V

+3.3D +3.3A

+5A

-5V

CD

CR

ST

U55UJJ 155UJJ U55UDD

R521

R522

R523

UDDUJJ

ohm309, 506505,R303,

C514,516

C513,515

L301,302

L504

Rch

Lch

520

556

555

548, 554,552,

547, 553,551,

510,356,

C523, 527,525,

355,317,312,R311,

528,526,C524,

L351-353,355,356,506,516

(ECHU)

541

Rch

Lch

507-509 ohm

542

384,383,R381,

529,522,520,C518,

521,519,C517,

L505

L381-383

UDDUJJ

ohm

UDDUJJ

Lch

Lch

Rch

Rch

R(1VrmsFS)

L(1VrmsFS)

MIC IN

LINE OUT

R(2VrmsFS)

LINE IN

L(2VrmsFS)

-5V

GND

GND

SE-U55

SCHEMATIC DIAGRAM (INPUT SELECTOR : INTERNAL)

L505

Q706

74HCT700734

Q706

74H

CT

7007

11

10

Q706

74H

CT

7007

98

Q706

74H

CT

7007

56

Q706

74H

CT

7007

13

12

7

Q706

74HCT7007

1214

PO

WE

R M

OD

E

OPT/COAX

NC

I2C

_S

DA

_D

I2C

_S

CL_D

MCU_MUTE

UPLED

PR

OT

EC

T

I2C_SCL_A

I2C_SDA_A

DIG/ANA

INH

Outp

ut o

nly

MB89135A

MIC/LINE

MODE

AVR

Avss

EP

RO

M_W

R

WIN

/MA

C

CD

CD

+

ON

K/K

OR

G

P_O

N_R

ST

CDCRST

DRC_DA

DIT_C3

SR

C_R

ST

DIT

_C

15

WA

V/D

IR

DIT_C2

SR

C_LD

CLK

X1A

AVcc

Nch

Open d

rain

Vss

X0A

Vcc

X1

X0

MO

D1

MO

D0

RS

T

Q701

1 2 3 4 5 6 7 8 9 10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

S703

X701

4MHZ

S701

S702

E904

P702

Q708

74H

C4053 0X 12

0Y2

0Z5

1X 13

1Y1

1Z3

A 11

B 10

C 9GND8

INH6

VCC 16

VEE7

XCOM 14

YCOM 15

ZCOM4

P381

L383

L382

L381

L754

NC

H-1

470

D301

SF

PJ6

3D701

1SS352

Q384

RN1402

R381

0

R508

R509

R507

R384

R383

R380

100K

R330

100K

R379

33

R329

33R348

39K

R327 8.2K

R328

39K

R378 39K

R398

39K

R377

8.2K

R396

470

R395

470

R390

560

R391

560

R753

0

R730

10K

C309

105M

C359

105M

C541

C542

101J

C521

C529

C522

C520

C519

C517

C518

C706

104Z

C702

104Z

C705 104Z

C703

104Z

C704

104Z

C701

104Z

C755

103K

C372

47/16

C322

47/16

C360

22/6

.3

C310

22/6

.3

C321

10/16

C37110/16C

306

470/6

.3

Q383

NJM3414A

(1/2)

3 8

2

1

Q383

NJM3414A

(2/2)

5

6

4

7

Q382

RN1444-A

Q381

RN1444-A

R326

50K

(A)

(1/2

)

R326

50K

(A)

(2/2

)

D702

UDZ3.3B

Q704

BR

24C

16F

GND4

S01

S12

S23 SCL 6

SDA 5

VCC 8

WC 7

Q705

BR

24C

16F

GND4

S01

S12

S23 SCL 6

SDA 5

VCC 8

WC 7

Q754

TC7WU04

6 2

R754

6.8

K

R718

10K

R715

10K

R716

10K

R717

10K

R708

10K

R703

10K

R704

0

R743

0R

702

10K

R706

10K

R746

15K

R701 2.7K

R700 10K

R705 10K

R713 10K

R709

390

R710

470

R711

820

R729

10KR707

0

R744 6.8K

R745

3.9K

Q385

RN

2401

Q711

RN2401

CD

CD

CR

ST

MC

U_M

UT

E

MIC

/LIN

E

INH

MO

DE

CD

CD

+

P_O

N_R

ST

OP

T/C

OA

X

WIN

/MA

C

WIN

/MA

C

+5D

I2C

_S

DA

I2C

_S

CL

ON

K/K

OR

G

PR

OT

EC

T

PO

WE

RM

OD

E

EP

RO

M_W

R

EP

RO

M_W

R

I2C

_S

CL_D

I2C

_S

DA

_D

I2C

_S

CL_A

I2C

_S

DA

_A

DIG

/AN

A

I2C_SCL_A

I2C_SDA_A

EPROM_WR

OPT/COAX CDCRST

UP_LED SRC_DA

I2C_SCL_DMCU_MUTE

I2C_SDA_D

DIT_C3

MODE

DIT_C2

I2C_SCL_ADIT_C15

I2C_SCL_DWAV/DIR

INH I2C_SDA_A

I2C_SDA_D

MIC/LINE

DIG/ANA

RE

SE

T

SR

C_LD

SR

C_R

ST

CLK

(NO USE)

(NO

US

E)

NO USE

DIGITAL

507-509 ohm

542

384,383,R381,

529,522,520,C518,

M24C

16

M24C

16

ANALOG

MONITOR

INTERNAL

OPT/COAX SW

INPUT SELCTOR

MIC

LINE

PHONES

WIN/MAC SW

SE-U55

SCHEMATIC DIAGRAM (INPUT SELECTOR : LINE/MIC)

DAC

ADC

C9/C15

P401

Q200

2SA1162-Y

Q201

2SC2712-Y

11 10

9 8

13 12

5 63 4

Q357

74HC04

1 2

7

14

Q902SI-3033LUS

GI O

Q903

SI-3033LUS

GI O

Q901

SI-3050F

G

1

INOVC VOS

E903

C200

102J

Q402

CS

8404A

C/SBF 10

C6/C2 4

C7/C3 1

CBL/SBC15

EM0/C914

EM1/C813

FSYNC 7GND18

M021

M122

M223

MCK 5

SCK 6

SDATA 8

TRNPT/FC124

TXN17

TXP20

U 11

V 9

VD+19

C1/FC0 3

12

PRO 2

RST16

Q753

74H

C4053 0X 12

0Y2

0Z5

1X 13

1Y1

1Z3

A 11

B 10

C 9GND8

INH6

VCC 16

VEE7

XCOM 14

YCOM 15

ZCOM4

AIL4

AIR5 CL 47

DA 46

DI1

D62

DI1

O63

DI1S

1

DI2

C60

DI2

D57

DI2

W59

DO1C

51

DO1D 50

DO1W 49

DO2C6

FO

C56

FO

D55

FO

W54

LOCK 48

VDDA13

VD

DD

652

VSSA12

VS

SD

10

53

VS

SD

11

58

VS

SD

12

61

VS

SD

1364

MODEL NO SE-U55/UE-155P901

L752

BLM

21A

102F

L751

BLM

21A

102F

L502

BLM21B221SB

L501

BLM21B221SB

L503

BLM21B221SB

L901

BLM21P221SG

L753

BLM21A102F

L754

NC

H-1

470

L401

47UH

NCH-1479

F901

ICP-S2.3

D903

SFPJ63

D2051SS352

D204

1S

S352

D203

1SS352

D202

1S

S352

D200

1SS352

D201

1SS352

D403

D901

SFPJ63

D902 SFPJ63

D401

1SS352

D402

Q905

RN1402

R511

0

R512

0

R513

0

R514

0

R515

0

R516

0

R517

0

R518

0

R519

0

R502

0

R504

0

R503

0

R407

75

R501

1K

R408

75

R714

0

R907

0

R914

0.22

(1W)

R207

1K

R206

1K

R205

1K

R204

1K

R2022.2K R203

2.2K

R201

4.7K

R200

10K

R905

10K

R902

1K

R901

10K

R913

330

R911

330

R753

0

R904

10K

R903

22K

R751

1M

R912

0

R404

2.2

K

R403

2.2

K

R402

2.2

K

Q904

M51957B

CAP 5GND4

IN2

NC11

NC23

NC3 8

OUT 6

VCC 7

C546

101J

C763

C764

180J

C543

105M

C512

473Z

C511

223Z

C510

102J

C509

331J

C752

104Z

C751

104Z

C540

101J

C539

101J

C538

101J

C534

101J

C535

101J

C536

101J

C537

101J

C530

101J

C502

102J

C503

101JC

505

101J

C506

102J

C507

101J

C508

102J

C501

101J

C504

102J

C413

472K

C417

104Z

C913

104Z

C414

104Z

C202

102J

C201

102J

C768

472K

C767

103K

C766

333K

C753

050C

C904

104Z

C756

104Z

C754

050C

C755

103K

C415

104Z

C765

104Z

C905

1/5

0

C410

0.1

/50

C9100.47/50

C901

10/1

6

C206

100/1

6

C205

10/5

0

C20410/50

C203

10/50

C401

47/16

C903

470/6

.3

D904

SLR

-332M

C

U401

TORX178A

U402

TOTX178

Q751

UDA1325

BC

K61

CLK

27

D+8

D-6

DA

57

GP0/BCKI17

GP1/DI13

GP

2/D

O63

GP3/WSO

1

GP4/BCKO2

GP5/WSI15

P0.0

56

P0.1

58

P0.2

60

P0.3

62

P0.4 64

P0.53

P0.65

P0.77

P2.014

P2.116

P2.218

P2.3

20

P2.4

22

P2.5

23

P2.6

29

P2.7

30

SCL19

SD

A21

SHTCB4

VDDE12

VDDI9

VD

DX

28

V

VR

VR

VS

SA

355

VSSE11

VSSI10

VS

SX

24

WS

59

XT

AL1A

54

XT

AL1B

25

XT

AL2A

53

XT

AL2B

26

PS

EN

31

X751

48M

D406

D405

UD

Z3.3

B

D404

C412

22/1

6

L402

NSRF-2046

Q754

TC7WU04

1 7

4

8

Q754

TC7WU04

6 2

Q754

TC7WU04

3 5

R411 680

R410 680

R409 680

R414

1.5

K

R413

1.5

K

R412

1.5

K

01

7

+3.3D

+3.3A

+5A

RE

SE

T

DI

DO

BCKI

WSI+5D

BCKO

128FS

DIT

_C

3

DIT

_C

2

DIT

_C

15

UP_LED

SR

C_D

A

SR

C_LD

SR

C_R

ST

CLK RESET

WAV/DIR

BCKO

WSO

DO

R714 100

UDDUJJ

BK1608LL241-T

C534-540

R511-519ohm

544-546101J

NO USE

101JC530

UJJ UDD

UJJ UDD

(UDD= )

C905

C543

UJJ UDD

ohm

C502,504,506,508

R502-504

C512

C511

C510

C509

L501-503

C501,503,505,507

0

UJJ UDD

NC

OUTPUT

OPTICAL

INPUT

OPTICAL

1.5A

7.5V

DC IN

COAXIAL

INPUT

OUTPUT

GND

SE-U55

SCHEMATIC DIAGRAM (INPUT SELECTOR : LINE/MIC)

L807

4BLH-CUM05R5CN1

Q401

TDA1373H

AIL4

AIR5

AOL19

AOR115

BS 34

CEN 35

CL 47

CLD18

CLI

23

CLO

127

CLO

228

CLO

330

CLO

431

CUS 36

DA 46

DI1

D62

DI1

O63

DI1S

1

DI2

C60

DI2

D57

DI2

W59

DO1C

51

DO1D 50

DO1W 49

DO2C6

DO2D10

DO2W16

EM 37

FO

C56

FO

D55

FO

W54

FS

L25

LD 45

LOCK 48

MU 44

SA 43

TST1 42

TST2 41

VDDA13

VDDA4

19

VDDD17

VDDD211

VDDD314

VD

DD

4

32

VDDD5 39

VD

DD

652

VSSA12

VS

SA

4

20

VSSD18

VS

SD

10

53

VS

SD

11

58

VS

SD

12

61

VS

SD

1364

VSSD212

VSSD313

VSSD417V

SS

D5

24

VS

SD

626

VS

SD

729

VSSD8

33

VSSD9 40

XT

LI

21

XT

LO

22

RST 38

L801BLM21P221SG

L802

L754

NC

H-1

470

F801

ICP-S1.0

D710

1S

S352

R837 0

R819 1.5K

R838 0

R802 15

R801 15

R908

0.33 (1W)

R846 0

R847 0

R415

560

R405

1M

R753

0

R751

1MR404

2.2

R403

2.2

R402

2. 2

C911

104Z

C534

101J

C535

101J

C536

101J

C537

101J

C912

104Z

C768

472K

C419

103K

C418 223K

C409104Z

C405

080D

C406

080D

C403

104Z

C767

10

C76

C753

050C

C754

050C

C755

103K

C402

104Z

C404

104Z

C420

220/6

.3

C401

47/16

X401

33.8688MHZ

X751

48M

P801

+V 1

D+ 3

D- 2

GND 4 D802

UDZ5.6B

D801

UDZ5.6B

4Q754

TC7WU04

6 2

Q754

TC7WU04

3 5

R401

4.7

+3.3D

+5D

D1+

I2C

_S

CL

I2C

_S

DA

D1-

CD

CD

+

+5D

+3.3D

4BLH-CUN05R5BN1

UJJ UDD

0ohmR846,847

L807

NCAR-7035

USB UP

INPUT SELECTOR : LINE/MIC

BY MARK ARE CRITICAL FOR SAFETYIDENTIFIED

NOTE

THE COMPONENTS

REPLACE ONLY WITH PART NUMBER SPECIFIED.

.

. VOLTAGE (MEASURED WITH VOLTMETER) IS DC VOLTAGE. (NO INPUT SIGNAL)

. ALL PNP TRANSISTORS ARE EQUIVALENT TO 2SA1015-GR UNLESS OTHERWISE NOTED.

. ALL NPN TRANSISTORS ARE EQUIVALENT TO 2SC1815-GR UNLESS OTHERWISE NOTED.

. ALL DIODES ARE EQUIVALENT TO 1SS133 UNLESS OTHERWISE NOTED.

. ELECTROLYTIC CAPACITORS ( ) ARE IN F/WV.

. ALL CAPACITORS ARE IN pF/50WV UNLESS OTHERWISE NOTED.

EX) 030 3pF 330 33pF 331 330pF

u

ALL RESISTORS ARE IN OHMS 1/4WATTS UNLESS OTHERWISE NOTED.

. THE THICK LINES ON PC BOARD ARE THE PRINTING SIDE OF THE PARTS.

EX) PRINTING SIDE

CIRCUIT IS SUBJECT TO CHANGE FOR IMPROVEMENT..

.333 0.033uF

SE-U55

SCHEMATIC DIAGRAM (INPUT SELECTOR : LINE/MIC)

DAC

ADC

4BLH-CUM05R5CN1

L504

4BLH-CUN05R5BN1

P303

P302

P301

E902

E901

C307

221K

C305

331K

C374

101J

C324

101J

C366

152J

C316

152J

C368

152J

C318

152J

Q752

74H

C4053 0X 12

0Y2

0Z5

1X 13

1Y1

1Z3

A 11

B 10

C 9GND8

INH6

VCC 16

VEE7

XCOM 14

YCOM 15

ZCOM4

SCHEMATIC DIAGRAMUE-155

L516

BLM21P221SG

L506

BLM21P221SG

BLM21P221SG

L355

BLM21P221SG

L356

BLM21P221SG

L351

BLM21P221SG

L352

BLM21P221SG

L353

BLM21P221SG

L302

BLM21P221SG

L301

BLM21P221SG

L753

BLM21A102F

L754

NC

H-1

470

13

D2051SS352

D204

1S

S352

D203

1SS352

D202

1S

S352

D751

1S

S352

R523 0

R522 0

R521 0

R311

0

R356

0

R355

0

R520

0

R510

0

R372

470

0

R505

0

R303

0

R324

330K

R374

330K

R317

0

R312

0

R322

470

R373

470

R323

470

R309

0

R506

0

R301

330K

R307

4.7

K

R305

680

R304

100K

R302

1K

R308

33K

R392

1K

R306

1K

R327 8.2KR377

R387

6.8K

R337

6.8K

R347

100K

R714

R397

100K

R338

10K

R351

33

R352

33

R388

10K

R314

0

R389 22K

R364

0

R339 22K

R365

33K

R315

33K

R336

22K

R385

82K

R335

82K

R386

22K

R393

33

R343

33

R310

100K

R361

100K

R362

100K

R325

4.7

K

R375

4.7

K

R332

100K

R382

100K

R32010K

R370

10K

R318

2.2K

R319

2.2K

R368

2.2K

R369

2.2K

R321

4.7K

R371

4.7K

R334

33

R394

33

R316

100K

R753

0

R366

100K

(NO

US

E)

R752

10K

C548

101J

C547

102J

C525

102J

C526

101J

C523

102J

C556

101J

C555

102J

C527

102J

C528

101J

C524

101J

C544

101J

C545

101J

C546

101J

C763

180J

C762

104Z

C764

180J

102J

101J

C538

101J

C515

102J

C516

101J

C514

101J

C513

102J

C519

C517

C518

C551

102J

C552

101J

C554

101J

C553

102J

C756

104Z

C755

103K

C303

47/1

6

C302

100/6

.3

C315

47/16

C365

47/16

C352

220/16

C358

220/6

.3

C308

220/6

.3

C363

47/16

C313

47/16

C304 47/16

C311

10/1

6

C757

10/16

C761

220/6

.3

C351

220/1

6

C361

47/16

C362

47/16 C369

47/16

C319

47/16

C206

100/1

6

C205

10/5

0

C331

47/16

C332

47/16

C760 10/16

C758

10/16

C759

10/16

Q751

UDA1325

ALE 50

CLK

27

DA

57

NC1 45

NC2 46

P0.0

56

P0.1

58

P0.2

60

P2.6

29

P2.7

30

RTCB 36

TC 35

VDDA1 38

VDDA2 42

VD

DA

352

VD

DO

32

VD

DX

28

VINL 43

VINR 47

VOUTL 34

VOUTR 37

VREF[AD] 41

VREF[DA] 40

VRN 49

VRP51

VSSA1 39

VSSA2 44

VS

SA

355

VSSO 33

VS

SX

24

WS

59

XT

AL1A

54

XT

AL1B

25

XT

AL2A

53

XT

AL2B

26

EA 48

PS

EN

31

Q301

NJM4565M-D

(1/2)

38

2

1

Q359

NJM2140R

(1/2)

58

6

7

Q358

NJM

2140R

(1/2

)

38

2

1

Q352

NJM2140R

(1/2)

3 8

2

1

Q301

NJM4565M-D

(2/2)

5

6

4

7

Q359

NJM2140R(2/2)

3

2

4

1

Q358

NJM

2140R

(2/2

)

5 6

4

7

Q352

NJM2140R

(2/2)

5

6

4

7

Q389

RN1444-A

Q388

RN1444-A

Q387

RN1444-A

Q386

RN1444-A

Q353

RN1444-A

Q354

RN1444-A

R313

50K

(A)

(2/2

)

R313

50K

(A)

(1/2

)

D206

UD

Z5.6

B

C301

4.7/35

Q754

TC7WU047

Q754

TC7WU04

6 2

+5A

-5V

+3.3D +3.3A

+5A

-5V

CD

CR

ST

U55UJJ 155UJJ U55UDD

R521

R522

R523

UDDUJJ

ohm309, 506505,R303,

C514,516

C513,515

L301,302

L504

Rch

Lch

520

556

555

548, 554,552,

547, 553,551,

510,356,

C523, 527,525,

355,317,312,R311,

528,526,C524,

L351-353,355,356,506,516

(ECHU)

541

Rch

Lch

507-509 ohm

542

384,383,R381,

529,522,520,C518,

521,519,C517,

L505

L381-383

UDDUJJ

ohm

UDDUJJ

Lch

Lch

Rch

Rch

R(1VrmsFS)

L(1VrmsFS)

MIC IN

LINE OUT

R(2VrmsFS)

LINE IN

L(2VrmsFS)

-5V

GND

GND

SE-U55

SCHEMATIC DIAGRAM (INPUT SELECTOR : LINE/MIC)

L505

Q706

74HCT700734

Q706

74H

CT

7007

11

10

Q706

74H

CT

7007

98

Q706

74H

CT

7007

56

Q706

74H

CT

7007

13

12

7

Q706

74HCT7007

1214

PO

WE

R M

OD

E

OPT/COAX

NC

I2C

_S

DA

_D

I2C

_S

CL_D

MCU_MUTE

UPLED

PR

OT

EC

T

I2C_SCL_A

I2C_SDA_A

DIG/ANA

INH

Outp

ut o

nly

MB89135A

MIC/LINE

MODE

AVR

Avss

EP

RO

M_W

R

WIN

/MA

C

CD

CD

+

ON

K/K

OR

G

P_O

N_R

ST

CDCRST

DRC_DA

DIT_C3

SR

C_R

ST

DIT

_C

15

WA

V/D

IR

DIT_C2

SR

C_LD

CLK

X1A

AVcc

Nch

Open d

rain

Vss

X0A

Vcc

X1

X0

MO

D1

MO

D0

RS

T

Q701

1 2 3 4 5 6 7 8 9 10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

S703

X701

4MHZ

S701

S702

E904

P702

Q708

74H

C4053 0X 12

0Y2

0Z5

1X 13

1Y1

1Z3

A 11

B 10

C 9GND8

INH6

VCC 16

VEE7

XCOM 14

YCOM 15

ZCOM4

P381

L383

L382

L381

L754

NC

H-1

470

D301

SF

PJ6

3D701

1SS352

Q384

RN1402

R381

0

R508

R509

R507

R384

R383

R380

100K

R330

100K

R379

33

R329

33R348

39K

R327 8.2K

R328

39K

R378 39K

R398

39K

R377

8.2K

R396

470

R395

470

R390

560

R391

560

R753

0

R730

10K

C309

105M

C359

105M

C541

C542

101J

C521

C529

C522

C520

C519

C517

C518

C706

104Z

C702

104Z

C705 104Z

C703

104Z

C704

104Z

C701

104Z

C755

103K

C372

47/16

C322

47/16

C360

22/6

.3

C310

22/6

.3

C321

10/16

C37110/16C

306

470/6

.3

Q383

NJM3414A

(1/2)

3 8

2

1

Q383

NJM3414A

(2/2)

5

6

4

7

Q382

RN1444-A

Q381

RN1444-A

R326

50K

(A)

(1/2

)

R326

50K

(A)

(2/2

)

D702

UDZ3.3B

Q704

BR

24C

16F

GND4

S01

S12

S23 SCL 6

SDA 5

VCC 8

WC 7

Q705

BR

24C

16F

GND4

S01

S12

S23 SCL 6

SDA 5

VCC 8

WC 7

Q754

TC7WU04

6 2

R754

6.8

K

R718

10K

R715

10K

R716

10K

R717

10K

R708

10K

R703

10K

R704

0

R743

0R

702

10K

R706

10K

R746

15K

R701 2.7K

R700 10K

R705 10K

R713 10K

R709

390

R710

470

R711

820

R729

10KR707

0

R744 6.8K

R745

3.9K

Q385

RN

2401

Q711

RN2401

CD

CD

CR

ST

MC

U_M

UT

E

MIC

/LIN

E

INH

MO

DE

CD

CD

+

P_O

N_R

ST

OP

T/C

OA

X

WIN

/MA

C

WIN

/MA

C

+5D

I2C

_S

DA

I2C

_S

CL

ON

K/K

OR

G

PR

OT

EC

T

PO

WE

RM

OD

E

EP

RO

M_W

R

EP

RO

M_W

R

I2C

_S

CL_D

I2C

_S

DA

_D

I2C

_S

CL_A

I2C

_S

DA

_A

DIG

/AN

A

I2C_SCL_A

I2C_SDA_A

EPROM_WR

OPT/COAX CDCRST

UP_LED SRC_DA

I2C_SCL_DMCU_MUTE

I2C_SDA_D

DIT_C3

MODE

DIT_C2

I2C_SCL_ADIT_C15

I2C_SCL_DWAV/DIR

INH I2C_SDA_A

I2C_SDA_D

MIC/LINE

DIG/ANA

RE

SE

T

SR

C_LD

SR

C_R

ST

CLK

(NO USE)

(NO

US

E)

NO USE

DIGITAL

507-509 ohm

542

384,383,R381,

529,522,520,C518,

M24C

16

M24C

16

ANALOG

MONITOR

INTERNAL

OPT/COAX SW

INPUT SELCTOR

MIC

LINE

PHONES

WIN/MAC SW

SE-U55

SCHEMATIC DIAGRAM (INPUT SELECTOR : MONITOR)

DAC

C9/C15

P401

Q200

2SA1162-Y

Q201

2SC2712-Y

11 10

9 8

13 12

5 63 4

Q357

74HC04

1 2

7

14

Q902SI-3033LUS

GI O

Q903

SI-3033LUS

GI O

Q901

SI-3050F

G

1

INOVC VOS

E903

C200

102J

Q402

CS

8404A

C/SBF 10

C6/C2 4

C7/C3 1

CBL/SBC15

EM0/C914

EM1/C813

FSYNC 7GND18

M021

M122

M223

MCK 5

SCK 6

SDATA 8

TRNPT/FC124

TXN17

TXP20

U 11

V 9

VD+19

C1/FC0 3

12

PRO 2

RST16

Q753

74H

C4053 0X 12

0Y2

0Z5

1X 13

1Y1

1Z3

A 11

B 10

C 9GND8

INH6

VCC 16

VEE7

XCOM 14

YCOM 15

ZCOM4

AIL4

AIR5 CL 47

DA 46

DI1

D62

DI1

O63

DI1S

1

DI2

C60

DI2

D57

DI2

W59

DO1C

51

DO1D 50

DO1W 49

DO2C6

FO

C56

FO

D55

FO

W54

LOCK 48

VDDA13

VD

DD

652

VSSA12

VS

SD

10

53

VS

SD

11

58

VS

SD

12

61

VS

SD

1364

MODEL NO SE-U55/UE-155P901

L752

BLM

21A

102F

L751

BLM

21A

102F

L502

BLM21B221SB

L501

BLM21B221SB

L503

BLM21B221SB

L901

BLM21P221SG

L753

BLM21A102F

L754

NC

H-1

470

L401

47UH

NCH-1479

F901

ICP-S2.3

D903

SFPJ63

D2051SS352

D204

1S

S352

D203

1SS352

D202

1S

S352

D200

1SS352

D201

1SS352

D403

D901

SFPJ63

D902 SFPJ63

D401

1SS352

D402

Q905

RN1402

R511

0

R512

0

R513

0

R514

0

R515

0

R516

0

R517

0

R518

0

R519

0

R502

0

R504

0

R503

0

R407

75

R501

1K

R408

75

R714

0

R907

0

R914

0.22

(1W)

R207

1K

R206

1K

R205

1K

R204

1K

R2022.2K R203

2.2K

R201

4.7K

R200

10K

R905

10K

R902

1K

R901

10K

R913

330

R911

330

R753

0

R904

10K

R903

22K

R751

1M

R912

0

R404

2.2

K

R403

2.2

K

R402

2.2

K

Q904

M51957B

CAP 5GND4

IN2

NC11

NC23

NC3 8

OUT 6

VCC 7

C546

101J

C763

C764

180J

C543

105M

C512

473Z

C511

223Z

C510

102J

C509

331J

C752

104Z

C751

104Z

C540

101J

C539

101J

C538

101J

C534

101J

C535

101J

C536

101J

C537

101J

C530

101J

C502

102J

C503

101JC

505

101J

C506

102J

C507

101J

C508

102J

C501

101J

C504

102J

C413

472K

C417

104Z

C913

104Z

C414

104Z

C202

102J

C201

102J

C768

472K

C767

103K

C766

333K

C753

050C

C904

104Z

C756

104Z

C754

050C

C755

103K

C415

104Z

C765

104Z

C905

1/5

0

C410

0.1

/50

C9100.47/50

C901

10/1

6

C206

100/1

6

C205

10/5

0

C20410/50

C203

10/50

C401

47/16

C903

470/6

.3

D904

SLR

-332M

C

U401

TORX178A

U402

TOTX178

Q751

UDA1325

BC

K61

CLK

27

D+8

D-6

DA

57

GP0/BCKI17

GP1/DI13

GP

2/D

O63

GP3/WSO

1

GP4/BCKO2

GP5/WSI15

P0.0

56

P0.1

58

P0.2

60

P0.3

62

P0.4 64

P0.53

P0.65

P0.77

P2.014

P2.116

P2.218

P2.3

20

P2.4

22

P2.5

23

P2.6

29

P2.7

30

SCL19

SD

A21

SHTCB4

VDDE12

VDDI9

VD

DX

28

V

VR

VR

VS

SA

355

VSSE11

VSSI10

VS

SX

24

WS

59

XT

AL1A

54

XT

AL1B

25

XT

AL2A

53

XT

AL2B

26

PS

EN

31

X751

48M

D406

D405

UD

Z3.3

B

D404

C412

22/1

6

L402

NSRF-2046

Q754

TC7WU04

1 7

4

8

Q754

TC7WU04

6 2

Q754

TC7WU04

3 5

R411 680

R410 680

R409 680

R414

1.5

K

R413

1.5

K

R412

1.5

K

01

7

+3.3D

+3.3A

+5A

RE

SE

T

DI

DO

BCKI

WSI+5D

BCKO

128FS

DIT

_C

3

DIT

_C

2

DIT

_C

15

UP_LED

SR

C_D

A

SR

C_LD

SR

C_R

ST

CLK RESET

WAV/DIR

BCKO

WSO

DO

R714 100

UDDUJJ

BK1608LL241-T

C534-540

R511-519ohm

544-546101J

NO USE

101JC530

UJJ UDD

UJJ UDD

(UDD= )

C905

C543

UJJ UDD

ohm

C502,504,506,508

R502-504

C512

C511

C510

C509

L501-503

C501,503,505,507

0

UJJ UDD

NC

OUTPUT

OPTICAL

INPUT

OPTICAL

1.5A

7.5V

DC IN

COAXIAL

INPUT

OUTPUT

GND

SE-U55

SCHEMATIC DIAGRAM (INPUT SELECTOR : MONITOR)

L807

4BLH-CUM05R5CN1

Q401

TDA1373H

AIL4

AIR5

AOL19

AOR115

BS 34

CEN 35

CL 47

CLD18

CLI

23

CLO

127

CLO

228

CLO

330

CLO

431

CUS 36

DA 46

DI1

D62

DI1

O63

DI1S

1

DI2

C60

DI2

D57

DI2

W59

DO1C

51

DO1D 50

DO1W 49

DO2C6

DO2D10

DO2W16

EM 37

FO

C56

FO

D55

FO

W54

FS

L25

LD 45

LOCK 48

MU 44

SA 43

TST1 42

TST2 41

VDDA13

VDDA4

19

VDDD17

VDDD211

VDDD314

VD

DD

4

32

VDDD5 39

VD

DD

652

VSSA12

VS

SA

4

20

VSSD18

VS

SD

10

53

VS

SD

11

58

VS

SD

12

61

VS

SD

1364

VSSD212

VSSD313

VSSD417V

SS

D5

24

VS

SD

626

VS

SD

729

VSSD8

33

VSSD9 40

XT

LI

21

XT

LO

22

RST 38

L801BLM21P221SG

L802

L754

NC

H-1

470

F801

ICP-S1.0

D710

1S

S352

R837 0

R819 1.5K

R838 0

R802 15

R801 15

R908

0.33 (1W)

R846 0

R847 0

R415

560

R405

1M

R753

0

R751

1MR404

2.2

R403

2.2

R402

2. 2

C911

104Z

C534

101J

C535

101J

C536

101J

C537

101J

C912

104Z

C768

472K

C419

103K

C418 223K

C409104Z

C405

080D

C406

080D

C403

104Z

C767

10

C76

C753

050C

C754

050C

C755

103K

C402

104Z

C404

104Z

C420

220/6

.3

C401

47/16

X401

33.8688MHZ

X751

48M

P801

+V 1

D+ 3

D- 2

GND 4 D802

UDZ5.6B

D801

UDZ5.6B

4Q754

TC7WU04

6 2

Q754

TC7WU04

3 5

R401

4.7

+3.3D

+5D

D1+

I2C

_S

CL

I2C

_S

DA

D1-

CD

CD

+

+5D

+3.3D

4BLH-CUN05R5BN1

UJJ UDD

0ohmR846,847

L807

NCAR-7035

USB UP

INPUT SELECTOR : MONITOR

BY MARK ARE CRITICAL FOR SAFETYIDENTIFIED

NOTE

THE COMPONENTS

REPLACE ONLY WITH PART NUMBER SPECIFIED.

.

. VOLTAGE (MEASURED WITH VOLTMETER) IS DC VOLTAGE. (NO INPUT SIGNAL)

. ALL PNP TRANSISTORS ARE EQUIVALENT TO 2SA1015-GR UNLESS OTHERWISE NOTED.

. ALL NPN TRANSISTORS ARE EQUIVALENT TO 2SC1815-GR UNLESS OTHERWISE NOTED.

. ALL DIODES ARE EQUIVALENT TO 1SS133 UNLESS OTHERWISE NOTED.

. ELECTROLYTIC CAPACITORS ( ) ARE IN F/WV.

. ALL CAPACITORS ARE IN pF/50WV UNLESS OTHERWISE NOTED.

EX) 030 3pF 330 33pF 331 330pF

u

ALL RESISTORS ARE IN OHMS 1/4WATTS UNLESS OTHERWISE NOTED.

. THE THICK LINES ON PC BOARD ARE THE PRINTING SIDE OF THE PARTS.

EX) PRINTING SIDE

CIRCUIT IS SUBJECT TO CHANGE FOR IMPROVEMENT..

.333 0.033uF

SE-U55

SCHEMATIC DIAGRAM (INPUT SELECTOR : MONITOR)

DAC

4BLH-CUM05R5CN1

L504

4BLH-CUN05R5BN1

P303

P302

P301

E902

E901

C307

221K

C305

331K

C374

101J

C324

101J

C366

152J

C316

152J

C368

152J

C318

152J

Q752

74H

C4053 0X 12

0Y2

0Z5

1X 13

1Y1

1Z3

A 11

B 10

C 9GND8

INH6

VCC 16

VEE7

XCOM 14

YCOM 15

ZCOM4

SCHEMATIC DIAGRAMUE-155

L516

BLM21P221SG

L506

BLM21P221SG

BLM21P221SG

L355

BLM21P221SG

L356

BLM21P221SG

L351

BLM21P221SG

L352

BLM21P221SG

L353

BLM21P221SG

L302

BLM21P221SG

L301

BLM21P221SG

L753

BLM21A102F

L754

NC

H-1

470

13

D2051SS352

D204

1S

S352

D203

1SS352

D202

1S

S352

D751

1S

S352

R523 0

R522 0

R521 0

R311

0

R356

0

R355

0

R520

0

R510

0

R372

470

0

R505

0

R303

0

R324

330K

R374

330K

R317

0

R312

0

R322

470

R373

470

R323

470

R309

0

R506

0

R301

330K

R307

4.7

K

R305

680

R304

100K

R302

1K

R308

33K

R392

1K

R306

1K

R327 8.2KR377

R387

6.8K

R337

6.8K

R347

100K

R714

R397

100K

R338

10K

R351

33

R352

33

R388

10K

R314

0

R389 22K

R364

0

R339 22K

R365

33K

R315

33K

R336

22K

R385

82K

R335

82K

R386

22K

R393

33

R343

33

R310

100K

R361

100K

R362

100K

R325

4.7

K

R375

4.7

K

R332

100K

R382

100K

R32010K

R370

10K

R318

2.2K

R319

2.2K

R368

2.2K

R369

2.2K

R321

4.7K

R371

4.7K

R334

33

R394

33

R316

100K

R753

0

R366

100K

(NO

US

E)

R752

10K

C548

101J

C547

102J

C525

102J

C526

101J

C523

102J

C556

101J

C555

102J

C527

102J

C528

101J

C524

101J

C544

101J

C545

101J

C546

101J

C763

180J

C762

104Z

C764

180J

102J

101J

C538

101J

C515

102J

C516

101J

C514

101J

C513

102J

C519

C517

C518

C551

102J

C552

101J

C554

101J

C553

102J

C756

104Z

C755

103K

C303

47/1

6

C302

100/6

.3

C315

47/16

C365

47/16

C352

220/16

C358

220/6

.3

C308

220/6

.3

C363

47/16

C313

47/16

C304 47/16

C311

10/1

6

C757

10/16

C761

220/6

.3

C351

220/1

6

C361

47/16

C362

47/16 C369

47/16

C319

47/16

C206

100/1

6

C205

10/5

0

C331

47/16

C332

47/16

C760 10/16

C758

10/16

C759

10/16

Q751

UDA1325

ALE 50

CLK

27

DA

57

NC1 45

NC2 46

P0.0

56

P0.1

58

P0.2

60

P2.6

29

P2.7

30

RTCB 36

TC 35

VDDA1 38

VDDA2 42

VD

DA

352

VD

DO

32

VD

DX

28

VINL 43

VINR 47

VOUTL 34

VOUTR 37

VREF[AD] 41

VREF[DA] 40

VRN 49

VRP51

VSSA1 39

VSSA2 44

VS

SA

355

VSSO 33

VS

SX

24

WS

59

XT

AL1A

54

XT

AL1B

25

XT

AL2A

53

XT

AL2B

26

EA 48

PS

EN

31

Q301

NJM4565M-D

(1/2)

38

2

1

Q359

NJM2140R

(1/2)

58

6

7

Q358

NJM

2140R

(1/2

)

38

2

1

Q352

NJM2140R

(1/2)

3 8

2

1

Q301

NJM4565M-D

(2/2)

5

6

4

7

Q359

NJM2140R(2/2)

3

2

4

1

Q358

NJM

2140R

(2/2

)

5 6

4

7

Q352

NJM2140R

(2/2)

5

6

4

7

Q389

RN1444-A

Q388

RN1444-A

Q387

RN1444-A

Q386

RN1444-A

Q353

RN1444-A

Q354

RN1444-A

R313

50K

(A)

(2/2

)

R313

50K

(A)

(1/2

)

D206

UD

Z5.6

B

C301

4.7/35

Q754

TC7WU047

Q754

TC7WU04

6 2

+5A

-5V

+3.3D +3.3A

+5A

-5V

CD

CR

ST

U55UJJ 155UJJ U55UDD

R521

R522

R523

UDDUJJ

ohm309, 506505,R303,

C514,516

C513,515

L301,302

L504

Rch

Lch

520

556

555

548, 554,552,

547, 553,551,

510,356,

C523, 527,525,

355,317,312,R311,

528,526,C524,

L351-353,355,356,506,516

(ECHU)

541

Rch

Lch

507-509 ohm

542

384,383,R381,

529,522,520,C518,

521,519,C517,

L505

L381-383

UDDUJJ

ohm

UDDUJJ

Lch

Lch

Rch

Rch

R(1VrmsFS)

L(1VrmsFS)

MIC IN

LINE OUT

R(2VrmsFS)

LINE IN

L(2VrmsFS)

-5V

GND

GND

SE-U55

SCHEMATIC DIAGRAM (INPUT SELECTOR : MONITOR)

L505

Q706

74HCT700734

Q706

74H

CT

7007

11

10

Q706

74H

CT

7007

98

Q706

74H

CT

7007

56

Q706

74H

CT

7007

13

12

7

Q706

74HCT7007

1214

PO

WE

R M

OD

E

OPT/COAX

NC

I2C

_S

DA

_D

I2C

_S

CL_D

MCU_MUTE

UPLED

PR

OT

EC

T

I2C_SCL_A

I2C_SDA_A

DIG/ANA

INH

Outp

ut o

nly

MB89135A

MIC/LINE

MODE

AVR

Avss

EP

RO

M_W

R

WIN

/MA

C

CD

CD

+

ON

K/K

OR

G

P_O

N_R

ST

CDCRST

DRC_DA

DIT_C3

SR

C_R

ST

DIT

_C

15

WA

V/D

IR

DIT_C2

SR

C_LD

CLK

X1A

AVcc

Nch

Open d

rain

Vss

X0A

Vcc

X1

X0

MO

D1

MO

D0

RS

T

Q701

1 2 3 4 5 6 7 8 9 10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

S703

X701

4MHZ

S701

S702

E904

P702

Q708

74H

C4053 0X 12

0Y2

0Z5

1X 13

1Y1

1Z3

A 11

B 10

C 9GND8

INH6

VCC 16

VEE7

XCOM 14

YCOM 15

ZCOM4

P381

L383

L382

L381

L754

NC

H-1

470

D301

SF

PJ6

3D701

1SS352

Q384

RN1402

R381

0

R508

R509

R507

R384

R383

R380

100K

R330

100K

R379

33

R329

33R348

39K

R327 8.2K

R328

39K

R378 39K

R398

39K

R377

8.2K

R396

470

R395

470

R390

560

R391

560

R753

0

R730

10K

C309

105M

C359

105M

C541

C542

101J

C521

C529

C522

C520

C519

C517

C518

C706

104Z

C702

104Z

C705 104Z

C703

104Z

C704

104Z

C701

104Z

C755

103K

C372

47/16

C322

47/16

C360

22/6

.3

C310

22/6

.3

C321

10/16

C37110/16C

306

470/6

.3

Q383

NJM3414A

(1/2)

3 8

2

1

Q383

NJM3414A

(2/2)

5

6

4

7

Q382

RN1444-A

Q381

RN1444-A

R326

50K

(A)

(1/2

)

R326

50K

(A)

(2/2

)

D702

UDZ3.3B

Q704

BR

24C

16F

GND4

S01

S12

S23 SCL 6

SDA 5

VCC 8

WC 7

Q705

BR

24C

16F

GND4

S01

S12

S23 SCL 6

SDA 5

VCC 8

WC 7

Q754

TC7WU04

6 2

R754

6.8

K

R718

10K

R715

10K

R716

10K

R717

10K

R708

10K

R703

10K

R704

0

R743

0R

702

10K

R706

10K

R746

15K

R701 2.7K

R700 10K

R705 10K

R713 10K

R709

390

R710

470

R711

820

R729

10KR707

0

R744 6.8K

R745

3.9K

Q385

RN

2401

Q711

RN2401

CD

CD

CR

ST

MC

U_M

UT

E

MIC

/LIN

E

INH

MO

DE

CD

CD

+

P_O

N_R

ST

OP

T/C

OA

X

WIN

/MA

C

WIN

/MA

C

+5D

I2C

_S

DA

I2C

_S

CL

ON

K/K

OR

G

PR

OT

EC

T

PO

WE

RM

OD

E

EP

RO

M_W

R

EP

RO

M_W

R

I2C

_S

CL_D

I2C

_S

DA

_D

I2C

_S

CL_A

I2C

_S

DA

_A

DIG

/AN

A

I2C_SCL_A

I2C_SDA_A

EPROM_WR

OPT/COAX CDCRST

UP_LED SRC_DA

I2C_SCL_DMCU_MUTE

I2C_SDA_D

DIT_C3

MODE

DIT_C2

I2C_SCL_ADIT_C15

I2C_SCL_DWAV/DIR

INH I2C_SDA_A

I2C_SDA_D

MIC/LINE

DIG/ANA

RE

SE

T

SR

C_LD

SR

C_R

ST

CLK

(NO USE)

(NO

US

E)

NO USE

DIGITAL

507-509 ohm

542

384,383,R381,

529,522,520,C518,

M24C

16

M24C

16

ANALOG

MONITOR

INTERNAL

OPT/COAX SW

INPUT SELCTOR

MIC

LINE

PHONES

WIN/MAC SW

SE-U55

PC BOARD VIEW PARTS LIST

CIRCUIT NO. DESCRIPTION PART NUMBERD200~D205 1SS352, C-DIODE or 223234R2 or 1SS355, C-DIODE 223269R2D206 UDZ5.6B, ZENER D 224490560R2D301 SFPJ-63, DIODE 223271R2D401~D403 1SS352, C-DIODE or 223234R2 or 1SS355, C-DIODE 223269R2D404~D406 UDZ3.3B, ZENER D or 224490330R2 or RD3.3SB2, ZENER D 224370332R2D701 1SS352, C-DIODE or 223234R2 or 1SS355, C-DIODE 223269R2D702 UDZ3.3B, ZENER D or 224490330R2 or RD3.3SB2, ZENER D 224370332R2D710, D751 1SS352, C-DIODE or 223234R2 or 1SS355, C-DIODE 223269R2D801, D802 UDZ5.6B, ZENER D 224490560R2D901~D903 SFPJ-63, DIODE 223271R2D904 SLR-332MC3F, LED 225332F801 ICP-S1.0, FUSE 252223R2F901 ICP-S2.3, FUSE 252226R2L301, L302 BLM21P221SG, CHOKE COIL 230949R2L351~L353 BLM21P221SG, CHOKE COIL 230949R2L355, L356 BLM21P221SG, CHOKE COIL 230949R2L381~L383 BLM21P221SG, CHOKE COIL 230949R2L401 NCH-1479, CHOKE COIL 231237K470R2L402 NSRF-2046, MPX COIL 232136L501 BLM21B221SB, CHOKE COIL 230947R2L504, L505 NMBL-003, BLN COIL 233532R2L506, L516 BLM21P221SG, CHOKE COIL 230949R2L751~L753 BLM21A102F, CHOKE COIL 230948R2L754 NCH-1470, CHOKE COIL 231237M015R2L801, L802 BLM21P221SG, CHOKE COIL 230949R2L807 NMBL-003, BLN COIL 233532R2P301 YKB21-5181, JACK 25045579P302, P303 NPJ-2PDR446, PIN JACK 25045641P381 YKB21-5182, JACK 25045388P401 NPJ-2PDO445, PIN JACK 25045640P801 NSCT-4P2179, SOCKET 25052282P901 HEC0470-01-630, JACK 25045598Q200 2SA1162-Y, TR 2214374R2Q201 2SC2712-Y, TR 2213144R2Q301 NJM4565M-D, IC 22241383R2Q352 NJM2140R, IC 22241311R2Q353~Q354 RN1444-A, TR 2216031R2Q357 74HC04, IC 222740045R2Q358 NJM2140R, IC 22241311R2Q359 NJM2140R, IC 22241311R2Q381~Q382 RN1444-A, TR 2216031R2Q383 NJM3414AV, IC 22241469R2Q384 RN1402, TR 2214470R2Q385 RN2401, TR 2214520R2Q386~Q389 RN1444-A, TR 2216031R2Q401 TDA1373H, IC 22241428R3Q402 CS8404A, IC 22241429R2Q701 MB89135L-611, IC 22241557AR2Q704 M24C16-WMN6T, IC or 22241431R2 or BR24C16F, IC 22241430R2Q705 M24C16-WMN6T, IC or 22241431R2 or BR24C16F, IC 22241430R2Q706 TC74HCT7007AF, IC 222740077R2TOQ708 TC74HC4053FP, IC 22241228R2

CIRCUIT NO. DESCRIPTION PART NUMBERQ711 RN2401, TR 2214520R2Q751 UDA1325H, IC 22241312R3Q752, Q753 TC74HC4053FP, IC 22241228R2Q754 TC7WU04FU, IC 22240935R2Q901 SI-3050F, IC 22241561Q902, Q903 SI-3033LUS, IC 22278033CR2Q904 M51957BFP, IC 22241239R2Q905 RN1402, TR 2214470R2R313, R326 N09RGL50KA20F, VARI R 5112486R511~R519 BK1608LL241-T, EMIFIL 230959R1R908 RNU1WCJ-0.33, METAL R 453633394R914 RNU1WCJ-0.22, METAL R 453632294S701, S702 NSS-22203, SLIDE SW 25065581S703 NRSF-224-20U, ROT SW 25030419U401 TORX178B, PHT CP 24120037U402 TOTX178A, PHT PARTS 24120031X401 HC-49U/03 33.8688MHz, 3010325 CRYSTALX701 CST4.00MGW, CERA LOCK 3010150X751 HC-49/U03 48.000MHz, 3010328 CRYSTAL

SE-U55

Microprocessor terminal descriptions

No. Pin Name I/O Function1 3.3V +3.3V2 RESET I Reset input (RESET:"L")3 GND I GND4 GND I/O GND5 4MHz I External 4MHz clock input6 4MHz I External 4MHz clock input7 3.3V +3.3V8 GND GND9 X1A Open10 CLK O CLK signal output of SRC(TDA1373H)11 SRC_LD O LD signal output of SRC(TDA1371H)12 SRC_RESET O Reset output of SRC(TDA1373H)

13 WAV/DIR O CODEC output (WAVE or MONITOR) select signal output(WAVE : "H")

14 DIT C15 O To DIT C15pin15 DIT C2 O To DIT C2pin16 (NO USE) O Open17 DIT C3 O To DIT 3pin18 (NO USE) I GND19 GND GND20 SRC_DA I/O Serial data of SRC81373H) input/output21 CODEC RST I/O To VREF of USB CODEC(UDA1325)22 DIG_ANA O EEPROM for USB CODEC select signal output23 I2C SDA A I/O SDA port for EEPROM writing.24 I2C SCL A I/O SCL port for EEPROM writing.

25 I2C SDA D I/OSDA port for EEPROM writing for DIGITAL setup. Usually, itconsiders as an input and becomes SDA input and output at thetime of writing.

26 I2C SCL D I/O SCL port for EEPROM writing for DIGITAL setup. Usually, itconsiders as an input and becomes SCL output at the time of

27 (NO USE) I GND

28 EPROM WR I/OEEPROM write-in control port. Usually, it is an input port, andimmediately after reset, when this is "L", "L" is outputted andEEPROM is written in.

29 (NO USE) I GND30 MAC/WIN I The setting switch (H:WIN, L:MAC) of WIN/MAC.31 ONK/KORG I Copyright output protection. (H:normal mode)32 PROTECT I Existence of copyright protection information. (H:normal mode)33 PON_RST O Power-on reset.

34 CODEC D+ I/O D+ of USB CODEC (UDA1325) is controlled. Usually, it is "H"and D+ is grounded through a diode by "L."

35 (NO USE) I GND

36 POWER MODE I A setup of POWER MODE of USB.L: BUS POWER H:SELF POWER.

37 (NO USE) I GND38 (NO USE) I GND39 (NO USE) I GND

40 OPT/COAX I The change switch of OPTICAL and COAXICAL.H: COAXICAL and L:OPTICAL.

41 UPLED O Light Emitting Diode display of UP (the light is switched on by42 MCU MUTE O MCU_MUTE (it is MYUTO operation at "L").43 GND GND44 3.3V 3.3V

45 MODE I The change switch of MONITOR/INTERNAL/LINE/MediaInterface Connector.

46 (NO USE) O GND47 INH O Prohibition of an analog input (it forbids by "H").

48 MIC/LINE O An input change of Media Interface Connector/LINE.H: Media Interface Connector, L:LINE.

SE-U55

PACKING-1

Assembly Method

1 Factory-shipped conditionFUNCTION SELECTOR dial LINEINPUT LEVEL adjustment dial MINPHONES LEVEL adjustment dial MINDIGITAL IN COAX/OPT selector OPT (Rear side)WIN/MAC selector WIN (Bottom side)

2 Serial No. of LABEL(POS) AS is stuck on CASE (R).

3 A set is put into POLY BAG, and a tape is stuck and it fixes.It is staging the printing side of POLY BAG, putting in a set, and bending a portion to CASE (R) side not much.

Parts Number Parts Name29362765 LABEL(POS)AS29100097-1A POLY BAG(350 X 250)29110149 TAPE(SEROHAN)

FUNCTION SELECTOR dial LINE

INPUT LEVEL adjustment dial MIN

PHONES LEVEL adjustment dial MIN DIGITAL IN COAX/OPT selector OPT

WIN/MAC selector WIN (Bottom side)

UP

FUNCTION SELECTOR

INTERNAL LINEMIC

MONITOR

DIGITAL

INPUT LEVEL

PHONE LEVEL

MAX

MAX

MIC

PHONES

USB DIGITAL AUDIO PROCESSORSE-U55

WINMAC

IN

OUT

IN

OUT

OPTICAL

COAXIAL

DIGITAL

UP USB

DIGITAL IN

DC IN 7.5V

ANALOG

COAX

OPT

L

R

L

R

LINE OUT

LINE IN

LABEL(POS)AS

TAPE (SEROHAN)

SE-U55

PACKING-2

PIN CORD AS(0.8MT)

Assembly Method

4 It puts in in the order of INS MANUAL J(SE-U55),INS MANUAL J(CarryOnMusic),WRANTY CARD,CD-ROM(SE-U55),CORD AS(NCS-1P150),CORD AS(USB-1M),PIN CORD AS into POLY BAG, and fixes on a tape.*) POLY BAG is turning a character side down.

Parts Number Parts Name29100097-1A POLY BAG(350 X 250)28343006 INS MANUAL J(SE-U55)29343043 INS MANUAL J(CarryOnMusic)292163 CD ROM(SE-U55)29365075B WRNTY CARD2050066 CORD AS(NCS-1P150)2010391 CORD AS(USB-1M)2010385 PIN CORD AS(0.8MT)29110149 TAPE(SEROHAN)

CORD AS(USB-1M)

CORD AS(NCS-1P150)

CD ROM(SE-U55)

INS MANUAL J(CarryOnMusic)

INS MANUAL J(SE-U55)

POLY BAG(350 X 250)

WRNTY CARD

TAPE(SEROHAN)

SE-U55

Packing-3

Assembly Method

5 Put the unit into assembled PAD (IN).6 Assemble CARTON (IN).7 Put PAD (IN) AS into assembled CARTON (IN).8 Put Catalog AS into assembled CARTON (IN).

Parts Number Parts Name29091959 PAD (IN)29053665A CARTON (IN)

PAD (IN)UNIT

Catalog ASPAD (IN) AS

CARTON (IN)

SE-U55

Packing-4

Parts Number Parts Name29362778A LABEl(D)29053666 CARTON(OUT)29095891 SHEET(D)

Top side : PP tape

CARTON (IN)

CARTON (IN)

LABEL (D)

LABEL (POS) AS

SHEET (D)

CARTON (OUT)

SE-U55

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ONKYO U.S.A. CORPORATION18 Park Way, Upper Saddle River, N.J. 07458, U.S.A.Tel: 201-785-2600 Fax: 201-785-2650 E-mail: onkyo@onkyousa.com

Sales & Product Planning Div. : 2-1, Nisshin-cho, Neyagawa-shi, OSAKA 572-8540, JAPANTel: 072-831-8111 Fax: 072-833-5222

ONKYO CORPORATION

PN 0M3692