Service Manual for KENWOOD SW-501

SPECIFICATIONS

POWERED SUBWOOFER

103SW/SW-301

1050SW/SW-501

SERVICE MANUAL

Knob

(K29-0577-08)

KENWOOD badge

(B43-0302-04)

Knob

(K29-0573-08)

RCA pin jack

(E23-0224-08)

Speaker terminal

(E21-0279-08)

Panel *

(A29-)

Cloth frame assy

(B06-1144-08)

Note : Refer to SW-900 service manual(B51-4228-00) if you need

the microprocessor information.

Power cord bushing

(J42-0234-08)

AC power cord*

(E30-)

Window

(B10-3302-08)

Knob

(K29-0578-08)

Knob

(K29-0576-08)

1050SW(SW-501)

103SW(SW-301)

Amplifier

Power output

150 watts RMS into 4 ohms,

100 watts RMS into 4 ohms,

from 20 Hz to 200 Hz, with no

from 20 Hz to 200 Hz,with no

more than 0.09%total

harmonic distortion

Phase switching

Normal, Reverse

Input sensitivity and input impedance

RCA-type jack

70 mV (12 k-ohms)

Push-type terminals

1.7 V(15 k-ohms)

Supply voltage

AC 110 V~120 V (1050SW)

AC 110 V~120 V(103SW)

Rated power consumption

150 watts

110 watts

Speaker

Enclosure

Ported

Speaker units

12 in (300 mm) polypropylene

10 in (250 mm) polypropylene

cone

Nominal impedance

4 ohms

Width

14.3 in (363 mm)

11.8 in (300 mm)

Height

21.7 in (550 mm)

18.9 in (480 mm)

Depth

18.9 in (480 mm) with grille

15.6 in (395 mm)

Net weight

53 lb (24 kg)

40 lb (18 kg)

Since Kenwood follows a policy of continuous advancement in development, these specifications may change without notice.

Slide switch

(S62-0207-08)

* Refer to parts list on page 8.

103SW/SW301(K) COVER( 98.4.24 20:44 y[W 2

103SW/SW-301/1050SW/SW-501

CONTENTS/DISASSEMBLY FOR REPAIR/ADJUSTMENT

DISASSEMBLY FOR REPAIR

ADJUSTMENT

2

SPECIFICATIONS ........................................Top cover

CONTENTS ............................................................... 2

DISASSEMBLY FOR REPAIR....................................2

ADJUSTMENT ............................................................2

PC BOARD ................................................................ 3

SCHEMATIC DIAGRAM ............................................ 5

EXPLODED VIEW ......................................................7

PARTS LIST................................................................8

Contents

1

2

3

x3

Dc voltmeter

5 mV

R611

(a)

No.

ITEM

INPUT

SETTINGS

OUTPUT

SETTINGS

AMPLIFIER

SETTINGS

ALIGNMENT

POINTS

ALIGN FOR

FIG.

Unless otherwise specified, the individual switches should be set as following :

POWER : ON

NO SIGNAL INPUT

1

IDLE CURRENT

Connect a DC

voltmeter to

R611

VOLUME : 0

VR601

5 mV

(a)

< How to remove the front panel >

1. Remove the decoration plate (1) by a pincette to the bottom of

the front panel, then remove the 3 screws (2).

2. 103SW/SW-301: Remove the front panel in the upper slanting

direction of the arrow (3).

1050SW/SW-501 : Remove the front panel just the frontwards.

103SW/SW301(K) COVER( 98.4.24 20:44 y[W 3

ACE

G

I

BD

F

H

J

2

1

3

5

7

4

6

Refer to the schematic diagram for the value of resistors and capacitors.

PC BOARD(Component side view)

3

4

103SW(K) PCB/SD 98.4.24 20:40 y[W 1

R614

R631

R663

R801,2

R851

R871

R872

SW902A

D801

Q602

Q603

82K/120K

18K/22K

820/1.5K

4.7/4.7

220/-

4.7/-

X/X

D3SBA20/D5SBA20

2SC5198/2SC3281 (R)

2SA1941 (R) /2SA1302 (R)

82K/120K

18K/22K

820/1.5K

4.7/4.7

220/-

4.7/-

X/X

D3SBA20/D5SBA20

2SC5198/2SC3281 (R)

2SA1941 (R) /2SA1302 (R)

82K/120K

18K/22K

820/1.5K

4.7/4.7

220/-

10/-

X/X

D3SBA20/D5SBA20

2SC5198/2SC3281 (R)

2SA1941 (R) /2SA1302 (R)

82K/120K

18K/22K

820/1.5K

4.7/4.7

220/-

10/-

X/X

D3SBA20/D5SBA20

2SC5198/2SC3281 (R)

2SA1941 (R) /2SA1302 (R)

82K/120K

18K/22K

820/1.5K

4.7/4.7

220/-

10/-

X/X

D3SBA20/D5SBA20

2SC5198/2SC3281 (R)

2SA1941 (R) /2SA1302 (R)

82K/120K

15K/18K

560/-

-/-

180/-

4.7/-

X/X

D3SBA20/D5SBA20

2SC5198/2SC3281 (R)

2SA1941 (R) /2SA1302 (R)

56K/-

15K/-

560/-

-/-

180/-

4.7/-

X/-

D3SBA20/-

2SC5198/-

2SA1941 (R) /-

56K/75K

15K/18K

560/-

-/-

180/-

4.7/-

O/O

D3SBA20/D5SBA20

2SC5198/2SC3281 (R)

2SA1941 (R) /2SA1302 (R)

56K75K

15K/18K

560/-

-/-

180/-

4.7/-

O/O

D3SBA20/D5SBA20

2SC5198/2SC3281 (R)

2SA1941 (R) /2SA1302 (R)

82K/-

18K/-

820/-

4.7-

220/-

220-

10/-

O/-

D3SBA20/-

2SC5198/-

2SA1941 (R) /-

56K/75K

15K/18K

270/270

-/-

180/180

4.7/4.7

X/X

D3SBA20/D5SBA20

2SC5198/2SC3281 (R)

2SA1941 (R) /2SA1302 (R)

DESTINATION

C204

C207

C631

F901

F902,3

F904

R206

R603

R606

R613

COUNTRY

ABB

USA

K

0.047UF/0.056UF

0.047UF/0.039UF

100U10/220U16

3.15A/4A

0.8A/0.8A

-/-

12K/27K

1K/820

-/1K

220K/270K

CANADA

P

0.047UF/0.056UF

0.047UF/0.039UF

100U10/220U16

3.15A/4A

0.8A/0.8A

-/-

12K/27K

1K/820

-/1K

220K/270K

EUROPE

E

0.047UF/0.056UF

0.047UF/0.039UF

100U10/220U16

1.6A/2A

0.8A/0.8A

-/-

12K/27K

1K/820

-/1K

220K/270K

ENGLAND

T

0.047UF/0.056UF

0.047UF/0.039UF

100U10/220U16

1.6A/2A

0.8A/0.8A

-/-

12K/27K

1K/820

-/1K

220K/270K

GERMANY

G

0.047UF/0.056UF

0.047UF/0.039UF

100U10/220U16

1.6A/2A

0.8A/0.8A

-/-

12K/27K

1K/820

-/1K

220K/270K

AUSTRALIA

X

0.047UF/0.056UF

0.047UF/0.039UF

100U10/220U16

1.6A/2A

0.4A/0.4A

-/-

12K/27K

1K/820

-/1K

180K/180K

CHINA

C

0.047UF/-

100U10/-

1.6A/-

0.4A/-

-/-

12K/-

1K/-

-/-

180K/-

GENERAL MARKET

M

0.047UF/0.056UF

0.047UF/0.039UF

100U10/220U16

1.6A/2A

0.4A/0.4A

1.6A/2A

12K/27K

1K/820

-/1K

180K/180K

MALAYSIA

I

0.047UF/0.056UF

0.047UF/0.039UF

100U10/220U16

1.6A/2A

0.4A/0.4A

1.6A/2A

12K/27K

1K/820

-/1K

180K/180K

PX

Y

0.047UF/-

100U10/-

1.6A/-

0.8A/-

1.6A/-

12K/-

1K/-

-/-

220K/-

JAPAN

J

0.047UF/0.056UF

0.047UF/0.039UF

100U10/220U16

3.15A/4A

0.4A/0.4A

-/-

12K/27K

1K/820

-/1K

15K/18K

A

B

D

F

H

J

C

E

G

I

2

1

3

5

7

4

6

Y19-3900-10

103SW/SW-301/1050SW/SW-501

0.6V

-7.8V

5.1V

0.7V

DOWN

6.7V

DOWN

8.0V

15.3V

0V

6.6V

UP

7.1V

6.6V

UP

0V

4.9V

5.0V

0.2V

4.4V

1.4V

5.0V

0V

5.0V

0V

5.0V

2.3V

2.4V

5.0V

5.6V

15.3V

21.3V

15.2V

15.8V

-16.1V

-24.9V

-15.5V

5.2V

MUS:5.2V

MOV:0V

REV:0V

NOR:5.2V

-15.5V

15.2V

-5.1V

5.2V

-15.5V

15.2V

-15.5V

15.2V

3.5V

2.2V

0V

-0.4V

0V

-6.3V

+2.1V

-0.4V

0V

-0.3V

-1.3V

-0.7V

0.5V

0V

-0.5V

0.5V

0.3V

0V

5.1V

0.4V

0.7V

4.9V

-7.8V

0V

4.5V

0.4V

15.4V

0.3V

0.8V

0.3V

1.8V

0.3V

2.0V

1.0V

0V

INPUT/FILTER (210-6415-160)

1050SW/SW-501

103SW/SW-301

210-6415-150

(210-6415-140)

U-COM (210-6415-130)

POWER AMP (210-6415-110)

IC601

IC204

IC851

IC651

IC402

IC401

IC404

IC441

IC403

-15V

-5V

220P

C228

1K

VR601

S IN

GND

DET

-V

GND

+V

GND

AC-H2

-56.4V

-46.3V

A

55.8V

46.2V

1050

103

B

0.7V

2.3V

0V

A

B

A

B

A

C852

5.1V

0.2V

0.5V

0V

AC-H1

SIN

GND

SOUT

GND

CCW

CW

1

GND

CW

CCW

1

R410

+15V

D

GIND

CONT.B

CONT.A

PEAK

POWER

MUTE

4

8

100

Q254

10K

DET

GND

SIN

GND

SOUT

CONT.A

CONT.B

GND

+15V

-V

GND

+V

-15V

+5V

-15V

+5V

+15V

+5V

+15V

+VCC

-VCC

+VCC

-VCC

-V

+V

-5V

+5V

-5V

-15V

C241 0.01

0.01

2.2

R431

800MA 250V

0.01

C808

3

1

2

C226

220P

C227

220P

C229

220P

R233

1K

100K

R234

1

3

2

7

6

5

4

3

2

1

R254

DET.

OFFSET

VOL.DET.

2

3

LATCH SW

AUTO RECOVERY

FLIP-

FLOP

1

0.047

C225

8

VCC

DRIVER

RELAY

7

6

VCC ON

OVER LOAD

DET.

AC OFF

MUTE

5

4

R413

100K

R416

100K

R415

100K

10

9

10

9

25

26

2

1

R438

1K

R411

100K

R412

100K

R414

100K

20V/4

24.5V/4

1050

103

AC-L2

LGND

AC-L1

AC-H2

GND

AC-H1

1W

R851

100

R433

3

2

1

VD

VI

GND

25

26

T1

R434

100

5

13

6

8

4

8

4

+15V

-15V

+5V

+15V

+V

-V

-15V

+15V

2

3

1

-

+

1K

R256

R258

10K

R228

47K

R227

47K

1u50

C222

+

1u50

+

C221

R260

C240

100P

R220 100

R226

-

+

R225

R224

9.1K

50K

VR201D

120K

0.039

C220

C218

0.047

4.7K

R221

120K

VR201C

50K

R223

9.1K

R222

0.12

C219

R219

VR201B

50K

220K

9.1K

R218

0.027

C215

C214

0.12

220K

R217

R235

220K

R231 5.6K

-12dB

-24dB

+

1.5K

R230

10u25

C223

1K

R229

R259

1K

R255

R257

10K

100K

R232

7

6

5

C224

10u25

+

10K

R252

1K

R251

10K

R253

1

2

3

7

8

7

5

6

2

3

1

3

2

1

4

6

5

1

2

3

50K Cx4

7

6

5

1W

+

47u10

C878

+

C877

47u10

1K

R878

R877

1K

R871

47u25

C875

+

47u25

+

C876

100u25

+

C871

+

C872

100u25

1K

R873

R874

1K

220P

C873

470

R875

R876

470

C874

220P

100P

R210

160K

C209

0.033

R212

33K

63

1W

5W

x

2

1W

-

+

SP+

GND

+

-

Q602,603

+

R662

10K

2.2u50

C652

1K

R661

R663

R614

R615 10K

4.7K

0.047

C610

10

1W

R612

R613

R660

R664

470K

C609

100P

C608

R611

0.22

+

C611

1u50

2.7

R609

1/4W

R607 10

C607

10 1/4W

R608

C612

0.047

+

C211

0.01

100P

C212

C210

27K

R211

R213

180K

C205

0.18

C206

+

-

+

1/2W

C202

100P

0.01

C201

-

+

R113

12K

8.2K

C102

L

H

X

NOR

REV

X

H

L

MUSIC

MOVIE

B

A

MODE

12

VR201A

50K

R216

9.1K

C217 0.01

4.7K

R215

C213

0.047

VSS

C.C

C.B

C.D

C.A

VDD

SWD

SWC

SWB

SWA

22K

+

C651

4.7u50

R651

R658

12K

56K

R655

R659

22u16

+

C656

C655

47u10

68K

R657

R654

22K

+

C659

22u16

R653

22K

R652

33K

C660

+

2.7K

1u50

R656

47K

10000u

C805

+

C806

10000u

0.01

C804

C803

0.01

C802

C801

0.01

R610

1/4W

2.7

10

9

C631

+

R632

1K

+

C606

100u63

R604

16K

R631

8

7

6

12

13

14

1

2

3

5

4

C604

100P

R602

47K

C602

100P

C601

10u25

+

C603

100u25

100u63

11

1K

R606

100P

C605

R605

2.7K

10K

R854

+

C813

100u25

1/4W

R811

1.5K

+

C853

2200u16

1000P

R633 270

R852

4.7K

2.7K

R855

R853

2.7K

R801

R802

AC-L2

D GND

AC-L1

AC-H2

AC-H1

+

2200u25

C812

C811

2200u25

8

7

6

5

4

3

2

1

PEAK

POWER

MUTE

1

2

3

2

1

3

2

1

2

3

F902

F903

1

2

3

4

5

6

7

8

9

MVR401

0.01

C411

3

2

3

2

1

2

3

0.1

C405

39

L401

R425

39

R426

L402

R430

1K

R429

10K

40

R622

22K

R623

R624

100K

R621

220K

+

C851

1u50

+

R603

1K

R601

+

1u50

C621

220K

R625

C408

470u10

R424

560

R423

330

R427

R437

1K

R435

270

10K

R440

4.7K

R432

C410

12

123

R417

100K

R422

100K

R421

100K

R420

100K

R418

100K

R419

100K

38

39

40

IC404

IC441

R401

R402

R403

100K

R408

100K

R409

100K

R407

100K

R406

100K

R405

R404

100K

+

C403

47u10

C402

0.1

C401

R443

10K

C404

1000P

R444 10K

C443

+

2200u10

R445

10K

R441

1K

C442

4.7u25

+

R442

4.7K

10

9

8

6

7

5

3

1

2

4

X401

4.19MHz

C407

0.047

C406

TSW2(TURND)

TSW1(POWER)

26

27

TSW4(PHASE)

TSW3(SUBSD)

TSW5(B.BST)

30

29

28

TIO

TEST

SCK

INT

SO

16

17

14

15

13

V

O

G

12

3

4

-

+

R872

0.18

C208

R206

6.8K

R208

270K

R209

C207

270K

R207

C204

100

R205

C203

0.18

47K

R204

VOL.UP

VOL.DOWN

MUTE

POWER

22

24

23

NC

VDD

REMOTE

CE

21

19

20

ILL

31

T.04

T.05

33

32

25

T.02

SUBSO

T.01

35

36

37

34

T.03

REV

41

VOL

S.BST

39

40

38

42

VSS

NOR

SI

S.BOOST

POWER

SUBSONIC

ILL

SP

REV

18

12

10

11

8

9

6

7

X1

RESET

4

5

2

3

1

X2

+

C101

33u16

R111

22K

47K

R203

220K

R201

R202

47K

9

8

7

5

6

4

3

2

1

2

3

C107

47u16

+

R112 5.6K

C106 22P

R109

220P

+

-

R114

12K

-

+

C104 220P

R110 5.6K

0.01

C105

R115

1K

R101

4.7K

R103

1.2K

R104

1.2K

100K

R106

100K

R108

R105

100K

R107

R102

4.7K

1

2

3

4

5

6

7

8

39

38

1K

R428

R436

10K

R439 4.7K

+

100P

C108

C103

100P

14

13

11

10

8

9

12

1

2

3

5

6

7

4

-15V

-5V

~

, B

A

VOLTAGE

D814

CN601

A

CONT.

CROSSOVER

SLOPE

: 2SC2878A

Q622

: PST600C.

IC441

MTZ16B

:

ZD871,872

MTZJ6.8B

:

ZD401

MTZJ5.1B

:

D815,ZD873,874

: MTZJ30B

ZD101,102

:

D801

1SR139-100

:

D413,651-653,811-814,851

1SS133

:

D411,412,414-419,631,852,853

B30-1822-08

:

D404

B30-1821-08

:

D403

B30-1820-08

:

D401,402

D412

SW201

JK102

Q251

Q252

Q253

Q254

B

CONT.

CN201A

W601

STAND-BY

SW401

W401

SP OUTPUT

D801

D413

STAND-BY

GREEN

D404

REV

NOR

PEAK

Q401

(BOTTOM VIEW)

SPK JACK

: NJM4558L

IC101,201-203

: TC4066BP

IC204

: uPD75004CU-076

IC401

: LB1641

IC402

: 78L05A

IC403

: W02-3003-08

IC404

: uPC1298V

IC601

: uPC1237HA

IC651

: NJM2072D

IC851

Q251,252,401-403,405,441,631,651,851

: 2SC1815GR

: 2SA1015GR

Q253,254,621,652

: 2SC1846

Q601

:

Q602

:

Q603

: 2SB1274

Q871

: 2SD1913

Q872

LED ON/OFF

BUFFER

(1/2)

IC203

(2/2)

IC202

CROSSOVER FREQUENCY(REAR)

ZD874

ZD873

W802

ZD872

ZD871

RY851

PROTECT IC

WOOFER

SPK1

MUTE

CN804

DRIVE

MUTE

FINAL TR.

DETECT

DC

PRE

DRIVE

IC

IDLE

ADJ.

DRIVE

RELAY

LIMIT

Q651

D652

Q603

Q602

D653

RY601

ON/OFF

SP

-15V AVR

Q871

15V AVR

Q872

MODE SW

(2/2)

IC201

(1/2)

IC202

AMP

IC204 MODE

D651

Q652

ON/OFF

POWER

RELAY

ON/OFF

Q622

D631

Q601

Q851

D853

Q631

CN803A

D852

D851

CN801

CN802

D811

D812

D813

SP

W801

CN803B

CN401A

CN201B

W402

CN402A

VOLUME

MOTOR

M

LAMP

CONT.

ON/OFF

LAMP

D416

D417

MOVIE

MUSIC

Q402

D402

D401

D403

D815

Q621

D411

Q403

ZD401

VOLUME

MOTOR

DRIVE

REMOTE SENSOR

RESET

5V AVR

u-COM

RESET IC

Q441

D415

D414

CN201C

ZD101

ZD102

(2/2)

IC101

(1/2)

IC201

IC101

(1/2)

INPUT

LINE

Rch

Lch

TO SP

Q405

D419

D418

JK101

Lch

SP

INPUT

Rch

Lch

Rch

(FROM AMP)

X

,

IN

GND

OUT

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

(

)

X

210-6415-120

TRANSFORMER

S1

S3

S2

S4

S5

TH

F901

120V

240V

1

2

SW902A

X

F904

T1,6AL

250V

USED

(M,I,Y) TYPE

1

2

C903

0.047

C902

0.047

1

2

4700P

C901

AC SW

CN901

SW901

: AC230V~ 50Hz

: AC240V~ 50Hz

: AC220V~ 50Hz

50/60Hz

: AC110-120V

/220-240V~

: AC120V 60Hz

(T,E,G)

(X)

(C)

(Y,M,I)

(K,P)

CAUTION: For continued safety, replace safety critical components only with manufacturer's

recommended parts (refer to parts list).

indicates safety critical components. For continued

protection against risk of fire, replace only with same type and rating fuse(s). To reduce the risk

of electric shock, leakage-current or resistance measurements shall be carried out (exposed

parts are acceptably insulated from the supply circuit) before the appliance is returned to the

customer.

The DC voltage is an actual reading measured with

a high impedance type voltmeter. The measurement

value may vary depending on the measuring

instruments used or on the product.

2SA1015GR

2SC2878A

2SB1274

2SD1913

TC4066BP

NJM4558L

2SC1846

UPD75004CU-076

UPC1237HA

78L05A

LB1641

UPC1298V

PST600C

Note: 103SW(SW-301)/1050SW(SW-501)

103SW(K) PCB/SD 98.4.24 20:41 y[W 2

1050/103SW

770

620

660

600

643

103SW/SW-301

633

621

641

632

MVR401

642

603

640

611

SPK1

630x2

612

601

604

601

602

613

607

Gx2

Dx2

Mx2

Ex2

771

630x2

771

782x2

M

MVR401

Dx2

Cx8

759

780

777

Jx6

771

773

781

Ax3

L

Ax3

Hx2

Lx2

Nx2

Jx2

F

K

775

774

772

776

778

779

7P

(CN201A)

3P

(CN804)

Bx2

650

A

B

C

D

E

F

G

H

J

K

L

M

N

ø 4x14(BLK)

M4x16

ø 5x25(BLK)

ø 3x20(BLK)

ø 3x16(BLK)

ø 3x8

ø 3x6

ø 3x8

ø 3x10(BLK)

ø 3x8(BLK)

ø 3x10(BLK)

ø 3x8

:

N44-4014-45

N35-4016-45

N09-3668-05(103SW)

N09-3672-05(1050SW)

N44-3020-45(103SW)

N62-3116-45(1050SW)

N09-3669-05

N89-3006-46

N83-3008-46

N89-3010-45

N89-3008-45

N34-3010-45

N82-3010-45

N82-3008-46

N89-3008-46

625

622

1

2

A

C

B

Parts

with

exploded

numbers

larger

than

700

are

not

supplied.

103SW/SW

-301/1050SW/SW

-501

EXPLODED

VIEW

(UNIT)

7

103SW/SW301(K)

COVER(

98.4.24

20:44

y[W

6

KENWOOD SW-501 Service Manual

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