Sony SAWMS-25 Service manual

SA-WMS25

SERVICE MANUAL

Ver 1.0 2002. 09

• SA-WMS25 is the subwoofer section in
HT-K25.

SPECIFICATION

POWER OUTPUT
Rated Power Output at Stereo mode

(6 ohms 1 kHz, THD 0.7 %)

Reference Power Output

(THD 0.7 %) Front*: 40 W/ch

*Depending on the sound field settings and the

source, there may be no sound output.

40 W + 40 W

Center*: 40 W
Surround*: 40 W/ch
(6 ohms)
Subwoofer: 70 W
(3 ohms)

AEP Model

UK Model

E Model

General

Power requirements

Area code Power requirements

CEL, CEK, SP 220–230 V AC, 50/60 Hz
MX 120 V AC, 60 Hz

Power consumption 68 W
Power consumption (during standby mode)

0.8 W

9-874-149-01

2002I1600-1
© 2002.09

Frequency response

Enclosure type Advanced S.A.W.

Speaker unit 16 cm cone type
Rated frequency range

High frequency cut-off frequency

20 Hz – 20 kHz

magnetically shielded

30 Hz – 200 Hz

150 Hz

Sony Corporation

Home Audio Company
Published by Sony Engineering Corporation

Dimensions (w/h/d)
Mass (Approx.) 7.1 kg

Design and specifications are subject to change
without notice.

NOTE:

· is the specifications when connecting TA-VE25.

· Abbreviation

CEK : UK model
CEL : AEP model
MX : Mexican model

224 × 318.5 × 344 mm
including front panel

SUBWOOFER

SA-WMS25

TABLE OF CONTENTS

1. DISASSEMBLY

1-1. DSP Board ····································································· 3
1-2. PS Board········································································4
1-3. DIGIT AL AMP Board ··················································· 4

Unleaded solder

Boards requiring use of unleaded solder are printed with the lead­free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size.)

2. DIAGRAMS·································································5

2-1. Block Diagrams — Power Section — ·························· 6

— DSP/AMP Section — ··················· 7

2-2. Printed Wiring Boards

— DIGITAL AMP Section (Side A) — ························ 8

2-3. Printed Wiring Boards

— DIGITAL AMP Section (Side B) — ························ 9

2-4. Schematic Diagram

— DIGITAL AMP Section (1/2) — ···························· 10

2-5. Schematic Diagram

— DIGITAL AMP Section (2/2) — ···························· 11
2-6. Printed Wiring Board — PS Board (Side A) —········· 12
2-7. Printed Wiring Board — PS Board (Side B) — ········· 13
2-8. Schematic Diagram — PS Board — ·························· 14
2-9. Printed Wiring Board — DSP Board — ···················· 15
2-10. Schematic Diagram — DSP Board (1/2) — ·············· 16
2-11. Schematic Diagram — DSP Board (2/2) — ·············· 17
2-12. IC Block Diagrams ····················································· 18
2-13. IC Pin Function Description ······································· 20

3. EXPLODED VIEWS

3-1. Cabinet Section ··························································· 24
3-2. AMP Section ······························································· 25

4. ELECTRICAL PARTS LIST ······································· 26

: LEAD FREE MARK

Unleaded solder has the following characteristics.

• Unleaded solder melts at a temperature about 40°C higher than

ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350°C.
Caution: The printed pattern (copper foil) may peel away if the
heated tip is applied for too long, so be careful!

• Strong viscosity
Unleaded solder is more viscous (sticky, less prone to flow) than
ordinary solder so use caution not to let solder bridges occur such
as on IC pins, etc.

• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH
MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.

2

Notes on chip component replacement

•Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be

damaged by heat.

SECTION 1

DSP BOARD DIGITAL AMP BOARDPS BOARD

SET

DISASSEMBLY

• The equipment can be removed using the following procedure.

Note: Follow the disassembly procedure in the numerical order given.

1-1. DSP Board

SA-WMS25

8

flexible flat cable

(21core)

q;

DSP board

9

connector

(CNP601)

2

(+BTP 4 × 20)

7

two screws

(+BVTP 3 × 8)

6

shield plate

four screws

5

three screws

(+BVTP 3 × 8)

1

four screws

(+BTP 4

3

back panel

4

four screws

(+BVTP 3 × 8)

×

20)

3

SA-WMS25

)

1-2. PS Board

3

PS board

1

four screws

(+BVTP 3

×

8

1-3. DIGITAL AMP Board

2

connector

(CNP301)

7

DIGITAL AMP board

6

(+BVTP 3

three screws

×

8)

3

back panel

4

2

four screws

(+BVTP 3 × 8)

1

four screws

(+BVTP 3

×

8)

5

connector

(CNP302)

connector

(CNP401)

4

SECTION 2

DIAGRAMS

THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each bloc k.)

SA-WMS25

Note on Printed Wiring Boards:

• X : parts extracted from the component side.

• Y : parts extracted from the conductor side.

• b : Pattern from the side which enables seeing.

Caution:
Pattern face side: Parts on the pattern face side seen from
(Side B) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Side A) the parts face are indicated.

Note on Schematic Diagram:

• All capacitors are in µF unless otherwise noted. p: pF. 50
WV or less are not indicated except for electrolytics and
tantalums.

• 2 : nonflammable resistor

• All resistors are in Ω and 1/
specified.

• C : panel designation

f

•

Note: The components identified by mark 0 or dotted line

• A : B+ Line

• B : B– Line

•Voltages are dc with respect to ground under no-signal

•Voltages are taken with a V OM (Input impedance 10MΩ).

• Signal path.

•Abbreviation

: internal component

with mark 0 are critical for safety.
Replace only with part number specified.

conditions.
no mark : Power on

Voltage variations may be noted due to normal preduction
tolerances.

F : ANALOG INPUT
c : DIGITAL INPUT

MX : Mexican model

4

W or less unless otherwise

•Waveforms

1

IC300 4

2V/DIV, 10ns/DIV

3

IC605 qs (MCLK2)

1V/DIV, 40ns/DIV

2

IC501 id (X1)

6.5Vp-p20.3ns

1V/DIV, 100ns/DIV

4

IC606 wa (XOUT)

4.1Vp-p73.5ns

1V/DIV, 40ns/DIV

81.5ns 4.8Vp-p

3.9Vp-p200ns

5

SA-WMS25

2-1. Block Diagrams — Power Section —

D303

POWER

+28V

+12V

+5V

+6.2V

+3.3V

+5.6V

+3.3V

FOR

FLASH

PROGRAMMING

SYSTEM CONTROL

D302

3

3

IC501 (2/2)

IC908

+3.3V

REG

IC906

+3.3V

REG

PWCNT2

D/AOUT

PWCNT1

D301

IC903

+12V

2

1

REG

5

IC907

+6.2V

2

1

REG

Q906, 908

1

D916

1

PWCONT2

75

VCONT

63

PWCONT1

76

SWITCH

IC904

VCC

IC904

3

2

Q913, 915

1

BUFFER

5

IC905

+5.6V

3

REG

Q902, D905

REG

1

D911

RECT

IC902

ERROR

1

AMP

Q901, 903

SWITCH

T901

D919

D920

LF901,902

LINE

FILTER

F901

IC901

SWITCHING REG

D

3

VCC

4

OCP/SYNC

1

GND

2

FB/OLP

5

AC
IN

D903

Q905

D906

REG

PC901

2

TO

TA-VE25

CONTROL

CNP602 (2/2)

STOP

STOP

IC910

STOP

52

7

RESET

8

6

+5.6V

PC902

6

— DSP/AMP Section —

CNP602 (1/2)

LCH+

LCH-

RCH+

RCH-

D.SIG

TO

CONTROL

TA-VE25

BUSY(MAIN)

COM(SUB)

COM(MAIN)

Q503

Q504

CNP501
FLASH

PROGRAMMING

RESET

FLASH1

FLASH2

MD0

30

28 COMOUT

27

COMIN

49

MD0

BUSYOUT

55

Q501

D605Q502

BUSYIN

SA-WMS25

IC601 (1/2)

2

IC601 (2/2)

5

7

6

IC604

AUDIO

D601

7PD100

DATAO

IC501 (1/2)

A/D CONV

LIN

1

5

16

6

RIN

SYSCLK

RSTB

15DOUT

14BCK

13LRCK

X601

13.5MHz

88

92PM89

20

19

BST

HCS

HDIN

HCLK

69

59 EXLOCK

12

33

34

36

113

56

XRST

IC605

AUDIO DSP

SDI118

BCKI117

LRCKI115

SDI230

BCKI229

LRCKI228

KFSIO22

GP8

MCLK1

9

MCLK2

HDIN

HCLK

HCS

PM

BST

XRST

2

SDO3

SDO2

SCKOUT

BCKO

LRCKO

GP10

D0-15

A0-15

HACN

HDOUT

23SDO1

25

24

14

20

19

67

108

107

105

102

99

112

110

109

97

92

GP9

IC603

98

.

.

SRAM

80

.

77

.

75

.

72

82

.

.

85

.

83

.

.

66

64

45WE0

44CS0

68

32

35

87901891

GP9

HACN

HDOUT

SDATA

59

60SSHIFT

56AMPCE1

57AMPCE2

58AMPCE3

64RST

61NSPMUTE

62PGMUTE

66EN

54DIAG

DT FL/FR

DT C/SW

DT SL/SR

SCK

BCKO

LRCKO

SCDT

SHIFT

LAT1

LAT2

LAT3

RST(INIT)

NSMUTE

PGMUTE

EN

DIAG

IC300

24

X301

49.152MHz

IC305

STREAM PROCESSOR

DATA

43

XFS1IN

64

BCK

44

LRCK

45

SCDT

38

SCSHIFT

37

SCLATCH

36

INIT

41

NSPMUTE

39

PGMUTE

40

XFS0IN

28

FS0I

74

IC308

STREAM PROCESSOR

DATA

43

XFS1IN

64

BCK

44

LRCK

45

SCDT

38

SCSHIFT

37

SCLATCH

36

INIT

41

NSPMUTE

39

PGMUTE

40

XFS0IN

28

FS0I

74

IC318

STREAM PROCESSOR

DATA

43

XFS1IN

64

BCK

44

LRCK

45

SCDT

38

SCSHIFT

37

SCLATCH

36

INIT

41

NSPMUTE

39

PGMUTE

40

XFS0IN

28

FS0I

74

OUTL1+

OUTL2+

OUTR1+

OUTR2+

FS0CKO

OUTR1+

XFS0OUT

OUTL1+

OUTL2+

OUTR1+

OUTR2+

IC301

POWER DRIVER (FL)

6

24

15

10

1

77XFS0OUT

73

24OUTL1+

15OUTL2+

10

1OUTR2+

77

24

15

10

1

INA

16

INB

7

ENA

17

ENB

8

DIAGA

18

DIAGB

IC304

POWER DRIVER (FR)

6

INA

16

INB

7

ENA

17

ENB

8

DIAGA

18

DIAGB

IC306

POWER DRIVER (C)

6

INA

16

INB

7

ENA

17

ENB

8

DIAGA

18

DIAGB

IC307

POWER DRIVER (W)

6

INA

16

INB

7

ENA

17

ENB

8

DIAGA

18

DIAGB

IC309

POWER DRIVER (RL)

6

INA

16

INB

7

ENA

17

ENB

8

DIAGA

18

DIAGB

IC311

POWER DRIVER (RR)

6

INA

16

INB

7

ENA

17

ENB

8

DIAGA

18

DIAGB

OUTA

OUTB

OUTA

OUTB

OUTA

OUTB

OUTA

OUTB

OUTA

OUTB

OUTA

OUTB

L401,C401

LPF

9

L401,C402

LPF

19

Q401,

DC DETECT

Q411

L402,C403

LPF

9

L401,C404

LPF

19

Q402,

DC DETECT

Q412

L403,C405

LPF

9

L403,C406

LPF

19

Q403,

DC DETECT

Q413

L404,C407

LPF

9

L404,C408

LPF

19

Q404,

DC DETECT

Q414

L405,C409

LPF

9

L405,C410

LPF

19

Q405,

DC DETECT

Q415

L406,C412

LPF

9

L406,C413

LPF

19

Q406,

DC DETECT

Q416

Q328

SWITCH

J401 (1/3)

FRONT

L

REAR

J401 (2/3)

CENTER

SPEAKER OUT

(WOOFER)

J401 (3/3)

FRONT

R

REAR

IC606

DIGITAL AUDIO

2

CLKSEL1

1

XMODE

I/F RECEIVER

DIN2

5

DO

35

DI

36

CLK

38

CE

37

XIN

22

XOUT

21

CLKSEL1

47

XMODE

48

XMCK

AUDIO 24

ERROR 34

XSTATE

20

16DATAO

14BCK

15LRCK

13CKOUT

17

98

99

ERROR

XSTATE

SYSTEM CONTROL

IC602

117

335

DO

DI

CLK

CE

X602

12.288MHz

DI

CE

DO

CLK

77

5DI6DO3

4

CE

CLK

RSTX

MD2

51

MD2

X183X0

82

X501

5MHz

IC607

+2.6V

+2.6V 5V

3 1

REG

• Signal Path

: ANALOG INPUT

: DIGITAL INPUT

77

SA-WMS25

2-2. Printed Wiring Board — DIGITAL AMP Section (Side A) —

IC300

IC305

IC308

• : Uses unleaded solder.

• Semiconductor

Location

Ref. No. Location

D331 A-2
D332 B-2
D333 B-2
D334 C-2
D335 D-2
D336 D-2
D341 A-4
D342 B-4
D343 C-4
D344 C-4
D345 D-4
D346 E-4
D361 A-3
D362 B-3
D363 C-3
D364 D-3
D365 D-3
D366 E-3

IC300 A-1
IC305 B-1
IC308 C-1
IC318 D-1

(Page 15)

Q328 C-5

IC318

88

SA-WMS25

2-3. Printed Wiring Boards — DIGITAL AMP Section (Side B) —

• : Uses unleaded solder.

IC301

IC304

IC306

• Semiconductor

Location

Ref. No. Location

D301 E-1
D302 E-1
D311 A-3
D312 B-3
D313 B-3
D314 C-3
D315 D-3
D316 D-3
D321 A-3
D322 B-3
D323 C-3
D324 C-3
D325 D-3
D326 E-3
D351 A-5
D352 B-5
D353 C-5
D354 C-5
D355 D-5
D356 E-5
D401 A-1
D402 B-1
D403 B-1
D404 C-1
D405 A-1
D406 C-1

IC307

IC309

IC311

IC301 A-4
IC304 B-4
IC306 C-4
IC307 C-4
IC309 D-4
IC311 E-4

Q401 A-1
Q402 B-1
Q403 B-1
Q404 D-1
Q405 A-1
Q406 C-1
Q411 A-1
Q412 B-1
Q413 B-1
Q414 D-1
Q415 A-1
Q416 C-1

(Page 13) (Page 13)

99

SA-WMS25

2-4. Schematic Diagram — DIGITAL AMP Section (1/2) —

FB304

0UH

C327

0.01

CNS301

21P

R315

100

R316

100

R317

100

R318

100

R319

100

R334

1k

R336

1k

R338

1k

R339

100

R340

100

R341

100

R342

100

R344

100

R322

R347

100

10k

R346

1k

C344

0.01

• See page 18 for IC Block Diagrams.

C301

100

10V
C380
470p

C306

0.01

C326

47

16V

IC305

CXD9730Q

8

1

C385
470p

5

R325

3

.0

C

0

22

CNP303

CNP301

8P

CNP302

LI116

LI116

LI116

2P

3
T
A

1

6

3

3

3

B

D

M
S

D311

6
P

D321

3
T
A

1

6

4

3

3

B

D

M
S
6
P

3
T
A

2

6

3

3

3

B

D

M

D312

S
6
P

3

2

6

T

2

1

A

3

2

I1

D

4

L

36

3

B

D

M
S
6
P

C401

L401

C402

50V

C403

L402

C404

IC301

CXD9702L

IC304

CXD9702L

2
6
3
D

C333

0.1 B

C309
2200

35V

2
2

V

.0

2

1

0

6

-6

3

L

D

4

FP

0
3

S

C

C316

0.1

C310

100

C305

0.1

10V

V
2

2

3

-6

2

3

L

3

.0

C

0

FP
S

C341

0.1

C314

C315

0.1

100 10V

FB300

0UH

1
FT

D
4

8

0

3

C

0

0

U

p

0

0

0

1

0

G

3

1

IC

C
H
V
4
7
C
M

.01
0

2
0
3

C307

C

5p

9

1

5
3

.0

C

0

R370X301

68049.152MHz

C432

R302

10p

1M

2
0
3
L

C311

0.01

C312

100 10V

FB301

0UH

C372

0.01

C328

0.01

C331

0.01

C351

0.01

5
B

1

5

0

B

-T

3

2

2

D

S

0

4-T

E

3

0

1

D

S

1
Q
E
1
1

3

2

0

2

3

1

2V

.0

C

5

0

-6

3

L

D

R304

100

0
0
1

5
0
3
R

R307

100

P
F
S

C317 C318

100
35V

V
2

2
5

-6

3

L

D

FP
S

R320

100

C342

100
35V

C313

0.1 B

C319

0.1

100
10V

22
.0
0

4
3
3
C

C345

100
10V

C343

0.1

2P

D303

SEL5723C

R301

220

J401

1

50V

1

1

50V

1

50V

R401
220k

Q401

2SA1162

-YG-TE85L

R402
220k

Q402

2SA1162

-YG-TE85L

2SC2712-GL-TE85L

C414

0.1

C415

0.1

C417C416

0.10.1

C421

0.1

C420

0.1

1SS355TE-17

D401

C427

4.7 10V F

7

0

C428

4.7 10V F

7

0

3.2

Q328

0

Q411

2SA1162

-YG-TE85L

7

R411
220k

1SS355TE-17

D402

0

Q412

2SA1162

-YG-TE85L

7

R412
220k

R407

1k

0

C434

0.1
25V

F

R408

1k

1010

SA-WMS25

2-5. Schematic Diagram — DIGITAL AMP Section (2/2) —

C336

100
10V

FB305

0UH

C352

0.01

C373

0.01

C357

0.01

R345

1k

FB315

0UH

C392

C360

100
10V

0.01

• See page 18 for IC Block Diagrams.

C348

0.01

IC308

CXD9730Q

TP301

C386

C387

470p

0.01

C349

0.01

C390

0.01

0.01

C388

IC306

CXD9702L

D333

D353

C337
100
10V

FB302

0UH

C377

0.01

C378

0.01

C379

0.01

C355

0.01

C391

0.01

C389
100
10V

FB314

0UH

SFPL-62V

C356 C354

0.022 0.022

R321

100

100

C364

10V

100 35V

R330
100

D354

SFPL-62V

R333
100

C376 C375

0.022 0.022

R335

100

C381 C323

C383

100

100 35V

10V

D355

SFPL-62V

C397

0.022

R343

100

C365

0.1

C384

0.1

D363

SFPL-62V

C353

0.1 B

C363

0.1

C321C362

C320

100

0.1
10V

IC307

CXD9702L

D364

SFPL-62V

0.1 B

C374

C322

0.1

IC309

CXD9702L

D365

SFPL-62V

C396

0.022

C395

0.1
B

C382

0.1

100
10V

0.1

C324

P6SMB36AT3

D313

LI116

D343

D323

P6SMB36AT3

LI116

D334

D314

LI116

P6SMB36AT3

D344

D324

P6SMB36AT3

LI116

D335

D315

LI116

P6SMB36AT3

D345

D325

P6SMB36AT3

LI116

C405

1

50V

L403

C406

1

50V

C407

1

L404

50V

C408

1

50V

C409

1

L405

50V

C410

1

50V

R403
220k

R404
220k

R405
220k

Q405

2SA1162

-YG-TE85L
R406

220k

C418

C419

C422

C423

C425

C426

7

Q403

2SA1162

-YG-TE85L

7

Q404

2SA1162

-YG-TE85L

7

7

Q406

2SA1162

-YG-TE85L

0.1

0.1

0.1

0.1

0.1

0.1

C429

4.7 10V F

0

C430

4.7 10V F

0

C431

4.7 10V F

0

C433

4.7 10V F

0

1SS355TE-17

D403

0

Q413

2SA1162

-YG-TE85L

7

R413
220k

1SS355TE-17

D404

0

Q414

2SA1162

-YG-TE85L

7

R414
220k

1SS355TE-17

D405

0

Q415

2SA1162

-YG-TE85L

7

R415
220k

1SS355TE-17

D406

0

Q416

2SA1162

-YG-TE85L

7

R416
220k

CNP401

VHS2P

C329

C394

0.01

C393

0.01

R348

IC318

CXD9730Q

C361

0.01

C367

0.01

C366

0.01

100

R349

100

C398

0.01

R350
100

C399

0.01

100 35V

D356

SFPL-62V

100 35V

C325

C370

0.022

C340

C330

100

0.1

10V

0.1 B

C371

C346

C347

100

0.1

10V

IC311

CXD9702L

C369

0.022

C350

D366

100
10V

C335

100
10V

SFPL-62V

C338

0.1

D336

P6SMB36AT3

D316

LI116

C339

0.1

D326

D346

LI116

C368

0.1

P6SMB36AT3

C412

1

50V

L406

C413

1

50V

1111