SA SA WX900 Service Manual

SA-WX900

SERVICE MANUAL

Ver 1.1 2004.05

SPECIFICATIONS

AUDIO POWER SPECIFICATIONS For the U.S.A. model

POWER OUTPUT AND TOTAL HARMONIC DISTORTION: With 4 ohm loads, from 20 – 200 Hz; rated 800 watts, minimum RMS power, with no more than 0.8 % total harmonic distortion from 250 milliwatts to rated output.

US Model

Canadian Model

AEP Model

UK Model

Inputs

Input jacks

LINE IN: input pin jack SPEAKER IN: input terminals

Output jacks

LINE OUT: output pin jack SPEAKER OUT: output terminals

System

Type

Active Subwoofer, magnetically shielded (closed cabinet)

Speaker units

Woofer : 30 cm dia. (12 in.), cone type x 2

Continuous RMS output

North American model (4 ohms/100Hz, 0.8%) : 1,000 W European model (DIN 4 ohms/100Hz, 0.8%) : 1,000 W

Reproduction frequency range

20 Hz – 200 Hz

High frequency cut-off frequency

50 Hz – 200 Hz

Phase selector

NORMAL, REVERSE

Mode selector

MOVIE, MUSIC BASS-BOOST OFF, 1, 2

General

Power requirements

North American model : 120 V AC, 60 Hz European model : 220 – 240 V AC, 50 Hz Other models : 220 – 240 V AC, 50 Hz

Power consumption

220 W less than 0.5 W (Standby mode)

Dimensions

Approx. 440 x 550 x 620 mm (17 3/8 x 21 7/8 x 24 1/2 in.) (w/h/d)

Mass

48 kg (105lb 14oz)

Supplied accessories

Audio connecting cord (1 phono plug – 1 phono plug) (1) Speaker cords (2) Spike Design and specifications are subject to change without notice.

9-961-097-02

2004E02-1

ACTIVE SUBWOOFER

Sony Corporation

Home Audio Company

Published by Sony Engineering Corporation

SA-WX900

SAFETY CHECK-OUT

After correcting the original service problem, perform the following safety checks before releasing the set to the customer: Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below.

LEAKAGE

The AC leakage from any exposed metal part to earth Ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microampers). Leakage current can be measured by any one of three methods.

1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers’ instructions to use these instruments.

2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job.

3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The “limit” indication is 0.75 V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2V AC range are suitable. (See Fig. A)

TABLE OF CONTENTS

Specifications ........................................................................... 1

1. GENERAL ...................................................................... 3

2. DIAGRAMS

2-1. Circuit Boards Location ............................................. 4

2-2. Schematic Diagram – Filter Section – ........................ 5

2-3. Printed Wiring Board – Filter Section – ..................... 6

2-4. Schematic Diagram – Power Section – ...................... 7

2-5. Printed Wiring Board – Power Section –.................... 8

3. EXPLODED VIEWS

3-1. Amp Section ............................................................... 9

3-2. Cabinet Section ......................................................... 10

4. ELECTRICAL PARTS LIST....................................11

To Exposed Metal Parts on Set

0.15µF

1.5kΩ

Earth Ground

AC voltmeter (0.75V)

Fig. A. Using an AC voltmeter to check AC leakage.

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.

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ!!

LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

• Location of controls

PHASE MODECUT OFF FREQUENCYLEVEL

POWER SAVE

NORM

OFF

REVERSE200Hz50HzMAXMIN AUTO

MUSIC

MOVIE

SECTION 1

GENERAL

BOOST

2 1 OFF

SA-WX900

This section is extracted from instruction manual.

ON/STANDBY

POWER

LEVEL

CUT OFF FREQUENCY

PHASE

POWER SAVE

MODE

BOOST

POWER indicator

POWER

SA-WX900

SECTION 2

DIAGRAMS

THIS NOTE IS COMMON FOR SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.)

For Schematic Diagrams. Note:

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

• All resistors are in Ω and 1/

• C : panel designation.

Note:

The components identified by mark 0 or dotted line with mark 0 are criti- cal for safety. Replace only with part number specified.

• A : B+ Line.

• B : B– Line.

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

• no mark : Power on

•Voltages are taken with a VOM (Input impedance 10 MΩ). Voltage variations may be noted due to normal production tolerances.

• Signal path. F : AUDIO

• Abbreviation CND : Canadian model

W or less unless otherwise specified.

Note:

Les composants identifiés par une marque 0 sont critiques pour la sécurité. Ne les remplacer que par une piéce portant le numéro spécifié.

For printed wiring boards.

Note:

• X : parts extracted from the component side.

•

• Abbreviation

: Pattern from the side which enables seeing.

CND : Canadian model

2-1. CIRCUIT BOARDS LOCATION

FILTER board

SWITCHING REGULATOR

CONTROL board

SWITCH board

INPUT board

PROTECT board

ICE250-SW

AUTO POWER boar

LINE FILTER board

POWER SW board

2-2. SCHEMATIC DIAGRAM –FILTER SECTION –

C103

R109

2.2k

C106 47p

IC101(2/2)

BA4558

C101 220p

D104

1SS133

D103

1SS133

220p

IC101(1/2)

BA4558

C110

C111

R110

2.2k

0.1

SPEAKER

LINE

D102

1SS133

D101

R106

R102

4.7k 1/2W

R104

C105

D106

1SS133

R105

22k

R107

22k

R108

22k

C102 220p

47k

D105

1SS133

50V

R114 100k

R111

R101

4.7k

1/2W

R103

47k

R112

L101

1SS133

C104 220p

TM101

OUT

J101

OUT

C108

C109

SA-WX900

Ver 1.1

RV402

R403

20kB

R404

IC204(1/2)

KIA4558P

C243

0.1

R226

5.6k

R256

C214

0.15

12k

47k

R402

2.2k

C215

0.68

IC205(2/2)

KIA4558P

R230

IC205(1/2)

KIA4558P

C216

0.022

R233

15k

R234

2.2k

C241

0.1

47k

C242

R229

C218

0.001

0.1

C230

C232

0.1

50V

C234

C231

0.1

50V

CN203

47k

2.2k

R401

C213

0.33

R302

22k

SW304

IC203(1/2)

KIA4558P

C206

0.47

KTC3199

C207

0.47

R216

R217

68k

D204

1SS133

R231

RV401

20kB

CN401

CN205

R211

R218

R219

10k

C205

C204

R209

10k

R214

3.3k

R213

4.7k

C208

0.001

Q201

R232

47k

IC204(2/2)

KIA4558P

IC207

BU4066

R225

4.7k

R215

C212

0.18

KTC3199

R224

10k

Q202

R301

22k

CN302

CN206

SW303

SW302

CN301

CN204

IC201(1/2)

R204

10k

IC206(1/2)

BA4558

BPF

KIA4558P

R253

4.7k

R205

IC201(2/2)

R250

15k

R251

KIA4558P

R201

10k

R202

10k

R203

6.8k

C201 100p

C222

0.01

R252

33k

C221

0.01

22k

CN201

CN101

10 50V

SW301

C203

50V

IC202(1/2)

KIA4558P

IC203(2/2)

R208

10k

R207

47k

R255

BUFFER

KIA4558P

R220

6.8k

C211

0.001 R210

R223

C209

C210

R221

680

47k

IC206(2/2)

BA4558

R222 100k

C202

50V

10k

R206

47k

R254

47k

C223

50V

R240

10k

C219

0.0015

IC202(2/2)

KIA4558P

R242

150

D201

1SS133

C220

50V

R244 100k

R245

R241

10k

D202

1SS133

R246

10k

D203

1SS133

Q203

R247

47k

KTA1267

R248

47k

10k

R249

D205

1SS133

22k

Q204

KTC3199

C240

C239

0.1

C236

C235

C237

C238

50V

0.1

50V

0.1

CN202

XH5P

+ 11 hidden pages

SA SA WX900 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

GENERAL

DIAGRAMS

2-1. CIRCUIT BOARDS LOCATION

2-2. SCHEMATIC DIAGRAM –FILTER SECTION –