sony subwoofer with stk404

1

SERVICE MANUAL US ModelCanadian Model

AEP ModelUK Model

E Model

SA-WM250

ACTIVE SUBWOOFER

Ver 1.0 2004.03

Sony CorporationHome Audio Company

Published by Sony Engineering Corporation

9-877-696-012004C04-1

© 2004.03

AUDIO POWER SPECIFICATIONSPOWER OUTPUT AND TOTAL HARMONICDISTORTION:With 6 ohm loads, from 28 – 200 Hz; rated 100 watts,minimum RMS power, with no more than 0.8 % totalharmonic distortion from 250 milliwatts to ratedoutput.

SystemType Active Subwoofer (magnetically shielded design)Speaker unit Woofer: 20 cm dia. (8 in.), cone typeRMS output 100 W (6 Ohms, 40 Hz, 10% THD)Frequency range 28 Hz – 200 HzHigh frequency cut-off frequency

50 Hz – 200 HzPhase selector NORMAL, REVERSE

SPECIFICATIONS

InputsInput jacks INPUT: input pin jack

SPEAKER IN: input terminalsOutput jacks SPEAKER OUT: output terminals

GeneralPower requirements Taiwan models: 110 V AC, 50 Hz

USA and Canada models: 120 V AC, 60 HzOther models: 230 V AC, 50/60 Hz

Power consumption 100 WDimensions Approx. 290 × 355 × 387 mm

(11 3/8 × 14 × 15 1/4 in.) (w/h/d)Mass 11.5 kg (25 lb 6 oz)Supplied accessories Foot pads (4)

Audio connecting cord (1 phono – 1 phono),2 m (6 ft 6 1/2 in.) (1)Speaker cords, 2.5 m (8 ft 2 1/2 in.) (2)

Design and specifications are subject to change without notice.

2

1.5 kΩ0.15 µFACvoltmeter(0.75 V)

To Exposed MetalParts on Set

Earth Ground

SAFETY CHECK-OUTAfter correcting the original service problem, perform the follow-ing safety check 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 TESTThe AC leakage from any exposed metal part to earth ground andfrom all exposed metal parts to any exposed metal part having areturn 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 theseinstruments.

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

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

SAFETY-RELATED COMPONENT WARNING!!

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

ATTENTION AU COMPOSANT AYANT RAPPORT À LA SÉCURITÉ!!

LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR LESDIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONTCRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NEREMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONYDONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OUDANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

TABLE OF CONTENTS

1. GENERALLocation of Controls ................................................................ 3

2. DIAGRAMS2-1. Note for Printed Wiring Boards and Schematic Diagrams ............................................................ 32-2. Circuit Boards Location ...................................................... 32-3. Printed Wiring Boards – Main Section – ............................ 42-4. Printed Wiring Board – Input Control Section – ................. 52-5. Printed Wiring Boards – Power Section – ........................... 62-6. Schematic Diagram – Main Section – ................................. 72-7. IC Block Diagram ............................................................... 8

3. EXPLODED VIEWS3-1. Main Section ....................................................................... 9

4. ELECTRICAL PARTS LIST ......................................... 10

SA-WM250

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

: 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 beapplied to the solder joint for a slightly longer time.Soldering irons using a temperature regulator should be set toabout 350°C.Caution: The printed pattern (copper foil) may peel away ifthe heated tip is applied for too long, so be careful!

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

• Usable with ordinary solderIt is best to use only unleaded solder but unleaded solder mayalso be added to ordinary solder.

(Fig. A)

3 3

SA-WM250

2-1. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

CONTROL board

POWER TRANS board

SWITCH board

INPUT CONTROL board

MAIN board

2-2. CIRCUIT BOARDS LOCATION

SECTION 2DIAGRAMS

SECTION 1GENERAL

LOCATION OF CONTROL

This section is extractedfrom instruction manual.

INPUT

SPEAKER ININ OUT

INPUT

L

SPEAKER

L

R R

Amplifier

This subwoofer

IN OUT

L

SPEAKER

L

R R

SPEAKERThis subwoofer

IN OUT

L

SPEAKER

L

R R

Front Speaker (R) Front Speaker (L)

SPEAKER A

IN OUT

L

SPEAKER

L

R R

SPEAKER B

A1

B2 1

C2

LEVEL

PHASE

E

POWER

1F

AmplifierThis subwoofer

MONO OUTINPUT

D

CUT OFF FREQ

Front Speaker (R) Front Speaker (L)

Amplifier

This subwoofer

Amplifier

CUT OFF FREQ200Hz

NORMALREVERSE

50Hz

PHASE

MAX

MIN

LEVEL

IN OUT

L L

R R

43

2 1

50Hz

200Hz

75Hz

120Hz 150Hz

100Hz

2G

Foot pads

POWER indicator

Precautions

On safety• Before operating the subwoofer, be sure that the

operating voltage of your subwoofer is identical withthat of your local power supply.

• Unplug the subwoofer from the wall outlet if it is not tobe used for an extended period of time. To disconnectthe cord, pull the cord by grasping the plug. Neverpull the cord itself.

• Should any liquid or solid object fall into thesubwoofer, unplug the subwoofer and have thesubwoofer checked by qualified personnel beforeoperating it any further.

• AC power cord must be changed only at the qualifiedservice shop.

When turning on or off an amplifier or otherequipmentLower the volume of the amplifier to minimum.

To avoid damaging the subwoofer• Be careful in setting the volume control of the amplifier

to avoid an excessive input power.• Do not attempt to open the enclosure or remold

speaker units and networks.

In case color irregularity is observed on thenearby TV screenWith the magnetically shielded type of the speakersystem, the speakers can be installed near a TV set.However, color irregularity may still be observed on theTV screen depending on the type of your TV set.

If color irregularity is observed...t Turn off the TV set once, then turn it on after 15 to

30 minutes.

If color irregularity is observed again...t Place the speakers further apart from the TV set.

When howling occursRelocate the speaker or turn down the volume of theamplifier.

On installation• Do not install the subwoofer near heat sources such as

radiators or air ducts, or in a place subject to directsunlight, excessive dust, mechanical vibration or shock.

• Good ventilation is essential to prevent internal heatbuild-up in the subwoofer. Place the subwoofer in alocation with adequate air circulation. Do not place thesubwoofer on a soft surface.

• Use caution when placing the speaker on a speciallytreated (waxed, oiled, polished, etc.) floor, as stainingor discoloration may result.

On cleaning the cabinetClean the cabinet with a soft cloth lightly moistened withwater. Do not use any type of abrasive pad, scouringpowder or solvent such as alcohol or benzine.

If you have any questions or problems concerning yoursubwoofer that is not covered in this manual, pleaseconsult your nearest Sony dealer.

Installation

Since the human ear cannot detect the direction andposition where the bass sound being reproduced by asubwoofer (below 200 Hz) comes from, you can installthe subwoofer wherever you like in your room. Toobtain a better bass reproduction, we recommend youto install the subwoofer on a solid floor where theresonance is unlikely to occur.

Notes• Always install the subwoofer vertically, keeping a few

centimeters away from the wall.• Do not place an object on the subwoofer or sit on it.• If the subwoofer is installed in the center of a room, the

bass could be extremely weakened. This is due to theinfluence of the standing wave of the room. If thishappens, move the subwoofer away from the center ofa room or eliminate the cause of the standing wave, byinstalling a bookshelf on the wall, etc.

Hooking Up the System

OverviewUse the INPUT jacks or the SPEAKER IN terminals of thesubwoofer when you connect the amplifier.• If your amplifier has one of the following types of

output jacks, connect the INPUT jack and theamplifier's jack using the supplied audio connectingcord.— MONO OUT jack— MIX OUT jack— SUBWOOFER output jack(s)— SUPER WOOFER output jack(s)

• If your amplifier does not have the above mentionedoutput jacks, connect the speaker terminals of theamplifier to the SPEAKER IN terminals instead. (A)

Before you get started• Turn off the power of the amplifier and the subwoofer

before making any connection.• Use the audio connecting cords that are supplied to

the respective equipment. If there are not enoughaudio connecting cords to make the necessaryconnections, you need to purchase some optionalaudio connecting cords.

• Be sure to make connections firmly to avoid noise.• Connect the AC power cord from the subwoofer to

a wall outlet.• You cannot connect the CENTER output jack for use

with Dolby Pro Logic function to the subwoofer.Bass sound is not output with some Dolby Pro Logicmodes.

Connecting to an amplifier with asingle set of speaker terminals (B)If your amplifier is equipped with a single set of speakerterminals, connect the subwoofer to the amplifier, andthen connect the front speakers to the subwoofer.

Hookups

1 Connect the subwoofer to the amplifier.

Connect the SPEAKER IN terminals of thesubwoofer to the amplifier’s speakerterminals with the speaker cords. Be sure toconnect both L and R channels.

2 Connect the front speakers to the subwoofer.

Connect the speakers to the SPEAKER OUTterminals of the subwoofer.

Connecting to an amplifier withdouble (A+B) sets of speakerterminals (C)If your amplifier has double (A+B) sets of speakerterminals, connect both the subwoofer and the frontspeakers to the amplifier.

Hookups

1 Connect the front speakers to the amplifier.

Connect the speakers to your amplifier’sSPEAKER A terminals.

2 Connect the subwoofer to the amplifier.

Connect the SPEAKER IN terminals of thesubwoofer to the amplifier’s SPEAKER Bterminals using the supplied speaker cords.

When using the double (A+B) sets of speakers, makesure that you select the “A+B” position with youramplifier.

NoteWhen you are using SPEAKER A terminal (frontspeaker) only or when the power of the amplifier isturned off, turn down the volume or turn off the powerof the subwoofer. Otherwise, hum noise may be heard.

Connecting to an amplifier with aspecial jack for a subwooferIf your amplifier has a special jack for a subwoofer (suchas MONO OUT jack, MIX OUT jack, SUBWOOFER jackor SUPER WOOFER jack), connect the INPUT jack of thesubwoofer to one of those jacks.

Hookups (D)Connect the MONO OUT jack of your amplifier to theINPUT jack of the subwoofer with the supplied audioconnecting cord.

NoteIf the output level of your amplifier is not large enough,the sound may not be loud enough. In this case, connectthe speaker terminals of the amplifier directly to theSPEAKER IN terminals of the subwoofer.

Connecting the AC power cord• Connect the AC power cord from the subwoofer and

from your amplifier to a wall outlet.• Make sure that power to the subwoofer is turned off

before you plug in or unplug any power cord.

Listening to the Sound (E)

1 Turn on the amplifier and select the programsource.

2 Press POWER.

The subwoofer turns on and the POWERindicator lights up in green.

3 Play the program source.

Adjust the VOLUME so that sound from thefront speakers is not distorted.If it is distorted, the sound from thesubwoofer will also be distorted.

Notes• Never set the amplifier’s tone control (BASS, TREBLE,

etc.) or the equalizer output to a high level or inputsinewaves of 20 Hz to 50 Hz recorded on acommercially-available test disc or special sound (basssound of electronic musical instrument, pop noise ofanalog disc turntable, sound with abnormallyenhanced bass, etc.) in a high level to this unit. Theseactions may cause damage to the speakers.When a special disc containing abnormally enhancedbass is played, noise may be output in addition to theoriginal sound. In such a case, reduce the sound level.

• The subwoofer output signal (DOLBY digital signal)of the digital surround processor sold singularly is set10 dB higher by Dolby laboratories LicensingCorporation. In the case of using normally, adjust thesubwoofer level.

Adjusting the Sound (F)

You can adjust the sound of the subwoofer to suit thesound of your front speakers. Reinforcing the bass soundgives you a greater sense of atmosphere.

1 Adjust the cut-off frequency.

Turn the CUT OFF FREQ control, dependingon the reproduction frequencies of your frontspeakers.

Refer to the following when adjusting.

1Typical very small sized speakers: 5 – 7 cmdia.

2Typical small sized speakers: 8 –15 cm dia.

3Typical medium sized speakers: 16 –24 cmdia.

4Typical large sized speakers: more than 25cm dia.

To make the most of the low level converterfunction of Dolby digital, turn the CUT OFFFREQ as high as possible when playing backthe Dolby digital.

2 Adjust the volume level of the subwoofer.

Turn the LEVEL control so that you can hearthe bass sound a little more than before. Toincrease the volume, turn the LEVEL controlclockwise. To reduce the volume, turn theLEVEL control counterclockwise.

3 Play your favorite song and movie.

Male vocal tunes and voice containing basssounds are most suitable for adjustment.Turn the volume for front speakers to thesame level as usual.

4 Select the phase polarity.

Use the PHASE selector to select the phasepolarity.

5 Repeat steps 1 to 4 to adjust for yourpreference.

Once you have adjusted the subwoofer to thesettings you want, use the VOLUME controlon the amplifier to adjust the volume of thesubwoofer with that of the other speakers.You don’t need to adjust the subwoofersettings when you change the volume levelof the amplifier.

Notes• If the sound distorts when you turn on the bass

reinforcement from your amplifier (such as, DBFB,GROOVE, the graphic equalizer, etc.), turn off the bassreinforcement and adjust the sound.

• Do not turn the volume of the subwoofer to maximum.Doing so may weaken the bass sound. Moreover,extraneous noise may be heard.

• Selecting NORMAL or REVERSE with the PHASEselector reverses the polarity and may provide betterbass reproduction in certain listening environments(depending on the type of front speakers, the positionof the subwoofer and the adjustment of the cut-offfrequency). It may also change the expanse andtightness of sound, and effect the feeling of the soundfield. Select the setting that provides the sound youprefer when listening in your normal listening position.

Setting the speaker (G)To prevent speaker vibration or movement whilelistening, attach the supplied foot pads to the speaker.

THIS NOTE IS COMMON FOR PRINTED WIRINGBOARDS AND SCHEMATIC DIAGRAMS.(In addition to this, the necessary note is printedin 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 electrolyticsand tantalums.

• All resistors are in Ω and 1/4 W or less unless otherwise

specified.• f : internal component.• C : panel designation.

For printed wiring boards.Note:• X : parts extracted from the component side.• Y : parts extracted from the conductor side.• : Pattern from the side which enables seeing.• Abbreviation

CND : Canadian model.MY : Malaysia model.SP : Singapore model.

• A : B+ Line.• B : B– Line.• Voltages are dc with respect to ground under no-signal

(detuned) conditions. no mark : Power on• Voltages are taken with a VOM (Input impedance 10 MΩ).

Voltage variations may be noted due to normal produc-tion tolerances.

• Signal path.F : AUDIO

• AbbreviationCND : Canadian model.MY : Malaysia model.SP : Singapore model.TW : Taiwan model.

Note:The components identi-fied by mark 0 or dottedline with mark 0 are criti-cal for safety.Replace only with partnumber specified.

Note:Les composants identifiés parune marque 0 sont critiquespour la sécurité.Ne les remplacer que par unepiéce portant le numérospécifié.

44

SA-WM250

2-3. PRINTED WIRING BOARDS — MAIN SECTION — • Refer to page 3 for Circuit Boards Location. : Uses unleaded solder.

1

A

B

C

D

E

F

2 3 4 5 6 7 8 9 10 11 12 13 14

CN402

CN301

IC301

RY301

C401

C402

C405

C407 C408

D40

2 D40

3

Q50

1

Q50

2

Q50

3

Q50

4

D50

1 C501

C502

C503R403

R404

C308

C306

C307

R307

C302

R301

R30

2

R401

R40

2

D30

4

R31

1

R31

2

C309

C310

R50

2

R50

3

JW10

2

JW11

6

C303

JW11

4JW

115

R308

D401

D301

JW10

6

R309

R303

C301

JW30

1

R508

Q50

5

R50

6 D50

2

R50

7

JW12

6

JW12

7

JW501C312

R50

5

R304

R50

1

G1

G2

R500

C409

C410

C313

JW128

R31

3

R31

5

D302

C406

R207

C203

C204

R208

R21

0

R20

5

R215

R21

6

C210

R217

C305C304

R504

C601

D60

2

R601

D205 D206

C205 C206

JW12

3

JW10

5

IC203IC202

JW10

7

CN201

JW10

8

JW132

JW10

9

R305

C311

CN202

JW11

0

R31

4JW

111

JW12

9

R30

6

JW10

1CNP111

C404

JW40

4JW403

JW103

JW104

C211

C209

JW11

7

JW11

8

R21

1

JW120

JW121

JW131

JW12

2

JW133

JW134

JW11

9

R31

0

C403

JW135

C316

C317

C318

C314

CN204

JW124

JW12

5

C411

C412

R317 JW130

JW11

2

CNP801

C801

RV801

(Page 6) (Page 5) (Page 5)(Page 6)

D205 D-8D206 D-8D301 F-4D302 F-4D304 C-6D401 C-3D402 C-4D403 C-4D501 B-5D502 F-4D602 B-8

IC202 D-9IC203 D-10IC301 F-7

Q501 B-6Q502 C-6Q503 B-7Q504 B-7Q505 F-4

• SemiconductorLocationRef. No. Location

5 5

SA-WM250

1

A

B

C

D

E

F

2 3 4 5 6 7 8 9 10 11 12 13 14

IC201

IC701 D20

4

C101

C201

S701

RV701

C701

C702

C703

C704

C705

C706

CN701

CN101

JW207

D20

3

JW20

8

J101

JW21

0

TM101

R10

3

R701

D20

2

D20

1

JW20

4

JW20

5

JW20

9

JW701

JW702

JW20

6

R20

2

R20

1

R203

R70

8

R70

7

R70

6

R704

R705

R702

R102 R104

R101R106R105 R

108

R109

R107

R703

R11

0

R204

2-4. PRINTED WIRING BOARD — INPUT CONTROL SECTION — • Refer to page 3 for Circuit Boards Location. : Uses unleaded solder.

(Page 4) (Page 4)

D201 C-12D202 C-12D203 C-11D204 C-12

IC201 C-10IC701 C-2

• SemiconductorLocationRef. No. Location

66

SA-WM250

2-5. PRINTED WIRING BOARDS — POWER SECTION — • Refer to page 3 for Circuit Boards Location. : Uses unleaded solder.

1

A

B

C

D

E

F

G

H

I

2 3 4 5 6 7 8 9 10 11 12 13 14

CN1CN2

FH951

C2

CNP401

FH901

F901

JW2

JW1

C901

S901

CN3

CN90

1

D901

(Page 4)

(Page 4)

7 7

SA-WM250

2-6. SCHEMATIC DIAGRAM — MAIN SECTION — • Refer to page 8 for IC Block Diagram.

IC B/D

TW

CN204

JW403

JW404

S901

C2C407

C408

JW501

F901

J101

RV701

CN901

C101

C211

C311

C312C313

C401

C402

C409

C410

C411

C412

D20

1

D20

2

D20

3

D20

4

D30

1

D30

2

D304

D602

Q502

Q503

R101

R102

R103

R104

R105

R106

R107

R108

R109

R110

R201 R202

R203

R204

R207

R208

R210

R211

R217

R301

R302

R303 R304

R305

R306

R307

R310

R311

R312

R313 R315

R317

R500R501

R502R503R504

R505

R506

R507

R508

R701R702

R703 R704

R705 R706 R707

R708

C209

C201

C701

C702

CN101 CN202

R205

C203 C204

C205

C206 C317

C316

C703

C704

C705

C706

C601 R601

C301

C314

C302

C303

C308

C307

C306C304 C305

C309

C310

R314

C503

C502

C405

C406

R402

R401

R403

R404

C403

C404

C318

CN2 CN3

R215

R216

C210

C801

TM101

RY301

IC201(2/2)

IC201(1/2)

IC202(1/2) IC202(2/2)

D20

5D

206

S701

IC701(1/2)

Q505

D502

IC301

R308

G1

G2

CN301

SP901

Q501

D501

C901

CN1

RV801

IC203(2/2)

IC203(1/2)

Q504

IC701(2/2)

D401

CN201 CN701

CNP111 CNP801

R309

D901

D402

D403

C501

CN402 CNP401

JW1T1

88

SA-WM250

IC301 STK404-130S (MAIN Board)

2-7. IC BLOCK DIAGRAM

1 2 3 4 5 6 7 8 9 10 11 12 13

9

SA-WM250SECTION 3

EXPLODED VIEWS

Ref. No. Part No. Description Remark

3-1. MAIN SECTION

Ref. No. Part No. Description Remark

The components identified bymark 0 or dotted line with mark0 are critical for safety.Replace only with part numberspecified.

Les composants identifiés par unemarque 0 sont critiques pourla sécurité.Ne les remplacer que par une piéceportant le numéro spécifié.

NOTE:• The mechanical parts with no reference

number in the exploded views are not supplied.• Items marked “*” are not stocked since

they are seldom required for routine service.Some delay should be anticipatedwhen ordering these items.

• -XX and -X mean standardized parts, sothey may have some difference from theoriginal one.

• Color Indication of Appearance PartsExample :

KNOB, BALANCE (WHITE) ... (RED)

Parts Color Cabinet’s Color• Accessories are given in the last of this

parts list.• Abbreviation

CND : Canadian modelMY : Malaysia modelSP : Singapore modelTW : Taiwan model

R R

1 A-4713-812-A SPEAKER CABINET ASSY (BLACK)...(BLACK)1 A-4715-636-A SPEAKER CABINET ASSY (WOOD)...(WOOD)2 4-229-774-01 SCREW, TAPPING, HEXAGON SOCKET3 4-253-174-01 GRILLE FRAME4 3-905-609-31 SCREW (TRANSISTOR)

* 5 3-703-244-00 BUSHING (2104), CORD06 1-769-744-11 CORD, POWER (AEP,UK,SP,MY)06 1-783-820-11 CORD, POWER (US,CND)06 1-827-597-41 CORD, POWER (TW)

7 4-999-482-81 KNOB (VOL)

8 4-235-677-01 SCREW (4X20) (TYPE1), +BVTP0F901 1-532-463-51 FUSE (T1AL/250V) (AEP,UK,SP,MY)0F901 1-533-450-12 FUSE, GLASS TUBE (DIA.5) (2.5A/125V)

(US,CND,TW)SP901 1-825-004-13 SPEAKER (20cm) (WOOFER)

0T901 1-439-624-11 TRANSFORMER, POWER (AEP,UK,SP,MY)

0T901 1-439-625-11 TRANSFORMER, POWER (US,CND,TW)#1 7-685-646-79 SCREW +BVTP 3X8 TYPE2 IT-3#2 7-685-880-09 SCREW +BVTT 4X6 (S)#3 7-685-647-79 SCREW +BVTP 3X10 TYPE2 IT-3

12

2

SP901

T901

F901

#2

#2

#2

#2

#3

#3

#1

#1

not supplied

not supplied

not supplied

not supplied

not supplied(CONTROL board)

not supplied(MAIN board)

not supplied(SWITCH board)

not supplied(POWER TRANS board)

not supplied(INPUT CONTROL board)

3

4

5

6

7

7

8

8

8

8

A

A

supplied withRV801

supplied withRV701

10

SA-WM250SECTION 4

ELECTRICAL PARTS LIST

NOTE:• Due to standardization, replacements in

the parts list may be different from theparts specified in the diagrams or thecomponents used on the set.

• -XX and -X mean standardized parts, sothey may have some difference from theoriginal one.

• RESISTORSAll resistors are in ohms.METAL:Metal-film resistor.METAL OXIDE: Metal oxide-film resistor.F:nonflammable

• Items marked “*” are not stocked sincethey are seldom required for routine service.Some delay should be anticipatedwhen ordering these items.

• SEMICONDUCTORSIn each case, u : µ, for example:uA.. : µA.. uPA.. : µPA..uPB.. : µPB.. uPC.. : µPC.. uPD.. : µPD..

• CAPACITORSuF : µF

• COILSuH : µH

• AbbreviationCND : Canadian model TW : Taiwan modelMY : Malaysia modelSP : Singapore model

Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark



When indicating parts by referencenumber, please include the board.

CONTROL BOARD***************

< CAPACITOR >

C801 1-126-964-11 ELECT 10uF 20% 50V

< CONNECTOR >

CNP801 1-691-765-11 PLUG (MICRO CONNECTOR) 3P

< VARIABLE RESISTOR >

RV801 1-227-511-11 RES, VAR, CARBON 20K (LEVEL)*************************************************************

INPUT CONTROL BOARD********************

< CAPACITOR >

C101 1-128-813-11 CERAMIC 220PF 5% 50VC201 1-126-964-11 ELECT 10uF 20% 50VC701 1-126-947-11 ELECT 47uF 20% 35VC702 1-126-947-11 ELECT 47uF 20% 35VC703 1-126-963-11 ELECT 4.7uF 20% 50V

C704 1-131-702-11 FILM 0.68uF 5% 50VC705 1-136-157-00 FILM 0.022uF 5% 50VC706 1-126-965-11 ELECT 22uF 20% 50V

< CONNECTOR >

CN101 1-779-179-11 CONNECTOR (B5B-XH-A) 5PCN701 1-784-931-11 PIN, CONNECTOR 5P

< DIODE >

D201 8-719-991-33 DIODE 1SS133T-77D202 8-719-991-33 DIODE 1SS133T-77D203 8-719-991-33 DIODE 1SS133T-77D204 8-719-991-33 DIODE 1SS133T-77

< IC >

IC201 8-759-636-74 IC M5218AP-22IC701 8-759-636-74 IC M5218AP-22

< JACK >

J101 1-815-025-11 JACK, PIN 1P (INPUT)

< RESISTOR >

R101 1-260-107-11 CARBON 4.7K 5% 1/2WR102 1-247-879-11 CARBON 100K 5% 1/4WR103 1-247-879-11 CARBON 100K 5% 1/4WR104 1-247-847-11 CARBON 4.7K 5% 1/4WR105 1-247-847-11 CARBON 4.7K 5% 1/4W

R106 1-247-847-11 CARBON 4.7K 5% 1/4WR107 1-260-107-11 CARBON 4.7K 5% 1/2WR108 1-247-879-11 CARBON 100K 5% 1/4WR109 1-247-879-11 CARBON 100K 5% 1/4WR110 1-247-879-11 CARBON 100K 5% 1/4W

R201 1-247-847-11 CARBON 4.7K 5% 1/4WR202 1-247-831-11 CARBON 1K 5% 1/4WR203 1-247-847-11 CARBON 4.7K 5% 1/4WR204 1-247-847-11 CARBON 4.7K 5% 1/4WR701 1-247-847-11 CARBON 4.7K 5% 1/4W

R702 1-249-429-11 CARBON 10K 5% 1/4WR703 1-249-428-11 CARBON 8.2K 5% 1/4WR704 1-249-428-11 CARBON 8.2K 5% 1/4WR705 1-247-879-11 CARBON 100K 5% 1/4WR706 1-247-847-11 CARBON 4.7K 5% 1/4W

R707 1-249-429-11 CARBON 10K 5% 1/4WR708 1-249-429-11 CARBON 10K 5% 1/4W

< VARIABLE RESISTOR >

RV701 1-227-365-11 RES, VAR, CARBON 20KX2 (CUT OFF FREQ)

< SWITCH >

S701 1-786-490-11 SWITCH, SLIDE (PHASE)

< TERMINAL BOARD >

TM101 1-537-922-11 TERMINAL BOARD (SPEAKER)*************************************************************

MAIN BOARD***********

< CAPACITOR >

C203 1-131-696-11 FILM 0.22uF 5% 50VC204 1-131-696-11 FILM 0.22uF 5% 50VC205 1-126-964-11 ELECT 10uF 20% 50VC206 1-126-964-11 ELECT 10uF 20% 50VC209 1-128-813-11 CERAMIC 220PF 5% 50V

CONTROL

INPUT CONTROL MAIN

11

SA-WM250


C210 1-126-964-11 ELECT 10uF 20% 50VC211 1-128-813-11 CERAMIC 220PF 5% 50VC301 1-128-813-11 CERAMIC 220PF 5% 50VC302 1-126-964-11 ELECT 10uF 20% 50VC303 1-104-658-11 ELECT 100uF 20% 10V

C304 1-126-968-11 ELECT 100uF 20% 50VC305 1-126-968-11 ELECT 100uF 20% 50VC306 1-126-964-11 ELECT 10uF 20% 50VC307 1-126-967-11 ELECT 47uF 20% 50VC308 1-126-964-11 ELECT 10uF 20% 50V

C309 1-136-165-00 FILM 0.1uF 5% 50VC310 1-136-165-00 FILM 0.1uF 5% 50VC311 1-162-199-31 CERAMIC 10PF 5% 50VC312 1-128-813-11 CERAMIC 220PF 5% 50VC313 1-128-813-11 CERAMIC 220PF 5% 50V

C314 1-128-813-11 CERAMIC 220PF 5% 50VC316 1-128-813-11 CERAMIC 220PF 5% 50VC317 1-128-813-11 CERAMIC 220PF 5% 50VC318 1-128-813-11 CERAMIC 220PF 5% 50VC401 1-136-165-00 FILM 0.1uF 5% 50V

C402 1-136-165-00 FILM 0.1uF 5% 50VC403 1-104-482-11 ELECT 4700uF 20% 63VC404 1-104-482-11 ELECT 4700uF 20% 63VC405 1-126-968-11 ELECT 100uF 20% 50VC406 1-126-968-11 ELECT 100uF 20% 50V

C407 1-126-971-11 ELECT 470uF 20% 50VC408 1-126-971-11 ELECT 470uF 20% 50VC409 1-136-165-00 FILM 0.1uF 5% 50VC410 1-136-165-00 FILM 0.1uF 5% 50VC411 1-128-813-11 CERAMIC 220PF 5% 50V

C412 1-128-813-11 CERAMIC 220PF 5% 50VC501 1-126-964-11 ELECT 10uF 20% 50VC502 1-126-949-11 ELECT 220uF 20% 35VC503 1-126-923-11 ELECT 220uF 20% 10VC601 1-126-964-11 ELECT 10uF 20% 50V

< CONNECTOR >

CN201 1-784-931-11 PIN, CONNECTOR 5PCN202 1-779-179-11 CONNECTOR (B5B-XH-A) 5P

* CN204 1-564-704-11 PIN, CONNECTOR (SMALL TYPE) 2PCN301 1-564-320-00 PIN, CONNECTOR (3.96mm PITCH) 2PCN402 1-785-104-11 PIN, CONNECTOR (3.96mm PITCH) 6P

CNP111 1-691-765-11 PLUG (MICRO CONNECTOR) 3P

< DIODE >

D205 8-719-110-31 DIODE RD12ESB2D206 8-719-110-31 DIODE RD12ESB2D301 8-719-991-33 DIODE 1SS133T-77D302 8-719-991-33 DIODE 1SS133T-77D304 8-719-991-33 DIODE 1SS133T-77

D401 8-719-302-38 DIODE RBV-602-01D402 6-500-522-11 DIODE 10EDB40-TA2B5D403 6-500-522-11 DIODE 10EDB40-TA2B5D501 8-719-991-33 DIODE 1SS133T-77D502 8-719-991-33 DIODE 1SS133T-77

D602 8-719-991-33 DIODE 1SS133T-77

< GROUND TERMINAL >

G1 1-537-738-21 TERMINAL, GROUNDG2 1-537-738-21 TERMINAL, GROUND

< IC >

IC202 8-759-636-74 IC M5218AP-22IC203 8-759-636-74 IC M5218AP-22IC301 6-600-091-01 IC STK404-130S

< TRANSISTOR >

Q501 8-729-119-78 TRANSISTOR 2SC2785-HFEQ502 8-729-178-42 TRANSISTOR 2SC2784-FQ503 8-729-119-78 TRANSISTOR 2SC2785-HFEQ504 8-729-029-86 TRANSISTOR DTC124ESAQ505 8-729-119-78 TRANSISTOR 2SC2785-HFE

< RESISTOR >

R207 1-249-429-11 CARBON 10K 5% 1/4WR208 1-249-426-11 CARBON 5.6K 5% 1/4WR210 1-247-871-11 CARBON 47K 5% 1/4WR211 1-247-863-11 CARBON 22K 5% 1/4WR215 1-249-429-11 CARBON 10K 5% 1/4W

R217 1-247-879-11 CARBON 100K 5% 1/4WR301 1-247-847-11 CARBON 4.7K 5% 1/4WR302 1-247-871-11 CARBON 47K 5% 1/4WR303 1-249-413-11 CARBON 470 5% 1/4W

0R304 1-215-886-11 METAL OXIDE 100 5% 2W F

R305 1-247-871-11 CARBON 47K 5% 1/4WR306 1-247-847-11 CARBON 4.7K 5% 1/4WR307 1-247-847-11 CARBON 4.7K 5% 1/4W

0R308 1-234-182-11 ENCAPSULATED COMPONENT 0.22X2 5WR309 1-249-409-11 CARBON 220 5% 1/4W

R310 1-249-393-11 CARBON 10 5% 1/4WR311 1-215-868-00 METAL OXIDE 680 5% 1WR312 1-247-863-11 CARBON 22K 5% 1/4WR313 1-249-429-11 CARBON 10K 5% 1/4W

0R314 1-217-637-00 FUSIBLE 1 5% 1/4W F

R315 1-247-871-11 CARBON 47K 5% 1/4WR317 1-249-393-11 CARBON 10 5% 1/4W

0R401 1-215-891-11 METAL OXIDE 680 5% 2W F0R402 1-215-891-11 METAL OXIDE 680 5% 2W F0R403 1-219-153-11 FUSIBLE 10 5% 1/4W F

0R404 1-219-153-11 FUSIBLE 10 5% 1/4W FR500 1-249-421-11 CARBON 2.2K 5% 1/4WR501 1-249-429-11 CARBON 10K 5% 1/4WR502 1-247-871-11 CARBON 47K 5% 1/4WR503 1-247-879-11 CARBON 100K 5% 1/4W

R504 1-247-879-11 CARBON 100K 5% 1/4WR505 1-247-863-11 CARBON 22K 5% 1/4WR506 1-247-863-11 CARBON 22K 5% 1/4WR507 1-247-847-11 CARBON 4.7K 5% 1/4WR508 1-247-831-11 CARBON 1K 5% 1/4W

0R601 1-215-920-11 METAL OXIDE 3.3K 5% 3W F

< RELAY >

RY301 1-515-920-11 RELAY (24V)*************************************************************

MAIN



12

SA-WM250


POWER TRANS BOARD*******************

1-533-217-41 HOLDER, FUSE

< CAPACITOR >

0C2 1-113-924-11 CERAMIC 0.0047uF 20% 250V

< CONNECTOR >

CN1 1-564-321-00 PIN, CONNECTOR (3.96mm PITCH) 2P* CN2 1-580-230-11 PIN, CONNECTOR (PC BOARD) 2P*************************************************************

SWITCH BOARD*************

< CAPACITOR >

0C901 1-113-924-11 CERAMIC 0.0047uF 20% 250V

< CONNECTOR >

* CN3 1-695-044-11 PIN, CONNECTOR (3.96mm PITCH) 2PCN901 1-564-718-11 PIN, CONNECTOR (SMALL TYPE) 2P

< DIODE >

0D901 6-500-991-01 LED TLPGE62T(SONY-M.F) (POWER)

< SWITCH >

0S901 1-554-920-11 SWITCH, PUSH (AC POWER) (1 KEY) (POWER)*************************************************************

MISCELLANEOUS***************

06 1-769-744-11 CORD, POWER (AEP,UK,SP,MY)06 1-783-820-11 CORD, POWER (US,CND)06 1-827-597-41 CORD, POWER (TW)0F901 1-532-463-51 FUSE (T1AL/250V) (AEP,UK,SP,MY)0F901 1-533-450-12 FUSE, GLASS TUBE (DIA.5) (2.5A/125V)

(US,CND,TW)

SP901 1-825-004-13 SPEAKER (20cm) (WOOFER)0T901 1-439-624-11 TRANSFORMER, POWER (AEP,UK,SP,MY)0T901 1-439-625-11 TRANSFORMER, POWER (US,CND,TW)*************************************************************

ACCESSORIES************

1-769-329-21 CORD, CONNECTION (PIN-PIN) (AUDIO)1-769-433-23 CORD, SPEAKER (2.5m)

0 1-770-019-11 ADAPTOR, CONVERSION PLUG 3P (UK)4-235-237-01 FOOT (BLACK/WOOD:AEP,UK,TW)4-252-451-11 MANUAL, INSTRUCTION (ENGLISH,FRENCH,

SPANISH) (US,CND)

4-252-451-21 MANUAL, INSTRUCTION (ENGLISH,FRENCH,GERMAN,ITALIAN)

(AEP,UK)4-252-451-31 MANUAL, INSTRUCTION (DUTCH,SPANISH,

SWEDISH,POLISH)(AEP)

4-252-451-41 MANUAL, INSTRUCTION (PORTUGUESE,DANISH,FINNISH) (AEP)

4-252-451-51 MANUAL, INSTRUCTION (ENGLISH,FRENCH,SPANISH,TRADITIONAL CHINESE)

(SP,MY,TW)4-981-864-01 FOOT (WOOD:SP,MY)

POWER TRANS SWITCH



13

SA-WM250

MEMO

14

SA-WM250

REVISION HISTORY

Clicking the version allows you to jump to the revised page.Also, clicking the version at the upper on the revised page allows you to jump to the next revised page.

Ver. Date Description of Revision1.0 2004.03 New

sony subwoofer with stk404

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