Sony SAWMS-367 Service manual

SA-WMS367

SERVICE MANUAL

Ver 1.0 2004.03

• SA-WMS367 is the subwoofer
section in SA-VE367T.

SPECIFICATIONS

For the US model
AUDIO POWER SPECIFICATIONS

POWER OUTPUT AND TOTAL HARMONIC
DISTORTION:
with 6 ohm loads, from 20 - 200 Hz; rated 120 watts per
channel minimum RMS power, with no more than 10%
total harmonic distortion from 250 milliwatts to rated
output.

Speaker system Active subwoofer,

magnetically shielded
Speaker unit Woofer: 20 cm (8 in.)
Enclosure type Acoustically loaded

Bass Reflex
Reproduction frequency range

26 Hz - 200 Hz
Continuous RMS power output

135 W (6 ohms, 100 Hz,

10% THD)

US Model

Canadian Model

Inputs

INPUT (input pin jack)
SPEAKER IN (input terminals)

Outputs

SPEAKER OUT (output terminals)

General

Power requirements 120 V AC, 60 Hz
Power consumptions 130 W

1 W (standby mode)

Dimensions (w/h/d) Approx. 290 × 400 × 424 mm

(11 1/8 × 15 1/4 × 16 3/8 in.)

Mass Approx. 13 kg

(28 lb 11 oz)

Design and specifications are subject to change without
notice.

9-877-698-01

2004C04-1

© 2004.03

SUBWOOFER

Sony Corporation

Home Audio Company

Published by Sony Engineering Corporation

1

r

SA-WMS367

SAFETY CHECK-OUT

After correcting the original service problem, perform the follow­ing 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 TEST

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 low­voltage 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 2 V AC range are suit­able. (See Fig. A)

To Exposed Metal
Parts on Set

TABLE OF CONTENTS

1. GENERAL

Location of Controls ................................................................ 3

2. DIAGRAMS

2-1. Note for Printed Wiring Boards and

Schematic Diagrams ............................................................ 3

2-2. Circuit Boards Location ...................................................... 3

2-3. Printed Wiring Boards – Main Section – ............................ 4

2-4. Schematic Diagram – Main Section – ................................. 5

2-5. Printed Wiring Boards – Control Section – ......................... 6

2-6. Schematic Diagram – Control Section – ............................. 7

2-7. IC Block Diagram ............................................................... 8

3. EXPLODED VIEWS

3-1. Front Section ....................................................................... 9

3-2. Rear Section ...................................................................... 10

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

0.15 µF

1.5 k

Earth Ground

(Fig. A)

UNLEADED SOLDER

AC

Ω

voltmete
(0.75 V)

•

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.)

: 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
PA RT NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.

2

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 CONTROL

d

SECTION 1

GENERAL

This section is extracted
from instruction manual.

SA-WMS367

SECTION 2

DIAGRAMS

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

A

Ee Ee

3.5 m
(11.5 ft.)

Amplifier

SURROUND BACK

10 m
(32.8 ft.)

Ee Ee

Surround (Right) Surround (Left)

Surround back
(Right)

D

Front (Left)

Surround (Left)

100

~

Surround back
(Left)

30 30

120

AA

INPUT

WOOFER OUT

Center

A

CENTER

Ee
eEEe

Subwoofer

100

~

120

Surround (Right)

Surround back
(Right)

Center

Ee

3.5 m
(11.5 ft.)

RRL

eEEe

L

L

Surround back
(Left)

Front (Right)

FRONT

SURROUND

EeEe

Subwoofer

Front (Right)

H

About this manual

The SA-VE367T is a 7.1 channel speaker system
consisting of two front speakers, two surround speakers,
two surround back speakers, one center speaker, and one
subwoofer. It supports Sony Digital Cinema Sound,
Dolby* Pro Logic, and Dolby Digital etc., and is thus
geared towards the enjoyment of movies.

* “Dolby” and the double-D symbol are trademarks of

Dolby Laboratories.

Precautions

On safety

• Before operating the system, be sure that the operating
voltage of the system is identical with that of your local
power supply.

• The unit is not disconnected from the AC power source
(mains) as long as it is connected to the wall outlet,
even if the unit itself has been turned off.

• Unplug the system from the wall outlet if it is not to be
used for an extended period of time. To disconnect the
cord, pull the cord by grasping the plug. Never pull
the cord itself.

• Should any liquid or solid object fall into the system,
unplug the system’s power cord and have the system
checked by qualified personnel before operating it any
further.

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

On operation

• Do not drive the speaker system with a continuous
wattage exceeding the maximum input power of the
system.

•If the polarity of the speaker connections are not
correct, the bass tones will be weak and the position of
the various instruments obscure.

• Contact between bare speaker wires at the speaker
terminals may result in a short-circuit.

• Before connecting, turn off the amplifier to avoid
damaging the speaker system.

• The speaker grille cannot be removed. Do not attempt
to remove the grille on the speaker system. If you try
to remove it, you may damage the speaker.

•

The volume level should not be turned up to
the point of distortion.

If you encounter color irregularity on a
nearby TV screen

This speaker system is magnetically shielded to allow it
to be installed near a TV set. However, color
irregularities may still be observed on certain types of TV
sets.

If color irregularity is observed...

c Turn off the TV set, then turn it on again after 15 to

30 minutes.

If color irregularity is observed again...

c Place the speakers further away from the TV set.

If howling occurs

Reposition the speakers or turn down the volume on the
amplifier.

On placement

• Do not set the speakers in an inclined position.

• Do not place the speakers in locations that are:
— Extremely hot or cold
— Dusty or dirty
— Very humid
— Subject to vibrations
— Subject to direct sunlight

• Use caution when placing the speaker on a specially
treated (waxed, oiled, polished, etc.) floor, as staining
or discoloration may result.

On cleaning

Clean the speaker cabinets with a soft cloth lightly
moistened with a mild detergent solution or water. Do
not use any type of abrasive pad, scouring powder or
solvent such as alcohol or benzine.

If you have any questions or problems concerning your
speaker system, please consult your nearest Sony dealer.

Front (Left)

3.5 m
(11.5 ft.)

10 m
(32.8 ft.)

E

Foot pads

I

POWER

Hooking up the system

Connect the speaker system to the speaker output
terminals of an amplifier.
Make sure power to all components (included the
subwoofer) is turned off before starting the hook-up.

HookupA

Usually, connect by this method.
This configuration is used when the amplifier is
connected to a DVD player, LD player, VCR or other
video devices.

HookupB

Try this configuration instead of “Hookup A” when
there are no jacks on the amplifier for a subwoofer.
An optional specified speaker cord (2.5 m × 2)(8.2 ft. × 2)
is necessary when connecting this way.

Notes (C)

• Make sure the plus (+) and the minus (–) terminals on
the speakers are matched to the corresponding plus (+)
and minus (–) terminals on the amplifier.

• Be sure to tighten the screws of the speaker terminals
securely as loose screws may become a source of noise.

• Make sure all connections are firm. Contact between
bare speaker wires at the speaker terminals may cause
a short-circuit.

• For details regarding the connections on the amplifier
side, refer to the manual that was provided with your
amplifier.

Tip

Black or black striped wires are minus (–) in polarity, and
should be connected to the minus (–) speaker terminals.

Positioning the speakers

Location of each speaker (D)

Each speaker should face the listening position. Better
surround effect will result if all speakers are set at the
same distance from the listening position.
Place the front speakers at a suitable distance to the left
and right of the television.
Place the subwoofer on either side of the television.
Place the center speaker on the top-center of the TV set.
The placement of surround speakers greatly depends on
the configuration of the room. The surround speakers
may be placed slightly behind the listening position.
Place the surround back speakers behind the listening
position. The angle A should be the same.

Setting the speakers

To prevent speaker vibration or movement while
listening, attach the supplied foot pads to the bottom
four corners of the center speaker, front speakers,
surround speakers and surround back speakers (

Setting the center speaker (F)

Set the center speaker firmly on top of the TV set, making
sure it is completely level.

Setting other speakers (G)

For greater flexibility in the positioning of the speakers,
use the optional WS-FV11 or WS-WV10D speaker stand
(available only in certain countries).

Tip

The height of the front speakers should be adjusted to
about the center of the TV screen (

H

B

).

POWER
indicator

POWER

3.5 m
(11.5 ft.)

Ee
eEEe

RL

10m
(32.8 ft.)

Surround back
(Right)

RRL

Ee

Ee

2.5m (8.2 ft.)

2.5m (8.2 ft.)

FRONT

SPEAKERINSPEAKER

eEEe

L

SURROUND

Ee

Surround back
(Left)

Ee Ee

3.5 m
(11.5 ft.)

CENTER

Amplifier

SURROUND BACK

Ee

Surround (Right)

J

Setting the amplifier

When connecting to an amplifier with internal multi
channel decoders (Dolby Digital, DTS**, etc.), you should
use the setup menus for the amplifier to specify the
parameters of your speaker system.
See the table below for the proper settings. For details on
the setting procedure, refer to the manual that was
provided with your amplifier.

When “Hookup A” is used
(Speaker setup)

For Set to

Front speakers SMALL

Center speaker SMALL

Surround speakers SMALL

Subwoofer ON (or YES)

When “Hookup B” is used
(Speaker setup)

For Set to

Front speakers LARGE

Center speaker SMALL

Surround speakers SMALL

Subwoofer OFF (or NO)

If you use the amplifier with adjustable crossover
frequency, it is recommended to select 150 Hz (or close to
this figure) as the crossover frequency for your front,
center, and surround speakers.

** “DTS” and “DTS Digital Surround” are registered

trademarks of Digital Theater Systems, Inc.

Listening to the sound (I)

First, turn down the volume on the amplifier. The
volume should be set to minimum before you begin
playing the program source.

1

Turn on the amplifier and select the
program source.

2

Press POWER on the subwoofer.

The POWER indicator on the subwoofer
lights up green.

3

Play the program source.

Power turns on and off automatically

E

).

power on/off function

When the subwoofer is on (i.e, the POWER indicator
lights up green) and there is no signal input for a few
minutes, the POWER indicator changes to red and the
subwoofer enters power saving mode. While in this
mode a signal is input to the subwoofer, the subwoofer
automatically turns on (auto power on/off function).
To turn this feature off, slide the POWER SAVE switch
on the rear panel to OFF.

Note

If you turn down the volume level of the amplifier too
low, the auto power on/off function may activate,
causing the subwoofer to enter power saving mode.

RLR

(J)

e
E
E
e

Front (Left)CenterFront (Right)

L

OUT

10m
(32.8 ft.)

POWER SAVE

AUTO

OFF

3.5 m
(11.5 ft.)

Subwoofer

Ee

Surround (Left)

Foot pads

— Auto

C

e

e

e

E

E

E

e

E

GF

WS-WV10D
(for surround
speakers)

INPUT

MAX

VOLUME

MIN

MAX

BASS BOOST

MIN

PHASE

PHASE

K

WS-FV11

BASS BOOST

++

INPUT

VOLUME

NORMAL

REVERSE

POWER SAVE

AUTO

OFF

Adjusting the subwoofer (K)

1

Rotate VOLUME to adjust the volume.

Set the volume level to best suit your
preference according to the program
source.

2

Select the phase polarity.

Use the PHASE selector to select the phase
polarity.

3

Set BASS-BOOST to MIN.

Rotate BASS-BOOST according to the
output level that you prefer. Some
material is recorded with strong emphasis
on bass sounds, which may be accessive in
some cases. If this happens, rotate BASS­BOOST towards minimum.

Notes

• Some amplifier functions for enhancing the sound may
cause distortion in the subwoofer. If such distortion
occurs, turn off those functions.

• To enjoy high-quality sound, do not turn the
subwoofer volume too high.

•If the sound distorts when you turn on the bass
reinforcement from your amplifier (such as DBFB,
GROOVE, the graphic equalizer, etc.), turn down the
bass reinforcement and adjust the level.

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

• Selecting NORMAL or REVERSE with the PHASE
selector reverses the polarity and may provide better
bass reproduction in certain listening environments
(depending on the type of front speakers, the position
of the subwoofer and the adjustment of the BASS­BOOST. It may also change the expansion and
tightness of sound, and effect the feeling of the sound
field. Select the setting that provides the sound you
prefer when listening in your normal listening position.

Troubleshooting

Should you encounter a problem with your speaker
system, check the following list and take the indicated
measures. If the problem persists, consult your nearest
Sony dealer.

There is no sound from the speaker system.

•Make sure all the connections have been
correctly made.

•Make sure the volume on the amplifier has
been turned up properly.

•Make sure the program source selector on the
amplifier is set to the proper source.

• Check if headphones are connected. If they
are, disconnect them.

There is distortion in the subwoofer sound
output.

• Check if any sound-enhancing functions have
been activated on the amplifier. If they have,
turn them off.

There is hum or noise in the speaker output.

•Make sure all the connections have been
correctly made.

•Make sure none of the audio components are
positioned too close to the TV set.

The sound has suddenly stopped.

•Make sure all the connections have been
correctly made. Contact between bare
speaker wires at the speaker terminals may
cause a short-circuit.

THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND 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/
specified.

f

•

: internal component.

4

W or less unless otherwise

• C : panel designation.

Note:

The components identi­fied by mark 0 or dotted
line with mark 0 are criti­cal for safety.
Replace only with part
number 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.

• 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 produc­tion tolerances.

• Signal path.
F : AUDIO

•Abbreviation
CND : Canadian model.

2-2. CIRCUIT BOARDS LOCATION

MAIN board

POWER SWITCH board

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.

TERMINAL board

CONTROL board

POWER AMP board

POWER SUPPLY boar

33

SA-WMS367

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

A

B

C

D

1

234567891011 12 13 14

(Page 6)

T102

T202

C902

RY901

JW051

052
JW

C901

BC903

053
JW

BC902

BC901

F11

F901

CN1

R711

Q701

R710

C705

D703

R709

R707

C716

C710

708

C706

JW

D701

D702

R714

R708

R713

R705

C704

C702

R704

JW704

C712

CN702

JW705

R712

C707

JW703

C709

702
JW

R706

IC701

C703

707
JW

R702

(Page 6)

CN701

C701

709
JW

C708

701
JW

C711

JW711

Q702

R703

C713

R701

R715

SP401

R716

R717

E

F

G

H

J

I

• Semiconductor
Location

Ref. No. Location
D203 I-3

D301 H-8
D302 H-8
D303 H-8
D304 I-8
D305 H-9
D306 H-9
D400 F-12
D401 E-8
D531 H-12
D532 G-13
D533 I-12
D701 B-9
D702 B-9
D703 B-8
D805 F-8
D901 E-4

IC530 H-13
IC701 C-10

Q101 H-11
Q102 H-11
Q103 H-11
Q104 I-12
Q105 H-11
Q301 H-9
Q302 H-9
Q401 F-11
Q402 E-11
Q403 F-12
Q404 E-12
Q531 G-13
Q532 I-12
Q533 H-13
Q534 I-12
Q535 I-11
Q701 C-8
Q702 C-12

BC202

C201

S201

D203

CN904

BC203

D901

F12

811
JW

BC801

C806

BC802

G1

C805

JW301

JW302

C301

C302

D301

D302

D303

D304

C304

R401

C803

C804

C305

44

D401

C306

D805

JW807

R303

C303

JW802

Q302

Q301

JW808

801
JW

804
JW

805

D306

R304

JW

809
JW

R800

810

C308

JW

R541

D305

C801

BC803

C307

C802

JW827

R402

R403

JW812

828
JW

829
JW

R542

R540

C401

Q401

817
JW

Q103

Q101

R404

R104

JW816

R101

Q535

Q402

R400

CN804

JW837

R106

R102

R405

C402

JW813

Q105

Q102

834
JW

C102

103
R

JW830

C101

R105

Q534

Q404

Q403

JW818

Q104

C403

JW833

819
JW

JW832

JW814

C531

820
JW

D533

821
JW

Q532

D400

R531

BC401

R532

R406

Q531

D531

JW822

JW823

R535

R534

RY400

CN805

JW825

R536

JW835

C532

IC530

824
JW

G2

JW826

D532

R538

Q533

R539

R533

R537

2-4. SCHEMATIC DIAGRAM — MAIN SECTION — • Refer to page 8 for IC Block Diagram.

SA-WMS367

C705

R708

C716

D702

R714

C710

R707

R712

D701

R705

C706

C707

IC701

R706

C701C702

C709

C703R702 R703

R704

C704

C708

R701

IC B/D

R715

R716

C711

Q702

C713

(Page 7)

R717

CN804

CN701 CN805

C531

C307

C308

R531

C101

IC530(2/2)

D305

D306

Q104

D531

Q302

Q301

Q531

R105

R103

Q102

R800

R303

C305

C306

R304

R532D532

R533

C303

C304

Q532

C532

C801

C802

D302

D301

D304

D303

R534

R102

R535

R537

IC530(1/2)

R536

Q101

D805

R101

R538

C301

C302

D533

C804

C803

R539

Q533

Q534

Q535

R540

BC803 BC203

R541

R542

BC802 CN904

C806

C805

BC801 CN905

D901

T102

T202

D203

RY901

C902

BC903

CN102

C201

BC202

F901

S201

BC902

BC901

CN1

C901

(Page 7)

CN702

R709

Q701

R711

D703

C712

R713

R710

R406

Q404

C403

C102

Q403

Q105

Q402

R104

R106

R404

R405

Q103

R403

R402

D401

R401

Q401

C401

RY400

400
D

C402

55

BC401

SP401

R400