SA SA VE702, SA-VE705 Service Manual

SA-VE702/VE705/

WMS7/SS-MS7

SERVICE MANUAL

Ver 1.1 2002. 10

The SA-VE702 system consists of one unit
of SA-WMS5 and two units of SS-MS7.
The SA-VE705 system consists of one unit
of SA-WMS7 and five units of SS-MS7.

AUDIO POWER SPECIFICATIONS:

US model

POWER OUTPUT AND TOTAL
HARMONIC DISTORTION :

with 8 Ω loads, both channels driven, from 20 - 150Hz; rates
120 W per channel minimum RMS power, with no more
than 0.8% total harmonic distortion from 250 mW to rated
output.

SS-MS7 (front, center, and rear speakers)

Speaker system 2 way, magnetically shielded
Speaker units

Tweeter : 1.9 cm (
Woofer : 5 cm (

Enclosure type Bass reflex
Rated impedance 8 Ω
Power handling capacity
Maximum input power: 140 W
Sensitivity level 87 dB (1W, 1m)
Frequency range 120 Hz - 40,000 Hz
Dimensions (w/h/d)

When attached speaker grilles:

When attached to supplied speaker stand:

3

/4 in.), dome type

2 in.)× 2, balanced drive

type

Approx. 86 × 169 × 130 mm

1

(3

/2 × 63/4 × 51/8 in.) each

Approx. 96 × 207 × 141 mm
(37/8 × 81/4 × 55/8 in.) each
(Front (and rear)speakers)
Approx. 169 × 131 × 144 mm
(63/4 × 51/4 × 53/4 in.),
(Center speaker: pointed upwards)
Approx. 169 × 118 × 141 mm
(63/4 × 43/4 × 55/8 in.),
(Center speaker: pointed
downwards):

Photo : SA-WMS7

SPECIFICATIONS

Mass

When attached speaker grilles:

When attached to supplied speaker stand:

SS-WMS7 (subwoofer)

System

Speaker system Active subwoofer, magnetically

Speaker unit Woofer : 20 cm (8 in.),

Enclosure type Advanded SAW type
Practical maximum output

Reproduction frequency range

Inputs

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

Outputs

LINE OUT (output pin jack)
SPEAKER OUT (output terminals)

General

Power requirements
USA and Canada : 120 V AC, 60 Hz
Europe : 220 - 230 V AC, 50/60 Hz
Others : 220 - 240 V AC, 50/60 Hz
Power consumptions 80 W
Dimensions (w/h/d) Approx. 230 × 380 × 470 mm

Mass Approx. 17 kg

Approx. 1.3 kg (2lb 14oz) each

Approx. 1.4 kg (3lb 1oz) each,
(Front (and rear) speakers)
Approx. 1.4 kg (3lb 1oz)(Center
speaker)

shielded

cone type

120 W

24 Hz - 150 Hz

1

/8 × 15 × 185/8 in.), including

(9
front grille

(37 lb 8oz)

Photo : SS-MS7

US Model

Canadian Model

SA-VE705/WMS7/SS-MS7

AEP Model

UK Model

E Model

Supplied accessories

SA-VE705

Speaker stands (for the front and rear speakers) (4)
Speaker stand (for the center speaker) (1)
Screws (for the speaker stands) (10)

Washers (for the speaker stands) (10)
Brackets (for the front and rear speaker stands) (4)
Speaker grilles (5)
Audio connecting cord (1)
Speaker connecting cords, 2.5 m(8 ft

Speaker connecting cords, 10 m(32 ft

SA-VE702

Speaker stands (for the front speakers) (2)
Screws (for the speaker stands) (4)
Washers (for the speaker stands) (4)
Brackets (for the front speaker stands) (2)
Speaker grilles (2)
Audio connecting cord (1)
Speaker connecting cords, 2.5 m(8 ft

Design and specifications are subject to change
without notice

21/2 in.) (5)

93/4 in.) (2)

21/2 in.) (4)

9-928-978-12

2002J1600-1
© 2002.10

MICRO SATELLITE SYSTEM

Sony Corporation

Home Audio Company
Published by Sony Engineering Corporation

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 A C 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 microamperes).
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. Follo w 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 v oltmeter . The “limit” indication
is 0.75 V, so analog meters must have an accurate lo w-v oltage
scale. The Simpson 250 and Sanwa SH-63Trd are e xamples of
a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2V AC range are suitable. (See
Fig. A)

T o Exposed Metal

Parts on Set

AC

µ

F

0.15

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

1.5 k

Ω

Earth Ground

Voltmeter
(0.75 V)

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK ! OR DO TTED LINE WITH
MARK ! 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

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS P AR UNE MARQUE ! SUR LES
DIAGRAMMES SCHÉMA TIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.

SECTION 1

B

These are omitted.

CE

Q

d

T

GENERAL

SECTION 2

SA-VE702/VE705/WMS7/SS-MS7

DIAGRAMS

• Location of Controls

SA-WMS7
– Front view –

– Rear view –

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

Note on Printed Wiring Board:

• X : parts extracted from the component side.

• b : Pattern from the side which enables seeing.

(The other layers' patterns are not indicated.)

• Indication of transistor.

Note on Schematic Diagram:

• 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.

• 2 : nonflammable resistor.

• C : panel designation.

Note:

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

• U : B+ Line.

• V : B– Line.

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

• Voltages are tak en with a V OM (input impedance 10 MΩ).
Voltage variations may be noted due to nor mal produc­tion tolerances.

• Signal path.
F : AUDIO

• Abbreviation
CND : Canadian

4

W or less unless otherwise

Note:

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

• Circuit Boards Location
SA-WMS7

LINE IN/OUT jack

SPEAKER IN/OU
terminal

LED board

POWER SAVE
switch

CONTROL board

POWER SWITCH board

POWER board

MAIN boar

AUTO POWER board

33

SA-VE702/VE705/WMS7/SS-MS7

2-2. SCHEMATIC DIAGRAM • See page 7 for IC Block Diagrams.

MOVIE

0.47

0.047

2.2k

2.2k

1.5k

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

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

22k

0.22
2W

ON/STAND BY

44

2-3. PRINTED WIRING BOARD MAIN SECTION • See page 3 for Circuit Boards Location.

SA-VE702/VE705/WMS7/SS-MS7

A

B

C

D

12

34567891011121314

• Semiconductor

Location

Ref. No. Location

D101 F-12
D102 G-12
D103 F-13
D104 F-13
D105 G-13
D106 G-12
D107 H-13
D108 G-13
D303 E-10
D304 E-7
D501 H-6
D503 E-6
D504 D-6

IC101 G-13
IC102 G-13
IC301 E-12
IC302 G-11
IC303 D-9
IC501 E-7
IC502 D-7

Q401 D-4
Q402 C-5
Q403 D-5
Q404 B-5

E

F

G

H

D303

I

55