Sony ss wsft 7 service manual

Page 1

SA-FTTED/WFTTISS-CNFTED/
FRFTED/WS-FTT

SERVICE MANUAL us Model

Canadian Model
AEP Model
UK Model

Ver. 1.1 2005. 11

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SA-WFT7 SS-FRF7ED SS-FRF7ED SS-CNF7ED

(with WS-FT7)
- SA-FT7ED is composed of following models.
COMPONENT MODEL NAME
FRONT/SURROUND SPEAKER SS-FFIF7ED
CENTER SPEAKER SS-CNF7ED
SUBWOOFER SA-WFT7
SPEAKER STAND WS-FT7

WS-FT7 is not included in US and Canadian model.

SPECIFICATIONS
AUDIO POWER SPECIFICATIONS (US, CND model) Mass Approx. 2.0 kg (4 1b 7 oz)
POWER OUTPUT AND TOTAL HARMONIC DISTORTION: with 00 find APPW- 77 k3 5 3 15 01)
With 4 ohm loads both channels driven, at 100 Hz; rated 250 (AER UK medal)
watts per channel minimum RMS power. with no more than 3:: iihheggifigg brmkgppmx. 13 kg (7 1b 4 OZ)
10% total harmonic distortion from 250 miliiwatts to rated output. k Approx. 2.5 kg (5 1b 9 oz)
SS-FRF7ED (front/surround speakers) SS-CNF7ED (center speaker)
Speaker Swen! 2 way- Imgneficfilly Shielded Speaker system 2 way. magnetically shielded
Speaker units Woofer: 10 cm (4 in), cone speaker units Woofer: 8 cm (3 1/4 in). cone
type type (X 2)
Tweeter: 20 mm (m in), Tweeter: 20 ntnt (3/4 in),
dome type dome type
Enclosure type Bass reflex Enclosure type Bass reflex
Rated impedance 8 °th Rated impedance 8 ohms
Power handling capacity Power handling capacity
MaXImum inpm power: 120W Maximum inpttt power: 120 w
Sensitivity level 84 dB (1 W. l m) Sensttitity level 84 dB (1 W. 1 m)
Frequent) range 120 HZ , 70900 HZ Frequency range 130 Hz , 70.000 Hz
Dimenstons (w/h/d) Approx 130 X 510 X 30 mm Dimensions (w/h/d) Approx. 500 X 94 x 30 mm
(5 IIX X 20 HR ><13I|6in-l (19 m X 3 3/4 X13/16m.)
with floor stand Appmx 130 X L100 X 30 mm with table top stand Approx. 500 X 108 x 66 mm
(AEP. UK model) (5|lxX435/loX13/Ifim) (19}[4x43/xx25/xin.)
(Diameter of base: 280 mm wilh wall mounting bracket
(11 no tn )) Approx. 500 X 94 x 42 ntm
with table lop Stand Approx, 130 x 585 X 30 mm (19 3/4 x 3 3/4 x1 Illlo in.)
(3 IIX X 23 US X l we in.)
(Diameter ofbase: 250 mm - Continued on next page -
(9 7/1; tn ))

with wall mounting brackel

Approx. 130 X 576 X 50 mm

WW HOME THEATRE SPEAKER SYSTEM
9-879-750-02 Sony Corporation
2005K04-1 Home Audio Division
© 2005. 11 Published by Sony Engineering Corporation ®

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SA-FT7ED/WFT7/SS-CNF7ED/FRF7ED/WS-FT7

Mass Approx. 1.6 kg (3 lb 8 02)
with table top stand Approx. 1.8 kg (3 lb 15 oz)
with wall mounting bracket

Approx. 1.7 kg (3 lb 12 oz)

SA-WFT7 (subwoofer)

Speaker system Active subwooter.
magnetically slnelded
Speaker units Woofer: 15 cm (5 m), cone
type
Enclosure type Acottstlcally Loaded
Bass reflex
Reproduction frequency range
25 Hz , 200 Hz

Continuous RMS power output
250 w (4 ohms 100 Hz,

10% Tl-lD)
Input
LINE IN (input pm jack)
General
Power requirements
US. CND model: 120 V AC. 60 Hz
AEP. UK model: 220 r 240 V AC. 50/60 HZ
Power consumptions 65 W
0.3 w (standby mode)
DImensmnS (w/h/d) Approx. 175 x 610 x 298 mm
(7 x 24113 x 11 3/4 in.)
Mass Approx. 11 kg (24 lb 4 oz)

WS-FT7 (speaker stand)

Dimension (w/h/d) Approx. 130 x 635 x 30 mm
(51m x 25 x 1 mo in.)
(Drarneter of base: 280 mm
(11 1111 tn.))

Mass Approx. 5.7 kg (12 lb 9 oz)

Supplied accessories

SA-FT7E D:

Speaker cord (3.5 m) (3)

Speaker cord (10 m) (2)

Pin cord (2 m) (1)

Floor stand (2) (AER UK model)
Terminal adapter (4)

Tabletop stand base (4) (US, CND tnodel)
Tabletop stand base (2) (AEP. UK model)
Center speaker stand base (1)

Center speaker stand adjuster (1)

Wall mounting bracket (tor the front/surround speakers) (4)
Wall mounting bracket (for the center speaker) (1)
Wall mounting hook (10)

Hexrhead screw (8)

Screw (M5) (18) (US, CND model)

Screw (M5) (10) (AER UK model)

Screw (M4) (20)

Wrench (1)

Leadapler (1)

Stlcker for the speakers (1)

Stlcker for the terminal adapters (4)
Cleaning cloth (1)

SS-FRF7ED:

Speaker cord (10 m) (1)

Terminal adapter (1)

Table top stand base (1)

Wall mounting bracket (speaker side) (1)
Wall mounting bracket (wall side) (1)
Wall mounting hook (2)

Hexrhead screw (2)

Screw (M5) (4)

Screw (M4) (4)

Screw (for wall mounting bracket) (2)
Wrench (1)

Stlcker for the speakers (1)

Sticker for the terminal adapters ( 1)
Cleaning cloth (1)

WS-FT7:
Cleaning cloth (1)

Design and specifications are subject to change Without notice.

- Abbreviation
CND: Canadian model

2

SAFETY CHECK-OUT

After correcting the original service problem, perform the following
safety check before releasmg 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 ch sis, must not exceed 0.5 mA (500 microamperes).
Leakage culrent can be measured by any one of three methods.

l. 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.

1»

. Measuring the voltage drop across a resistor by means of aVOM
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)

To Exposed Metal
Parts on Set

A G
g 15kg voilmeier
(a. 75 V)

? Earth Ground

a. 15111:

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

SAFETY-RELATED COMPONENT WARNINGII

COMPONENTS IDENTIFIED BY MARK A 0R DOTTED LINE
WITH MARK A 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
A LA SECURITE

LES COMPOSANTS IDENTIFIES PAR UNE MAROUE A SUR LES
DIAGRAMMES SCHEMATIQUES ET LA LISTE DES PIECES
SONT CRITIQUES POUR LA SECURITE DE FONCTIONNEMENT.
NE REMPLACER CES COMPOSANTS QUE PAR DES PIECES
SONY DONT LES NUMEROS SONT DONNES DANS CE MANUEL
OU DANS LES SUPPLEMENTS PUBLIES PAR SONY.