SONY SAWFT7 - Service Manual Immediate Download

Ver. 1.1 2005. 11

SERVICE MANUAL

US Model

Canadian Model

AEP Model

UK Model

SPECIFICATIONS

Sony Corporation

Home Audio Division

Published by Sony Engineering Corporation

9-879-750-02

2005K04-1

HOME THEATRE SPEAKER SYSTEM

SS-FRF7ED

(with WS-FT7)

SA-FT7ED/WFT7/SS-CNF7ED/

FRF7ED/WS-FT7

SS-CNF7ED

AUDIO POWER SPECIFICATIONS (US, CND model)

POWER OUTPUT AND TOTAL HARMONIC DISTORTION:

With 4 ohm loads both channels driven, at 100 Hz; rated 250

watts per channel minimum RMS power, with no more than

10% total harmonic distortion from 250 milliwatts to rated output.

SS-FRF7ED (front/surround speakers)

Speaker system

2 way, magnetically shielded

Speaker units

Woofer: 10 cm (4 in.), cone

type

Tweeter: 20 mm (3/4 in.),

dome type

Enclosure type

Bass reflex

Rated impedance

8 ohms

Power handling capacity

Maximum input power:

120 W

Sensitivity level

84 dB (1 W, 1 m)

Frequency range

120 Hz 70,000 Hz

Dimensions (w/h/d)

Approx. 130

× 510 × 30 mm

(5 1/8

× 20 1/8 × 1 3/16 in.)

with floor stand

Approx. 130

× 1,100 × 30 mm

(AEP, UK model)

(5 1/8

× 43 5/16 × 1 3/16 in.)

(Diameter of base: 280 mm

(11 1/32 in.))

with table top stand

Approx. 130

× 585 × 30 mm

(5 1/8

× 23 1/8 × 1 3/16 in.)

(Diameter of base: 250 mm

(9 7/8 in.))

with wall mounting bracket

Approx. 130

× 576 × 50 mm

(5 1/8

× 22 3/4 × 2 in.)

Mass

Approx. 2.0 kg (4 lb 7 oz)

with floor stand

Approx. 7.7 kg (16 lb 15 oz)

(AEP, UK model)

with table top stand

Approx. 3.3 kg (7 lb 4 oz)

with wall mounting bracket

Approx. 2.5 kg (5 lb 9 oz)

SS-CNF7ED (center speaker)

Speaker system

2 way, magnetically shielded

Speaker units

Woofer: 8 cm (3 1/4 in.), cone

type (

× 2)

Tweeter: 20 mm (3/4 in.),

dome type

Enclosure type

Bass reflex

Rated impedance

8 ohms

Power handling capacity

Maximum input power:

120 W

Sensitivity level

84 dB (1 W, 1 m)

Frequency range

130 Hz 70,000 Hz

Dimensions (w/h/d)

Approx. 500

× 94 × 30 mm

(19 3/4

× 3 3/4 × 1 3/16 in.)

with table top stand

Approx. 500

× 108 × 66 mm

(19 3/4

× 4 3/8 × 2 5/8 in.)

with wall mounting bracket

Approx. 500

× 94 × 42 mm

(19 3/4

× 3 3/4 × 1 11/16 in.)

· SA-FT7ED is composed of following models.

COMPONENT MODEL NAME

FRONT/SURROUND SPEAKER

SS-FRF7ED

CENTER SPEAKER

SS-CNF7ED

SUBWOOFER

SA-WFT7

SPEAKER STAND

WS-FT7

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

SA-WFT7

SS-FRF7ED

Continued on next page

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

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.

To Exposed Metal

Parts on Set

0.15µF

1.5k

voltmeter

(0.75V)

Earth Ground

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

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 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. 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)

Mass

Approx. 1.6 kg (3 lb 8 oz)

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 subwoofer,

magnetically shielded

Speaker units

Woofer: 15 cm (6 in.), cone

type

Enclosure type

Acoustically Loaded

Bass reflex

Reproduction frequency range

26 Hz 200 Hz

Continuous RMS power output

250 W (4 ohms 100 Hz,

10% THD)

Input

LINE IN (input pin jack)

General

Power requirements

US, CND model:

120 V AC, 60 Hz

AEP, UK model:

220 240 V AC, 50/60 Hz

Power consumptions

65 W

0.3 W (standby mode)

Dimensions (w/h/d)

Approx. 175

× 610 × 298 mm

× 24 1/8 × 11 3/4 in.)

Mass

Approx. 11 kg (24 lb 4 oz)

WS-FT7 (speaker stand)

Dimension (w/h/d)

Approx. 130

× 635 × 30 mm

(5 1/8

× 25 × 1 3/16 in.)

(Diameter of base: 280 mm

(11 1/8 in.))

Mass

Approx. 5.7 kg (12 lb 9 oz)

Supplied accessories

SA-FT7ED:

Speaker cord (3.5 m) (3)

Speaker cord (10 m) (2)

Pin cord (2 m) (1)

Floor stand (2) (AEP, UK model)

Terminal adapter (4)

Table top stand base (4) (US, CND model)

Table top stand base (2) (AEP, UK model)

Center speaker stand base (1)

Center speaker stand adjuster (1)

Wall mounting bracket (for the front/surround speakers) (4)

Wall mounting bracket (for the center speaker) (1)

Wall mounting hook (10)

Hex-head screw (8)

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

Screw (M5) (10) (AEP, UK model)

Screw (M4) (20)

Wrench (1)

L-adapter (1)

Sticker for the speakers (1)

Sticker 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)

Hex-head screw (2)

Screw (M5) (4)

Screw (M4) (4)

Screw (for wall mounting bracket) (2)

Wrench (1)

Sticker 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

TABLE OF CONTENTS

1. SERVICING NOTES

1-1. Service Position (SA-WFT7) .............................................. 4

1-2. Note for Replacement of the Speaker Unit (SA-WFT7) ..... 4

1-3. Note for Disassembly of the Top Cover (SS-FRF7ED)

and Side Cover (SS-CNF7ED) ............................................ 5

2. DISASSEMBLY

2-1. Top Cover ............................................................................ 6

2-2. AMP Board, FILTER Board ................................................ 7

2-3. POWER Board .................................................................... 7

2-4. Bottom Cover (B) Assy ....................................................... 8

2-5. INPUT Board ...................................................................... 8

2-6. ACIN Board ......................................................................... 9

3. DIAGRAMS

3-1. Circuit Boards Location .................................................... 10

3-2. Block Diagram .................................................................. 11

3-3. Printed Wiring Boards Filter Section ............................ 12

3-4. Schematic Diagram Filter Section ................................ 13

3-5. Printed Wiring Board Amp Section (1/2) ...................... 14

3-6. Printed Wiring Board Amp Section (2/2) ...................... 15

3-7. Schematic Diagram Amp Section ................................. 16

3-8. Printed Wiring Boards Power Section ........................... 17

3-9. Schematic Diagram Power Section ............................... 18

4. EXPLODED VIEWS

4-1. Front/Surround Speaker Section (SS-FRF7ED) ............... 21

4-2. Center Speaker Section (SS-CNF7ED) ............................. 22

4-3. Speaker Stand Section (WS-FT7) ..................................... 23

4-4. Subwoofer Section (1) (SA-WFT7) .................................. 24

4-5. Subwoofer Section (2) (SA-WFT7) .................................. 25

4-6. Bracket, Base Section ........................................................ 26

5. ELECTRICAL PARTS LIST ........................................ 27

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

1-1. SERVICE POSITION (SA-WFT7)

When repairing or servicing this set, arrange the boards as shown below.

SECTION 1

SERVICING NOTES

1-2. NOTE FOR REPLACEMENT OF THE SPEAKER UNIT (SA-WFT7)

FILTER board

POWER board

AMP board

SWITCH board

Pulled and raised gripping

this position with pliers.

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

1-3. NOTE FOR DISASSEMBLY OF THE TOP COVER (SS-FRF7ED) AND SIDE COVER (SS-CNF7ED)

Pry the cover with a scraper

to aboid damage.