Sony SAWD-100 Service manual

SA-WD100

SERVICE MANUAL

Ver 1.0 2002. 03

SPECIFICATIONS

AUDIO POWER SPECIFICATIONS

POWER OUTPUT AND TOTAL HARMONIC
DISTORTION:
With 3 ohm loads, from 26 – 200 Hz; rated 250 watts,
minimum RMS power, with no more than 0.8 % total
harmonic distortion from 250 milliwatts to rated
output.

System

Type

Active Subwoofer

Speaker unit

Woofer: 13.5 cm dia. (5 3/8 in.), cone type

Continuous RMS output

North American model (0.8%) : 200 W
European model (DIN) : 200 W
Other models (0.8%) : 200 W

Reproduction frequency range

26 Hz – 200 Hz

High frequency cut-off frequency

50 Hz – 200 Hz

Phase selector

NORMAL, REVERSE

Inputs

Input jacks

LINE IN: input pin jack
SPEAKER IN: input terminals (ELP plug 6P)

Output jacks

LINE OUT: output pin jack
SPEAKER OUT: output terminals

US Model

Canadian Model

AEP Model

UK Model

General

Power requirements

North American model : 120 V AC, 60 Hz
European model : 220 - 240 V AC, 50/60 Hz
Other models : 220 - 240 V AC, 50/60 Hz

Power consumption

North American model : 50 W
Other models : 50 W

Dimensions

Approx. 165 × 325 × 425 mm
(w/h/d) (6

Mass

10 kg (22 lb 1 oz)

Supplied accessories

Audio connecting cord
(1 phono plug – 1 phono plug) (1)
Speaker cords (1)

Design and specifications are subject to change without
notice.

1 W (Standby mode)

1

/2 × 12 7/8 × 16 3/4 in.)

E Model

9-873-640-01

2002C1600-1
© 2002.03

ACTIVE SUBWOOFER

Sony Corporation

Home Audio Company
Published by Sony Engineering Corporation

SA-WD100

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 A C leakage from any e xposed 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 voltmeter . The “limit” indication
is 0.75 V, so analog meters must have an accurate low-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)

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 IDENTIFÉS P AR UNE MARQUE 0 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.

Notes on chip component replacement

•Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be

damaged by heat.

Flexible Circuit Board Repairing

•Keep the temperature of soldering iron around 270˚C

during repairing.

• Do not touch the soldering iron on the same conductor of the

circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering

or unsoldering.

To Exposed Metal

Parts on Set

AC

0.15 µF

Fig. A. Using an A C v oltmeter to check A C leakage.

1.5 kΩ

Earth Ground

Voltmeter
(0.75 V)

2

SECTION 1

d

DIAGRAMS

SA-WD100

Note on Printed Wiring Board:

• X : parts extracted from the component side.

a

•

• b : Pattern from the side which enables seeing.

• Indication of transistor

B

Q

CE

: Through hole.

These are omitted.

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 0 or dotted
line with mark 0 are criti­cal for safety.
Replace only with part
number specified.

• A : B+ Line

• B : B– Line

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

•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
SP : Singapore model

4

W or less unless otherwise

Note:

Les composants identifiés par
une marque 0 sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.

• Circuit Boards Location

POWER SWITCH board

LED board

CONTROL board

MAIN POWER board

INPUT
SELECT boar

INPUT board

AUTO POWER board

3

SA-WD100

• IC Block Diagrams

IC901 STR-F6676 (AEP, UK, SP)

COMP.1

COMP.2

IC901 STR-F6426S (US, CND)

COMP.1

LATCH O.V.P.

T.S.D.

OSC DRIVE

DS GNDVCCFB/OCP

LATCH O.V.P.

T.S.D.

START

REG.

ICONST

54321

START

REG.

COMP.2

OSC DRIVE

54321

DS GNDVCCFB/OCP

4

1-1. Printed Wiring Board – Control Section – • See page 3 for Circuit Boards Location.

LEVEL

SA-WD100

IC304

IC302

IC301

IC102

IC103

IC101

• Semiconductor Location

Ref. No. Location

D101 B-6
D102 B-5
D103 B-6
D104 B-5
D105 A-6
D106 A-6

Ref. No. Location

IC101 B-6
IC102 A-6
IC103 B-6
IC301 A-3
IC302 B-3
IC304 A-1

Ref. No. Location

Q101 D-6
Q102 D-6
Q103 D-6
Q104 D-5
Q105 D-6
Q301 A-2
Q302 A-2

55