SONY Texas Instruments Service Manual
SA-WM500
SERVICE MANUAL
Ver 1.2 2004.09
SPECIFICATIONS
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC
DISTORTION:
With 6 ohm loads, from 20 – 200 Hz; rated 150 watts, minimum RMS
power, with no more than 0.7 % total harmonic distortion from 250
milliwatts to rated output.
System
Type
Active Subwoofer (magnetically shielded design)
Speaker unit
Woofer: 30 cm dia. (12 in.), cone type
Amplifier section
Continuous RMS output : (0.7%) 150W
Reproduction frequency range
20 Hz – 200 Hz
High frequency cut-off frequency
50 Hz – 200 Hz
Phase selector
NORMAL, REVERSE
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
General
Power requirements
USA and Canada models: 120 V AC, 60 Hz
AEP, UK, MY, SP models: 230 V AC, 50/60 Hz
AUS model : 240V AC, 50/60 Hz
TW model : 110 V AC, 60Hz
Power consumption
120 W
Dimensions
Approx. 360 x 425 x 412 mm
(14 1 / 4 x 16 3 / 4 x 16 1 / 4 in.) (w/h/d)
Mass
18 kg (39.6 lb 1oz)
Supplied accessories
Foot pads (4)
Audio connecting cord (1 phono – 1 phono),
2 m (6 ft 6 1 / 2 in.) (1)
Speaker cords, 2.5 m (8 ft 2 1 / 2 in.) (2)
Design and specifications are subject to change without notice.
Inputs
Input jacks
LINE IN: input pin jack
SPEAKER IN: input terminals
Output jacks
LINE OUT: output pin jack
SPEAKER OUT: output terminals
9-877-136-03
2004I02-1
© 2004.09
Sony Corporation
Audio Group
Published by Sony Engineering Corporation
ACTIVE SUBWOOFER
SA-WM500
SAFETY CHECK-OUT
(US model)
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 AC 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
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
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)
TABLE OF CONTENTS
Specifications ........................................................................... 1
1. GENERAL ...................................................................... 3
2. DIAGRAMS
2-1. Circuit Boards Location ............................................. 4
2-2. Printed Wiring Boards ................................................ 5
2-3. Schematic Diagram ..................................................... 6
3. EXPLODED VIEWS
3-1. Main Section ............................................................... 7
4. ELECTRICAL PARTS LIST..................................... 8
To Exposed Metal
Parts on Set
0.15µF
1.5kΩ
Earth Ground
AC
voltmeter
(0.75V)
Fig. A. Using an AC voltmeter to check AC leakage.
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.
2
• Location of controls
POWER
SECTION 1
GENERAL
POWER SAVE
AUTO
OFF
LEVEL
SA-WM500
This section is extracted from
instruction manual.
PHASE
CUT OFF FREQ
REVERSENORMAL
POWER POWER indicator
MIN MAX
50Hz
200Hz
CUT OFF FREQLEVEL PHASE
3
SA-WM500
d
Ver 1.1 2003.06
SECTION 2
DIAGRAMS
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.
For Printed Wiring Boards.
Note :
• X : parts extracted from the component side.
• x : parts extracted from the conductor side.
• : Pattern from the side which enables seeing.
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/
• C : panel designation.
Note:
The components identified by mark 0 or dotted
line with mark 0 are criti-
cal 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.
• 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
MY : Malaysia model
SP : Singapore model
AUS : Australian model
TW : Taiwan model
4
W or less unless otherwise 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.
2-1. CIRCUIT BOARDS LOCATION
CONTROL board
MAIN board
POWER AMP boar
POWER SUPPLY board
LED board
POWER SWITCH board
4
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