Ver 1.4 2004.01
Home Audio Company
Published by Sony Engineering Corporation
· SA-WMSP75/WMSP85 are the sub woofer
: Australian model
: Canadian model
CEK : UK model
: AEP model
: Mexican model
: Singapore model
U: US model
POWER OUTPUT AND TOTAL
With 6 ohm loads, from 28 200 Hz; rated 75
watts (SA-WMSP75) / 100 watts (SA-WMSP85),
minimum RMS power, with no more than 0.8%
total harmonic distortion from 250 milliwatts to
rated output (Models of area code U only).
Woofer: 20 cm cone type
Acoustically loaded bass
Continuous RMS power output
(6 ohms, 20 250 Hz)
Reproduction frequency range
28Hz 200 Hz
High frequency cut-off frequency
LINE IN (input pin jacks)
U, CA, MX
120 V AC, 60 Hz
CEL, CEK, SP, AU 230 V AC, 50/60 Hz
120/220/230 V AC, 50/60 Hz
× 325 × 398
mm (10 3/4
× 12 7/8 × 15 3/4
inches) including front
10.0 kg (22 lb 1 oz)
9.0 kg (19 lb 14 oz)
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.
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
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.
A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers' instructions to use these
A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
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
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS 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 PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
Fig. A. Using an AC voltmeter to check AC leakage.
To Exposed Metal
Parts on Set
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size.)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
· Unleaded solder melts at a temperature about 40°C higher than
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
Caution: The printed pattern (copper foil) may peel away if the
heated tip is applied for too long, so be careful!
· Strong viscosity
Unleaded solder is more viscous (sticky, less prone to flow) than
ordinary solder so use caution not to let solder bridges occur such
as on IC pins, etc.
· Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
Note on Printed Wiring Boards:
· X : parts extracted from the component side.
· Y : parts extracted from the conductor side.
· b : Pattern from the side which enables seeing.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
Note on Schematic Diagram:
· All capacitors are in
µF unless otherwise noted. p: pF. 50
WV or less are not indicated except for electrolytics and
· 2 : nonflammable resistor.
· 5 : fusible resistor.
· All resistors are in
and 1/4 W or less unless otherwise
· C : panel designation.
· A : B+ Line.
· B : B Line.
·Voltages are dc with respect to ground under no-signal
no mark : Power on
·Voltages are taken with a VOM (Input impedance 10M
Voltage variations may be noted due to normal preduction
· Signal path.
CND : Canadian model.
: 120V AC Area in E model.
: Mexican model.
The components identified by
mark 0 or dotted line with mark
0 are critical for safety.
Replace only with part number
Les composants identifiés par
une marque 0 sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce portant le numéro spécifié.
1-1. Circuit Board Location
POWER TRANS BOARD
1-2. IC Block Diagrams
IC301 STK404-130S (MAIN Board)
IC301 STK-404-100S (MAIN Board)
1-3. Printed Wiring Board MAIN Section · See page 3 for Circuit Boards Location. ·
: Uses unleaded solder.
WMSP75 : 3P
WMSP85 : 6P
Ver 1.2 2003.06
1-4. Printed Wiring Board POWER Section · See page 3 for Circuit Boards Location. ·
: Uses unleaded solder.
Ver 1.2 2003.06