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SERVICE MANUAL
Sony Corporation
Audio Group
Published by Sony Engineering Corporation
US Model
Canadian Model
SA-WMSP87
AEP Model
UK Model
SA-WMSP87E
E Model
Australian Model
SA-WMSP87
ACTIVE SUBWOOFER
9-879-452-02
2005J16-1
© 2005.10
Ver. 1.1 2005.10
SPECIFICATIONS
SA-WMSP87/WMSP87E
· SA-WMSP87/WMSP87E are the
sub woofer section in HT-5950DP/
DDW675 and HT-DDW870.
Photo: SA-WMSP87
M
·
·
odels of area code CEL, CEK
(SA-WMSP87E)
Models of other area code (SA-WMSP87)
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC
DISTORTION:
(Models of area code U only)
With 6 ohm loads, from 28 ­ 200 Hz; rated 100
watts, minimum RMS power, with no more than
0.7% total harmonic distortion from 250
milliwatts to rated output.
Speaker system
Active subwoofer,
magnetically shielded
Speaker unit
200 mm (7 7/8 inches)
cone type
Enclosure type
Acoustically loaded bass
reflex
RMS output
Models of area code U, CA
155 W (5 ohms, 100 Hz,
THD 10%)
Models of area code CEL, CEK
120 W (6 ohms, 100 Hz,
THD 10%)
Models of other area code 110 W (6 ohms, 100 Hz,
THD 10%)
Input
LINE IN (input pin jacks)
Power requirements
Power consumption
100 W
Dimensions (w/h/d) (Approx.)
270
× 325 × 398 mm
(10 5/8
× 12 3/4 × 15 5/ × 8
inches)
Mass (Approx.)
9.0 kg (19 lb 14 oz)
Area code
Power requirements
U, CA
120 V AC, 60 Hz
MX
127 V AC, 60 Hz
CEL, CEK
230 V AC, 50/60 Hz
AU
240 V AC, 50 Hz
SP
220 ­ 230 V AC,
50/60 Hz
E51
120/220/240 V AC,
50/60 Hz
·Abbreviation
AU
: Australian model
CA
: Canadian model
CEK
: UK model
CEL
: AEP model
E51
: Chilean and Peruvian model
MX
: Mexican model
SP
: Singapore model
U: US model


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2
SA-WMSP87/WMSP87E
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 2 V AC range are suitable. (See
Fig. A)
Fig. A.
Using an AC voltmeter to check AC leakage.
1.5 k
0.15
µF
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
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 COM- POSANTS
QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT
DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS
PUBLIÉS PAR SONY.
MODEL IDENTIFICATION
­ Rear Side ­
INPUT
SUBWOOFER
SATTELLITE SPEAKER
CENTER SPEAKER
Part No.
·Abbreviation
AUS: Australian model
CND
: Canadian model
E51
: Chilean and Peruvian model
MX
: Mexican model
SP
: Singapore model
Model
Part No.
US, CND models
2-549-538-0[]
SP model
2-549-540-0[]
AUS model
2-549-543-0[]
E51 model
2-549-545-0[]
MX model
2-549-549-0[]
AEP, UK models
2-589-803-0[]


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3
3
SA-WMSP87/WMSP87E
SA-WMSP87/WMSP87E
Note on Printed Wiring Boards:
· X : parts extracted from the component side.
· Y : parts extracted from the conductor side.
·
: Pattern from the side which enables seeing.
Note on Schematic Diagrams:
· All capacitors are in
µF unless otherwise noted. (p: pF) 50
WV or less are not indicated except for electrolytics and
tantalums.
· 2 : nonflammable resistor.
· 5 : fusible resistor.
· All resistors are in
and 1/4 W or less unless otherwise
specified.
· C : panel designation.
· A : B+ Line.
· B : B­ Line.
·Voltages and dc with respect to ground under no-signal
conditions.
no mark : Power on
·Voltages are taken with a VOM (Input impedance 10 M
).
Voltage variations may be noted due to normal production
tolerances.
· Signal path.
F
: AUDIO
·Abbreviation
CND
: Canadian model
E51
: Chilean and Peruvian model
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
Note:
The components identi-
fied by mark 0 or dot-
ted line with mark 0 are
critical for safety.
Replace only with part
number specified.
Note:
Les composants identifiés
par une marque 0 sont cri-
tiques pour la sécurité.
Ne les remplacer que par une
piéce por tant le numéro
spécifié.
· Circuit Boards Location
CONTROL board (WMSP87)
INPUT board
MAIN board
POWER TRANS board
SWITCH board (WMSP87)
CONTROL board
(WMSP87E)
SWITCH board
(WMSP87E)
LED board
(WMSP87E)
(WMSP87E)
(WMSP87)
SECTION 1
DIAGRAMS
MEMO


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4
4
SA-WMSP87/WMSP87E
SA-WMSP87/WMSP87E
1-1. PRINTED WIRING BOARD -- WMSP87 --
·
:Uses unleaded solder.
· See page 3 for Circuit Boards Location.
POWER
POWER
2
1
41
POWER
RV801
12
1
1
6
2
EXCEPT
E51
EXCEPT
E51
FH902
FH952
F902
E51
VOLTAGE
SELECTOR
S2
240V
220V
120V
F901
AC IN
(CHASSIS)
E
1
13
14
85
14
85
E
E
E
E
12
13
(CHASSIS)
2
1
SP1
(WOOFER)
+
­
INPUT
IC301
IC202
IC203
T1
POWER
TRANSFORMER
1
A
B
C
D
E
F
G
H
23456789
10
11
12
13
· Semiconductor
Location
Ref. No.
Location
D205
C-11
D206
C-11
D301
E-8
D302
E-8
D304
C-10
D401
C-7
D402
C-8
D403
C-8
D501
B-9
D502
E-8
D602
B-10
D901
C-2
IC202
C-11
IC203
C-12
IC301
E-10
Q501
B-9
Q502
C-10
Q503
B-10
Q504
B-10
Q505
E-8


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5
5
SA-WMSP87/WMSP87E
SA-WMSP87/WMSP87E
1-2. PRINTED WIRING BOARD -- WMSP87E --
·
:Uses unleaded solder.
· See page 3 for Circuit Boards Location.
1
A
B
C
D
E
F
G
H
I
J
23456789
10
11
12
13
IC203
IC202
IC301
3
(CHASSIS)
(CHASSIS)
C801
RV201
CNP801
C101
C201
R110
CN101
J101
JW206
R202
CN901
D901
CN402
CN301
CN204
RY301
C401
C402
C405
C407
C408
D402
D403
Q501
Q502
Q503
Q504
D501
C501
C502
C503
R403
R404
C308
C306
C307
R307
C302
R301
R302
R401
R402
D304
R311
R312
C309
C310
R502
R503
JW102
JW116
C303
JW114
JW115
R308
D401
D301
JW106
R309
R303
C301
JW301
R508
Q505
R506
D502
R507
JW401
JW124
JW126
JW127
JW501
C312
C314
R505
R304
R501
G1
G2
JW112
R500
SP1
C409
C410
C313
R313
D302
C406
R207
C203
C204
R208
AEP,UK
R209
R210
R205
R212
R213
C208
R216
R214
C210
R217
C207
C305
C304
R504
C601
D602
R601
D205
D206
C205
C206
JW123
JW105
JW402
JW107
JW108
JW132
JW109
R305
C311
CN202
JW125
JW110
R314
JW
111
JW129
R306
JW101
CNP111
C404
JW404
JW403
JW103
JW104
C211
C209
JW117
JW118
R211
JW120
JW121
JW130
JW131
JW122
JW133
JW134
JW119
R206
R310
C403
JW135
JW136
S901
C901
CN3
CN1
CN2
JW1
FH951
F901
C2
T1
CNP401
FH901
JW2
R317
C318
C316
C317
C315
· Semiconductor
Location
Ref. No.
Location
D205
E-10
D206
E-11
D301
G-7
D302
G-8
D304
E-9
D401
D-6
D402
D-7
D403
D-7
D501
D-8
D502
G-7
D602
D-10
D901
A-10
IC202
E-11
IC203
E-12
IC301
G-9
Q501
D-9
Q502
D-9
Q503
D-10
Q504
D-10
Q505
G-7