Sony SAWMSP-87 Service manual
SA-WMSP87/WMSP87E
SERVICE MANUAL
Ver. 1.1 2005.10
• SA-WMSP87/WMSP87E are the
sub woofer section in HT-5950DP/
DDW675 and HT-DDW870.
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)
Photo: SA-WMSP87
SPECIFICATIONS
US Model
Canadian Model
SA-WMSP87
AEP Model
UK Model
SA-WMSP87E
E Model
Australian Model
SA-WMSP87
Power requirements
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
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)
•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
9-879-452-02
2005J16-1
© 2005.10
ACTIVE SUBWOOFER
Sony Corporation
Audio Group
Published by Sony Engineering Corporation
SA-WMSP87/WMSP87E
r
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 manuf acturers’ instructions to use these
instruments.
2. A battery-operated A C 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 lo w-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 A C range are suitable. (See
Fig. A)
To Exposed Metal
Parts on Set
AC
0.15 µF
1.5 k
Ω
Earth Ground
voltmete
(0.75 V)
Fig. A. Using an AC voltmeter to check AC leakage.
MODEL IDENTIFICATION
– Rear Side –
SUBWOOFER
SATTELLITE SPEAKER
CENTER SPEAKER
Part No.
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[]
•Abbreviation
AUS: Australian model
CND : Canadian model
E51 : Chilean and Peruvian model
MX : Mexican model
SP : Singapore model
INPUT
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 SHO WN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
2
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 D ANS LES SUPPLÉMENTS
PUBLIÉS PAR SONY.
SECTION 1
DIAGRAMS
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 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 Ω and 1/
specified.
• 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 and dc with respect to ground under no-signal
conditions.
no mark : Power on
•Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage v ariations ma y be noted due to normal production
tolerances.
• Signal path.
F : AUDIO
•Abbreviation
CND : Canadian model
E51 : Chilean and Peruvian 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.
SA-WMSP87/WMSP87E
MEMO
• Circuit Boards Location
(WMSP87E) (WMSP87)
SWITCH board
(WMSP87E)
INPUT board
SWITCH board (WMSP87)
MAIN board
LED board
(WMSP87E)
POWER TRANS board
SA-WMSP87/WMSP87E
CONTROL board
(WMSP87E)
CONTROL board (WMSP87)
33
SA-WMSP87/WMSP87E
1-1. PRINTED WIRING BOARD — WMSP87 —
1
2345678910111213
A
2
B
POWER
1
C
POWER
D
12 1
• :Uses unleaded solder. • See page 3 for Circuit Boards Location.
(WOOFER)
RV801
POWER
41
AC IN
2
(CHASSIS)
SP1
+–
12
E
E
E
13
(CHASSIS)
• Semiconductor
Location
Ref. No.
D205 C-11
D206 C-11
D301 E-8
Location
D302 E-8
D304 C-10
E
D401 C-7
D402 C-8
D403 C-8
14
14
IC202 IC203
85
85
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
E
F
G
H
S2
VOLTAGE
SELECTOR
240V
220V
120V
F901
EXCEPT
E51
FH902
FH952
F902
E51
T1
POWER
TRANSFORMER
EXCEPT
E51
6
1
E
2 1
1
IC301
13
INPUT
SA-WMSP87/WMSP87E
44
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