Sony SSMS-445 Service manual
SA-VE445H/WMS445/
SS-MS445
SERVICE MANUAL
Ver 1.1 2003. 04
The SA-VE445H system consists of one
unit of SA-WMS445 and five units of SSMS445.
SA-VE445H
For the U.S. model
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC DISTORTION:
with 6 ohm loads both channels driven, from 20 – 200 Hz;
rated 135 watts per channel minimum RMS power, with
no more than 0.8% total harmonic distortion from
250 milliwatts to rated output.
SS-MS445 (front, center, and surround speakers)
Speaker system 2 way, magnetically shielded
Speaker units Woofer: 5.7 cm (2 1/4 in.),
balanced dome type
Tweeter: 2.5 cm (1 in.),
balance dome type
Enclosure type Bass reflex
Rated impedance 8 ohms
Power handling capacity
Maximum input power: 120 watts
Sensitivity level 84 dB (1 W, 1 m)
Frequency range 120 Hz – 50,000 Hz
Dimensions (w/h/d) Approx. 88 × 172 × 133 mm
(3 1/2 × 6 7/8 × 5 1/4 in.)
including front grille
Mass Approx. 1.3 kg (2 lb 14 oz) each
SA-WMS445 (subwoofer)
Speaker system Active subwoofer,
magnetically shielded
Speaker unit Woofer: 20 cm (8 in.),
cone type
Enclosure type Advanced SAW type
Reproduction frequency range
26 Hz – 200 Hz
Continuous RMS power output
135 W (6 ohms 20 Hz – 20 kHz,
0.8% THD) (US, CND model)
120 W (6 ohms 20 Hz – 20 kHz,
0.8% THD) (AUS, SP, MY model)
SA-WMS445 SS-MS445 SS-MS445
(front and rear) (center)
SPECIFICATIONS
US Model
Canadian Model
E Model
Australian Model
Inputs
LINE IN (input pin jack)
SPEAKER IN (input terminals) (US, CND model)
Outputs (US, CND model)
SPEAKER OUT (output terminals)
General
Power requirements 120 V AC, 60 Hz (US, CND model)
220 – 240 V AC, 50/60 Hz (AUS model)
110 – 120/220 – 240 V AC, 50/60 Hz
(SP, MY model)
Power consumptions 90 W
1 W (standby mode)
Dimensions (w/h/d) Approx. 230 × 392 × 464 mm
(9 1/8 × 15 1/2 × 18 3/8 in.),
including front grille (US, CND model)
Approx. 230 × 392 × 447 mm
(9 1/8 × 15 1/2 × 17 5/8 in.),
including front grille (AUS, SP, MY model)
Mass Approx. 13.2 kg (29 lb 2 oz)
Supplied accessories
Foot pads (4 × 5)
Audio connecting cord (1)
Speaker connecting cords, 10 m (32.8 ft) (2)
Speaker connecting cords, 3.5 m (11.5 ft) (3)
Design and specifications are subject to change without
notice.
•Abbreviation
CND : Canadian model
AUS: Australian model
SP : Singapore model
MY : Malaysia model
9-877-090-02
2003D0400-1
© 2003. 04
MICRO SATELLITE SYSTEM
Sony Corporation
Home Audio Company
Published by Sony Engineering Corporation
1
SA-VE445H/WMS445/SS-MS445
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 leakag e. 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 v oltage drop across a resistor by means of a V OM
or battery-operated AC voltmeter. The “limit” indication is 0.75
V, so analog meters must have an accurate lo w-v oltage 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
1. DIAGRAMS
1-1. Circuit Boards Location (SA-WMS445) ............................ 3
1-2. Printed Wiring Boards (SA-WMS445) ............................... 5
1-3. Schematic Diagram (SA-WMS445) ................................... 6
2. EXPLODED VIEWS
2-1. Front Panel Section (SA-WMS445).................................... 7
2-2. Rear Panel Section (SA-WMS445)..................................... 8
2-3. Front, Center, and Surround Speakers Section
(SS-MS445) ......................................................................... 9
3. ELECTRICAL PARTS LIST ........................................ 10
To Exposed Metal
Parts on Set
0.15µF
1.5k
Ω
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 P ARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
LES COMPOSANTS IDENTIFIÉS P AR 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.
À LA SÉCURITÉ!!
2
SECTION 1
d
DIAGRAMS
1-1. CIRCUIT BOARDS LOCATION (SA-WMS445)
AUTO POWER board
LED board
POWER SWITCH board
SA-VE445H/WMS445/SS-MS445
POWER board
MAIN boar
CONTROL board
3
SA-VE445H/WMS445/SS-MS445
Ver 1.1
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.
•Voltage is dc with respect to ground under no-signal
(detuned) condition.
•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.
AUS: Australian model.
SP : Singapore model.
MY : Malaysia model.
Note on Printed Wiring Boards:
• X : parts extracted from the component side.
• : Pattern from the side which enables seeing.
•Abbreviation
CND : Canadian model.
AUS: Australian model.
SP : Singapore model.
MY : Malaysia 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.
• Semiconductor
Location
Ref. No. Location
D101 C-3
D102 C-4
D103 B-3
D104 B-3
D201 I-4
D202 H-4
D303 E-3
D304 E-3
D305 F-6
D306 E-8
D501 C-8
D502 E-8
D503 E-8
D504 E-8
D505 E-8
D506 F-7
D507 E-7
D601 I-7
D602 I-7
D603 J-7
D604 J-7
D605 H-7
D606 H-7
D607 J-9
D608 H-8
D701 B-5
D702 C-5
D703 C-5
D704 C-5
D801 F-13
IC101 C-3
IC102 C-2
IC104 C-5
IC201 H-3
IC202 H-1
IC203 H-3
IC204 H-4
IC701 B-6
Q101 C-1
Q301 E-3
Q302 E-2
Q303 E-2
Q304 D-2
Q305 D-3
Q306 D-3
Q307 D-3
Q308 E-7
Q309 F-6
Q310 E-6
Q311 E-6
Q401 J-3
Q402 J-3
Q403 J-2
Q404 J-5
Q501 F-7
Q502 E-7
Q601 H-7
Q602 G-7
Q701 B-6
Q702 C-6
Q703 B-7
Q704 B-7
Q705 A-7
4
1-2. PRINTED WIRING BOARDS (SA-WMS445) • Refer to page 3 for Circuit Boards Location.
SA-VE445H/WMS445/SS-MS445
Ver 1.1
A
B
C
D
E
F
G
H
J
1
(CHASSIS)
R301
C301
R302
R121
C109
R120
R123
R126
1
CN101
5
C111
LINE
Q101
R125
JW29
J101
IN
C512
C511
JW30
234567891011121314
TM101
JW1
R122
148
C303
JW46
R303
C108
5
IC102
JW20
C308
R113
R124
R305
JW47
C104
C105
R119
R309
JW48
R304
C304
Q302
R316
R114
R115
C107
R118
JW21
US, CND
MODEL
C305
Q303
R117
R111
Q304
R308
R312
R109
C106
R116
Q305
JW32
R307
JW53
C102
148
JW6
JW7
R310
C306
D304
Q301
R101
5
D104
IC101
R110
JW8
US, CND MODEL
R314
C307
D303
R311
R306
R315
SPEAKERLR
IN
OUT
R702
JW3
C516
R103
R104
C103
Q306
D103
R136
Q307
C310
R313
C101
D101
C309
R105
D102
JW33
R318
R106
R108
C117
JW22
R317
JW49
CN302
SPEAKER
R102
R107
R137
R320
R319
21
BLK
RED
–
SP1
C116
R140
R139
JW34
+
R138
C514
JW35
C311
1
CN301
6
JW2
JW9
148
5
IC104
JW23
C513
JW24
RY301
R141
R341
D701
C118
C701
R703
R701
148
Q701
JW10
JW12
JW11
Q702
D704
D703
D702
JW36
CN502
14
C315
R335
D305
AUTO OFF
S701
R705
5
IC701
JW13
JW37
JW25
JW50
Q310
Q309 Q311
POWER
R707
C515
JW38
C317
S701
SAVE
R709
JW26
JW39
R340 R339
R704
JW27
JW40
C510
C509
R711
R706
JW41
MAIN BOARD
R338
Q308
R337
Q502
D507
Q501
JW54
Q703
C504
C503
C508
D506
C507
R708
Q704
JW42
C316
R504
Q705
R502
JW51
C506
C505
R503
D306
JW52
R501
R710
D505
D503
D501
R336
C502
~~
C501
D504
D502
JW4
JW5
JW16
JW17
JW18
JW14
JW19
JW15
JW28
JW43
JW44
JW45
T501
CN701
31
(CHASSIS)
POWER SWITCH BOARD
13
13
CN901
CN902
CN1
1
2
POWER
1-680-787-
CN501
13
1-680-784-
C1
11
(11)
LED BOARD
D801
S1
11
(11)
ON/STANDBY
13
CN801
1-680-788-
11
(11)
CONTROL BOARD
C206
C207
R206
14
IC202
85
R208
C204
R205
I
C203
R203
S201
MODE
MUSIC
MOVIE
S201
C205
R207
JW62
JW63
R204
Q403
C202
1
JW61
R201
JW64
R406
JW55
CN201
C201
R202
14
IC201
85
C208
RV201
LEVEL
C211 C212
5
R221
JW57
C213
JW59
C214
JW60
C209
R220
14
IC203
8
5
R211
R210
R209
R215
D202
C210
R219
14
IC204
85
JW58
R217
R212
D201
R213
R214
1-680-785-
R216
R218
11
(11)
POWER BOARD
CN401
61
R404
Q402
Q401
JW56
C401
R403
R405
R401
R402
R407
Q404
1-680-786-
11
(11)
Q602
C602
D601
R602
D602
C606
Q601
D605
D604
D603
41
D606
C604
C603
R601
C601
4
JW606
5
6
AUTO POWER BOARD
CN605
C605
T601
SP, MY MODEL
C4
D608
JW609
RY602
CNT2
2
3
1
US, CND, AUS MODEL
C3
JW608
RY601
12 3
S601
VOLTAGE
SELECTOR
JW601
JW602
D607
65 4
JW605
JW600
F601
CN604
3
1
JW604
SP, MY
MODEL
C5
CNT1
F602
C2
CN601
1
2
CN602
2
1
1-680-789-
AC IN
11
(11)
55
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