SA-WX900
SERVICE MANUAL
SPECIFICATIONS
US Model
Canadian Model
AEP Model
UK Model
9-961-097-03
2005G02-1
© 2005.07
Sony Corporation
Home Audio Group
Published by Sony Engineering Corporation
ACTIVE SUBWOOFER
Ver. 1.2 2005.07
AUDIO POWER SPECIFICATIONS
For the U.S.A. model
POWER OUTPUT AND TOTAL HARMONIC
DISTORTION:
With 4 ohm loads, from 20 200 Hz; rated 800 watts, minimum RMS
power, with no more than 0.8 % total harmonic distortion from 250
milliwatts to rated output.
System
Type
Active Subwoofer, magnetically shielded (closed cabinet)
Speaker units
Woofer : 30 cm dia. (12 in.), cone type x 2
Continuous RMS output
North American model
(4 ohms/100Hz, 0.8%) : 1,000 W
European model (DIN 4 ohms/100Hz, 0.8%) : 1,000 W
Reproduction frequency range
20 Hz 200 Hz
High frequency cut-off frequency
50 Hz 200 Hz
Phase selector
NORMAL, REVERSE
Mode selector
MOVIE, MUSIC
BASS-BOOST OFF, 1, 2
Inputs
Input jacks
LINE IN: input pin jack
SPEAKER IN: input terminals
Output jacks
LINE OUT: output pin jack
SPEAKER OUT: output terminals
General
Power requirements
North American model : 120 V AC, 60 Hz
European model : 220 240 V AC, 50 Hz
Other models : 220 240 V AC, 50 Hz
Power consumption
220 W
less than 0.5 W (Standby mode)
Dimensions
Approx. 440 x 550 x 620 mm
(17 3/8 x 21 7/8 x 24 1/2 in.) (w/h/d)
Mass
48 kg (105lb 14oz)
Supplied accessories
Audio connecting cord
(1 phono plug 1 phono plug) (1)
Speaker cords (2)
Spike
Design and specifications are subject to change without notice.
2
SA-WX900
Specifications ........................................................................... 1
1. GENERAL ...................................................................... 3
2. DIAGRAMS
2-1. Circuit Boards Location ............................................. 4
2-2. Schematic Diagram Filter Section ........................ 5
2-3. Printed Wiring Board Filter Section ..................... 6
2-4. Schematic Diagram Power Section ...................... 7
2-5. Printed Wiring Board Power Section .................... 8
3. EXPLODED VIEWS
3-1. Amp Section ............................................................... 9
3-2. Cabinet Section ......................................................... 10
4. ELECTRICAL PARTS LIST .................................... 11
TABLE OF CONTENTS
SAFETY CHECK-OUT
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)
Fig. A. Using an AC voltmeter to check AC leakage.
0.15µF
To Exposed Metal
Parts on Set
1.5k
AC
voltmeter
(0.75V)
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 PUB-
LISHED 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.
3
SA-WX900
SECTION 1
GENERAL
This section is extracted from
instruction manual.
· Location of controls
LEVEL
PHASE
CUT OFF
FREQUENCY
NORM
PHASE
MODE
CUT OFF FREQUENCY
LEVEL
OFF
POWER SAVE
BOOST
REVERSE
200Hz
50Hz
MAX
MIN
AUTO
MUSIC
MOVIE
OFF
1
2
POWER
SAVE
BOOST
MODE
POWER
POWER indicator
ON/STANDBY
POWER
4
SA-WX900
SECTION 2
DIAGRAMS
For Schematic Diagrams.
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 and
1/4 W or less unless otherwise specified.
· C : panel designation.
THIS NOTE IS COMMON FOR SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
· 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 M).
Voltage variations may be noted due to normal production tolerances.
· Signal path.
F
: AUDIO
· Abbreviation
CND : Canadian model
Note:
The components identi-
fied by mark 0 or dotted
line with mark 0 are criti-
cal for safety.
Replace only with part
number 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
For printed wiring boards.
Note:
· X : parts extracted from the component side.
·
: Pattern from the side which enables seeing.
· Abbreviation
CND : Canadian model
FILTER board
CONTROL board
SWITCH board
INPUT board
PROTECT board
AUTO POWER board
POWER SW board
ICE250-SW
SWITCHING
REGULATOR
LINE FILTER board
5
5
SA-WX900
2-2. SCHEMATIC DIAGRAM FILTER SECTION
IC203(1/2)
IC205(1/2)
IC205(2/2)
C237
C238
C235
C236
CN202
C240
C239
Q204
Q203
R248
R247
R244
C220
R246
R245
D203
D202
R249
D201
R242
C219
R240
R241
R256
IC207
R232
R231
D204
R255
R254
C223
R253
R251
R250
C222
C221
R252
CN201
CN101
R201
R202
R203
C201
R204
R205
R208
R207
R206
C202
IC203(2/2)
R220
C211
R210
C209
R223
C210
R221
R222
Q202
R224
C203
IC201(2/2)
R110
C103
D101
D102
C101
D104
D103
R109
C102
R108
R104
R103
R102
R107
R105
R106
R101
TM101
L101
R112
C105
D106
C104
R114
C106
C110
C108
C111 C109
D105
CN204
CN301
R218
C206
Q201
C207
R216
R217
R219
R214
R215
R213
C208
C204
R211
C205
R209
R225
C212
C214
R226
C215
C213
R234
R229
C218
C216
R233
C241
C242
C232
C230
C231 C234
D205
CN206
CN302
R301
R302
CN205
CN401
R403
R404
R402
R401
R230
IC202(1/2)
IC201(1/2)
IC206(1/2)
IC206(2/2)
IC101(1/2)
IC202(2/2)
SW302
SW301
SW303
SW304
RV401
RV402
CN203
R111
IC101(2/2)
J101
C243
IC204(2/2)
IC204(1/2)
KIA4558P
KIA4558P
KIA4558P
0.1
0.1
10
50V
10
50V
XH5P
0.1
0.1
KTC3199
KTA1267
47k
47k
100k
10
50V
10k
10k
1SS133
1SS133
22k
1SS133
150
0.0015
10k
10k
12k
BU4066
47k
47k
1SS133
47k
47k
10
50V
4.7k
22k
15k
0.01
0.01
33k
5P
10k
10k
6.8k
100p
10k
10k
10k
47k
47k
10
50V
KIA4558P
6.8k
0.001
10
1
1k
1
680
100k
KTC3199
10k
10
50V
KIA4558P
2.2k
220p
1SS133
1SS133
220p
1SS133
1SS133
2.2k
220p
22k
47k
47k
4.7k
1/2W
22k
22k
22k
4.7k
1/2W
1k
10
50V
1SS133
220p
100k
47p
0.1
10
50V
0.1
10
50V
1SS133
5P
5P
1k
0.47
KTC3199
0.47
1k
68k
10k
3.3k
10
4.7k
0.001
1
10k
1
10k
4.7k
0.18
0.15
5.6k
0.68
0.33
2.2k
1k
0.001
0.022
15k
0.1
0.1
0.1
10
50V
10
50V
0.1
7
1SS133
4P
4P
22k
22k
7P
7P
47k
47k
2.2k
2.2k
47k
KIA4558P
BUFFER
KIA4558P
BA4558
BPF
BA4558
BA4558
KIA4558P
20kB
20kB
4P
1k
BA4558
0.1
KIA4558P
KIA4558P
L
-
+
R
-
+
L
-
+
R
-
+
OUT
IN
OUT
IN
LINE
SPEAKER
7
Ver 1.1