Sony SA-WX90 Service Manual
SA-WX90
p
SERVICE MANUAL
SPECIFICATIONS
System
Type Active Subwoofer (magnetically shielded design)
Speaker unit
Woofer: 30 cm dia., cone type
Continuous RMS output
European model (DIN) (0.7%): 300 W
Other models (50 Hz) (0.8%): 250 W
Reproduction frequency range
20 Hz - 120 Hz
High frequency cut-off frequency
50 Hz - 120 Hz
Phase selector
NORMAL, REVERSE
AEP Model
UK Model
E Model
General
Power requirements
European model: 220 - 230 V AC, 50/60 Hz
Other models: 220 - 240 V AC, 50/60 Hz
Power consumption
European model: 125 W
Other models: 110 W
Dimensions
Approx. 420 x 450 x 540 mm (w/h/d)
Mass 36 kg
Supplied accessories
Audio connecting cord
(1 phono plug - 1 phono plug) (1)
Speaker cords (2)
Inputs
Input jacks
Output jacks
LINE IN: input pin jack
SPEAKER IN: input terminals
LINE OUT: output pin jack
SPEAKER OUT: out
ut terminals
Design and specifications are subject to change without
notice.
ACTIVE SUBWOOFER
1
TABLE OF CONTENTS
1. GENERAL............................................................................ 3
2. DIAGRAMS
2-1. Note for Printed Wiring Board and Schematic Diagram ...... 3
2-2. Printed Wiring Board ............................................................ 4
2-3. Schematic Diagram ............................................................... 5
3. EXPLODED VIEW
3-1. Cabinet Section ..................................................................... 6
4. ELECTRICAL PARTS LIST .......................................... 6
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 MANU AL OR IN SUPPLEMENTS PUBLISHED BY SONY.
2
SECTION 1
GENERAL
SECTION 2
DIAGRAMS
• Location of controls
– Front View (a part) –
POWER POWER indicator
– Upper View (a part) –
LEVEL
MIN MAX
LEVEL PHASE
PHASE
REVERSENORMAL
CUT OFF FREQ
50Hz
120Hz
CUT OFF FREQ
2-1. NOTE FOR PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM
Note on Printed Wiring Board:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• b : Pattern from the side which enables seeing.
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.
• 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.
• U : B+ Line.
• V : B– Line.
• Voltages are dc with respect to ground under no-signal
conditions.
no mark : Power on
: Impossible to measure
∗
• Voltages are tak en with a V OM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production tolerances.
• Signal path.
F : AUDIO
• Abbreviation
G : German model
MY : Malaysia model
SP : Singapore model
4
W or less unless otherwise
– Rear View (a part) –
LINE
IN OUT
SPEAKER
IN OUT
L
R
POWER SAVE
AUTO
OFF
L
R
LINE OUT
LINE IN
SPEAKER OUT
SPEAKER IN
POWER SAVE
• Circuit Boards Location
POWER SW CE board
(not supplied)
MAIN board
CONTROL board
(not supplied)
POWER SUPPLY board
(not supplied)
TRANS (SEC) board
(not supplied)
TRANS (PRI) board
(not supplied)
33
POWER (IC) board
(not supplied)
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