Sony SA-WMS145, SA-WMSP50 Service Manual

1

•SA-WMS145 are the subwoofer
section in SA-VE145.

•SA-WMSP50 are the subwoofer
section in SA-VE2M, HT-SL50/SL55.

Ver 1.0 2003. 05

SERVICE MANUAL

AEP Model

UK Model

SA-WMS145/WMSP50

E Model

SA-WMSP50

Speaker system Active subwoofer, magnetically shielded
Speaker unit Woofer: 20 cm, cone type
Enclosure type Advanced SAW type
Amplifire section
Continuous RMS power output

100 W (6 ohms, 20 - 250 Hz, 0.8% THD)

Reproduction frequency range

28 Hz - 200 Hz

High frequency cut-off frequency

150 Hz

Inputs

INPUT (input pin jack)

General

Power requirements 230 V AC, 50/60 Hz
Power consumptions 100 W
Dimensions (w/h/d) Approx. 270 × 325 × 398 mm, including

front grille

Mass Approx. 10 kg

Design and specifications are subject to change without notice.

SPECIFICATIONS

Sony Corporation

Home Audio Company
Published by Sony Engineering Corporation

9-877-360-01

2003E04-1
© 2003. 05

ACTIVE SUBWOOFER

photo: SA-WMS145

SA-WMS145/WMSP50

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SA-WMS145/WMSP50

TABLE OF CONTENTS

1. DIAGRAMS

1-1. Circuit Boards Location ...................................................... 3

1-2. Printed Wiring Boards ......................................................... 5

1-3. Schematic Diagram ............................................................. 6

2. EXPLODED VIEWS

2-1. Front Section ....................................................................... 7

2-2. Rear Section ........................................................................ 8

3. ELECTRICAL PARTS LIST........................................... 9

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.

3

SA-WMS145/WMSP50

1-1. CIRCUIT BOARDS LOCATION

SECTION 1

DIAGRAMS

CONTROL board

LED board

INPUT board

MAIN board

POWER TRANS boar

d

SWITCH board

4

SA-WMS145/WMSP50

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/

4

W or less unless otherwise

specified.

• 2 : nonflammable resistor.

• C : panel designation.

• 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

Note on Printed Wiring Boards:

• X : parts extracted from the component side.

• : Pattern from the side which enables seeing.

Note: The components identified by mark 0 or dotted line

with mark 0 are critical for safety.
Replace only with part number specified.

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

• Semiconductor
Location