Sony sms 3 service manual

Page 1

SMS-3

SERVICE MANUAL EMoae/

SONY

Photo: For Right Channel

SPECIFICATIONS
Type 2 way acoustic suspension
Speaker units Woofer: 20 cm (8 inches)
cone type
Tweeter: 3 cm (1 V4 inches)
dome type
Nominal impedance 6 ohms
Rated input power 100 W
Maximum output power 300 W
Sensitivity 90 dBNV/m
Frequency range 50 HZ - 28,000 Hz
Crossover frequency 2000 Hz
Speaker terminal Screw lype large terminal

(allowable for connection of the
speaker cords equipped with
banana plugs)
Enclosure bulk 125 lit.
Dimensions 238 X 382 X 221 mm (w/h/d)
(93/a x 15]a x 83/ inches)
(not including front grille)
Weight Approx. 10 kg (22 lb 7 oz) (1)
Anti-magnetism design
Supplied accessories Logo seals for horizontal
placement (2)
Front grilles (2)
Cushions (8)
Hexagon wrench (1)
Optional accessories Speaker unit for replacement
SMS-BWU (Woofer)
SMS-BTU (Tweeter)

Design and specifications are subject to change without
notice

STUDIO MIINITIIR SPEAKER SYSTEM

SONY®

Page 2

SMS-3

1. NOTE ON REPAIR

0 The arrangement of the parts making network are 0 Be careful about handling the following parts.
precisely adjusted in the cause of having a bad effect i) When applying an intense heat to C2 or 04
on the sound quality. polypropylene film capacitor, melting tin foil
i) Direction of coils. (top and bottom, left and right, causes short-circuit.

beginning and end of turning.) ii) C1 metalized paper capacitor short-circuit when
ii) Position of coils. an lead wire contacts its aluminium case.
iii) Direction and position of capacitors. (o marked: 0 The network board is fixed on the rear panel. When
Means letter head side.) repairing, remove the woofer and repair through its
iv) Mounting order of terminals. hole on the front panel.

0 Be careful about it reffering to the following frame
wiring.

2. FRAME WIRING

Note: Please refer to the list of the exploded View on page 4

for the part codes and part name of No.11 to 15 in the
. blue
followmg figure ( ______________________ \ @ side
I
1 L2 blue/white
/ _____________
15 l I : \ SP2
l I I | tweeter
13 - I II : CI 0
II
1' red/while
._ _____________ __ \
_ _ _ Te? _______
in u, input,
side 95' e
l
14 I
be innin SP1
of filming L1 1 woofer
O (-454) end of
- -/ turning
c ~ network
board
Mount L1 the end of turning
side on the network board.
0 Terminals mounting order 69 e
to 03 g. g
(0 C4 1:}=: to L2
to 02
to L1 -:= =I I: to C1
=D- to SP1, SP2
(3 side
- input
terminal

_2_

(black)