Sony ICF-704-S Service manual
ICF-704S
SERVICE MANUAL
Ver 1.0 2004. 04
SPECIFICATIONS
Frequency range:
Band ICF-704S
FM 87.5 - 108.0 MHz
SW 5.95 - 18 MHz
MW 530 - 1605 kHz
Australian Model
Speaker:
Approx. 10.2 cm (4
Power output:
450 mW (at 10 % harmonic distortion)
Output:
v (earphone) (ø 3.5 mm minijack)
Power requirements:
230 V AC, 50 Hz
6V DC, four R6 (size AA) batteries
Dimensions:
Approx. 282.5 × 153.5 × 83.5 mm (w/h/d)
(11 1/8 × 6 1/8 × 3 3/8 inches) incl. projecting parts
and control with carrying handle pushed in.
Mass:
Approx. 1211 g (2 lb 10.7 oz) incl. batteries
Supplied accessory:
AC power cord (1)
Design and specifications are subject to change without
notice.
1/8 inches) dia. 8 ohms
9-877-784-01
2004D04-1
© 2004. 04
FM/SW/MW 3 BAND RADIO
Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation
1
ICF-704S
HOW TO CHANGE THE CERAMIC FILTERS
This model is used two ceramic filters of CF2, CF3 and CF4.
You must use same type of color marked ceramic filters in order to
meet same specifications.
Therefore, the ceramic filter must change two pieces together since
it’s supply two pieces in one package as a spare parts.
markmark
CF4
• white/white only
mark mark
CF4
CF2
CF3
CF2
CF3
mark
red 10.70 MHz
blue 10.67 MHz
orange 10.73 MHz
black 10.64 MHz
white 10.76 MHz
white/white 10.75 MHz
yellow 10.79 MHz
Center
Frequency
TABLE OF CONTENTS
1. GENERAL............................................................................ 3
2. DISASSEMBLY
2-1. Cabinet (Front) Assy ............................................................. 5
2-2. Chassis Section ..................................................................... 5
2-3. Main Board ........................................................................... 6
2-4. Setting the Pointer ................................................................. 6
3. ELECTRICAL ADJUSTMENTS
MW Section ............................................................................. 7
SW Section .............................................................................. 7
FM Section .............................................................................. 8
4. DIAGRAMS
4-1. Note for Printed Wiring Boards and
Schematic Diagrams ............................................................. 9
4-2. Printed Wiring Board – Main Section – .............................. 10
4-3. Printed Wiring Boards – Power Section – ........................... 11
4-4. Schematic Diagram ............................................................. 12
5. EXPLODED VIEWS
5-1. Cabinet (Front) Section ....................................................... 13
5-2. Cabinet (Rear) Section ........................................................ 14
6. ELECTRICAL PARTS LIST......................................... 15
Notes on Chip Component Replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
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
PA RT NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
2
2
1
OPERATE
($ON/4STANDBY)
Band
Gamme
Wellenbereich
Banda
Banda
A
R6 (size AA) battery × 4
pile R6 (format AA) × 4
Mignonzelle (R6/AA) × 4
pila R6 (tamaño AA) × 4
Pila R6 (formato AA) × 4
B
v
C
TUNE indicator
Indicateur TUNE
TUNE-Anzeige
Indicador de sintonia (TUNE)
Indicatore TUNE
AC power cord (supplied)
AC IN
Cordon d’alimentation secteur
Netzkabel (mitgeliefert)
Cable de alimentación de ca (suministrado)
Cavo di alimentazione CA (in dotazione)
FM
UKW
SECTION 1
GENERAL
Telescopic antenna
Antenne télescopique
Teleskopantenne
Antena telescópica
Antenna telescopica
G
N
I
N
U
T
L
O
V
MIN MAX
E
N
O
T
LOW HIGH
4
3
Insert the # side of the battery first.
Insérez le côté # de la pile en premier.
Batterie mit der # Seite zuerst einlegen.
Inserte en primer lugar el lado # de las pilas
Inserire prima il lato # della pila.
Carrying handle
Poigné de transport
Tragegriff
Asa de transporte
Maniglia di trasporto
SW
OC
KW
To a wall outlet
Vers une prise murale
An eine Netzsteckdose
A la toma de pared
Alla presa di rete
AM (MW)/LW
AM (PO)/GO
ICF-704S
This section is extracted
from instruction manual.
Choosing Power
Sources
Installing the batteries
(See Fig. A)
1
Open the lid of the battery
compartment.
2
Install four R6 (sizeAA) batteries (not
supplied) with correct polarity.
3
Close the lid.
Note
When operating the unit on batteries, remove the AC
power cord from the AC IN jack. The unit cannot be
operated on batteries when the AC power cord is
connected to the AC IN jack.
Battery life (Approx. hours) (JEITA*)
When using FM SW AM(MW) LW
Sony alkaline 100 110 110 110
LR6 (size AA)
Sony R6 (size AA) 36 40 40 40
* Measured by JEITA (Japan Electronics and
Information Technology Industries Association)
Standards. The actual battery life may vary
depending on the circumstance of the unit.
Replacing batteries
When the sound becomes weak or distorted, replace
all the batteries with new ones.
Notes on batteries
• Do not charge the dry batteries.
• Do not carry the dry batteries with coins or other
metallic objects. It can generate heat if the positive
and negative terminals of the batteries are
accidentally contacted by a metallic object.
• Do not use different types of batteries at the same
time.
•When you replace the batteries, replace all with new
ones.
• When you are not going to use the unit for a long
time, remove the batteries to avoid damage from
battery leakage and corrosion.
House Current (See Fig. B)
Connect the AC power cord (supplied) to
1
the AC IN jack of the radio.
2
Plug into a wall outlet.
Note
Use only the supplied AC power cord.
Operating the
Radio
1
Press OPERATE ($) to turn on the
radio.
2
Select a desired band, and tune into a
station using TUNING.
TUNE (tuning) indicator lights up when a station
is tuned in.
3
Adjust the volume using VOL.
4
Adjust the tone to your preference using
TONE.
To obtain clear treble, turn to “HIGH”.
To reinforce bass, set to “LOW”.
•To turn off the radio, press OPERATE (4).
•To listen with an earphone connect the earphone
(not supplied) to the v (earphone) jack.
The speaker is deactivated when an earphone is
connected.
Improving the
Reception
(See Fig. C)
FM: Extend the telescopic antenna and
SW: Extend the telescopic antenna
AM(MW)/LW: Rotate the unit horizontally for
Note
Adjust the direction of the
antenna by holding the bottom of
it. The antenna can be damaged
when you move the antenna with
excessive force.
adjust the length and angle for the
best reception.
vertically.
optimum reception. A ferrite bar
antenna is built into the unit.
3
ICF-704S
SECTION 2
DISASSEMBLY
Note : This set can be disassemble according to the following sequence.
SET
2-1. CABINET (FRONT) ASSY
(Page 5)
2-2. CHASSIS SECTION
(Page 5)
2-3. MAIN BOARD
(Page 6)
2-4. SETTING THE POINTER
(Page 6)
4
Note : Follow the disassembly procedure in the numerical order given.
2-1. CABINET (FRONT) ASSY
5
(B2.6)
9
0
antenna contact plate
qa
CN1
two BV tapping
handle
screws
8
screw
(M3)
7
(B2.6)
6
(B2.6)
battery case lid
qs
cabinet (rear) assy
two BV tapping
two BV tapping
ICF-704S
screws
screws
qd
cabinet (front) assy
2-2. CHASSIS SECTION
1
Remove the two solderings.
claw
4
transparent cover
2
screw
(1.7)
3
two
screws
(1.7)
1
2
two BV tapping
(B2.6)
knob (TUNE)
screws
3
chassis section
5
ICF-704S
w
k
2-3. MAIN BOARD
5
claw
9
chassis assy
7
0
MAIN board
4
BV tapping
(B2.6)
scre
3
VC drum
2
(M2.6)
2-4. SETTING THE POINTER
• Setting the Pointer
1. Rotate the VC drum in the direction of the arrow until it is stopped.
2. Fit the rack on the projection of the chassis.
3. Fit the back plate on the bosses and attach the plate.
4. Install the pointer.
screw
8
6
claw
D2
two knobs (control)
1
boss
chassis
rac
back plate
pointer
VC drum
rack
boss
6
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