Sony ICF-704S Service Manual ▷ View online
1
Ver 1.1 2009. 03
Sony Corporation
Audio&Video Business Group
Published by Sony Techno Create Corporation
9-877-784-02
2009C00-1
© 2009. 03
SERVICE MANUAL
Australian Model
ICF-704S
FM/SW/MW 3 BAND RADIO
SPECIFICATIONS
Frequency range:
Band
ICF-704S
FM
87.5 - 108.0 MHz
SW
5.95 - 18 MHz
MW
530 - 1605 kHz
Speaker:
Approx. 10.2 cm (4
1/8
inches) dia. 8 ohms
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
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.
notice.
2
mark
Center
Frequency
Frequency
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
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.
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.
mark
mark
• white/white only
CF2
CF3
CF3
CF4
mark
mark
CF3
CF2
CF4
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.
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
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
ICF-704S
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
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
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
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
5-2. Cabinet (Rear) Section ........................................................ 14
6. ELECTRICAL PARTS LIST
......................................... 15
3
ICF-704S
SECTION 1
GENERAL
This section is extracted
from instruction manual.
from instruction manual.
2
1
3
4
TU
NI
NG
VO
L
MIN
MAX
TO
NE
LOW
HIGH
A
B
C
OPERATE
(
(
$
ON/
4
STANDBY)
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.
R6 (size AA) battery
×
4
pile R6 (format AA)
×
4
Mignonzelle (R6/AA)
×
4
pila R6 (tamaño AA)
×
4
Pila R6 (formato AA)
×
4
Choosing Power
Sources
Installing the batteries
(See Fig. A)
1
1
Open the lid of the battery
compartment.
compartment.
2
Install four R6 (sizeAA) batteries (not
supplied) with correct polarity.
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.
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.
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.
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.
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.
battery leakage and corrosion.
House Current (See Fig. B)
1
1
Connect the AC power cord (supplied) to
the
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
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.
The speaker is deactivated when an earphone is
connected.
Improving the
Reception
(See Fig. C)
FM
:
Extend the telescopic antenna and
adjust the length and angle for the
best reception.
adjust the length and angle for the
best reception.
SW
:
Extend the telescopic antenna
vertically.
vertically.
AM(MW)/LW
: Rotate the unit horizontally for
optimum reception. A ferrite bar
antenna is built into the unit.
antenna is built into the unit.
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.
antenna by holding the bottom of
it. The antenna can be damaged
when you move the antenna with
excessive force.
Telescopic antenna
Antenne télescopique
Teleskopantenne
Antena telescópica
Antenna telescopica
Antenne télescopique
Teleskopantenne
Antena telescópica
Antenna telescopica
AC power cord (supplied)
Cordon d’alimentation secteur
Netzkabel (mitgeliefert)
Cable de alimentación de ca (suministrado)
Cavo di alimentazione CA (in dotazione)
Cordon d’alimentation secteur
Netzkabel (mitgeliefert)
Cable de alimentación de ca (suministrado)
Cavo di alimentazione CA (in dotazione)
Carrying handle
Poigné de transport
Tragegriff
Asa de transporte
Maniglia di trasporto
Poigné de transport
Tragegriff
Asa de transporte
Maniglia di trasporto
v
AM (MW)/LW
AM (PO)/GO
AM (PO)/GO
FM
UKW
UKW
SW
OC
KW
OC
KW
AC IN
Band
Gamme
Wellenbereich
Banda
Banda
Gamme
Wellenbereich
Banda
Banda
TUNE indicator
Indicateur TUNE
TUNE-Anzeige
Indicador de sintonia (TUNE)
Indicatore TUNE
Indicateur TUNE
TUNE-Anzeige
Indicador de sintonia (TUNE)
Indicatore TUNE
To a wall outlet
Vers une prise murale
An eine Netzsteckdose
A la toma de pared
Alla presa di rete
Vers une prise murale
An eine Netzsteckdose
A la toma de pared
Alla presa di rete
4
ICF-704S
SECTION 2
DISASSEMBLY
Note : This set can be disassemble according to the following sequence.
2-1.
CABINET (FRONT) ASSY
(Page 5)
(Page 5)
SET
2-2.
CHASSIS SECTION
(Page 5)
(Page 5)
2-3.
MAIN BOARD
(Page 6)
(Page 6)
2-4.
SETTING THE POINTER
(Page 6)
(Page 6)