ICF-704S - Sony Audio Service Manual (repair manual)

icf-704s service manual
Model
ICF-704S
Pages
18
Size
622.11 KB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
icf-704s.pdf
Date

Read Sony ICF-704S Service Manual 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
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.
2
mark
Center
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.
mark
mark
• white/white only
CF2
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.
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.
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
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
3
ICF-704S
SECTION 1
GENERAL
This section is extracted
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
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)
1
Connect the AC power cord (supplied) to
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
adjust the length and angle for the
best reception.
SW
:
Extend the telescopic antenna
vertically.
AM(MW)/LW
: Rotate the unit horizontally for
optimum reception. A ferrite bar
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.
Telescopic antenna
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)
Carrying handle
Poigné de transport
Tragegriff
Asa de transporte
Maniglia di trasporto
v
AM (MW)/LW
AM (PO)/GO
FM
UKW
SW
OC
KW
AC IN
Band
Gamme
Wellenbereich
Banda
Banda
TUNE indicator
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
4
ICF-704S
SECTION 2
DISASSEMBLY
Note : This set can be disassemble according to the following sequence.
2-1.
CABINET (FRONT) ASSY
(Page 5)
SET
2-2.
CHASSIS SECTION
(Page 5)
2-3.
MAIN BOARD
(Page 6)
2-4.
SETTING THE POINTER
(Page 6)
Page of 18
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Download Sony ICF-704S Service Manual (Repair Manual)

Here you can read online and download Sony ICF-704S Service Manual in PDF. ICF-704S service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony ICF-704S Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.