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Sony ICF-SW77 Service Manual

Sony ICF-SW77
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CF-SW77
SERVICE
MANUAL
US
Model
Canadian
Model
AEP
Model
UK
Model
E
Model
Australian
Mode!
SPECIFICATIONS
Circuit
system
Frequency
range
FM:
Single
conversion
superheterodyne
AM:
Dual
conversion
superheterodyne
Type
Frequency
coveraae
FM*
LW
MW
sw
1
2
3
4
76.0-108MHz
87.5-108MHz
87.5-108MHz
87.5-108MHz
150-
150-
150-285kHz
150-285kHz
531
531-1,602kHz
29,999.9kHz
29,999.9kHz
26,100kHz
3,850-26,100kHz
*Stereo
reception
when
using
stereo
earphones
Type
1:
Countries
that
are
not
listed
below
Type
2:
Germany,
Austria,
and
Scandinavian
countries
Type
3:
Saudi
Arabia
Type
4:
Italy
Intermediate
frequency
FM:10.7MHz
LW/MW/SW:
55.845MHz
(first)
455kHz
(second)
Antennas
FM/SW:
Telescopic
antenna
MW/LW:
Built-in
ferrite
bar
antenna
Speaker
Approx.
125
x
77
mm
(5
x
3
in.)
QQ
Power
output
400
mW
(at
10
%
harmonic
distortion)
Outputs
Recording
output
jack
(stereo
minijack)
Output
level
138
mV
(-15
dB)
Output
impedance
less
than
10
kilohm
Earphone
jack
(stereo
minijack)
MICROFILM
Power
requirements
6
V
DC
Four
R14
(size
C)
batteries
DC
IN
6
V
jack
accepts:
supplied
AC
power
adaptor
(except
for
Australian
model)
Where
purchased
AC
power
adaptor
Operating
voltage
US
model
AC-E604
120
VAC,
60
Hz
Canadian
model
AC-E602
110-120
V/
220-120
V
AC,
adjust¬
able,
50/
60
Hz
UK
model
AC-E603
240
V
AC,
50
Hz
AEP,
E
Australian
model
AC-E600
110-120
V/
220-120
V
AC,
adjust¬
able,
50/
60
Hz
DCC-E160L
car
battery
cord
(not
supplied)
for
use
with
12
V
car
battery
Approx.
20
hours
(FM
reception)
Approx.
12
hours
(AM
reception)
of
listening
for
fours
hours
a
day
at
a
normal
volume,
using
Sony
SUM-2(NS)
batteries.
Continued
on
next
page
-
LW/MW/SW/FM
STEREO
SYNTHESIZED
RECEIVER
Battery
life
PLL

Other manuals for Sony ICF-SW77

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Sony ICF-SW77 Specifications

Signal Circuitry IconSignal Circuitry
FM signal circuitrySuperheterodyne
AM signal circuitryDual Conversion Superheterodyne
Frequency Range IconFrequency Range
FM frequency range76.5-108 MHz
LW/MW/SW frequency range150-29999 kHz
Antenna System IconAntenna System
LW/AM antennaBuilt-in Ferrite Bar Antenna
SW/FM antennaTelescoping Antenna
External antenna inputYes
Outputs IconOutputs
Stereo headphone outputStereo Mini jack
Recording outputMini jack
Speaker size4" (10cm)
Power Requirements IconPower Requirements
DC power requirement6V
Battery typeC Batteries x 4 (optional)
AC power requirement120V, 60Hz with AC Adaptor, supplied
Battery Life IconBattery Life
FM reception battery life45 hours
AM reception battery life32 hours
Dimensions and Weight IconDimensions and Weight
Dimensions (WHD)10 [7]⁄8" x 6 [13]⁄16" x 1 [13]⁄16" (276 x 172.5 x 46.5mm)
Weight with batteries3 lbs 4 oz (1.48kg)

Summary

SPECIFICATIONS

Circuit system

Details the superheterodyne circuits used for FM and AM reception.

Frequency range

Lists frequency coverage for different models and types of reception.

Intermediate frequency

Specifies the IF frequencies for FM and AM bands.

Antennas

Describes the types of antennas used for FM/SW and MW/LW.

Power requirements

Outlines power sources and AC adaptor specifications.

Battery life

Provides estimates for battery operational duration.

Features

Preset Station Tuning

Explains tuning stations via preset memory.

Direct tuning

Details tuning by directly inputting frequencies.

Manual tuning

Describes tuning using the dial.

Scan tuning

Explains automatic station searching.

Other features

Lists additional functionalities like clock and timer.

SERVICING NOTES

Notes on Repairing Microcomputer Board

Instructions for repairing the microcomputer board.

Microcomputer Board Checking

Procedures for testing the microcomputer board.

LCD 802 Replacing Procedure

Step-by-step guide for replacing the LCD.

Points of the Frequency Coverage

Explains how frequency coverage is adjusted via soldering.

GENERAL

Location and Function of Controls

Identifies and explains all controls on the unit.

Power Sources

Details battery, AC adapter, and car battery power options.

Setting the Clock

Guide on setting local and UTC time.

Tips for Better Reception

Advice for improving radio signal reception.

Preset Station Tuning

How to tune stations using preset memory.

Direct Tuning

How to tune stations by direct frequency input.

Manual Tuning

How to tune stations using the dial.

Scan Tuning

How to scan for stations automatically.

Memorizing and Editing Stations

Steps to save and manage station presets.

Sleep Timer Operation

How to use the automatic shut-off timer.

How to Set the Timer

Guide for programming timer functions.

External Antenna Connection

Instructions for connecting external antennas.

Recording a Broadcast

How to record radio programs to a tape recorder.

ELECTRICAL ADJUSTMENTS

Main VCO Frequency Adjustment

Procedure for adjusting the main VCO frequency.

Sub VCO Freerun Frequency Adjustment

Procedure for adjusting the sub VCO freerun frequency.

X501 (6.275 MHz) X'tal Adjustment

Procedure for adjusting the crystal oscillator.

AM 1st IF Adjustment

Procedure for adjusting the AM first IF stage.

AM 455kHz IF Adjustment

Procedure for adjusting the AM 455kHz IF stage.

DIAGRAMS

IC Pin Function

Details pin functions for IC801.

Block Diagram

Provides a high-level block diagram of the unit.

Microcomputer Section

Details the microcomputer section.

Printed Wiring Boards

Shows printed wiring board layouts.

Microcomputer Section Schematic Diagram

Schematic for the microcomputer section.

Signal Section Schematic Diagram

Schematic for the signal section.

Signal Section Printed Wiring Boards

Printed wiring boards for the signal section.

EXPLODED VIEWS

ELECTRICAL PARTS LIST

Time Difference and World Time

How to use the world time scale

Guide on using the world map for time checks.

Reception Tips and Controls

Tips for Better Reception

Advice for improving radio signal reception.

Key Protection

Explains how to lock the controls.

Preset Station Tuning Procedures

How to Tune in by Selecting a Preset Station Name

Guide to tuning using saved station names.

To receive a preset station on a Tuning Page

Steps to select stations from Tuning Pages.

To receive a preset station on a Quick Page

Steps to select stations from Quick Pages.

To receive a preset station on the Timer Page

How to Select a Preset Frequency under a single Station Name

Direct Tuning Procedures

How to Tune In a Station Directly

Step-by-step guide for direct frequency tuning.

To Improve Receiving Conditions

Tips for adjusting antenna for better reception.

Manual Tuning Procedures

How to Tune In a Station Manually

Step-by-step guide for manual tuning.

To change the selectivity

Adjusting WIDE/NARROW settings.

To activate the synchronous detection

Instructions for using synchronous detection.

To activate the SSB (Single Side Band) mode

Instructions for SSB reception.

What is synchronous detection?

Explanation of synchronous detection benefits.

Scan Tuning Operations

How to Scan the Stations

Steps for automatic station scanning.

Memorizing and Editing Stations

How to make a Station Name

To Memorize a Station on the Quick Page

Erasing Stations and Frequencies

How to Erase a Frequency or a Station

Steps to delete saved stations or frequencies.

Adding Frequencies to Stations

How to Add a Frequency

How to add multiple frequencies to a station.

Sleep Timer Functions

Sleep Timer Operation

How to use the automatic shut-off timer.

Auto tune

How to use auto-tune with station presets.

Timer Programming

How to Set the Timer

Guide for programming timer functions.

To cancel the timer

How to cancel timer reservations.

Timer Program Priority and Interaction

About the priority of the timer programs

Explains timer program priority.

To use the sleep timer after setting the timer programs

How sleep timer interacts with regular timers.

External Antenna Connection Guide

How to Use the Supplied SW Compact Antenna

Guide for using the SW compact antenna.

How to Use an External Antenna (Not Supplied)

Guide for connecting external antennas.

Recording Broadcasts

For LW/MW/SW Reception

Methods for connecting antennas for LW/MW/SW.

To start recording at the desired time

How to record using a timer with a cassette recorder.

ELECTRICAL ADJUSTMENTS

Main VCO Frequency Adjustment

Procedure for adjusting the main VCO frequency.

Sub VCO Freerun Frequency Adjustment

Procedure for adjusting the sub VCO freerun frequency.

X501 (6.275 MHz) X'tal Adjustment

AM 1st IF Adjustment

AM 455kHz IF Adjustment

FM IF Adjustment

AM Tracking Adjustment

SYNC USB/LSB ZERO-BEAT Adjustment

FM Tracking Adjustment

FM Stereo Adjustment

FM Scan Stop Adjustment

Clock Frequency Adjustment (Microcomputer board)

Adjustment Location

DIAGRAMS

IC Pin Function

Details pin functions for IC801.

Block Diagram

Provides a high-level block diagram of the unit.

Microcomputer Section

Details the microcomputer section.

Printed Wiring Boards

Microcomputer Section Schematic Diagram

Signal Section Schematic Diagram

Signal Section Printed Wiring Boards

IC802(SUB MICRO COMPUTER) Details

IC802 Pin Function Details

Semiconductor Lead Layouts

IC Block Diagrams

Cabinet Section Exploded View

Chassis Section Exploded View

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