Sony icf c 303 service manual

Page 1

ICF-C303

SERVICE- MANUAL

US Model
Canadian Model
AEP Model

E Model
Austral/an Model

SPECIFICATIONS

US,CND, E92 model

FM: 87.5-108MHZ

AM: 530-1,710kHz

EXCEPT US, CND, E92 model

FM: 87.5-108MHZ

AM: 531-1,602kHz

US, CND, E92 model

FM: OrlMHz (fixed)

AM: 10kHz (fixed)

EXCEPT US, CND, 592 model

FM: 0,05MHz (fixed)

AM: 9kHz (fixed)

The frequency display is raised or lowered by

steps of 0,1MHZ. (Example: Frequency

88.05MH2 is displayed as 88rOMHz.)

FM: FM wire antenna

AM: Built»in ferrite bar antenna

Speaker Approx. 6.6cm (2Va inches) dia.

Power output 200mW (at 10% harmonic distortion)

Power requirements US, CND, E92 model: 120V AC. 60H:

AUS model: 240V Ac, 50H2 _

IT, AEC, AEZ, E91 model: 220-230V
AC, 50Hz

Frequency range

Scan step

Antennas

Dimensions Approx 201x61r5><156mm (w/h/d)
(8X 2/2 X6/. inches)
incl, projecting parts and controls
, Weight Approx 7005 (12oz)

Accessory supplied FM antenna coupler(1) (Netherlands, Denmar»

k, Sweden, Finland, Norway and Austria only)
Design and specifications subject to change without notice

Note
This appliance conforms with EEC Directive 87/308/EEC regarding
interference suppression.

FEATURES

' Dual alarm FMIAM PLL (phase locked loop) synthesized clock radio.

0 Choice oi radio alarm or buzzer alarm tor both ALARM fl and E].

. You can wake up by two different stations on ALARM and E.

~ You can cancel the alarm lor selected days of the week, using the
ALARM CANCEL button,

0 REPEAT ALARM/DATE bar (DREAM BAR DATE/SNOOZE for the
North and South America model) oflersyoutoenloy notonlythe snooze
alarm function butalso enablesyou to checkthe month. day. and day
of the week.

0 Choice at four durations tor sleep timer: 90, 60, 30. or 15 minutes.

. You can preset 7 FM/AM stations tor easier tuningl

~ LCD display with backlight.

- Sell power backup:

Thebuiltvin capacitorenables theunit to keep thememorized time and
lrequency (or six hours without battery,

ICND: Canadian model

0 IT: Italian model

DAUSI Australian model

OAEC: North European model

0 E92: Central and South America model

DUAL ALARM FM/AM P|.|.
CLUBK RADIO

SONY:

SYNTHESIZ'

Page 2

ICF-C303

SAFETY CH ECK-OUT

After correcting the original service problem,
perform the following safety check before releasing
the set to the customer:

Check the antenna terminals, metal trim, metallized
knobs, screws, and all other exposed metal parts for
AC leakage. Check leakage as described below.

LEAK AG E TEST

The AC leakage from any exposed metal part to
earth ground and from all exposed metal parts to any
exposed metal part having a return to chassis, must
not exceed 0.5 mA (500 microampers). Leakage
current can be measured by any one of three
methods.

I. A commercial leakage tester, such as the
Simpson 229 or RCA WT-54OA. Follow the
manufacturers instructions to use these instru-
ments.

2. A battery-operated AC milliammeter. The Data
Precision 245 digital multimeter is suitable for
this job.

3. Measuring the voltage drop across a resistor by
means of a VOM or battery-operated AC volt-
meter. The limit indication is 0.75 V, so
analog meters must have an accurate low-
Voltage scale. The Simpson 250 and Sanwa
SH-63Trd are examples of a passive VOM that
is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are
suitable. (See Fig. A)

To Exposed Metal
Parts on Set

/ AC
voltmeter
(0. 75 VI

0.15uF

Iélfikll
L, T

1? Earth Ground

Fig. A. Using an AC voltmeter to check AC leakage.

MODEL IDENTIFICATION
-Specification Label-

SONL

FM/AM 2 BANDS

WWW

MODEL N0. ICF-CSOB

US, CND, E92 model: AC: 120V 60Hz 3w
AUS model: AC: 240V~50Hz 3W
AEC, AEZ, IT, E91 model: AC: 220-230V~50Hz 3W

OCND: Canadian model

OIT: Italian rmdel

oAUS: Australian model

OAEC: North European model

0 E92: Central and South America model

SAFETY-RELATED COMPONENT WARNINGI!

COMPONENTS IDENTIFIED BY MARK A OR DOTTED
LINE WITH MARK A 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 PUB-
LISHED BY SONY.

ATTENTION AU composmr AVANT RAPPORT
A LA sécumren

Les COMPOSANTS IDENTIFIES PAR UNE MARoue A
sun Les DIAGRAMMES SCHEMATIOUES er LA LISTE
DES PIECES sour cnmoues PouR LA sécumre
DE FONCTIONNEMENT. NE REMPLACER ces com.
POSANTS oue PAR DES PIECES sonv oo~r LES
NUMéRos som DONNES DANS ce MANUEL ou
DANS LES SUPPLEMENTS PUBLIES PAR souv.