Sony icf c 103 service manual

Page 2

lCF-CIO3

SAFETY CHECK-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.

LEAKAGE 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. Measuringthe 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 2 V AC range are
suitable. (See Fig, A)

To Exposed Metal
Parts on Set

0 15uF Ig 1 5k!)

'.___l

'4? Earth Ground

A C
voltmeter
(0. 75 VI

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

SAFETY-RELATED COMPONENT WARNING! I

COMPONENTS IDENTIFIED BV MARK & 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.

Section Title

SECTION 1, GENERAL ....... . ............ . .......................

TABLE OF CONTENTS

SECTION 2. ELECTRICAL ADJUSTMENTS 8

SECTION 3. PIN DESCRIPTION-m- ------------- ........ 9

SECTION 4. DIAG RAMS

4-1. Primed Wiring Board
4-2. Schematic Diagam

11
' 13
.. .................................. .......... 15

[C Block Diagram

4.3 Semiconductor Lead Layouts ....................................... 16
SECTION 5. EXPLODED VIEWS iiiiiiiiiiiiiiiiiiiiiiiiiiiiiii 17
SECTION 5. ELECTRICAL PARTS LIST ~~~~~~~~~~~~~~~~~~~~~ 18

MODEL IDENTIFICATION

- Model Number Portion -

SONY;

FM/AM 2BANDS
//////// //////

MODEL NO, ICF-CIOS

US, Canadian model: AC : 120V ~ 60H: 3W
AEP, Italian, E model : AC :220-230V ~ SOHz 3W
Australian model : AC :240V ~ SOHz 3W

ATTENTION AUCOMPOSANT AYANT RAPPORT
A LA SECURITE!

LES COMPOSANTS IDENTIFIEs PAR UNE MAROUE A
sun LEs DIAGRAMMES SCHEMATICUES ET LA LISTE
DEs PIECES soNT CRITIQUES POUR LA SECURITE
DE PONCTIoNNEMENT. NE REMPLACER CES coM-
POSANTS CUE PAR DES PIECES SONY DONT LES
NUMERos SONT DoNNEs DANS CE MANUEL ou
DANS LES SUPPLEMENTS PUBLIES PAR soNv.