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ICF-C303
|
After
correcting
the
original
service
problem,
perform the following safety check before releasing
SONY:
the set to the customer:
Check the antenna terminals, metal trim, "metallized"
FM/AM 2 BANDS
knobs, screws,
and all other exposed metal parts for
Yu"
db
0:0:0::=t-;
AC leakage.
Check leakage as described below.
MODEL NO. ICF-C303
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
0.5mA
(500 microampers).
Leakage
US, CND, E92 model: AC: 120V 60Hz 3W
current
can
be
measured
by
any
one
of
three
AUS models AG
tN
o0kz aw
aay
AEC, AEZ, IT, E91 model: AC: 220—230V~50Hz 3W
methods.
1.
A
commercial
leakage
tester,
such
as
the
@CND: Canadian model
Simpson 229 or RCA WT-540A.
Follow the
elT:
Italian model
fac
ere
ti
t
th
act
eAUS:
Australian model
manufacturers'
instructions
to use
these instru-
@AEC™
North European migdel
ments.
@E92:
Central and South America model
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 0.75V,
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)
SAFETY-RELATED
COMPONENT
WARNING!!
COMPONENTS IDENTIFIED BY MARK /\ OR DOTTED
LINE WITH MARK A\ ON THE SCHEMATIC DIAGRAMS
Fa Exposed cul
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
Pecan set
OPERATION.
REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.
AC
ATTENTION
AU COMPOSANT
AYANT
RAPPORT
al
erate
A LA SECURITE!
LES COMPOSANTS
IDENTIFIES PAR UNE MARQUE /\
SUR LES DIAGRAMMES SCHEMATIQUES ET LA LISTE
DES
PIECES SONT
CRITIQUES
POUR
LA SECURITE
DE
FONCTIONNEMENT.
NE REMPLACER
CES COM.
POSANTS
QUE
PAR
DES
PIECES SONY
DONT
LES
NUMEROS
SONT
DONNES
DANS
CE
MANUEL
OU
DANS LES SUPPLEMENTS PUBLIES PAR SONY.
=
Earth Ground
Using an AC voltmeter to check AC leakage.
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