Sony CDP-307ESD - Page 3

MODEL IDENTIFICATION
—
Specification Labels
—
SAFETY
CHECK-OUT
r
SONY®
MODEL
NO.
]
COMPACT
DISC
PLAYER
SERIAL NO.
MADE IN JAPAN
V
US,
Canadian
model:
AC: 120V 60Hz
13W
AEP model:
AC: 220V~50/60Hz
13W
E model: AC:
110,
120,
220,
240V~50/60Hz
13W
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.
1
. A commercial leakage
tester,
such
as the
Simpson
229
or
RCA WT-540A.
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 2 V
AC range
are
suitable. (See
Fig.
A)
To
Exposed Metal
Parts
on
Set
0.1
5pF
AC
voltmeter
(0.7
SV)
Fig.
A. Using an
AC
voltmeter to check AC
leakage.