Sony CDP-101 - US Model Safety Check-Out; AC Leakage Test Procedure

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| CDP-101
ly
DHHS Protective Housing
Label..... (US model)
DNHW Protective Housing
Labe/..... (Canadian model)
Laser Radiation Sign
Label..... (Canadian model)
Aperture Label
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SAFETY CHECK-OUT (US Model)
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)
| 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 0.5mA (500 microampers). Leakage
current can be measured by any one of three
To Exposed Metal
Parts on Set
|
methods.
t : AC
i
1.
A
commercial
leakage
tester,
such
as
the
0.15
pF
1.5k2.
valenater
Simpson
229
or
RCA
WT-5S40A.
Follow
the
manufacturers’
instructions
to
use
these
instru-
:
:
ments.
2.
<A
battery-operated
AC
milliammeter.
The
Data
Earth
Ground
oe a ‘| Precision 245 digital multimeter is suitable for
| Rect Fig. A. Using an AC voltmeter to check AC leakage.
| this job.
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