Sony CDP-497 - Model Identification and Specifications; Safety Check-out Procedures

CDP-497
MODEL
IDENTIFICATION
—
SPECIFICATION
LABEL
—
SONY® MODEL NO.
CDP-497
COMPACT
DISC
PLAYER
SERIAL
NO.
MADE IN
JAPAN
US,
Canadian MODEL AC:120V
60Hz 12W
AEP MODEL
AC:220-230V~
50/60Hz
Australian
MODEL:
AC;240V~
50/60HZ
E MODEL
AC:1
10-120,
220-240V~
50/eOHz
12W
SONY®
MODEL NO. CDP-497
COMPACT
DISC
PLAYER
V////////////77?7/
SERIAL NO.
MADE
IN FRANCE
^
AEP MODEL
AC:220-230V~
50/60HZ
UK MODEL
AC:240V~ 50/60Hz
SAFETY
CHECK-OUT
After correcting the
original
service problem,
perform the
following
safty 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
part
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 0.75V,
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)
To Exposed Metal
Parts
on
Set
AC
voltmeter
(0.75V)
0.15
fiF
^
1.5 kQ
—
Earth Ground
Fig.
A. Using an
AC voltmeter
to check
AC leakege.
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