SAFETY
INSTRUCTIONS
SAFETY CHECK AFTER SERVICING
Confirm
the
specified insulation resistance between power cord plug prongs and externally exposed parts
of
the set is
greater than
10 M ohms,
but
for equipment with external antenna terminals (tuner, receiver, etc.) and
is,
intended for
[g
or
[A],
specified insulation resistance should be more than 2.2 Mohms (ground terminals, microphone jacks,
headphone jacks. line-in-out jacks etc.)
PRECAUTIONS
DURING
SERVICING
1.
Parts identified
by
the
.&.
symbol parts are critical for safety.
Replace only with parts number specified.
2.
In
addition
to
safety,
other
parts and assemblies are specified for conformance with such regulations
as
those
applying
to
spurious radiation. These must also
be
replaced only with specified replacements.
Examples:
RF converters,
tuner
units,
antenna
selector switches, RF cables, noise blocking capacitors, noise
blocking filters, etc.
3.
Use
specified internal wiring.
Note
especially:
l)
Wires covered with
PVC
tubing
2)
Double insulated wires
3)
High voltage leads
4.
Use
specified insulating materials for hazardous live parts. Note especially:
1)
Insulation Tape
2) PVC tubing
3) Spacers (Insulating Barriers)
4) Insulation sheets for transistors
5) Plastic screws for fixing microswitch (especially in turntable)
5. When replacing
AC
primary side components (transformers, power cords, noise blocking capacitors, etc.), wrap
ends
of
wires securely
about
the terminals before soldering.
6. Observe
that
wires do not contact
heat
producing parts (heatsinks, oxide metal film resistors, fusible resistors,
e1c
.).
7.
Check
that
replaced wires
do
not
contact
sharp edged
or
pointed
parts.
8.
Also check areas surrounding repaired locations.
9.
Use
care
that
foreign objects (screws, solder droplets, etc.)
do
not
remain inside
the
set.
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