1
SAFETY
PRECAUTION
V.
3.
Design
Alteration
Warning
-
Do
nof
alter
or
add
to
the
mechanical
or
electrical
design
of
this
Equipment.
De
sign
alterations
and
additions,
including,
but
not
limited
to,
circuit
modifications
and
the
addition
of
items
such
as
auxiliary
audio
and/or
video
output
connections,
might
alter
the
safety
characteristics
of
this
receiver
and
create
a
hazard
to
the
user.
Any
design
alterations
or
additions
will
void
the
manufacturer’s
warranty
and
will
make
you,
the
servicer,
responsible
for
personal
injury
or
property
damage
resulting
therefrom.
6.
Observe
original
lead
dress.
Take
extra
care
to
assure
correct
lead
dress
in
the
following
areas:
a.
near
sharp
edges,
b.
near
thermally
hot
parts
-
be
sure
that
leads
and
components
do
not
touch
thermally
hot
parts,
c.
the
AC
supply,
d.
high
voltage,
and
e.
antenna
wiring.
Always
inspect
in
all
areas
for
pinched,
out-of-place,
or
frayed
wiring.
Do
not
change
spacing
between
compo
nents,
and
between
components
and
the
printed-circuit
board.
Check
AC
power
cord
for
damage.
7.
Components,
parts,
and/or
wiring
that
appear
to
have
overheated
or
are
otherwise
damaged
should
be
re
placed
with
components,
parts,
or
wiring
that
meet
original
specifications.
Additionally,
determine
the
cause
of
overheating
and/or
damage
and,
if
neces
sary,
take
corrective
action
to
remove
any
potential
safety
hazard.
4.
Picture
Tube
Implosion
Protection
Warning
-
The
picture
tube
in
this
receiver
employs
integral
implosion
protection.
For
continued
implosion
protection,
re
place
the
picture
tube
only
with
one
of
the
same
type
number.
Do
not
remove,
install,
or
otherwise
handle
the
picture
tube
in
any
manner
without
first
putting
on
shatterproof
goggles
equipped
with
side
shields.
People
not
so
equipped
must
be
kept
safely
away
while
picture
tubes
are
handled.
Keep
the
picture
tube
away
from
your
body.
Do
not
handle
the
picture
tube
by
its
neck.
Some
’’in-line”
picture
tubes
are
equipped
with
a
per
manently
attached
deflection
yoke;
because
of
poten
tial
hazard,
do
not
try
to
remove
such
"permanently
attached”
yokes
from
the
picture
tube.
il
k
8.
PRODUCT
SAFETY
NOTICE
-
Many
TV
electrical
and
mechanical
parts
have
special
safety-related
charac
teristics
some
of
which
are
often
not
evident
from
visual
inspection,
nor
can
the
protection
they
give
necessarily
be
obtained
by
replacing
them
with
com
ponents
rated
for
higher
voltage,
wattage
etc.
Parts
that
have
special
safety
characteristics
are
identified
in
this
service
data
by
shading
with
mark
on
sche
matics
and
by
shading
or
a
A\
mark
in
the
parts
list.
Use
of
a
substitute
replacement
part
that
does
not
have
the
same
safety
characteristics
as
the
recom
mended
replacement
part
in
this
service
data
parts
list
might
create
shock,
fire,
and/or
other
hazards.
i/!
m
5.
Hot
Chassis
Warning
-
a.
Some
Equipment
chassis
are
electrically
connected
directly
to
one
conductor
of
the
AC
power
cord
and
may
be
safely
serviced
without
an
isolation
transformer
only
if
the
AC
power
plug
is
inserted
so
that
the
chassis
is
connected
to
the
ground
side
of
the
AC
power
source.
To
confirm
that
the
AC
power
plug
is
inserted
correctly,
with
an
AC
voltmeter
measure
between
the
chassis
and
a
known
earth
ground.
If
a
voltage
reading
in
excess
of
1.0V
is
obtained,
remove
and
reinsert
the
AC
power
plug
in
the
opposite
polarity
and
again
measure
the
voltage
potential
be
tween
the
chassis
and
a
known
earth
ground.
b.
Some
Equipment
chassis
normally
have
85V
AC
(RMS),
be
tween
chassis
and
earth
ground
regardless
of
the
AC
plug
polarity.
These
chassis
can
be
safely
serviced
only
with
an
isolation
transformer
inserted
in
the
power
line
between
the
receiver
and
the
AC
power
source,
for
both
personnel
and
test
equipment
protection,
c.
Some
Equipment
chassis
have
a
secondary
ground
system
in
addition
to
the
main
chassis
ground.
This
secondary
ground
system
is
not
isolated
from
the
AC
power
line.
The
two
ground
systems
are
electrically
separated
by
insulating
material
that
must
not
be
defeated
or
al
tered.
R51
II-
m
:(«•
m
3
1^'
Summary of Contents for PG-2740
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