Heathkit SW-7800 - Initial Tests

Heathkit
INITIAL
TESTS
In
this
section
of
the
Manual,
you
will
perform
cer-
tain
tests
to
verify
that
your
Receiver
operates
prop-
erly.
If
you
do
not
obtain
the
correct
results
in
any
of the
following
tests,
refer
to
the
“Possible
Cause
of
Trouble”
column,
or
the
“In
Case
of Difficulty”
section
on
Page
111,
and
correct
the
problem
before
you
continue.
PRIMARY
WIRING
TESTS
CAUTION:
Do
NOT
connect
the
line
cord
plug
of
your
Receiver
to
an
AC
outlet
until
you
are
in-
structed
to
do
so.
IMPORTANT:
A
wiring
error
in
the
primary
wiring
circuit
(line
cord,
power
switch,
etc.)
of
your
kit
could
cause
you
to
receive
a
severe
electrical
shock
‘These
“Primary
Wiring
Tests”
will
help
you
elimi-
nate
such
wiring
errors
that
may
exist,
Refer
to
Pictorial
6-1
(Illustration
Booklet,
Page
35)
for the
locations
of
the
“test points”
called out
in
Be
sure
the line
cord
plug
is
not
connected
toan
AC
outlet
(.
)_-Be-Zure
the
Power
switch
(on
the
VOLUME
control)
is
off
(turned
fully
counterclockwise)
NOTES:
1,
If
you
do
not
have
an
ohmmeter,
carefully
check
the
line
cord,
switch
SW3,
and trans-
former
wiring
against
the
wiring
shown
in
Pictorial
2-7
(Illustration
Booklet,
Page
8).
Make
sure
there
are
no
fine
strands
of
wire
or
solder
globs
touching
adjacent
terminals
on
the
chassis.
2.
Ifyou
have
an
ohmmeter,
perform
the
follow-
ing
resistance
measurements.
You
will
be
in~
structed
to
connect
one
of
the
ohmmeter
leads
to
ground.
You
may
use
the
GROUND
post
on
the
rear
panel
for
this.
(.)
Tur
on
your
ohmmeter
and
allow
it
to warm
up,
if
necessary,
(_)
Set
the
ohmmeterto
the
R
x
10k
range.