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Heathkit SB-401 - Page 5

Heathkit SB-401
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Page
88
[eed
se
areesr]
HEATHEIT
IMPORTANT:
The
word
"Diode"
in
the
NOTES];
column
of
the
following
chart
indicates
that
a
diode
is in
the
circuit
under
test,
Therefore,
the
measured
resistance
can
vary
due
to
the
forward];
Connect
the
common
test
lead
of
an
ohmmeter
to
the
chassis
and
make
the
checks
listed
in
the
following
chart,
Refer
to
Figure
1-1
(fold-out
from
Page
86)
for
location
of
test
points,
current
of
the
diode,
and
depending
on
the
range
setting
of
the
ohmmeter,
The
ohmmeter
readings
in
the
chart
were
made
with
a
VIVM,
Readings
made
with
a
VOM
will
be
considerably
different
than
those
listed,
TEST
POINT
RESISTANCE
NOTES
Terminal
strip
J
Lugs
1
and
2
2
2,
Remove
tubes
V10
and
V11;
the
reading
should
increase
to
.8
2,
Remove
pilot
lamp
TW;
reading
should
increase
to
1
2,
Lug
3
0
&
(ground),
Lug
4
Infinity,
Lug
5
Infinity.
Terminal
strip
H
Lugs
1,
2,
4,
and
5
At
least
10
KQ,
(Diode)
Lug
3
0
Q
(ground).
Terminal
strip
AC
Lug
1
At
least
10
KQ
after
10
seconds,
(Diode)
Lug
2
At
least
15
KQ
after
10
seconds,
(Diode)
Lug
3
0
&
(ground),
Lug
4
At
least
10
KQ
after
10
seconds,
(Diode)
Lug
5
At
least
15
KQ
after
10
seconds,
(Diode)
Terminal
strip
AD
Lug
2
At
least
10
KQ
after
10
seconds,
(Diode)
Lug
3
0
&
(ground),
Lug
4
32,
Lug
5
Approximately
600
Q
or
higher,
(Diode)

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