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Heathkit SB-1000 - Page 21

Heathkit SB-1000
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Heathkit
Page
21
STEP-BY-STEP
ASSEMBLY
Refer
to
Pictorial
3-1
while
you
perform
the
following
steps.
©
Position
the
circuit
board
as
shown
in
the
Pictorial.
NOTE:
Be
sure
to
install
of
the
parts
on
the
component
side
(not
the
foil
side)
of
this
circuit
board.
Q
R102:47
kQ,
1/2-watt
(yel-viol-org)
resistor.
©
D102:
1N4149
diode
(#56-56).
Be
sure
to
match
the
band
on
the
diode
with
the
outline
of
the
band
on
the
circuit
board.
Q
D101:
1N4149
diode
(#56-56).
()
C104:
.01
pF
(103)
axial-lead
ceramic
capacitor.
()
C105:
.01
\tF
(103)
axial-lead
ceramic
capacitor.
()
D103:
1N4149
diode
(#56-56).
()
D104:
1N4149
diode
(#56-56).
()
R101:
180.Q,
1/2-watt
(brn-gry-bm)
resistor.
()
R103:
180
Q,
1/2-watt
(brn-gry-bm)
resistor.
()
Solder
the
leads
to
the
foil
and
cut
off
the
excess
lead
lengths.
Refer
to
Pictorial
3-2
while
you
perform
the
follow-
ing
steps.
(
C101:10
pF
ceramic
capacitor.
()
C102:
10
pF
ceramic
capacitor.
©
C103:
150
pF
(151)
mica
capacitor.
()
C106:
27
pF
(270)
mica
capacitor.
()
C107:
150
pF
(151)
mica
capacitor.
{)
Solder
the
leads
to
the
foil
and
cut
off
the
excess
lead
lengths.
ancHesy
2
©
Prepare
the
following
solid
wires.
NOTE:
The
wires
are
listed
in
the
order
in
which
you
will
use
them.
2"
orange
6"
grey
ovonage
Iredk
spe.
2"
blue
NOTE:
Solder
one
end
of
the
following
wires
to
the
foil
as
you
connect
them.
The
other
ends
of
these
wires
will
be
connected
later.
()
Connect
one
end
of
the
2"
orange
solid
wire
to
hole
A.
{)
Connect
one
end
of
the
6"
gray
solid
wire
to
hole
B.
{)
Connect
one
end
of
the
2"
blue
solid
wire
to
hole
C.
CIRCUIT
BOARD
CHECKOUT
Carefully
inspect
the
foil
side
of
the
circuit
board
for
the
following
most-commonly-made
errors.
()
Unsoldered
connections.
Poor
solder
connections.
()
Solder
bridges
between
foil
patterns.
If
you
wish,
you
can
check
your
foil
pattern
against
the
one
shown
in
the
"X-Ray
Views"
beginning
on
Illustration
Booklet
Page
67.
(Check
each
diode
to
make
sure
it
is
correctly
installed.
This
completes
the
assembly
of
the
ALC/powcr
circuit
board.
Set
it
aside
until
it
is
called
for
in
a
step.

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