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Heathkit Manuals
Measuring Instruments
HD-1250
Manual
Heathkit HD-1250 Manual page 21
Solid-state dip meter
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Table of Contents
Troubleshooting
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Table of Contents
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Page 19
Turn
the
oscillator circuit
board
foil-side-up
and position
it
as
shown.
Apply
a
thin layer
of solder to the
two
corners
of
the
circuit
board
as
shown.
(
)
Cut
two
1"
lengths of
wire
braid.
Apply
a
small
amount
of solder
to
both ends
of
both
braid lengths.
(
)
Position
one
1"
length of braid
1/8"
onto
corner
A
of the
circuit
board.
Heat the
foil
and
the braid
until
the
solder melts.
Remove
the heat
from
the
connection.
NOTE:
Hold
the
braid
with
pliers
to avoid
burning
(
)
In
the
same
manner,
mount
and
position
the other
1"
wire
braid at
corner
B on
the board.
Be
sure
you do
not
make
a
solder bridge to
other
foils.
THIN
SOLDER
1"
BRAID
PICTORIAL
2-3
CONTINUE
<3>
CIRCUIT
BOARD CHECKOUT
Carefully inspect the
circuit
board
for
the
ollowing
conditions:
)
Unsoldered connections
)
"Cold"
solder
connections.
)
Solder bridges
between
foil
patterns.
)
Protruding
leads
which
could touch
together.
)
Transistor for the
proper type
and
installation.
FINISH
Set
the
circuit
board
aside temporarily.
1
1/8
3/B
I
3/8
7/8
I
.
|
I
'l
'
'
I
I
0
6
1
(CM)
2
3*5
-f '
1
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Table of Contents
Troubleshooting
In case of difficulty
60
Troubleshooting Chart
62
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