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Heathkit IM-4180 - Page 4

Heathkit IM-4180
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a
n
“Calibr
scene
-
ZS
Eircuit
BoarD
g
PIN
‘Push
a
male
circuit
board
pin
onto
one
end
of
the
wire
as
shown.
Solder
the
connector
to
the
wire.
The
wire
will
be
used
for
tests
in
the
following
steps.
of
the
following
steps
in
this
section,
or
or
in
the
‘‘Alignment’’
sections,
when
a
jumper
wire
is
referred
to,
for
example,
a
‘blue
jumper
wire”
or
a
“red
jumper
wire,
”
it
means
should
locate
and
connect
one
of
the
jumper
sfw
SY
wires
(with
a
female
connector)
to
a
male
connector
pin
on
the
circuit
board.
Refer
to
Pictorials
5-2
and
5-3
(Illustration
Booklet,
Page
9)
for
the
following
steps
/
(\/)
Connect
the
male
pin
on
the
end
of
the
red
test
ae
CT
vA
4
no
at
OUADCD.
tha
exar
iector
on
the
end
of
ihe
Conneet
ne
Battery
oP
on
the
main
circuit
we
wm
oC
—-
eae
od
iD
a
we
the
|
small
plug
on
that
unit
into
Ji01
on
the
main
circuit
board.
Make
sure
the
AC
line
cord
is
plugged
into
an
AC
outlet.
u
have
installed
rechargeable
batteries,
set
al
uy
V102
al
CHARGE;
tne
switcn
position,
erwise,
must
be
set
to
NO
CHARGE.
RED
ON-OFF
switch
to
its
OFF
Hesiti
on
fout).
Check
the
position
of
the
meter
pointer.
If
the
pointer
is
not
exactly
over
the
scale
“0,”
the
mechanical
adjust
screw
(directly
under
the
center
of
the
meter)
until
it
is
one
pointer
width
below
“0.”
tare
Luill
{ )
On
the
main
circuit
board
connect
the
five
re-
maining
jumper
wires
as
follows:
Yellow
jumper
wire
to
NORM.
Orange
jumper
wire
to
NORM.
Blue
jumper
wire
to
NORM.
Violet
jumper
wire
to
NORM.
Red
jumper
wire
to
NORM.
NOTE:
In
the
fallo
owing
te
DWN
2
Ade
BAL
ALY
LEE
SAL
ay
i
i
Pe
desired
results,
push
the
ON.
OFF
PUSHBUTTON
to
OFF
(out)
and
refer
to
the
“In
Case
of
Difficulty”’
section
on
Page
51.
we
Set
the
front
panel
controls
as
follows:
Counierciockwise,
(V)
Touch
the
end
of
the
red
test
wire
to
me
15V
pin
nd
15.
Touch
the
red
test
wire
to
the
8V
pin
near
U108.
Check
the
meier
for
an
upscale
reading.
As
you
hald
the
wire
on
the
&V
pin,
adiust
8V
ADJ
control
R186
to
obtain
a
reading
of
approxi-
mately
7.5
on
the
lower
meter
scale.
—~
ed
Push
the
ON-OFF
switch
to
OFF.
SMALL
iNDENTATION
Rea
BOGE
Cag
DAL
ET
PRATT
ATT
PIN
1
Detail
5-3A
—
oe
S
y
Wee
U8
t
PIN
i
PIN
1
PIN
1
(Y
U107:
Refer
to
Detail
5-3A
and
identify
the
pin
1
end
of
the
TBA820L
(#442-610)
integrated
cirenit
Re
cuore
the
nins
are
straight
on
the
IC:
Wbiblstsstl,
DY
Geary
asa
pase
oF
faa
straight
ee
ee
then
match
the
pin
1
end
of
the
IC
with
the
index
mark
on
the
circuit
board
and
carefully
push
the
IC
into
socket
U107
as
shown.
A.

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