EasyManua.ls Logo

Heathkit IG-4505 - Page 42

Heathkit IG-4505
54 pages
Save Page as PDF
Print Icon
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Loading...
Page
42
<——
Re
HEATHEIT®
Test
#1
Cont'd.
Is
there
a
100
kHz
signal
at
pin
12
of
1C3?
Check
IC3
and
the
associated
circuitry.
YES
Is
there
a
10
kHz
signal
at
pin
12
of
1C4?
Check
IC4
and
the
associated
circuitry.
-
YES
Is
there
a
1
kHz
signal
at
pin
12
of
1C5?
Check
IC5
and
the
associated
circuitry.
YES
Is
there
a
100
Hz
signal
at
pin
12
of
1C6?
Check
IC6
and
the
associated
circuitry.
YES
Is
there
a
10
Hz
signal
at
pin
12
of
(C7?
Check
!C7
and
the
associated
circuitry.
YES
Does
the
signal
at
lug
9
of
the
TIME
OUT
switch
(SW1)
indicate
the
frequency
of
the
switch
position
(from
1
MHz
to
10
Hz)
as
the
switch
is
turned
to
each
of
its
positions?
Check
the
wiring
of
the
TIME
OUT
switch
(SW1).
YES
Do
the
same
signals
appear
at
the
bases
(B)
of
both
03
and
Q4?
,
Check
the
wiring
of
the
TIME
OUT
switch
(SW1).
YES
The
oscillator
and
scaler
circuits
are
working
properly.
YES
Continued
on
Page
43

Related product manuals