Icom ic-751a Instruction Manual page 49

NORMALR
fl
NORMAL
l| |l
REVERSE*
"reverse
(1)
FL-52A, FL-53A
INSTALLATION
(2)
FL-63A
INSTALLATION
(3)
FL-70
INSTALLATION
S3 S4
o
G e
W97
-o W98
—
©
W99
S3: Reverses the IN and
OUT
positions of the
FILTER SWITCH
when
using the
AM
mode.
S4: Reverses the IN and
OUT
positions of the
FILTER^ SWITCH
when
using the
CW
or
RTTY
mode.
These
are
455kHz
filters
for use with the
CW NARROW
or
RTTY
NARROW
mode.
No
special tools are required to
successfully
complete
the
installa-
tion of these
filters. Install
them
at
position [F]
in
the photo.
1
)
First,
remove
the
top
cover.
2) Insert
the optional
FL-52A
or
FL-53A
Into position
[F] as
shown
in
the photo.
3)
Check
the operation of the
filter
using the
FILTER COMBINA-
TIONS
TABLE
for
a
guide.
If
necessary,
refer
to
SECTION
6
-
4
CW
OPERATION
for
instructions
on
how
to
select
the
CW
NARROW
and
RTTY
NARROW
modes.
This
is
a
9MHz
narrow
filter
for
the
CW
or
RTTY
mode. The
filter
replaces the standard
FL-32A
which
is
supplied with the IC-751A.
Install
this
filter at
[A]
position.
1
)
Remove
the top
cover,
then the
1
1
screws
from
the
MAIN
unit.
2) Lift
the
right
edge of the
MAIN
unit
upwards
taking care not
to
damage
the sockets and
plugs that are
installed
on
the
unit.
3)
The
filter
must
be
installed at position
[A]
in
the photo,
there-
fore
remove
the
FL-32A
original
filter
from
the
MAIN
unit using
de-soldering braid.
4) Install
the
FL-63A
at position [A]
.
Orient the
label
on
the
filter
in
the
same manner
as
the other
filters
already
installed.
5)
Bend
the
leads
and mounting
tabs flush against the opposite
side
of the printed
circuit board,
and
solder.
Trim
the ends of the
leads with diagonal
cutters.
6)
Replace
the
MAIN
unit
and
screws,
and the top
cover.
There
are
no adjustments
required
after installation
is
completed.
This
is
a
9MHz
wide
filter
for
SSB
which
may
be
installed in
one
of
two
ways:
a)
To
replace the standard FL-80 with
the
FL-70.
b)
To
replace the standard
FL-32A
with the FL-70.
a:
Use
the
FL-63A
installation
method
given previously. Place the
FL-70
in
the
position
where
the
FL-80
is
now
installed.
b: 1)
Use
the
FL-63A
installation
method
given previously.
Place
the
FL-70
in
the
position
where
the
FL-32A
is
now
installed.
2)
The FL-70
operates only on
CW
or
RTTY
if it is
installed
in
the
FL-32A
location.
Therefore, perform
the following modification so the FL-70'
may
or
may
not be used
as
desired.
45
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