Icom IC-751A - 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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