Icom IC-751A Service Manual page 137

FL-80 and FL-44A can be selected by placing the
[FILTER] SWITCH in the OUT position. The
bandwidth will then be 2.3kHz.
(4) FL-33 INSTALLATION
$4
$3 1C3
o— —-o——— 97
@——_©-— — —0 W98
° o——_-9 W999
This is a 9MHz filter for AM mode. FL-33 replaces FL-32A
and requires the relocation of jumper wires.
1) Use the FL-63A installation method given previously.
Install FL-33 where FL-32A is now installed.
2) Change the jumper wires as shown in the diagram above.
3) This installation causes FL-33 to be selected whether the
[FILTER] SWITCH is in the IN or OUT position when
using AM mode. Only 455kHz filters will be changed by
the [FILTER] SWITCH.
11-2 OPTIONAL IC-PS35 INTERNAL
POWER SUPPLY
© INSTALLATION
Refer to diagrams at right.
1) Turn the transceiver upside down. Remove PLATE (A)
attached to the rear panel by unscrewing the four screws.
These screws will be used later.
2) Attach the IC-PS35 INTERNAL POWER SUPPLY to the
bottom cover with the supplied screws and insulating
washers. Also insert the insulating gasket between the
IC-PS35 and the bottom cover.
3) The IC-PS35 comes with an AC POWER SOCKET
PLATE.
Pass the DC power cable attached to P1 through the hole
on the AC POWER SOCKET PLATE then insert the
bushing into the hole.
Exchange the AC POWER SOCKET PLATE at the PLATE
(A) position using the screws which previously held
PLATE (A). The AC POWER SOCKET should be near the
bottom of the transceiver.
4) Pass the P2' connector from the AC POWER SOCKET
unit to the inner chassis through the hole in the rear
chassis. Connect P2' with the P2 connector from the
IC-PS35.
5) Position the cables in the rear chassis. This prevents
magnetic coupling between the cables and the VCO coil
cores.
6) Replace the top and bottom covers of the transceiver.
Plug P1 from the IC-PS35 into the DC POWER SOCKET
on the transceiver.
7) Connect the supplied AC power cable into the newly
installed AC POWER SOCKET on the rear panel of the
1C-751A. Connect the AC power plug into an AC power
outlet.
8) Push the IC-751A [POWER] SWITCH to apply power to
the transceiver.
INSULATOR
AC POWER
SOCKET PLATE
~——— DC POWER
SOCKET
1—2