Icom IC-725 Instruction Manual page 27

MAINTENANCE
AND ADJUSTMENT
8
8-1
DISASSEMBLING
THE
TRANSCEIVER
Follow the
transceiver
disassembly procedures
shown
here
when
you want
to
install
an option or replace
a
component.
CAUTION:
DISCONNECT
the
DC
power
cable
from
the
transceiver
before performing
any
work
on
the
transceiver.
REMOVING COVERS
(Fig.
1)
REMOVING
PA UNIT SCREWS
(Fig. 2)
PREPARATION FOR OPENING THE PA
UNIT
AND
LOGIC UNIT
(Fig. 3)
r r
J—
I
n
OPENING THE PA
UNIT
(Fig. 4)
REMOVING THE
PA UNIT SHIELD
COVER
(Fig. 5)
1)
To
remove top and
bottom
covers,
unscrew the 16
screws
shown
in
the diagram.
(Fig.
1
2)
Unscrew
the
4
screws
shown
in
the
diagram before
opening the
PA
UNIT.
(Fig. 2)
3)
Unplug 2
plugs
from
J11
and J12
as
shown
in
the
diagram. (Fig. 3)
4)
Disconnect the 8-pin
connector from J7
on
the
PLL
UNIT
as
shown
in
the diagram. (Fig. 4)
5)
Disconnect the black connector
(indicated
by
*1).
(Fig. 4)
6) Slide
up and remove
the
TUNER CONTROL SOCKET
(indicated
by
*2) from
the
holder. (Fig.
4)
7)
Open
the
PA UNIT
as
shown
in
the diagram.
(Fig. 5)
8)
Unscrew
the 16 screws to
remove
the
PA UNIT
shield
cover
as
shown
in
the diagram. (Fig.
5)
9)
To remove
the
PLL
UNIT,
unplug the 4 plugs
from
J4,
J5,
J6 and J13 on
the
MAIN
UNIT.
(Fig. 3)
•
See
pgs.
31
and 32
for
the plugs connection informa-
tion.