Icom IC-821H Instruction Manual page 53

OPTION INSTALLATIONS 12 Hi
Mi Opening the transceiver's case
Follow the case and cover opening procedures
shown here when you want to install an optional unit
or adjust the internal units, etc.
.
CAUTION: DISCONNECT the DC power cable
from the transceiver before performing any work
on the transceiver. Otherwise, the transceiver
may be damaged.
LLL
@ Remove 8 screws from the trans-
ceiver's top and 4 screws from the
sides, then lift up the top cover.
®© Turn the transceiver upside down.
@ Remove 4 screws from the bottom x D T oig
cover, then lift up the bottom cover.
© Now you can see the MAIN unit.
@ Remove the top and bottom covers
as shown above.
(2) Loosen the gutter screw on each
side of the front panel's rear side.
@ Remove 1 screw from each side of
the front panel's rear side.
@ Pull the front panel forward as
shown by the arrow at right.
© Loosen 1 flat head screw from each
side of the MAIN unit chassis.
© Remove the 2 silver screws from
the rear panel.
@) Lift up the MAIN unit chassis to see
the PLL unit.
Tighten the screws (labelled ©) to
fix the MAIN unit chassis in a ver-
tical position.
MAIN unit chassis
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