Motorola SYSTEMS SABER SECURENET Handie-Talkie Посібник з експлуатації - Сторінка 14
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SERVICING MAJOR SUBASSEMBLIES
a.
Baseplate
All repairs
to
the baseplate
assembly can,
and
should, be made
with the radio
chassis
inside the
radio.
After the slotted-spanner nuts are loosened, the
baseplate
is held
in
place
by the power contact
screw.
The
retainers holding the slotted-spanner nuts
in
place are
not
reusable. Replacement of the retain-
ers requires special
insertion procedures; refer to
the instruction
sheet provided
with the
slotted-
spanner
nut kit.
The
"o-ring" portion of the elastomer
seal
must be
fully seated
on
the threaded bushing before the
baseplate
is reassembled (the bushing is part of
the housing assembly).
.
Housing Assembly
The
housing assembly includes many parts that
are
not
replaceable
or repairable.
The
insulator on the universal connector
can, and
should, be replaced
if
the old insulator has been
torn.
When replacing the insulator take care
to
keep
it
out of the main
seal o-ring's seating area.
The
PTT
lever can be replaced by prying
out the
old part with
a
soft plastic tool.
The
plastic housing
around the lever may be
damaged
if
a
harder tool
is used.
c
.
Control Top Panel
The
control top panel is
fastened
to the
frame by
the on/off/volume and frequency switches, and two
self-tapping screws;
it
should be removed
from
the
frame only
if
absolutely necessary.
If
repair is
required,
always
start the
screws
into
the control
top panel by hand before tightening them with
a
torque wrench; this will help avoid cross-threading
and stripping of the plastic panel.
The
on/off/volume and
frequency knobs are 2-part
kits;
each
kit
consists
of
a
knob and an insert.
Once
an insert is removed,
it
cannot be used again;
therefore, remove an insert only
if
the on/off/vol-
ume contro! or frequency switch must be replaced,
or
if
the control top must be removed
from
the
frame.
d.
LCD/Speaker Bracket Assembly
The
SYSTEMS SABER
radio's
LCD
assembly
and/or controller board
can be replaced,
but the
com-
ments and cautions
in
this manual must be strictly fol-
lowed.
(1)
Removing the
LCD Assembly
and Controller
Board:
(a) Carefully unplug the interconnect and speaker/
microphone flexible circuits
from
the radio.
(bo)
(SYSTEMS SABER
Ill
only) After ensuring that all
static safeguards are
in
effect,
turn
the
LCD/speak-
er bracket assembly over (display facing up), insert
a thin
plastic blade (such as
a tuning wand)
between the
top
edge
of the
keypad membrane
switch and the
LCD
bezel, and break
the
adhesive
bond between the
bezel and the membrane switch.
(c)
Turn the
assembly over
(front
shield facing down)
and, using
a
thin-bladed screwdriver, gently pry the
controller board
away
from the two
speaker bracket
tabs
(the tabs next
to
the speaker).
(d)
Place
your middle finger
on.
the top center tab and
your thumb on the
bottom left
tab of the controller
board, and gently pry the shield/controlier board
assembly away
from the front
shield.
(e)
Gently
lift
the shield/controller board
assembly
away
from
the front shield, rotating
it
around the
front
shield
until
the keypad flexible circuit lies flat
and the display is facing upward.
(f) Insert
a
thin-bladed screwdriver between the plug
on
the keypad flexible circuit and the controller
board, and gently pry upward
on
the plug
until
it
is
free
from
the board.
(g)
With the controller board facing upward, locate the
retaining tab on the top
edge
of the controller board
and deflect the shield near the tab while
lifting
the
board
up
and
away
from
the shield.
The
circuit
board and interconnect flexible circuit
can
then
be
pulled forward and out.
(g) Unplug the interconnect flexible circuit
from
the
controller board.
6