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ページを印刷する2. 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).
b. 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-
6
ume control 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.
(b) (SYSTEMS SABER III 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/controller 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.