Motorola SABER Handie-Talkie Посібник із швидкого старту - Сторінка 4

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Motorola SABER Handie-Talkie Посібник із швидкого старту
(5)
Observe
the
gauge
for
approximately
two
minutes.
©
If
the
needie falls
2 in. Hg or
less
(for
example,
from 5
in.
Hg
to
3
in.
Hg),
then
the radio has
passed
the vacuum test and
is approved for
submersibility.
No
additional testing
will
be required.
©
If
the needle falls more than 2
in.
Hg (for
example,
from 5 in.
Hg
to
less
than 3 in.
Hg),
then the radio
has
failed the vacuum
test
and the radio might
leak
if
submersed. Additional troubleshooting
of
the radio will be required; complete this
procedure, then go
to
the
"PRESSURE
TEST"
section
of this
manual.
(6) Remove the vacuum hose and adapter
from
the radio.
6.
PRESSURE TEST
Refer
to
the
exploded view diagrams and
parts lists
in
the
applicable service manual.
a.
General
Pressure testing
the radio is
necessary
only
if
the radio has failed the vacuum test. Do not
perform the
pressure test
until
the
vacuum test
has been completed. Pressure testing involves
creating a pressure condition inside
the radio,
submersing the
radio
in
water, and
observing the
radio for
a stream
of
bubbles (leak).
Since
all
areas
of
the radio are being
checked, observe
the
entire unit carefully for the possibility
of multiple
leaks
before completing this test.
b.
Conducting
the
Test
(1)
Screw
the adapter (with
gasket)
into the
tapped hole
in
the baseplate.
(2)
Attach one
end
of
the
pressure hose
to
the
adapter and
the other end
to
the pressure
pump.
(3)
Operate
the pump until the
gauge reads
approximately
1
psig. Some leak-down
is
normal
as
the pressure
equalizes across
the
port
seal
membrane.
(4)
Maintain the pressure at
1
psig and submerse
the radio
into
a
water-filled container.
(5) Watch
for
any continuous series
of
bubbles.
NOTE
Some air entrapment
may
cause
the
accumulation
of
bubbles, especially
in
the grille
area,
but
the bubbles should
not
be
continuous.
(6) Note
all of the
seal areas
that
show signs
of
eakage.
Pinpoint the problem(s)
to
one
(or
more) of the following
areas:
(a) housing
(b)
baseplate elastomer seal
or
vacuum
port
seal
(c) antenna bushing seal
or
lightpipe
seal
(d)
frequency switch and
on/off/volume
control
(e)
rf
connector
(f)
dual-function switch and actuator
assembly
(g) frame stud seals
(h) main
seal
(7)
Remove
the radio
from
the water container
and dry
it
thoroughly.
Be especially careful
to
dry the
area around
the main
seal
to
prevent
contamination of the internal electronics while
the
unit is
open.
Also,
to
keep
the area around
the port
seal
dry,
make sure that there
is no
water around the baseplate vacuum
port.
(8)
Remove
the
adapter
and
pressure hose
added
in
steps (1) and (2).
c. Troubleshooting Leak Areas
Before repairing any leak, read
all
applicable
area
repair paragraphs.
This
will help to
eliminate
unnecessary disassembly
and
reassembly
of
a
radio with multiple
leaks. Troubleshoot
only the
faulty
seal areas listed
in
the
"PRESSURE TEST"
section, and, when
multiple
leaks exist,
in
the
order listed.
NOTE
Before reassembling the radio,
always
install
a
new main seal O-ring, and new O-rings
in
the
defective area.
(1) Housing
lf
a
leak occurs
in
any
portion of the
housing
assembly
(monitor,
push-to-talk,
or
RAT
switches,
speaker
grille,
or
universal connector), replace the
housing.
(2)
Baseplate Elastomer
Seal
or Vacuum
Port
Seal
(a)
These seals can,
and should, be repaired
without removing the radio
chassis
from
the
housing assembly.
Remove
the baseplate by
loosening
the
slotted-spanner
nuts and
removing the center battery contact screw.
NOTE
Before removing the
baseplate,
note the
location and orientation of the battery latch and
battery latch spring.
(b)
Inspect the elastomer seal
for
damage
or
foreign material; replace
or
clean as
necessary. Remove the
old
vacuum
port
seal,
and
inspect
the
sealing surfaces
of
the
housing and baseplate
for
damage; replace
any faulty items, and install a new vacuum
port
seal.
(c)
Ensure
that the center O-ring portion
of
the
elastomer seal
is fully
seated
around the
threaded bushing
in
the housing.
Reassemble
the baseplate with the
convex surface
of the
latch spring toward the
baseplate. Tighten the
battery contact
screws
and
slotted-spanner
nuts to the correct torque.
(3) Antenna Bushing
Seal
or Lightpipe
Seal
(a)
Check
the antenna bushing
spanner
nut for
correct torque.
If
the nut is loose, tighten
it
to
the correct
value
and
run
the pressure
test
again.
If
the
nut is not
loose,
the
antenna
bushing must be replaced. This
will require
the removal of the main circuit board from the
frame
assembly according
to
the following
procedure:
1.
Referring
to
the
"DISASSEMBLY"
section
in
the
applicable service manual,
disassemble
the radio
until the
speaker
bracket assembly
is
disconnected
and
removed
from
the frame assembly.
2.
Read
the
precautions outlined
in
the
"SERVICING MAJOR SUBASSEMBLIES"
section
of
the
service
manual before
performing
steps
3 through 8, below.
3.
Disconnect
the
PTT/controls flexible
circuit
from
the radio circuit board.
4.
Remove
the back shield.
5.
Remove
the two bottom connector
screws
and three power amplifier module
(U202)
screws
(one through the
PC
board, and
two through the frame), securing the main
circuit board.
6.
Gently remove
the ground clip.
If
the clip
is bent during removal, replace
it.
7.
Remove
the power amplifier module
(U202).
8.
Grasping
the main circuit board at the
bottom
connector end,
lift
the board and
carefully slide
it
out from under the control
top
panel.
CAUTION
When the main circuit board is
removed, fragile
wireform and
ground
contacts are exposed. Handle gently to
avoid damage.
(b)
The
control top panel must now be removed
from the
frame assembly.
Remove
the two
screws
that hold the panel
to
the side
of
the
radio frame.
(c)
Remove
the on/off/volume control and
frequency switch knobs by grasping the
tip of
each
knob with pliers and pulling the knob
off
the
shaft
of
the switch. Open the insert by
inserting a screwdriver blade
into
the insert's
slot, then
pull
the nsert
off
the shaft.
Remove
the torque
washer
from the
volume control,
if
necessary.
(d)
Remove
the detent
washer
from
around the
frequency switch, noting the orientation
of
the
washer, relative
to
the switch,
prior
to
removal.
Then, remove
the
spanner
nut from
each
switch.
(e) Noting the location
of the
lightpipe, which
will
be
loose,
lift
the control top panel off the
frame.
(f)
Remove
the antenna bushing
spanner
nut
and
the
antenna bushing
from the
control top
panel. inspect
the
sealing surfaces
on
the
control top panel and
bushing; replace faulty
items
as
required.
Remove
and discard the
old
antenna bushing O-ring, and install
cea
new
one.
CAUTION
Ensure
that all
static electricity
safeguards are
in
place
prior to
beginning radio disassembly.
(g) Before reassembling
the radio,
inspect the O-
rings
on
the lightpipe, on/off/volume control,
and frequency switch for
damage
and foreign
material.
Also, ensure
that the lightpipe and
the antenna bushing's hex head are properly
seated
in
the control top panel.
(h)
Reassemble
the radio
in
reverse
order
of
disassembly, using new frequency switch and
onoff/volume
control
knobs and inserts.
CAUTION
Pressure any greater
than
1
psig may push
air around the main
seal and
may
damage
the grille area.
(5)
Observe
the
gauge
for
approximately
two
minutes.
©
If
the
needie falls
2 in. Hg or
less
(for
example,
from 5
in.
Hg
to
3
in.
Hg),
then
the radio has
passed
the vacuum test and
is approved for
submersibility.
No
additional testing
will
be required.
©
If
the needle falls more than 2
in.
Hg (for
example,
from 5 in.
Hg
to
less
than 3 in.
Hg),
then the radio
has
failed the vacuum
test
and the radio might
leak
if
submersed. Additional troubleshooting
of
the radio will be required; complete this
procedure, then go
to
the
"PRESSURE
TEST"
section
of this
manual.
(6) Remove the vacuum hose and adapter
from
the radio.
6.
PRESSURE TEST
Refer
to
the
exploded view diagrams and
parts lists
in
the
applicable service manual.
a.
General
Pressure testing
the radio is
necessary
only
if
the radio has failed the vacuum test. Do not
perform the
pressure test
until
the
vacuum test
has been completed. Pressure testing involves
creating a pressure condition inside
the radio,
submersing the
radio
in
water, and
observing the
radio for
a stream
of
bubbles (leak).
Since
all
areas
of
the radio are being
checked, observe
the
entire unit carefully for the possibility
of multiple
leaks
before completing this test.
b.
Conducting
the
Test
(1)
Screw
the adapter (with
gasket)
into the
tapped hole
in
the baseplate.
(2)
Attach one
end
of
the
pressure hose
to
the
adapter and
the other end
to
the pressure
pump.
(3)
Operate
the pump until the
gauge reads
approximately
1
psig. Some leak-down
is
normal
as
the pressure
equalizes across
the
port
seal
membrane.
(4)
Maintain the pressure at
1
psig and submerse
the radio
into
a
water-filled container.
(5) Watch
for
any continuous series
of
bubbles.
NOTE
Some air entrapment
may
cause
the
accumulation
of
bubbles, especially
in
the grille
area,
but
the bubbles should
not
be
continuous.
(6) Note
all of the
seal areas
that
show signs
of
eakage.
Pinpoint the problem(s)
to
one
(or
more) of the following
areas:
(a) housing
(b)
baseplate elastomer seal
or
vacuum
port
seal
(c) antenna bushing seal
or
lightpipe
seal
(d)
frequency switch and
on/off/volume
control
(e)
rf
connector
(f)
dual-function switch and actuator
assembly
(g) frame stud seals
(h) main
seal
(7)
Remove
the radio
from
the water container
and dry
it
thoroughly.
Be especially careful
to
dry the
area around
the main
seal
to
prevent
contamination of the internal electronics while
the
unit is
open.
Also,
to
keep
the area around
the port
seal
dry,
make sure that there
is no
water around the baseplate vacuum
port.
(8)
Remove
the
adapter
and
pressure hose
added
in
steps (1) and (2).
c. Troubleshooting Leak Areas
Before repairing any leak, read
all
applicable
area
repair paragraphs.
This
will help to
eliminate
unnecessary disassembly
and
reassembly
of
a
radio with multiple
leaks. Troubleshoot
only the
faulty
seal areas listed
in
the
"PRESSURE TEST"
section, and, when
multiple
leaks exist,
in
the
order listed.
NOTE
Before reassembling the radio,
always
install
a
new main seal O-ring, and new O-rings
in
the
defective area.
(1) Housing
lf
a
leak occurs
in
any
portion of the
housing
assembly
(monitor,
push-to-talk,
or
RAT
switches,
speaker
grille,
or
universal connector), replace the
housing.
(2)
Baseplate Elastomer
Seal
or Vacuum
Port
Seal
(a)
These seals can,
and should, be repaired
without removing the radio
chassis
from
the
housing assembly.
Remove
the baseplate by
loosening
the
slotted-spanner
nuts and
removing the center battery contact screw.
NOTE
Before removing the
baseplate,
note the
location and orientation of the battery latch and
battery latch spring.
(b)
Inspect the elastomer seal
for
damage
or
foreign material; replace
or
clean as
necessary. Remove the
old
vacuum
port
seal,
and
inspect
the
sealing surfaces
of
the
housing and baseplate
for
damage; replace
any faulty items, and install a new vacuum
port
seal.
(c)
Ensure
that the center O-ring portion
of
the
elastomer seal
is fully
seated
around the
threaded bushing
in
the housing.
Reassemble
the baseplate with the
convex surface
of the
latch spring toward the
baseplate. Tighten the
battery contact
screws
and
slotted-spanner
nuts to the correct torque.
(3) Antenna Bushing
Seal
or Lightpipe
Seal
(a)
Check
the antenna bushing
spanner
nut for
correct torque.
If
the nut is loose, tighten
it
to
the correct
value
and
run
the pressure
test
again.
If
the
nut is not
loose,
the
antenna
bushing must be replaced. This
will require
the removal of the main circuit board from the
frame
assembly according
to
the following
procedure:
1.
Referring
to
the
"DISASSEMBLY"
section
in
the
applicable service manual,
disassemble
the radio
until the
speaker
bracket assembly
is
disconnected
and
removed
from
the frame assembly.
2.
Read
the
precautions outlined
in
the
"SERVICING MAJOR SUBASSEMBLIES"
section
of
the
service
manual before
performing
steps
3 through 8, below.
3.
Disconnect
the
PTT/controls flexible
circuit
from
the radio circuit board.
4.
Remove
the back shield.
5.
Remove
the two bottom connector
screws
and three power amplifier module
(U202)
screws
(one through the
PC
board, and
two through the frame), securing the main
circuit board.
6.
Gently remove
the ground clip.
If
the clip
is bent during removal, replace
it.
7.
Remove
the power amplifier module
(U202).
8.
Grasping
the main circuit board at the
bottom
connector end,
lift
the board and
carefully slide
it
out from under the control
top
panel.
CAUTION
When the main circuit board is
removed, fragile
wireform and
ground
contacts are exposed. Handle gently to
avoid damage.
(b)
The
control top panel must now be removed
from the
frame assembly.
Remove
the two
screws
that hold the panel
to
the side
of
the
radio frame.
(c)
Remove
the on/off/volume control and
frequency switch knobs by grasping the
tip of
each
knob with pliers and pulling the knob
off
the
shaft
of
the switch. Open the insert by
inserting a screwdriver blade
into
the insert's
slot, then
pull
the nsert
off
the shaft.
Remove
the torque
washer
from the
volume control,
if
necessary.
(d)
Remove
the detent
washer
from
around the
frequency switch, noting the orientation
of
the
washer, relative
to
the switch,
prior
to
removal.
Then, remove
the
spanner
nut from
each
switch.
(e) Noting the location
of the
lightpipe, which
will
be
loose,
lift
the control top panel off the
frame.
(f)
Remove
the antenna bushing
spanner
nut
and
the
antenna bushing
from the
control top
panel. inspect
the
sealing surfaces
on
the
control top panel and
bushing; replace faulty
items
as
required.
Remove
and discard the
old
antenna bushing O-ring, and install
cea
new
one.
CAUTION
Ensure
that all
static electricity
safeguards are
in
place
prior to
beginning radio disassembly.
(g) Before reassembling
the radio,
inspect the O-
rings
on
the lightpipe, on/off/volume control,
and frequency switch for
damage
and foreign
material.
Also, ensure
that the lightpipe and
the antenna bushing's hex head are properly
seated
in
the control top panel.
(h)
Reassemble
the radio
in
reverse
order
of
disassembly, using new frequency switch and
onoff/volume
control
knobs and inserts.
CAUTION
Pressure any greater
than
1
psig may push
air around the main
seal and
may
damage
the grille area.