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TM 11-5820-882-23/TM 06827A-23/2
module into place.
(2) Insert screwdriver into side slot nearest bot-
tom side (battery side) of radio and pry up module using
Modulator MixerJ and Synthesizer
f.
Vco,
the left thumb to restrict travel. Move screwdriver to the
Modules.
middle slot on if/af module and pry up. Remove
(1) Hold radio in left hand with modules facing
module with fingers by using slight side to side rocking
up. Insert screwdriver into slots in frame and gently pry
motion of module.
up the removable circuit board with the three modules
(3) To inset i-f/a-f module, align module pins
attached.
with frame sockets and gently push module into place.
Filter/ I-F Module.
c.
modules from frame sockets and pull it away from the
radio panel to expose the CHAN switch cable connec-
(1) First remove the i-f/a-f module.
tor. Pull removable circuit board far enough away from
(2) Hold radio in left hand with bottom side (bat-
panel (approximately 3/4 inch) to grip the cable connec-
tery connector side) in palm and left thumb over anten-
tor with the thumb and forefinger of the left hand; then
na coupler module (rear part of thumb should be over
unplug the connector by gently pulling away with the
the filter/i-f module). Carefully pry up the i-f/a-f end
removable circuit board assembly.
of the filter/i-f module with the screwdriver. Then pry
(3) The three modules may be removed now by
up the opposite end of filter/if module and remove
pulling them up from the removable circuit board with
module with your fingers.
the fingers.
(3) To insert filter/i-f module, align module pins
with frame sockets and gently push module into place.
(4) To insert the vco, modulator/mixer, or syn-
thesizer module, align the module pins with the sockets
d. Transmitter Module.
on the removable circuit board. Gently push the module
(1) First remove  the i-f/a-f and converter
into place. When all three modules are installed on the
modules.
removable circuit board, connect the synthesizer cable
(2) Hold radio in left hand with transmitter
assembly. Align the removable circuit board pins with
module facing up. Remove module with right thumb
the frame sockets and gently push the removable circuit
and forefinger on ends. Use a top (panel) -to-bottom
board into place. Make sure the modules and removable
rocking motion to loosen the module in the frame
circuit board are properly seated.
sockets.
(3) To insert the module, align module pins with
3-11. Special Instructions
frame sockets and gently push module into place.
a.
Always inspect a module for bent or broken pins
e. Antenna Coupler Module.
before inserting it into the frame sockets. To straighten
(1) First remove i-f/a-f and converter modules.
bent pins, use needle-nose or long-nose pliers with
smooth jaws. Position the jaws so that the whole pin is
(2) Hold the radio in left hand with antenna
coupler module facing up. Remove module with right
straightened simultaneously (see fig. 3-11 ).
b. When inspecting for bent pins, the pins should
thumb and forefinger on the ends. Use a top (panel) -to-
bottom rocking motion to loosen the module in the
appear to be reasonably vertical in relation to the
sockets.
module bottom surface. Bent pins usually result when
excessive prying force is applied to only one end or side
(3) To insert antenna coupler module, align
module pins with frame sockets and gently push
of a module. The thumb of the opposite hand should
Figure 3-10. Module removal.
3-16


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