Special Instructions

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

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.

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.

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