Reassembly Procedures

TM 11-5820-509-35

withdraw M ADJ shaft (72) from the switch shaft of

leads tagged, and then the attaching hardware (if any)

detent (49).

removed.

b. Repair Procedures.

potentiometer (90); then loosen and remove hex nut (8;)

(1) Examine all parts of the disassembled

and lock washer (81).

XMTR PWR switch for damage or excessive wear.

(d) Remove nuts (77), (78), (84), and

Particular attention should be given to switch shafts,

(85), net washers (76) and (83), fiber washers (50), (52),

ceramic switch parts, and contact fingers, potentiometer

(53), (55), (62), (64), (68), (70), (75), and (82) with

operation and hardware appearance. Replace any parts

spacers (51), (54), (63), and (69). Carefully withdraw

that show signs of damage, excess wear, or corrosion.

switch wafers (56) and (73) from screws (47), and (48).

(2) Do not lubricate the switch contacts or

(4) Remove relay bracket (24) from the

detent. Damage to switch parts and adjacent circuits

power amplifier compartment as follows:

can result from lubrication of this assembly .

(a) Unsolder and tag the two wires

c. Reassembly Procedures. Depending on the

connected to the outboard terminal of capacitor (40).

amount of disassembly required and the parts that have

been removed, some steps of the following procedure

(b) Loosen and remove screws 193)

may be omitted.

and (94) and their associated hardware; then remove

the relay bracket through the bottom of the chassis.

(1) Replace, attach, and solder the piece

parts to their respective circuits on the inside of relay

bracket (24):

from relay (17) must be carefully unsoldered from the

relay terminal and withdrawn through grommet (29)

(a) Relay (59) is secured to the relay

before cutting the lacing cord that secures it to the cable

bracket with 4-40 x 1/4 pan head screws (18) and (34),

harness.

lock washers (58) and (60) and hex nuts (57) and (61).

(b) Terminals (20), (32), and 141) are

CAUTION

secured to their respective positions inside the relay

Use extreme care when working near

bracket with 4-40 x 1/4 pan head screws (39), (25), and

relay (17). Excessive heat or rough

(35) respectively.

handling can break the glass

envelope of this relay.

to the rear wall of the relay bracket with hex nut (22) and

lock washer (23); capacitor (28) is placed in clip (27)

before soldering.

(5) Remove rf transformer (12) as follows:

(2) Install relay bracket (24) in the power

(a) Unsolder the insulated bus wire

amplifier compartment and secure it to the side wall with

from the lower terminal of relay (17).

Carefully

4-40 x 5/16 pan head screw (93), flat washer (94) lock

straighten this wire and withdraw it from the small hole

washer (97) and nut (99).

near the top of transformer (12).

(3) Insert the shielded wire (receive antenna)

(b) Carefully unsolder the rf detector

through grommet (29) and secure the shield (with lug 98

leads (small wires) from the terminals near the bottom

attached) with 4-40 x 5/16 pan head screw (94), flat

of the transformer.

washer (96), lock washer (100), and hex nut (101).

(4) Insert relay (17) in the large hole in relay

(15) with flat washers (13) and (16) that secure the

bracket (24); orient the relay with the armature terminal

transformer to relay bracket (24).

to the right. Install lock washer (30) and secure in place

(6) Remove

relay

(17)

carefully

with hex nut (31). Install and solder the leads on the

unsoldering the wires from the base of the unit. Loosen

base of the relay.

hex nut (31) and remove lock washer (30).

(5) Install transformer (12) to the top of relay

bracket (24) and secure with 4-40 x 5/16 pan head

NOTE

screws (14) and (15) using flat washers (13) and (16).

If the relay is defective, unsolder the

Attach the two rf detector leads (small wires) to the

antenna bus (short heavy wire) to

terminals near the bottom of the transformer; then pass

which the solder lug is attached;

the insulated bus wire through the small hole near the

save this bus wire for installation on

top of the transformer. Attach this bus lead to the

the replacement relay.

normally open (lower) contact of relay (17) and carefully

solder it. Dress this lead away from the envelope of

(7) Defective piece parts attached to relay

relay (17) and then dress it downward on the opposite

bracket (24), including capacitor (28), resistors (19) and

side of the transformer toward the front of the lower

(33), terminals (20), (32), and (41), and/or relay (59),

roller inductor.

may be unsoldered from their respective circuits, their

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