Repair Procedures - TM-11-5820-509-350148

TM 11-5820-509-35

head of this 6-32 screw, and a net washer, lock washer,

subassemblies or between individual

and hex nut above the chassis at the bracket end).

assemblies are removed to affect

repairs, tag each wire carefully so

NOTE

that it may be reconnected to its

If interconnecting wires between

proper terminal location.

subassemblies,

between

components

and

the

module

(2) Repair Procedures.

Replace any

connector must be removed to affect

defective component or repair the circuit using the

repairs, tag each wire carefully so

procedures outlined in section IV. Component parts

that it may be reconnected to its

shown on the module schematic diagram (fig. 7-3) are

prop. terminal location.

located in figures 3-52 and 3-53.

CAUTION

directly to the chassis may be removed by first

Do not attempt to repair card

disconnecting the component lead and then removing

assembly E2. This subassembly and

the mounting hardware that secures the component to

the encapsulated crystal circuit must

the module chassis.

be carefully removed and returned to

the depot for repair and adjustment.

(2) Repair Procedures.

Replace any

Failure to do so may result in off-

defective component or repair the circuit using the

frequency operation or malfunction

procedures outlined in section IV. Component parts

of the equipment. When using a

shown on the module schematic (fig. 7-12) are located

soldering iron to remove or replace a

in figures 3-45 through 3-51.

component part, use only enough

head to cause solder to flow. Excess

CAUTION

heat can damage the component and

When using a soldering iron to

may also damage the printed circuit.

remove or replace a component part,

use only enough heat to cause the

solder to flow. Excess heat can

(a) Remove card assembly E2 as

damage the component and may also

follows:

damage the printed circuit card.

1. Unsolder and tag the wires that

(3) Reassembly Procedures.

connect to card assembly E1 and to resistor R44 on the

(a) Replace and solder any wires

chassis; disconnect the shielded wire on the back of

removed from the module connector or between

card assembly E2.

subassemblies during the disassembly or repair

2. Carefully press card assembly

procedures.

E2 out of its location through the side of the module.

(b) Install the subassemblies in their

respective locations and secure each in place with the

NOTE

appropriate hardware. If voltage regulator subassembly

Press the top of the card over the lip

TB1 has been removed, install this assembly before

of the chassis toward the rear of the

attaching subassemblies no. 1 and no. 2 to the module

unit, then work the card upward until

chassis.

the bottom of the card can be

removed over the rim at the bottom

of the module chassis.

module and secure it with the hardware removed earlier.

e. Radio Frequency Oscillator 0-1032/P:RC-47

(A8A6). (fig. 3-12, 3-13, 3-52 and 3-53)

(3) Reassembly Procedures.

(1) Disassembly Procedures.

(a) If card assembly E2 has been

removed, carefully install the replacement unit in the

(a) Loosen and remove the two 4-40 x

same location.

Refer to figure 3-52 for proper

5/16 pan head screws in the top of the module cover,

orientation o f this card assembly.

then pull the cover from the chassis of the module.

(b) To remove the card assemblies (fig.

NOTE

312 and 3-13), loosen and remove the six 2-56 x 3/16

Before installing card assembly E2,

pan head screws that secure them to the module

be sure that the sponge rubber

chassis; carefully lift each card assembly out of the

covering is installed over the top of

module.

the card and encloses the oscillator

subassembly and its tank circuit

NOTE

components.

The 500-kHz circuits are mounted

directly to the module chassis.

(b) Solder any wires removed from the

Defective individual components of

module connector or between card assemblies during

this circuit may be removed and

disassembly or repair procedures.

replaced

required.

interconnecting wires between the

module

connector

and

the

assigned positions (fig. 3-12).

3-101