Replacement of Parts on or behind Plate Assembly 1A16

TM 11-5820-695-35

assembly 1A16. Tighten the two captive screws on

(5) Tag and unsolder wires connected to

each component.

terminals of power transformer 1A16A1OT1.

(6) Exercising care not to put stress on cable

harness wiring, remove power transformer lAl5AlOT1

(9) Remove the masking tape securing

from electrical equipment cabinet 1A15.

coaxial cables 1A15W27W9 and 1A15W16 to the sides

of electrical equipment cabinet LA15.

(10) Reconnect coaxial cables 1A2W1,

b. Replacement.

1A2W2, 1A3W1, 1A15W27W9, and 1A15W16 to the

components (fig. 8-13).

CAUTION

Exercise care while soldering the

CAUTION

cable harness leads to the power

Replacement of rigid coaxial cables

transformer terminals to prevent

must, be performed carefully to

damage to the cable harness leads or

prevent damage to the rigid coaxial

power transformer terminals.

cables.

(1) Solder wires removed in step a(5) above

(11) Connect rigid coaxial cable 1W17

to correct terminals of replacement power transformer

between 1HYlJl and 1AllJ5 (TM 114820-69612).

lA15A1OT1.

(12) Replace power supply 1A1 (para 8-22g (6)

(2) Insert the four mounting screws and

through (10)).

washers, removed in step a(4) above, into the power

(13 Restore power to T-1054(P)/GRC-144(V) or T-

transformer base mounting holes and then carefully

1054(P)A/GRC-144(V) (para 3-20b).

lower LA15A1OT1 onto the mounting bracket while

aligning the visible mounting screws with the bracket

mounting holes.

3-33. Replacement of Parts on or behind Plate

Assembly 1A1 6 (fir. 8and 3-16)

(3) Replace the four nuts on power

transformer lA15AlOTl mounting screws and secure

Plate assembly 1A16 must be removed from electrical

lA15AlOTl to the mounting bracket by tightening the four

equipment cabinet 1A15 (para 3-82) to gain access to

nuts firmly.

any of the parts mounted on the rear of plate assembly

(4) Position and fasten the three cable

1A16 (fig. 315) or to any of the parts mounted on

clamps on cable harness lA15AlOWl with the three

electrical equipment cabinet lA1S behinds plate

cable clamp nuts removed in step a(8).

assembly IA16 (fig. 3-8). Procedures are ,provided for

(5) Replace plate assembly 1A16 (para

replacement of power transformer 1A15A1OTl (para 8-

882b).

4), parts in the radio test set (para -85), and radio

(6) Restore power to T-1054(P)/GRC-144 (V)

frequency bandpass filter 1PO, radio frequency low pass

or T-1054(P)A/GRC-144(V) (para 3-20b).

filter 'IFIA, elbow adapter 1OP4, or directional coupler

LDC1 (para 386). All other parts can be replaced using

3-35. Replacement of Parts In Radio Test Set (p/o

general replacement techniques (par 3-19).

1A16) (fig. 8-12)

3-34.

Replacement

Po4ir

Transformer

a. Removal.

1A1SA1OT1 (fig.-8)

(1) Set the POWER ON/OFF switch on

a. Removal.

meter panel assembly 1A15A8 to OFF.

(I) Remove

power

from

T-

(2) Loosen the two set screws securing each

1054(P)/GRC144(V) or T-1054(P)A/GRC-144(V) (para

selector knob on the radio test set meter panel and

3-20a.

remove the selector knobs.

(2) Remove plate assembly 1A16 (pars

(3) Remove the two screws securing crystal

832a).

mixer 1A16Z1 mounting bracket to the radio test set

(3) Remove the three cable clamp nuts

meter panel.

securing cable harness lA15AlOWl (fig. 8-) to cabinet

(4) Remove the three screws securing

wall. Do not remove the cable clamps from the cable

variable attenuator 1A16AT1 to rear of the radio test set

harness.

meter panel.

(4) Loosen and remove the four screws, four

(5) Remove the eight screws securing the

washers and four nuts securing the base of power

radio test set meter panel to the radio test set enclosure.

transformer 1A15A1OT1 to mounting bracket.

Change 6

3-53