Quarterly Preventive Maintenance Checks and Services Chart

TM 11-6625-409-12

3-11.

Quarterly Preventive Maintenance Checks and Services Chart

Sequence

No.

Item

Procedure

References

AN/ARM-45.......................................

Check to see that equipment is complete

App A..

Equipment connectors and mating cable Engage cable connectors {fig. 1-2) to the equipment

None

connectors. ..................................

connectors: check for ease of engagement and snug

fit. Refer all repairs for equipment connectors to

higher category of maintenance.

Publications ......................................

Check to see that all publications pertinent to this

DA Pam 310-4.

..........................................................

equipment are complete, usable, and current. Check

..........................................................

to see that all applicable changes are on hand.

Modification-work orders (MWO's).Check to see that all URGENT MWO's have been

DA Pam 310-4

..........................................................

applied and that all NORMAL MWO's have been

..........................................................

scheduled. Check to see that MWO stencils on the

..........................................................

equipment are legible.

3-12. Visual Inspection

3-14. Replacement of Test Lamps

a. Turn the test lamp lens counterclockwise to

Some causes of equipment failure can be detected by

visual inspection. Equipment troubles that can be

unscrew it from the lamp socket.

b. Press in on the lamp and twist it counter-

remedied by the operator are given below. AU other -

equipment failures should be referred to higher category

clockwise to unlock it from the lamp socket.

of maintenance.

c. Remove the defective lamp; insert a new lamp,

a. Check for incorrect setting of switches and

push in on the lamp, and turn it clockwise to lock it in

controls.

place.

b. Check to see that cable assemblies are not

d. Replace the test lamp lens.

disconnected or improperly connected.

c. Check the headset and microphone for loose

3-15.

Replacement of Radio Set Control 614U-6

connections.

(fig. 2-5)

d. Check to see that the external ac or dc power

source is operating properly.

a. Loosen the four retaining fasteners on the front

panel by turning each fastener one-quarter turn

3-13.

Equipment Performance Check

counterclockwise.

b. Pull the 614U-6 out far enough from the front

Perform the preoperational tests as described in

panel of the MX-3736/ARM-45 to gain access to the

paragraph 2-3 and note the equipment performance. If

cable assembly connected to the rear of the unit.

trouble occurs, perform a visual check (para 3-12) before

c. Disconnect the cable assembly from the

performing the corrective procedures below. If the

receptable at the rear of the 614U-6 by turning the two

corrective procedures do not clear the trouble, higher

cable connector screws counterclockwise until they are

category of maintenance is required. Note on the repair

disengaged from the receptable; then pull the connector

tag what mode of operation was being used, how the

straight out.

equipment performed, and what corrective action, if any,

d. Plug the cable assembly into the receptable on

was taken.

the rear of the replacement unit.

a. If any one test lamp does not light (as shown in

e. Tighten the cable connector retaining screws.

the chart in paragraph 2-3b or c), replace the defective

f. Carefully push the 614U-6 into the front panel

lamp (para 3-14).

opening of MX-3736/ARM-45. Be careful not to scrape

b. If none of the test lamp light, or the test lamp

or kink the cable assembly.

indications do not agree with those shown in the charts,

g. Secure the 614U-6 by turning the four retaining

replace the remote control unit (para 3-15) with one

fasteners one-quarter turn clockwise.

known

good

condition.

3-3