INSTALLATION AND OPERATING INSTRUCTIONS

TM 11-6625-2405-1H5

CHAPTER 2

Section I. SERVICE UPON RECEIPT OF EQUIPMENT

listings in paragraph 1-6. Report all discrepan-

2-1. Unpacking

cies in accordance with TM 38-750. Shortage of a

When packed for shipment, the maintenance ac-

minor assembly or part that does not affect pro-

cessories kit is placed in a corrugated shipping

er functioning should not prevent use of the

carton. The outside dimensions of the carton are

maintenance accessories kit.

approximately 10 by 19 by 22 inches. The volume

is approximately 1.3 cubic feet. Open the top

2-3. Installation

flaps of the corrugated carton, fold them back,

No specific installation instructions are required.

and remove the MK-1192/ARM.

The accessories are ready for immediate use upon

arrival at the direct support unit. The work bench

2-2. Checking Unpacked Equipment

to be used should be of suitable size to accommo-

a. Inspect the maintenance accessories kit for

date a Test Facilities Kit MK-91914/AR, the radio

damage incurred during shipment. If the mainte-

set to be checked, applicable components of the

nance accessories kit has been damaged, report

maintenance accessory kit (para 1-6) and other

the damage on DD Form 6 (para 1-3 b).

common test equipment such as a multimeter,

signal generator etc. used for testing the radio

b. See that the maintenance accessories kit is

set. A convenient source of 28 volts dc is re-

complete as listed on the packing slip. If a pack-

quired for the MK-994/AR.

ing slip is not included, check the kit against the

Section Il. OPERATION

points on extender boards for printed circuit

2-4. General

cards.

The maintenance accessories kit is a passive de-

vice and contains only one operating control, the

2-5. Connections

(figs. 2-1-2-7)

ON-OFF switch on each breakout box. Aside

from use of that toggle switch, there is no opera-

Specific items of the maintenance accessory kit to

tion as such. By use of the termination box and

be used in testing any radio sets are specified in

associated cables (connected through the cord

the direct support technical manual (Appendix

and U-93A/U plug to the MK-994/AR) audio

A) for that radio set. Similarly, the connections

signals can be applied to the microphone circuits

to be made, the card extenders to be used, and

of the radio set and audio output signals from

adapter connectors needed, depend on the tests

the radio set can be monitored and measured. In

or measurments to be performed.

addition, direct support level maintenance per-

a. Place the components on a work bench near

sonnel are afforded access to the following:

the test facilities kit and the power source.

a. Certain adjustment points inside the radio

b. Open the radio set to be tested; follow in-

structions in the applicable technical manual to

b. Voltage- and resistance- measurement

separate the front and rear halves and to remove

points in the line between the MK-994/AR and

top or bottom covers as required.

the external power and control connector (A2J1)

Note

the radio set.

If in-line measurements are required, use break-

out box; if only internal measurements or cer-

c. Voltage- a n d resistance- measurement

tain adjustments are to be made, use the ex-

points in the front-rear connector of the radio set.

tender cable.

d. Voltage- and resistance- measurem ent test

2-1