Chapter 3. UNIT MAINTENANCE INSTRUCTIONS

TM 11-5830-263-20&P

UNIT MAINTENANCE INSTRUCTIONS

SECTION I

General Information .................................................................................................... 3-1

SECTION II

LRU Removal and Replacement Procedures ............................................................. 3-1

SECTION III

Headset(s) Components Removal and Replacement Procedures ............................. 3-12

SECTION IV

Cable Removal and Replacement .............................................................................. 3-30

SECTION V

LRU Knob(s) Removal and Replacement Procedures ............................................... 3-31

SECTION VI

Preparation for Storage or Shipment .......................................................................... 3-33

SECTION I

GENERAL INFORMATION

3.1.

SCOPE

This chapter covers removal and replacement procedures for three major groups of AN/VIC-3(V) or VIS

(Vehicular Intercommunication Set) equipment: the Line Replaceable Units (LRU) (MCS, FFCS, RIT,

MOS, LOUDSPEAKER), the Headset Components and the VIS Cabling (Highway, Power, Alarm, etc.).

Additionally, Removal and Replacement Procedures for the Knobs on the LRU's are also covered.

SECTION II

LRU REMOVAL AND REPLACEMENT PROCEDURES

CAUTION

REMOVE POWER FROM THE MCS BEFORE REMOVING OR REPLACING

COMPONENTS/CABLES. FAILURE TO DO SO MAY RESULT IN DAMAGE TO

COMPONENTS.

NOTE

Verify the crewstation(s) setting (1,2,3,4,5,6) for the FFCS and/or radio settings for the

RIT(C/E, D/F) being removed so that the replacement FFCS/RIT can be correctly set. For

instructions on setting the FFCS/RIT refer to the appropriate paragraph in Chapter 2.

The LRU's (MCS, FFCS, RIT, MOS) are mounted on studs or plates utilizing varying sequences of

grounding straps and/or washers (lock and flat), and secured with either nuts or bolts. Paragraph 3.7 at

the end of this section lists tables and figures showing the mounting sequences associated with the

various LRU's. Refer to paragraph(s) 3.2 through 3.6 for removal and replacement procedures and

instructions for the appropriate LRU. It should be noted that although some of the mounting sequences

for LRUs for various vehicles look identical the actual parts might differ. Refer to the Repair Parts and

Special Tools List (RPSTL) in Appendix C for proper identification of the correct part.

3-1