Section II. EQUIPMENT LOCATION AND SYSTEM CONFIGURATION DIAGRAMS

TM11-5830-263-20&P

a. Loudspeaker and/or Loudspeaker Cable Problems.

1. Turn MCS off and disconnect Loudspeaker cable at MCS if connected.

2. Turn MCS on. If problem has disappeared, turn MCS off and reconnect Loudspeaker cable.

3. Turn MCS on. If problem reappears, turn MCS off and substitute with known good

Loudspeaker and cable.

4. Turn MCS on If problem disappears, Loudspeaker and/or cable may be faulty. Refer to the

troubleshooting procedures in Sections IV and VI.

5. If problems reappear, MCS may be faulty. Refer to the troubleshooting procedures in Section

IV.

b. Do a system configuration (as explained in the Operator's manual). Verify what the MCS

identifies as connected in the ring and that it corresponds to the vehicle placard located next to

the MCS in the vehicle, or as shown on the Equipment Location Diagram for the specific vehicle

in Section II of this chapter. If there is not a match with what the MCS identifies and what is on the

vehicle placard then the following may have occurred:

1. Cables may be disconnected, in which case they need to be physically inspected and

reconnected.

2. The FFCS or RIT have not been correctly set, in which case they need resetting. The

procedures for setting the crewstation/radio switch for the FFCS/RIT can be found in Section

III of this chapter.

3. If cables are connected, and the FFCS and RIT are properly set and problems still exist in

terms of the system configuration mode then refer to the troubleshooting procedures in

Section IV.

If the system is properly configured, place the SYSTEM switch on the program being utilized

(PROG 1, 2, or 3,), and the PROGRAM switch on VIEW. Observe the levels of radio access

programmed into the MCS. If discrepancies are noted reprogram the MCS using the Operator's

manual. If discrepancies still exist, or the MCS will not program, refer to the troubleshooting

procedures in Section IV.

SECTION II

EQUIPMENT LOCATION AND SYSTEM CONFIGURATION DIAGRAMS

2.4.

GENERAL

As stated in the previous section problems with the VIS can occur in various forms. System problems may

occur without showing up as error messages on the alphanumeric display, or system problems may occur

that do show up as error messages on the alphanumeric display. Corrective action for the VIS involves

principally the replacement of a single unit (box or cable), or, in the case of a headset, a component part.

The procedures apply whether trouble is in radio or intercom communications. Damage to more than one

VIS unit is beyond the scope of these procedures. In the event of suspected damage to multiple units, the

general approach is to disconnect all units from the system, then add the units in sequence to the system

one at a time for evaluation. Following this general approach isolates individual boxes, so that in effect,

possible multiple faults are reduced to single faults that are troubleshot one at a time. Whenever

troubleshooting the VIS extensive use should be made of the Operator's Manual, TM 11-5830-263-10.

Procedures for correctly setting the FFCS and RIT can be found in Section III of this chapter.

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