Section V. SYSTEM TROUBLESHOOTING WITH ERROR SHOWN ON ALPHANUMERIC DISPLAY

TM-11-5830-263-20&P

SECTION V

SYSTEM TROUBLESHOOTING WITH ERROR SHOWN ON ALPHANUMERIC

DISPLAY

CAUTION

BE SURE TO REMOVE POWER FROM THE MCS BEFORE REMOVING OR

REPLACING COMPONENTS AND/OR CABLES.

2.9.

TROUBLESHOOTING WITH ALPHANUMERIC ERROR DISPLAY

a. General

The procedures in step b below troubleshoot faulty equipment in VIS with an error message (s)

displayed on the MCS alphanumeric display. They apply whether trouble is in radio or intercom

communication. For vehicles in a ring configuration, refer to Table 2-4. For vehicles in a two-

branch configuration, refer to Table 2-5.

NOTE

Ensure that Para. 2.3. "Equipment Inspections/Checks/Guidelines" has been followed

prior to beginning any troubleshooting procedures using Tables 2-4 or 2-5.

b. Troubleshooting the system

Perform the following steps in sequence to ensure accurate troubleshooting of the equipment.

1. Determine whether the vehicle has a ring or two-branch configuration.

2. Go to appropriate Table, 2-4 or 2-5.

3. Examine the "MCS Alphanumeric Display" column to find the error message that matches

the one on the MCS display, while at the same time examine the "Error Description"

column to correctly identify the corresponding problem.

4. Perform the action required as stated in the corresponding "Corrective Measures"

column.

NOTE

Reference to "substitution of a VIS box with a known good one" in the troubleshooting

flowcharts refers to properly configured (Section III) and operationally verified

replacement equipment.