Table 2-1. TROUBLESHOOTING

TM 11-5820-489-20

TO 31R4-2GRA6-32

TROUBLESHOOTING

Table 2-1.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. Call light does not glow at either control unit.

Inspect lamp to see if it is improperly seated in lamp socket or burned out,

(See TM 11-5820-489-10 for procedure.)

Replace lamp if necessary.

2. Remote operator cannot hear local operator.

Step 1. Check headset/handset.

Replace if necessary.

Step 2. Check batteries of both units for proper installation.

(See TM 11-5820-489-10 for procedure).

Replace batteries if necessary.

Section V. MAINTENANCE PROCEDURES

2-11. GENERAL

Organizational Maintenance of Control Group AN/GRA-6 is limited to:

Operational Tests

q Telephone Circuit

q Telephone Line Connectors

q Push-to-Talk Operation of Radio Sets

Tools and Test Equipment

q Tool Kit, Electronic Equipment TK-101/G.

q Multi meter AN/URM-105.

2-12. OPERATIONAL TESTS

A. Telephone Circuit.

NOTE

Agreement and coordination of procedures between

two operators is necessary for the following check.

q Crank the ringing generator handle mounted on the panel of one of the control units.

Depending on the setting of the BELL-LAMP switch at the other control unit, the bell

should ring or the lamp should light.

2-11