INTERMEDIATE PREVENTIVE MAINTENANCE CHECKS AND SERVICES-continued

TM 11-5820-670-12

ORGANIZATIONAL PREVENTIVE MAINTENANCE CHECKS AND SERVICES. (CONT)

3-6.

INTERMEDIATE PREVENTIVE MAINTENANCE CHECKS AND SERVICES (CONT)

ITEM

TO BE

PROCEDURE

INSPECTED

NO.

Perform operational check (para 3-12) and check TEST METER

Receiver-

for proper operation and damage. If broken, forward to next

higher level of maintenance for replacement.

Tuning

Tune radio set to the frequency of a local fm station. A channel-

changing tone should be heard in the headset while radio set is

tuning. When the tone stops, radio set is tuned. If radio set does

not tune, refer to troubleshooting procedures (para 3-9) item 5.

Two-Way

Establish two-way voice communications (para 2-4). if com-

munications cannot be established, refer to troubleshooting pro-

cedures (para 3-9) items 11 through 15.

NOTE

Perform the following procedure only when two radio sets are

installed in the aircraft.

Retransmission

Operate two radio sets for retransmit operation (para 2-4). If

retransmission cannot be accomplished, refer to troubleshoot-

ing procedures (para 3-9) items 16 and 17.

NOTE

Perform the following procedure only when aircraft is

equipped for homing operations.

Homing

Operate radio set for homing operation (para 2-4). If homing

cannot be accomplished, refer to troubleshooting procedures

3-12