TM-9-2350-273-BD

M48/M60 SERIES TANK, COMBAT FULL-TRACKED 105-MM GUN

TECHNICAL MANUAL; OPERATORS, ORGANIZATIONAL, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE; BATTLEFIELD DAMAGE ASSESSMENT AND REPAIR

TM-9-2350-273-BD - Page 168 of 288

TM 9-2350-273-BD

COMMUNICATIONS

SYSTEM

Detailed Assessment Steps (Cont'd)

3.

Check that the cables are connected properly and are in good condition.

a. If a defective cable is found, follow the procedures listed below:

(1) Replace the defective cable in accordance with standard repair

procedures.

(2) Replace the defective cables with an acceptable replacement cable

listed in para 11-34.

(3) Repair the cable in accordance with the procedures in para. 11-30 or

TM 9-2350-276-BD.

b.

If the problem still exists, go to step 4.

4.

Check that the aux receiver tuning controls are set correctly by attempting to

receive a signal from a transmitter operating on a different frequency. Retune the aux

receiver to the assigned frequency.

a.

If the problem no longer exists, no further actions are necessary.

b.

If the problem still exists, go to step 5.

5.

Replace the aux receiver with a known operational aux receiver.

a.

If communication has been restored, repair the receiver using standard

maintenance procedures.

b.

If the problem still exists, follow the troubleshooting procedures in

TM 11-5820-401-12.

11-13. OBSERVABLE SYSMPTOM: THE KY-57 (KY-38) SPEECH SECURITY SYSTEM

DOES NOT HAVE POWER

Detailed Assessment Steps:

Make sure the circuit breaker has not been tripped by turning off the KY-57

(KY-38) power switch and then turning it back to ON.

Make sure the KY-57 (KY-38) is securely mounted by loosening the clamps and

moving the KY-57 (KY-38) forward. Line up the guide pins and slide the KY-57 (KY-38)

firmly back into the mount. Tighten the clamps.

3.

Check that cables are connected properly.

11-13