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 169 of 288

TM 9-2350-273-BD

COMMUNICATIONS SYSTEM

Detailed Assessment Steps (Cont'd)

4.

Check cables for damaged or torn insulation.

NOTE

Do not attempt to repair any cables. Repair might breach security.

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 cable with an acceptable replacement cable

listed in para 11-34.

b.

If the problem still exists, go to step 5.

5.

Replace KY-57 (KY-38) with a known operational KY-57 (KY-38).

a.

If the problem no longer exists, repair the KY-57 (KY-38) using standard

maintenance procedures.

b. If the problem still exists, refer to the troubleshooting procedures in

TM 11-5810-256-OP-4.

11-14. OBSERVABLE SYMPTOM: UNABLE TO

Detailed Assessment Steps:

1.

Check the KY-57 (KY-38) system by

(plain text) mode with a distant station.

COMMUNICATE USING THE KY-57

attempting to communicate in the PT

a.

If PT communication is not possible, refer to paragraph 11-5.

b.

If PT communication is possible, go to step 2.

2.

Make sure the proper code is being used by zeroing the KY-57 (KY-38) and

then resetting it with the ‘proper

Operating Instruction (CEOI)).

3.

Attempt to communicate

proper code settings are being used.

11-14

code.

(See applicable Communication Electronic

with a different distant station to make sure the