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