Loss of the HF 1 System

TASK 23-11-00-810-810-A
Loss of the HF 1 System

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 23-11-00-810-801-A	Failure of the HF 1 Transceiver
TSM TASK 23-11-00-810-803-A	Loss of the HF 1 Communication
AMM 23-11-00-740-001	BITE Test of the HF System
AMM 23-11-36-000-001	Removal of the HF Antenna Coupler
AMM 23-11-36-400-001	Installation of the HF Antenna Coupler

3. Fault Confirmation
Subtask 23-11-00-740-064-A

A. Test
(1) Do the BITE test of the HF system AMM 23-11-00-740-001.

NOTE: Do this test for the HF 1 only.

4. Fault Isolation
Subtask 23-11-00-810-063-A ** ON A/C NOT FOR ALL

A. If the test gives this maintenance message:
(1) HF 1 TRANSCEIVER:

(2) CHECK HF 1 ANTENNA CIRCUIT:

Subtask 23-11-00-810-063-E ** ON A/C NOT FOR ALL

A. If the test gives this maintenance message:
(1) HF1 (3RE1):

(2) HF1 (3RE1) /COAX:

Subtask 23-11-00-810-064-A

B. If the test gives no maintenance message:

[Rev.8 from Aug 2018] 2026.04.04 04:25:35 UTC