Loss of the Audio Signal from the ADF Receiver 1

TASK 34-53-00-810-817-A
Loss of the Audio Signal from the ADF Receiver 1

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 23-51-34-000-001	Removal of the Audio Management Unit (AMU) (1RN)
AMM 23-51-34-400-001	Installation of the Audio Management Unit (AMU) (1RN)
AMM 34-53-00-710-002	Operational Test of the ADF
ASM 345301
AMM 34-53-31-000-002	Removal of the ADF Receiver
AMM 34-53-31-400-002	Installation of the ADF Receiver

3. Fault Confirmation
Subtask 34-53-00-710-050-A

A. Test
(1) Do the operational test of the ADF AMM 34-53-00-710-002.

4. Fault Isolation
Subtask 34-53-00-810-068-A

A. If there is no audio signal on the loud speakers during the test, when the ADF 1 data are shown on the ND:

(1) If the fault continues:

(a) If the fault continues:

do a check and repair the wiring of the ADF 1 AUDIO bus from the AMU (1RN) to the ADF receiver 1 (2RP1) ASM 345301.

Subtask 34-53-00-710-051-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:33:27 UTC