DOC AIRBUS | TSM A320FHandset failure
TASK 23-73-00-810-917-A
Handset failure
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 23-73-00-710-322-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 23-73-00-810-652-A ** ON A/C NOT FOR ALL
Subtask 23-73-00-710-323-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:25:56 UTC
Handset failure
1. Possible Causes
- Handset 330RHxx
- DEU-B 300RHxx
- wiring
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 23-73-00-740-005 | BITE-Test of the Cabin Intercommunication Data System (CIDS) through the CFDS |
| ASM 237324 | |
| AMM 23-73-44-000-001 | Removal of the Handset/Cradle |
| AMM 23-73-44-400-001 | Installation of the Handset/Cradle |
| AMM 23-73-47-000-001 | Removal of the Decoder/Encoder Unit B (300RH) |
| AMM 23-73-47-400-001 | Installation of the Decoder/Encoder Unit B (300RH) |
Subtask 23-73-00-710-322-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 23-73-00-810-652-A ** ON A/C NOT FOR ALL
A. If the test gives a different maintenance message, do the trouble shooting procedure related to the maintenance message.
Subtask 23-73-00-810-653-A ** ON A/C NOT FOR ALL B. If the test confirms the fault:
5. Close-up- replace the related Handset 330RHxx AMM 23-73-44-000-001 and AMM 23-73-44-400-001.
- replace the related DEU-B 300RHxx AMM 23-73-47-000-001 and AMM 23-73-47-400-001.
- do a check of the wiring between the related DEU-B 300RHxx and the related Handset 330RHxx with the signal names:
AUD HI
AUD LO
MIC HI
MIC LO
PTT
DC GND
ASM 237324
Subtask 23-73-00-710-323-A ** ON A/C NOT FOR ALL
A. Do the test as given in Para. 3.A.