DOC AIRBUS | TSM A320FPCU unit fault
TASK 23-73-00-810-971-A
PCU unit fault
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 23-73-00-710-392-A 4. Fault Isolation
Subtask 23-73-00-810-764-A
Subtask 23-73-00-710-393-A
[Rev.8 from Aug 2018]
2026.04.04 04:38:58 UTC
PCU unit fault
1. Possible Causes
- PSU
- 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 237314 | |
| AMM 25-25-11-000-001 | Removal of the Filler Panels |
| AMM 25-25-11-400-001 | Installation of the Filler Panels |
Subtask 23-73-00-710-392-A 4. Fault Isolation
Subtask 23-73-00-810-764-A
A. If the test gives a different maintenance message, do the trouble shooting procedure related to the maintenance message.
Subtask 23-73-00-810-765-A B. If the test confirms the fault:
5. Close-up- replace the PSU related to the fault message
AMM 25-25-11-000-001 and AMM 25-25-11-400-001.
- do a check and repair the wiring between:
PSU and the related DEU-A 200RHxx with the signal name 28VDC IN/OUT,
PSU and the related DEU-A 200RHxx with the signal name DC GND IN,
PSU and the related DEU-A 200RHxx with the signal name LVDS P,
PSU and the related DEU-A 200RHxx with the signal name LVDS N,
ASM 237314
Subtask 23-73-00-710-393-A
A. Do the test given in para. 3.A.