DOC AIRBUS | TSM A320FDMU Receives No Data from the PC 1 (ACSC 1)
TASK 31-36-00-810-927-A
DMU Receives No Data from the PC 1 (ACSC 1)
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
3. Fault Confirmation
Subtask 31-36-00-740-217-A ** ON A/C NOT FOR ALL
Subtask 31-36-00-810-141-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:30:07 UTC
DMU Receives No Data from the PC 1 (ACSC 1)
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 21-61-00-710-001 | Operational Test of the Pack Temperature-Control System |
| AMM 31-36-00-710-001 | Test of the DMU |
| AMM 31-36-34-000-001 | Removal of the Data Management Unit (DMU) |
| AMM 31-36-34-400-001 | Installation of the Data Management Unit (DMU) |
| ASM 313701 |
Subtask 31-36-00-740-217-A ** ON A/C NOT FOR ALL
A. Do the DMU (1TV) fault monitoring test AMM 31-36-00-710-001.
4. Fault IsolationNOTE: Make sure that the circuit breakers 1TV on the panel 121VU and 1HH, 2HH, 3HH and 4HH on the panel 122VU are closed during the test.
Subtask 31-36-00-810-141-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message:
(a) If the test gives a different maintenance message, you can find the related trouble shooting procedure in the applicable Page Block 201.
(2) If the fault continues:
Subtask 31-36-00-740-218-A ** ON A/C NOT FOR ALL - ACSC 1 (47HH) / DMU (1TV)
(a) If the test gives a different maintenance message, you can find the related trouble shooting procedure in the applicable Page Block 201.
(2) If the fault continues:
- do a check and repair the wiring from the
[47HH] to the DMU [1TV] ASM 313701:
ACSC 1 Connector AB/11B to DMU Connector AA/2C
ACSC 1 Connector AB/11C to DMU Connector AA/2D.
- replace the DMU (1TV) AMM 31-36-34-000-001 and AMM 31-36-34-400-001.
B. Do the test given in Para. 3.