W DOC AIRBUS | TSM A320F

Loss of the Bus Output from the DMC 1 to the CFDIU

TASK 31-32-00-810-876-A
Loss of the Bus Output from the DMC 1 to the CFDIU

1. Possible Causes
  • CFDIU [1TW]
  • DMC-1 [1WT1]
  • wiring from the CFDIU (1TW) to the DMC 1 (1WT1)
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 31-32-00-740-003
Ground Scanning of the CFDIU
ASM 313202
AMM 31-32-34-000-001
Removal of the CFDIU
AMM 31-32-34-400-001
Installation of the CFDIU
AMM 31-63-34-000-001
Removal of the DMC
AMM 31-63-34-400-001
Installation of the DMC
3. Fault Confirmation
Subtask 31-32-00-865-124-A
A. Make sure that this(these) circuit breaker(s) is(are) closed:
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
49VUEIS/DMC1/SPLY10WT1E11
49VUEIS/DMC1/SWTG21WT1E09
Subtask 31-32-00-860-051-B
B. Not applicable.
Subtask 31-32-00-740-196-A
C. Test
Do the ground scanning of the CFDIU AMM 31-32-00-740-003.
4. Fault Isolation
Subtask 31-32-00-810-125-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message NO DMC 1 DATA:
   (1) If the fault continues:
   (2) If the fault continues:
  • do a check and repair the wiring from the CFDIU (1TW) to the DMC 1 (1WT1) from pins AA/6D, 6E to pins AB/1C, 1D ASM 313202.
Subtask 31-32-00-810-125-B ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message NO DMC 1 DATA:
   (1) If the fault continues:
   (2) If the fault continues:
  • do a check and repair the wiring from the CFDIU (1TW) to the DMC 1 (1WT1) from pins AA/6D, 6E to pins AD/13F, 13G ASM 313202.
Subtask 31-32-00-810-181-B
B. Not applicable.
5. Close-up
Subtask 31-32-00-860-052-B
A. Not applicable.
Subtask 31-32-00-740-197-A
B. Do the test given in Para. 3.B.
[Rev.8 from Aug 2018] 2026.04.04 04:29:54 UTC
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