W DOC AIRBUS | TSM A320F

Loss of the ARINC 629 link from the CAPT DU's to the DMC1

TASK 31-63-82-810-839-A
Loss of the ARINC 629 link from the CAPT DU's to the DMC1

1. Possible Causes
  • DMC-1 [1WT1]
  • wiring
  • C/B-EIS/DMC1/SPLY [10WT1]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 31-60-00-860-001
EIS Start Procedure
AMM 31-60-00-860-002
EIS Stop Procedure
ASM 316201
AMM 31-63-34-000-001
Removal of the DMC
AMM 31-63-34-400-001
Installation of the DMC
3. Fault Confirmation
Subtask 31-63-82-860-098-A ** ON A/C NOT FOR ALL
A. Job Set-up
   (1) Do the EIS start procedure AMM 31-60-00-860-001.
4. Fault Isolation
Subtask 31-63-82-810-119-A ** ON A/C NOT FOR ALL
A. Make sure that:
  • the INVALID DATA message is shown on the CAPT PFD DU and on the CAPT ND DU
  • the ECAM warning EIS DMC 1 FAULT is shown on the upper ECAM display
   (1) Replace the DMC-1 [1WT1] AMM 31-63-34-000-001 and AMM 31-63-34-400-001.
   (2) If the fault continues:
  • Make sure that there is 115VAC on the pin AC-2 of the DMC1(1WT1)
     (a) If there is no 115VAC:
  • check and repair the wiring from the DMC1(1WT1) pin AC-2 to the EIS DMC1 SPLY (10WT1)- circuit breaker
       1 if there is continuity:
     (b) If there is 115VAC:
  • Make sure that there is a ground signal at pin AC-7 of the DMC1(1WT1)
       1 if there is no ground signal:
  • repair the wiring from the DMC1 (1WT1) pin AC-7 to the ground terminal ASM 316201.
Subtask 31-63-82-860-099-A ** ON A/C NOT FOR ALL
B. Do the EIS stop procedure AMM 31-60-00-860-002.
[Rev.8 from Aug 2018] 2026.04.04 04:31:16 UTC
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