W DOC AIRBUS | TSM A320F

Internal Failure of the DLRB

TASK 31-38-00-810-811-A
Internal Failure of the DLRB

1. Possible Causes
  • ROUTING BOX-DATA LOADING [102TD]
  • SELECTOR-DATA LOADING [101TD]
  • wiring
  • CFDIU [1TW]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 31-38-00-740-001
BITE Test of the Data Loading Routing Box (DLRB)
ASM 313801
AMM 31-38-21-000-001
Removal of the Data Loading Selector
AMM 31-38-21-400-001
Installation of the Data Loading Selector
AMM 31-38-34-000-001
Removal of the Data Loading Routing Box (DLRB)
AMM 31-38-34-400-001
Installation of the Data Loading Routing Box (DLRB)
3. Fault Confirmation
Subtask 31-38-00-740-054-B ** ON A/C NOT FOR ALL
A. Do the BITE Test of the DLRB AMM 31-38-00-740-001.
4. Fault Isolation
Subtask 31-38-00-810-060-B ** ON A/C NOT FOR ALL
A. If the test gives the message DLRB(102TD)/DLS(101TD):
   (1) If the fault continues:
     (a) If the fault continues:
  • Do a check the aircraft wiring between the SELECTOR-DATA LOADING [101TD] and ROUTING BOX-DATA LOADING [102TD] ASM 313801:
    pin A/E (101TD) to pin D/3 (102TD).
    pin A/A (101TD) to pin D/5 (102TD).
    pin A/B (101TD) to pin D/6 (102TD).
    pin A/D (101TD) to pin D/4 (102TD).
    pin A/J (101TD) to pin D/20 (102TD).
    pin A/C (101TD) to pin D/36 (102TD).
    pin A/G (101TD) to pin D/21 (102TD).
    pin A/K (101TD) to pin D/37 (102TD).
       1 If there is no continuity:
  • repair the wiring.
       2 If there is continuity:
  • Do a check and repair the aircraft wiring between the ROUTING BOX-DATA LOADING [102TD] and CFDIU [1TW] ASM 313801:
    pin B/3 (102TD) to pin AA/7A (1TW).
    pin A/44 (102TD) to pin AB/11K (1TW).
    pin B/4 (102TD) to pin AA/9A (1TW).
Subtask 31-38-00-740-055-B ** ON A/C NOT FOR ALL
B. Do the test given in Para. 3.
[Rev.8 from Aug 2018] 2026.04.04 04:30:08 UTC
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