W DOC AIRBUS | TSM A320F

ACP - No indication on one Area Call Panel

TASK 23-73-00-810-870-A
ACP - No indication on one Area Call Panel

1. Possible Causes
  • lamp
  • DEU-B 300RH
  • ACP 340RHx
  • wiring
  • ACP 340RHxx
  • DEU-B 300RHxx
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 23-73-00-710-035
Operational Test of the Cabin LED lamps through the MCDU
AMM 23-73-00-740-005
BITE-Test of the Cabin Intercommunication Data System (CIDS) through the CFDS
AMM 23-73-11-000-001
Removal of the Area Call Panel
AMM 23-73-11-400-001
Installation of the Area Call Panel
ASM 237324
ASM 237327
AMM 23-73-47-000-001
Removal of the Decoder/Encoder Unit B (300RH)
AMM 23-73-47-400-001
Installation of the Decoder/Encoder Unit B (300RH)
3. Fault Confirmation
Subtask 23-73-00-710-184-A ** ON A/C NOT FOR ALL
A. Test
   (1) Do the CIDS BITE test through the CFDS AMM 23-73-00-740-005.
   (2) Do the CIDS1/AREA CALL PANELS test through the CFDS.
Subtask 23-73-00-710-184-B ** ON A/C NOT FOR ALL
A. Test
   (1) Do the CIDS Interface and Power-Up Test via the CFDS AMM 23-73-00-740-005.
   (2) Do the Operational Test of the Cabin LED Lamps via the CFDS AMM 23-73-00-710-035.
4. Fault Isolation
Subtask 23-73-00-810-432-A
A. If the test gives a different maintenance message, do the trouble shooting procedure related to the maintenance message.
Subtask 23-73-00-810-433-A ** ON A/C NOT FOR ALL
B. If the CIDS BITE test result is no fault message, but there is a fault in the related ACP:
  • replace the related lamp .
   (1) If the fault continues:
  • operate the ACPs through the CFDS1/AREA CALL PANELS test,
  • do a check for 28 VDC at the related DEU-B 300RHx connector B1,B2,B3,B4,B9, B10,B11 and B12 ASM 237324 and ASM 237327.
     (a) If there is no 28 VDC at one connector:
     (b) If there is 28 VDC at every connector:
       1 If the fault continues:
  • do a check and repair the wiring between the:
    DEU-B 300RHx connector B/1(9) and ACP 340RHx pin 1,
    DEU-B 300RHx connector B/2(10) and ACP 340RHx pin 2,
    DEU-B 300RHx connector B/3(11) and ACP 340RHx pin 3,
    DEU-B 300RHx connector B/4(12) and ACP 340RHx pin 4,
    ACP 340RHx pin 5 and GND ASM 237324 and ASM 237327.
Subtask 23-73-00-810-433-C ** ON A/C NOT FOR ALL
B. If the CIDS Interface and Power-Up Test result is no fault message, but there is a fault in the related ACP:
   (1) If the fault continues:
  • do a check for 28 VDC at the related DEU-B 300RHxx connector B1,B2,B3,B4,B9, B10,B11 and B12 ASM 237324 and ASM 237327.
     (a) If there is no 28 VDC at one connector:
     (b) If there is 28 VDC at every connector:
  • do a check and repair the wiring between the:
    DEU-B 300RHxx connector B/1(9) and ACP 340RHxx pin 1,
    DEU-B 300RHxx connector B/2(10) and ACP 340RHxx pin 2,
    DEU-B 300RHxx connector B/3(11) and ACP 340RHxx pin 3,
    DEU-B 300RHxx connector B/4(12) and ACP 340RHxx pin 4,
    ACP 340RHxx pin 5 and GND ASM 237324 and ASM 237327.
Subtask 23-73-00-710-190-A
C. Do the test given in Para. 3.A.
[Rev.8 from Aug 2018] 2026.04.04 04:25:54 UTC
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