W DOC AIRBUS | TSM A320F

PED Supply is not available at one Seat Group

TASK 25-21-00-810-867-A
PED Supply is not available at one Seat Group

1. Possible Causes
  • aircraft wiring
  • MASTER CONTROL UNIT - SEAT POWER SUPPLY [55HP1]
  • MASTER CONTROL UNIT - SEAT POWER SUPPLY [55HP2]
  • wiring
  • terminal blocks VT-type
  • seat-to-seat cable
  • advance power converter (500HP*)
  • in-seat power-supply unit (150HP*)
  • in-seat power-supply unit (151HP*)
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
2
MULTIMETER - STANDARD
 B. Referenced Information
REFERENCE
DESIGNATION
TSM TASK 25-21-00-810-870-A
Ground Fault Interupt detected
AMM 25-21-00-740-001
BITE Test of the Master Control Unit (MCU)
AMM 25-21-34-000-001
Removal of the Master Control Unit (MCU)
AMM 25-21-34-400-001
Installation of the Master Control Unit (MCU)
AMM 25-21-36-000-802
Removal of the Advanced Power Converter
AMM 25-21-36-400-802
Installation of the Advanced Power Converter
AMM 25-21-38-000-001
Removal of the In-seat Power-Supply Unit
AMM 25-21-38-400-001
Installation of the In-seat Power-Supply Unit
AMM 25-21-61-000-001
Removal of the Cable - Seat to Seat
AMM 25-21-61-400-001
Installation of the Cable - Seat to Seat
3. Fault Confirmation
Subtask 25-21-00-710-098-A ** ON A/C NOT FOR ALL
A. Use the MULTIMETER - STANDARD and check for PED power supply at the related seat group.
Subtask 25-21-00-710-098-B ** ON A/C NOT FOR ALL
A. Do the BITE Test of the related Master Control Unit (MCU) AMM 25-21-00-740-001
4. Fault Isolation
Subtask 25-21-00-810-241-B ** ON A/C NOT FOR ALL
A. If the PED supply is not available, do the procedure that follows:
   (1) At the MCU 55HP1:
- disconnect the applicable connector of the related seat group.
   (2) Use the MULTIMETER - STANDARD to check that 115V AC is available at the applicable power outlet of the MCU 55HP1.
   (3) If there is 115V AC available:
  • Use the MULTIMETER - STANDARD to do a check for continuity and repair as necessary the aircraft wiring between the MCU 55HP1 and the related power FDB.
   (4) If there is no 115V AC, replace the MASTER CONTROL UNIT - SEAT POWER SUPPLY [55HP1] AMM 25-21-34-000-001 and AMM 25-21-34-400-001.
   (5) At the MCU 55HP2:
- disconnect the applicable connector of the related seat group.
   (6) Use the MULTIMETER - STANDARD to check that 115V AC is available at the applicable power outlet of the MCU 55HP2.
   (7) If there is 115V AC available:
  • Use the MULTIMETER - STANDARD to do a check for continuity and repair as necessary the aircraft wiring between the MCU 55HP2 and the related power FDB.
   (8) If there is no 115V AC, replace the MASTER CONTROL UNIT - SEAT POWER SUPPLY [55HP2] AMM 25-21-34-000-001 and AMM 25-21-34-400-001.
Subtask 25-21-00-810-241-T ** ON A/C NOT FOR ALL
A. If the test confirms the fault, refer to the MCU indication panel:
   (1) If a PORT BITE LED flashes GREEN or is OFF:
   (2) If a PORT POWER STATE LED is OFF:
   (3) If all indicators are ON:
     (a) Do a check and repair the wiring between the MCU and the related Power Wall Disconnect-Box (PWDB).
     (b) Do a careful check of the terminal blocks VT-type for correct condition and correct connection.
     (c) Make sure that all terminal ends and the nuts are correctly installed and repair if necessary.
     (d) If the fault continues:
     (e) If the fault continues:
     (f) If the fault continues:
     (g) If the fault continues:
Subtask 25-21-00-810-241-AA ** ON A/C NOT FOR ALL
DELETED
Subtask 25-21-00-710-099-A ** ON A/C NOT FOR ALL
B. Do the test given in Para. 3.
[Rev.8 from Aug 2018] 2026.04.04 04:27:01 UTC
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