A. If the PED power supply is not available at the seat group, do the procedure that follows (Ref. TSM 25-21-00 P.Block 301):
(1) Disconnect the connector P1 at the power converter (located under the related seat).
(2) Use the MULTIMETER - STANDARD to make sure that 115V AC is available at the connector P1.
(3) If there is 115V AC available at the connector P1, replace the power converter (Ref. AMM TASK 25-21-42-000-001) and (Ref. AMM TASK 25-21-42-400-001).
(4) If there is no 115V AC available do this procedure:
- do the check and repair or replace the seat to seat harness to the seat FWD of the related seat group.
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B. Do the test as given in para.3.
PED Supply is not available at one Seat Group
1. Possible Causes
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- MASTER CONTROL UNIT- SEAT POWER SUPPLY (55HP)
- aircraft wiring
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
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REFERENCE QTY DESIGNATION
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No specific 2 MULTIMETER - STANDARD
B. Referenced Information
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REFERENCE DESIGNATION
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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)
TSM 25-21-00 P.Block 301 PASSENGER COMPARTMENT SEATS
3. Fault Confirmation
__________________
A. Use the MULTIMETER - STANDARD and check for PED power supply at the related seat group (Ref. TSM 25-21-00 P.Block 301).
4. Fault Isolation
_______________
A. If the PED supply is not available, do the procedure that follows (Ref. TSM 25-21-00 P.Block 301):
(1) At the MCU 55HP:
- 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 55HP.
(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 55HP and the related power FDB/WDB.
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(4) If there is no 115V AC, replace the MASTER CONTROL UNIT- SEAT POWER SUPPLY (55HP) (Ref. AMM TASK 25-21-34-000-001) and (Ref. AMM TASK 25-21-34-400-001).
B. Do the test as given in para. 3.
PASSENGER COMPARTMENT SEATS - TASK SUPPORTING DATA
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1. In Seat Power Supply for Passengers Portable Electrical Devices (PEDs)______________________________________________________________________ (Ref. Fig. 301)
A. Busbar 200XP supplies 115 V AC, 400 Hz to the interface connectors of the passenger seats. Circuit breakers 50HP, 51HP and 52HP protect the circuits. The busbar 602PP supplies 28 V DC to the master control unit 55HP. The circuit breakers are located on the panel 2000VU. The in seat power supply unit (converter) supplies the electrical outlets of the passenger seat with 110 V AC, 60Hz.
- You can connect PED, for such as portable computers or music players to these outlets
- The crew can at any time, remove the electrical power supply from the electrical outlets through a single override switch.
B. Supporting Data (Ref. Fig. 302) The schematic diagrams that follow show the PEDs System as a number of sub systems. These diagrams give the data necessary to support the related trouble shooting procedures.
PED Power Supply - Component Location
Figure 301
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