A. If the ON legend in the PED POWER switch does not come on, do the procedure that follows (Ref. TSM 25-21-00 P.Block 301):
(1) Remove the ON bezel from the 56HP
(2) Use the MULTIMETER - STANDARD to do a check for continuity of the ON legend lamp (Ref. ASM 25-21/00).
(a) If the lamp is unserviceable:
- replace the defective lamp.
一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一 R EFF : 301-399, 401-499, ∞∞25-21-00∞∞∞∞∞∞∞∞∞∞Page 201
Aug 01/05 CES
(b) If the lamp is serviceable, proceed as follows:
- disconnect the connector A from the connector 7434VC at the circuit breaker (CB) panel 2000VU
- use the MULTIMETER - STANDARD to do a check of the Aircraft wiring: between the switch 56HP Pin A/7 at the PED power control station and the connector 7434VC at the CB panel 2000VU between the CB panel connector A and the related terminals of the CB (53HP).
- repair and replace as necessary.
(c) If there is no fault in the aircraft wiring:
- replace the PED (53HP).
B. Do the test as given in Para. 3.
The PED Power supply is available during the operational test of the passenger emergency oxygen system
1. Possible Causes
_______________
- MASTER CONTROL UNIT- SEAT POWER SUPPLY (55HP)
- Aircraft Wiring
- Automatic Activation of the Oxygen System
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific 1 MULTIMETER - STANDARD
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
35-23-00-810-801 Automatic System Activation Fault AMM 25-21-00-710-002 Operational Test of the In-Seat Power-Supply System
(PED Power Supply)
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)
ASM 25-21/00
3. Fault Confirmation
__________________
A. Do the operational test of PED supply system (Ref. AMM TASK 25-21-00-710-002).
4. Fault Isolation
_______________
A. If the results of the operational test are unsatisfactory, do the procedure that follows:
(1) Disconnect the connector F from the MCU J6.
(2) Use the MULTIMETER - STANDARD to do a check for continuity and for a short circuit in the Aircraft Wiring (Ref. ASM 25-21/00) between:
- the MCU connector F and the diode module 1805VD pin 26. This is through: . the connector 128VC pin 7 . the connector 156VC pin D.
一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一 R EFF : 301-399, 401-499, ∞∞25-21-00∞∞∞∞∞∞∞∞∞∞Page 203
Aug 01/05 CES (a) If there is a fault in the aircraft wiring:
- repair and replace as necessary
- connect the connector F to the MCU connector J6
- do the test as given in Para. 3.
(3) If there is no fault in the aircraft wiring, do the procedure that follows:
(a) Troubleshoot the Automatic Activation of the Oxygen System (Ref. TASK 35-23-00-810-801)
(b) If the fault continues, 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.
The On Lamp of the PED PWR SW on Cockpit Panel 56VU does not come on
1. Possible Causes
_______________
- lamp
- aircraft wiring
- CB/50HP
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------
REFERENCE QTY DESIGNATION
-------------------------------------------------------------------------------
No specific 1 MULTIMETER - STANDARD
B. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
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