3_ If the fault continues:
 - make sure that the EMER pushbutton switch on the Flight
 Attendant Panel (FAP) 120RH operates correctly.
 4_ If the fault continues:
 - check and repair the wiring between:
 EPSU 10WL pin -I and DEU-B 300RH1 connector B pin 29,
 EPSU 10WL pin -P and DEU-B 300RH1 connector B pin 31,
 EPSU 10WL pin X and DEU-B 300RH1 connector B pin 30 (Ref.
 ASM 33-51/01).
 5_ If the fault continues:
 - do the trouble shooting procedures for the FAP.

 C. Do the test given in para. 3.
 5. Close-up
________
 A. Put the aircraft back to its initial configuration.

 TASK 33-51-00-810-821

 Difference between System Test Requirements and Switch Position - All EPSUs
 1. Possible Causes
_______________
 - EMER EXIT LT switch 4WL

 - wiring

 - EMER pushbutton switch

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 33-51-00-710-010 Operational Test of the Emergency Lights via MCDU ASM 33-51/01
 3. Fault Confirmation
__________________
 A. Do the operational test of the emergency lights via MCDU (Ref. AMM TASK 33-51-00-710-010).
 4. Fault Isolation
_______________
 A. If the test gives a different maintenance message, do the trouble shooting procedure related to the maintenance message.
 B. If the operational test gives the maintenance message:
 (1) EMER EXIT LT SW(4WL)/FAP EMER PB SW:
 (a) Make sure that on the panel 25VU:
 - the EMER EXIT LT OFF light 5WL is on. 1 If the fault continues:
_
 - replace the EMER EXIT LT switch 4WL.

 - check and repair the wiring between: EMER EXIT LT switch 4WL pin 1B and pin 2C, EMER EXIT LT switch 4WL pin 1A and GND EMER EXIT LT switch 4WL pin 1C and GND (Ref. ASM 33-51/01).

 2 If the fault continues:
_
 - make sure that the EMER pushbutton switch on the Flight Attendant Panel (FAP) 120RH operates correctly.
 3 If the fault continues:
_
 - do the trouble shooting procedures for the FAP.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 106-149, 301-399, 401-499, ∞∞33-51-00∞∞∞∞∞∞∞∞∞∞Page A209
 Aug 01/05 CES C. Do the test given in para. 3.

 5. Close-up
________
 A. Put the aircraft back to its initial configuration.

 TASK 33-51-00-810-822

 Failure of EPSU 10WL
 1. Possible Causes
_______________
 - POWER SUPPLY UNIT-EMERGENCY (10WL)

 - signs and lights

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 33-51-00-710-010 Operational Test of the Emergency Lights via MCDU AMM 33-51-38-000-001 Removal of the Emergency Power-Supply Unit (EPSU) AMM 33-51-38-400-001 Installation of the Emergency Power-Supply Unit
 (EPSU)
 ASM 33-51/01
 ASM 33-51/04

 3. Fault Confirmation
__________________
 A. Do the operational test of the emergency lights via MCDU (Ref. AMM TASK 33-51-00-710-010).
 4. Fault Isolation
_______________
 A. If the test gives a different maintenance message, do the trouble shooting procedure related to the maintenance message.
 B. If the operational test gives the maintenance message:
 EPSU(10WL)FWD L:

 - replace the POWER SUPPLY UNIT-EMERGENCY (10WL) (Ref. AMM TASK 33-51-38-000-001) and (Ref. AMM TASK 33-51-38-400-001).
 (1) If the fault continues:

 - check all connected signs and lights for a short-circuit and replace if necessary (Ref. ASM 33-51/01) and (Ref. ASM 33-51/04),

 - if you find one or more defective signs and lights, replace the POWER SUPPLY UNIT-EMERGENCY (10WL) (Ref. AMM TASK 33-51-38-000-001) and (Ref. AMM TASK 33-51-38-400-001).
　
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