(2) If the fault continues:

 - do a check for a short to ground and repair the wiring if necessary (Ref. ASM 33-51/01) and (Ref. ASM 33-51/04): from EPSU (10WL) pin E to the connector(s) of the related signs and lights,
 「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 A211
 Aug 01/05 CES

 from EPSU (10WL) pin F to the connector(s) of the related signs and
 lights,
 from EPSU (10WL) pin G to the connector(s) of the related signs and
 lights,
 from EPSU (10WL) pin H to the connector(s) of the related signs and
 lights,
 from EPSU (10WL) pin J to the connector(s) of the related signs and
 lights,
 from EPSU (10WL) pin N to the connector(s) of the related signs and
 lights,
 from EPSU (10WL) pin R to the connector(s) of the related signs and
 lights,
 from EPSU (10WL) pin T to the connector(s) of the related signs and
 lights,
 from EPSU (10WL) pin -B to the connector(s) of the related signs
 and lights,
 from EPSU (10WL) pin -C to the connector(s) of the related signs
 and lights,
 from EPSU (10WL) pin -H to the connector(s) of the related signs
 and lights,
 from EPSU (10WL) pin -J to the connector(s) of the related signs
 and lights,

 - if you find a short to ground in the wiring, replace the POWER SUPPLY UNIT-EMERGENCY (10WL) (Ref. AMM TASK 33-51-38-000-001) and (Ref. AMM TASK 33-51-38-400-001).
 (3) If the fault continues:
 - do a check and repair the wiring if necessary (Ref. ASM 33-51/01): from EPSU (10WL) pin -I to DEU-B (300RH1) pin B/29, from EPSU (10WL) pin -P to DEU-B (300RH1) pin B/31, from EPSU (10WL) pin X to DEU-B (300RH1) pin B/30, from EPSU (10WL) pin L to GND, from EPSU (10WL) pin M to GND, from EPSU (10WL) pin U to GND, from EPSU (10WL) pin -R to GND, from EPSU (10WL) pin -M to GND.
 C. Do the test given in para. 3.
 5. Close-up
________
 A. Put the aircraft back to its initial configuration.

 TASK 33-51-00-810-823

 Failure of the Exit Signs controlled by EPSU 10WL
 1. Possible Causes
_______________
 - EMERGENCY EXIT SIGN (40WL)

 - EMERGENCY EXIT SIGN (41WL)

 - EMERGENCY EXIT LOCATION SIGN (50WL)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 33-51-00-710-007 Operational Test of the Emergency Lighting in the
 Cabin by 'LIGHT EMER' Pushbutton Switch AMM 33-51-00-710-010 Operational Test of the Emergency Lights via MCDU AMM 33-51-16-000-001 Removal of the Emergency Exit Sign AMM 33-51-16-400-001 Installation of the Emergency Exit Sign AMM 33-51-17-000-001 Removal of the Emergency Exit Location-Sign AMM 33-51-17-400-001 Installation of the Emergency Exit Location-Sign ASM 33-51/02
 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) EXIT SIGNS/EPSU(10WL)FWD L:
 - do the Operational Test of the Emergency Lighting in the Cabin by Pushbutton Switch (Ref. AMM TASK 33-51-00-710-007).

 - during the test monitor the EMERGENCY EXIT SIGN (40WL), EMERGENCY EXIT SIGN (41WL) and the EMERGENCY EXIT LOCATION SIGN (50WL) in the FWD section of the cabin.

 - replace the EMERGENCY EXIT SIGN (40WL) (Ref. AMM TASK 33-51-16-000-001) and (Ref. AMM TASK 33-51-16-400-001) if not illuminated.

 - replace the EMERGENCY EXIT SIGN (41WL) (Ref. AMM TASK 33-51-16-000-001) and (Ref. AMM TASK 33-51-16-400-001) if not illuminated.

 「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 A213
 Aug 01/05 CES

 - replace the EMERGENCY EXIT LOCATION SIGN (50WL) (Ref. AMM TASK 33-51-17-000-001) and (Ref. AMM TASK 33-51-17-400-001) if not illuminated.
 (a) If the fault continues:
 - do a check and repair the wiring between: EPSU pin N and the EMERGENCY EXIT SIGN (40WL) pin 3. EPSU pin N and the EMERGENCY EXIT LOCATION SIGN (50WL) pin 3. EPSU pin R and the EMERGENCY EXIT SIGN (41WL) pin 3. EMERGENCY EXIT SIGN (40WL) pin 1 and GND. EMERGENCY EXIT LOCATION SIGN (50WL) pin 1 and GND. EMERGENCY EXIT SIGN (41WL) pin 1 and GND (Ref. ASM 33-51/02).
　
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