W DOC AIRBUS | TSM A320F

Lavatory Lighting - In one Lavatory the Lavatory Light does not come on

TASK 33-24-00-810-801-A
Lavatory Lighting - In one Lavatory the Lavatory Light does not come on

1. Possible Causes
  • auxiliary/mirror lavatory light
  • ballast unit
  • wiring
  • accent ceiling light
  • accent mirror light
  • accent washtable light
  • floor light
  • CLEDU
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 33-24-00-710-001
Operational Test of the Lavatory Lighting LQ
ASM 332401
AMM 33-24-11-000-006
Removal of the Ballast Unit and Lampholder
AMM 33-24-11-000-802
Removal of the Cabin LED Unit (CLEDU)
AMM 33-24-11-400-006
Installation of the Ballast Unit and Lampholder
AMM 33-24-11-400-802
Installation of the Cabin LED Unit (CLEDU)
AMM 33-24-12-000-002
Removal of the Auxiliary/Mirror Lavatory Light
AMM 33-24-12-000-803
Removal of the Accent Ceiling Light
AMM 33-24-12-000-804
Removal of the Accent Mirror Light
AMM 33-24-12-000-805
Removal of the Accent Washtable Light
AMM 33-24-12-000-806
Removal of the Floor Light
AMM 33-24-12-400-002
Installation of the Auxiliary/Mirror Lavatory Light
AMM 33-24-12-400-803
Installation of the Accent Ceiling Light
AMM 33-24-12-400-804
Installation of the Accent Mirror Light
AMM 33-24-12-400-805
Installation of the Accent Washtable Light
AMM 33-24-12-400-806
Installation of the Floor Light
3. Fault Confirmation
Subtask 33-24-00-710-050-A
A. Do the operational test of the Lavatory Lighting AMM 33-24-00-710-001.
4. Fault Isolation
Subtask 33-24-00-810-050-C ** ON A/C NOT FOR ALL
A. If the test confirms the fault:
   (1) Replace the related auxiliary/mirror lavatory light AMM 33-24-12-000-002 and AMM 33-24-12-400-002.
   (2) If the fault continues:
     (a) Do a check for 115 VAC at the related ballast unit pin C.
       1 If there is approximately 115 VAC:
         a Replace the related ballast unit AMM 33-24-11-000-006 and AMM 33-24-11-400-006.
       2 If there is no 115 VAC:
         a Do a check and repair the wiring between the related:
  • Ballast unit pin C and lavatory lighting relay 2LQ connector A/A1
  • Ballast unit pin A and GND
  • Ballast unit pin B and GND ASM 332401.
Subtask 33-24-00-810-050-D ** ON A/C NOT FOR ALL
A. If the test confirms the fault:
   (1) Replace the related auxiliary/mirror lavatory light AMM 33-24-12-000-002 and AMM 33-24-12-400-002.
   (2) If the fault continues:
     (a) Do a check for 115 VAC at the related ballast unit pin C.
       1 If there is approximately 115 VAC:
         a Replace the related ballast unit AMM 33-24-11-000-006 and AMM 33-24-11-400-006.
       2 If there is no 115 VAC:
         a Do a check and repair the wiring between the related:
  • Ballast unit pin 7 and circuit breaker 1LQ
  • Ballast unit pin 4 and GND
  • Ballast unit pin 8 and GND ASM 332401.
Subtask 33-24-00-810-050-F ** ON A/C NOT FOR ALL
A. If the test confirms the fault:
   (1) Replace the related auxiliary/mirror lavatory light AMM 33-24-12-000-002 AMM 33-24-12-400-002.
   (2) If the fault continues:
     (a) Replace the related accent ceiling light AMM 33-24-12-000-803 AMM 33-24-12-400-803.
   (3) If the fault continues:
     (a) Replace the related accent mirror light AMM 33-24-12-000-804 AMM 33-24-12-400-804.
   (4) If the fault continues:
     (a) Replace the related accent washtable light AMM 33-24-12-000-805 AMM 33-24-12-400-805.
   (5) If the fault continues:
     (a) Replace the related floor light (if installed) AMM 33-24-12-000-806 AMM 33-24-12-400-806.
   (6) If the fault continues:
     (a) Do a check for 115 VAC at the related ballast unit pin 7.
       1 If there is approximately 115 VAC:
         a Replace the related ballast unit AMM 33-24-11-000-006 and AMM 33-24-11-400-006.
       2 If there is no 115 VAC:
         a Do a check and repair the wiring between the related:
  • Ballast unit pin 7 and circuit breaker 1LQ
  • Ballast unit pin 4 and GND
  • Ballast unit pin 8 and GND ASM 332401.
     (b) Do a check for 115 VAC at the related CLEDU pin 7.
       1 If there is approximately 115 VAC:
         a Replace the related CLEDU AMM 33-24-11-000-802 and AMM 33-24-11-400-802.
       2 If there is no 115 VAC:
         a Do a check and repair the wiring between the related:
  • CLEDU pin 7 and circuit breaker 1LQ
  • CLEDU pin 4 and GND
  • CLEDU pin 8 and GND ASM 332401.
Subtask 33-24-00-810-050-I ** ON A/C NOT FOR ALL
A. If the test confirms the fault:
   (1) Replace the related auxiliary/mirror lavatory light AMM 33-24-12-000-002 AMM 33-24-12-400-002.
   (2) If the fault continues:
     (a) Replace the related accent ceiling light AMM 33-24-12-000-803 AMM 33-24-12-400-803.
   (3) If the fault continues:
     (a) Replace the related accent mirror light AMM 33-24-12-000-804 AMM 33-24-12-400-804.
   (4) If the fault continues:
     (a) Replace the related accent washtable light AMM 33-24-12-000-805 AMM 33-24-12-400-805.
   (5) If the fault continues:
     (a) Replace the related floor light (if installed) AMM 33-24-12-000-806 AMM 33-24-12-400-806.
   (6) If the fault continues:
     (a) Do a check for 115 VAC at the related ballast unit pin 7.
       1 If there is approximately 115 VAC:
         a Replace the related ballast unit AMM 33-24-11-000-006 and AMM 33-24-11-400-006.
       2 If there is no 115 VAC:
         a Do a check and repair the wiring between the related:
  • Ballast unit pin 7 and circuit breaker 1LQ
  • Ballast unit pin 4 and GND
  • Ballast unit pin 8 and GND ASM 332401.
     (b) Do a check for 115 VAC at the related CLEDU pin 7.
       1 If there is approximately 115 VAC:
         a Replace the related CLEDU AMM 33-24-11-000-802 and AMM 33-24-11-400-802.
       2 If there is no 115 VAC:
         a Do a check and repair the wiring between the related:
  • CLEDU pin 7 and circuit breaker 1LQ
  • CLEDU pin 4 and GND
  • CLEDU pin 8 and GND ASM 332401.
Subtask 33-24-00-710-053-A
B. Do the test as given in the Para. 3.A.
5. Close-up
Subtask 33-24-00-860-050-A
A. Put the aircraft back to its initial configuration.
[Rev.8 from Aug 2018] 2026.04.04 04:31:55 UTC
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