**ON A/C ALL

 4. Fault Isolation
_______________
 A. Table of the circuit breakers used in this procedure:
 -------------------------------------------------------------------------------
PANEL DESIGNATION IDENT. LOCATION
 -------------------------------------------------------------------------------
**ON A/C 001-049, 051-060, 101-102, 201-201,
 122VU ELEC/GALLEY/CTL 1XA S26
 122VU ELEC/GALLEY/FAULT/LT CTL 8XA S25
 **ON A/C ALL
 122VU ELEC/GCU/1 2XU1 T26
R **ON A/C 061-099, 103-149, 151-199, 202-299, 301-399, 401-499,
 122VU ELEC/GALY & CAB/CTL 1XA S26
 122VU ELEC/GALY & CAB/FAULT/LT CTL 8XA S25
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
 B. If the test confirms the fault:
 - open the circuit breakers 8XA and 1XA

 - replace the P/BSW-ELEC/GALLEY (2XA) (Ref. AMM TASK 33-10-00-000-002) and (Ref. AMM TASK 33-10-00-400-002)

 - close the circuit breakers 8XA and 1XA.

 (1) If the fault continues:
 - remove the GCU2 (1XU2) (Ref. AMM TASK 24-22-34-000-001)

 - close the circuit breaker 2XU1.

 (a) If the fault does not continue:

 - install a new GCU-2 (1XU2) (Ref. AMM TASK 24-22-34-400-001).

 (b) If the fault continues:
 - open the circuit breakers 8XA and 1XA

 - disconnect the connector of the diode module 1162VD (Ref. IPC 25710104)

 - close the circuit breakers 8XA and 1XA.

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞24-22-00∞∞∞∞∞∞∞∞∞∞Page 250
 Aug 01/05 CES 1 If the fault does not continue:

_ - open the circuit breakers 8XA and 1XA
 - replace the diode module 1162VD (Ref. IPC 25710104)

 - install the GCU2 (1XU2) (Ref. AMM TASK 24-22-34-400-001)

 - close the circuit breakers 8XA and 1XA.

 2 If the fault continues:
_
 - replace the EGIU-2 (22XU2) (Ref. AMM TASK 24-22-33-000-001) and (Ref. AMM TASK 24-22-33-400-002).
 a If the fault does not continue:
_ - open the circuit breakers 8XA and 1XA
 - connect the connector of the diode module 1162VD (Ref. IPC 25710104)

 - install the GCU2 (1XU2) (Ref. AMM TASK 24-22-34-400-001)

 - close the circuit breakers 8XA and 1XA.

 b If the fault continues:
_ - open the circuit breakers 8XA and 1XA.
 - do a check and repair the wiring between: . the pin A/13 of the diode module 1162VD and the pin AA/13B of the GCU2 (1XU2) . the pin A/13 of the diode module 1162VD and the pin AA/6A of the EGIU2 (22XU2)

 - connect the connector of the diode module 1162VD (Ref. IPC 25710104)

 - install the GCU2 (1XU2) (Ref. AMM TASK 24-22-34-400-001)

 - close the circuit breakers 8XA and 1XA.

R **ON A/C 401-499,

R B. If the test confirms the fault:
R - open the circuit breakers 8XA and 1XA
R - replace the P/BSW-ELEC/GALLEY (2XA)
R - close the circuit breakers 8XA and 1XA.

R (1) If the fault continues:
R - remove the GCU 2 (1XU2) (Ref. AMM TASK 24-22-34-000-001)
R - close the circuit breaker 2XU1.

R (a) If the fault does not continue:
R - install a new GCU-2 (1XU2) (Ref. AMM TASK 24-22-34-400-001).

R (b) If the fault continues:
R - open the circuit breakers 8XA and 1XA
R - disconnect the connector of the diode module 1162VD (Ref. IPC
R 25710104)
R - close the circuit breakers 8XA and 1XA.

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞24-22-00∞∞∞∞∞∞∞∞∞∞Page 251
 Aug 01/05 CES

R  1_  If the fault does not continue:
R  - open the circuit breakers 8XA and 1XA 
R  - replace the diode module 1162VD (Ref. IPC 25710104) 
R  - install the GCU 2 (1XU2) (Ref. AMM TASK 24-22-34-400-001) 
R  - close the circuit breakers 8XA and 1XA. 
R  2_  If the fault continues:
R  - open the circuit breakers 8XA and 1XA. 
R  - do a check and repair the wiring between the pin A/13 of the 
R  diode module 1162VD and the pin AA/6G of the GCU 2 (1XU2) 
R  - connect the connector of the diode module 1162VD (Ref. IPC 
R  25710104) 
R  - install the GCU 2 (1XU2) (Ref. AMM TASK 24-22-34-400-001) 
R  - close the circuit breakers 8XA and 1XA. 
　
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