R  (8) If the fault continues: 
R  (a) Electrically disconnect the MAINTENANCE INTERPHONE JACK (14RJ). 
R  1_  Do the tests given in the para. 3.
R  a_  If the fault continues:
R  - Connect the MAINTENANCE INTERPHONE JACK (14RJ). 
R  b_  If there is no fault:
R  - Replace the MAINTENANCE INTERPHONE JACK (14RJ). 
R  (9) If the fault continues: 
R  - Do a check and repair as necessary the wiring between the CIDS 
R  DIRECTOR 1 (101RH) and/or the CIDS DIRECTOR 2 (102RH) connectors 
R  G7, H7, J7 and the: 
R  - MAINTENANCE INTERPHONE JACK, ENG1 (4000RJ-1) 
R  - MAINTENANCE INTERPHONE JACK, ENG2 (4000RJ-2) 
R  - MAINTENANCE INTERPHONE JACK (1RJ) 
R  - MAINTENANCE INTERPHONE JACK (2RJ) 
R  - MAINTENANCE INTERPHONE JACK (3RJ) 
R  - MAINTENANCE INTERPHONE JACK (11RJ) 
R  - MAINTENANCE INTERPHONE JACK (13RJ) 
R  - MAINTENANCE INTERPHONE JACK (14RJ), (Ref. ASM 23-44/01).
 B. Do the test as given in para. 3.

 201-299, May 01/05 CES

 AUDIO MANAGEMENT (INTEGRATING/ FLIGHT INTERPHONE/SELCAL/CALL)
_____________________________________________________________ FAULT ISOLATION PROCEDURES
__________________________
 TASK 23-51-00-810-801
 Failure of the Captain ACP
 1. Possible Causes
_______________
 - ACP-CAPT (2RN1)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 23-51-00-740-002 BITE Test of the Audio System AMM 23-51-12-000-001 Removal of the Audio Control Panel (ACP) (2RN1, 2RN2, 2RN3, 2RN4, 2RN5) AMM 23-51-12-400-001 Installation of the Audio Control Panel (ACP) (2RN1, 2RN2, 2RN3, 2RN4, 2RN5) ASM 23-51/02
 3. Fault Confirmation
__________________
 A. Test Do the BITE test of the AMU-ACP (Ref. AMM TASK 23-51-00-740-002).
 4. Fault Isolation
_______________
R **ON A/C 001-001, 051-052,
 A. If the test gives the maintenance message AUDIO CONTROL PANEL 1:
 - do a check for 28VDC at pin A/M of the Captain ACP (2RN1) (Ref. ASM 23-51/02).
 (1) If there is 28VDC:

 - replace the ACP-CAPT (2RN1) (Ref. AMM TASK 23-51-12-000-001) and (Ref. AMM TASK 23-51-12-400-001).

 (2) If there is no 28VDC:

 - do a check for a ground signal at pin A/N of the Captain ACP (2RN1) (Ref. ASM 23-51/02).
 (a) If there is no ground signal:
 - repair the wiring between Captain ACP (2RN1) pin A/N and the ground terminal (Ref. ASM 23-51/02).
 「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 ∞∞23-51-00∞∞∞∞∞∞∞∞∞∞Page 201
 May 01/05 CES (b) If there is a ground signal:

 - do a check and repair the wiring from Captain ACP (2RN1) pin A/M to the first terminal block (Ref. ASM 23-51/02).
R **ON A/C 002-049, 053-099, 101-149, 151-199, 201-299, 301-399, 401-499,
 A. If the test gives the maintenance message ACP1(2RN1):
 - do a check for 28VDC at pin A/M of the Captain ACP (2RN1) (Ref. ASM 23-51/02).
 (1) If there is 28VDC:

 - replace the ACP-CAPT (2RN1) (Ref. AMM TASK 23-51-12-000-001) and (Ref. AMM TASK 23-51-12-400-001).

 (2) If there is no 28VDC:

 - do a check for a ground signal at pin A/N of the Captain ACP (2RN1) (Ref. ASM 23-51/02).
 (a) If there is no ground signal:

 - repair the wiring between Captain ACP (2RN1) pin A/N and the ground terminal (Ref. ASM 23-51/02).

 (b) If there is a ground signal:

 - do a check and repair the wiring from Captain ACP (2RN1) pin A/M to the first terminal block (Ref. ASM 23-51/02).
 **ON A/C ALL
 B. Do the test given in Para. 3.

 TASK 23-51-00-810-802

 Failure of the First Officer ACP

 1. Possible Causes
_______________
 - ACP-F/O (2RN2)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 23-51-00-740-002 BITE Test of the Audio System AMM 23-51-12-000-001 Removal of the Audio Control Panel (ACP) (2RN1, 2RN2, 2RN3, 2RN4, 2RN5) AMM 23-51-12-400-001 Installation of the Audio Control Panel (ACP) (2RN1, 2RN2, 2RN3, 2RN4, 2RN5) ASM 23-51/03
　
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