A. If the test gives the maintenance message ACP2(2RN2)/AMU(1RN):
 - replace the ACP-F/O (2RN2) (Ref. AMM TASK 23-51-12-000-001) and (Ref. AMM TASK 23-51-12-400-001).
 (1) If the fault continues:
 - replace the AMU (1RN) (Ref. AMM TASK 23-51-34-000-001) and (Ref. AMM TASK 23-51-34-400-001).
 (a) If the fault continues:
 - do a check and repair the wiring from First Officer ACP (2RN2) to AMU (1RN) of the DATA OUT signal (from pins A/H, G to pins AB/13B, 14B) (Ref. ASM 23-51/03).
 **ON A/C ALL
 B. Do the test given in Para. 3.

 TASK 23-51-00-810-810
 Loss of the Data from the Third Occupant ACP to the AMU
 1. Possible Causes
_______________
 - ACP-3RD OCCPNT (2RN3)

 - AMU (1RN)

 - wiring from Third Occupant ACP (2RN3) to AMU (1RN)

 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) AMM 23-51-34-000-001 Removal of the Audio Management Unit (AMU) (1RN) AMM 23-51-34-400-001 Installation of the Audio Management Unit (AMU) (1RN) ASM 23-51/04
 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 NO DATA FROM ACP 3:
 - replace the ACP-3RD OCCPNT (2RN3) (Ref. AMM TASK 23-51-12-000-001) and (Ref. AMM TASK 23-51-12-400-001).
 (1) If the fault continues:
 - replace the AMU (1RN) (Ref. AMM TASK 23-51-34-000-001) and (Ref. AMM TASK 23-51-34-400-001).
 (a) If the fault continues:
 - do a check and repair the wiring from Third Occupant ACP (2RN3) to AMU (1RN) of the DATA OUT signal (from pins A/H, G to pins AB/14C, 13C) (Ref. ASM 23-51/04).
 「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 220
 May 01/05 CESR **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 ACP3(2RN3)/AMU(1RN):
 - replace the ACP-3RD OCCPNT (2RN3) (Ref. AMM TASK 23-51-12-000-001) and (Ref. AMM TASK 23-51-12-400-001).
 (1) If the fault continues:
 - replace the AMU (1RN) (Ref. AMM TASK 23-51-34-000-001) and (Ref. AMM TASK 23-51-34-400-001).
 (a) If the fault continues:
 - do a check and repair the wiring from Third Occupant ACP (2RN3) to AMU (1RN) of the DATA OUT signal (from pins A/H, G to pins AB/14C, 13C) (Ref. ASM 23-51/04).
 **ON A/C ALL
 B. Do the test given in Para. 3.

R TASK 23-51-00-810-811

R Loss of the Data from the Avionics Compartment ACP to the AMU R 1. Possible Causes
_______________
R - ACP-AVNCS COMPT (2RN4)
R - AMU (1RN)
R - wiring from avionics compartment ACP (2RN4) to AMU (1RN)

R 2. Job Set-up Information

______________________
R A. Referenced Information
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION R -------------------------------------------------------------------------------
R AMM 23-51-12-000-001 R R AMM 23-51-12-400-001 R R AMM 23-51-34-000-001 R AMM 23-51-34-400-001 R ASM 23-51/05
R 3. Fault Confirmation
__________________
R 4. Fault Isolation
_______________
Removal of the Audio Control Panel (ACP) (2RN1, 2RN2,
2RN3, 2RN4, 2RN5)
Installation of the Audio Control Panel (ACP) (2RN1,
2RN2, 2RN3, 2RN4, 2RN5)
Removal of the Audio Management Unit (AMU) (1RN)
Installation of the Audio Management Unit (AMU) (1RN)

R A. If the test gives the maintenance message ACP4(2RN4)/AMU(1RN):
R - replace the ACP-AVNCS COMPT (2RN4) (Ref. AMM TASK 23-51-12-000-001) and
R (Ref. AMM TASK 23-51-12-400-001).

R (1) If the fault continues:
R - replace the AMU (1RN) (Ref. AMM TASK 23-51-34-000-001) and (Ref.
R AMM TASK 23-51-34-400-001).

R (a) If the fault continues:
R - do a check and repair the wiring from avionics compartment ACP
　
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