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 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 23-51/03
 3. Fault Confirmation
__________________
 A. Test Do the BITE test of the AMU-ACP (Ref. AMM TASK 23-51-00-740-002).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message NO DATA FROM AMU TO ACP 2:
 - 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 AMU (1RN) to First Officer ACP (2RN2) of the DATA OUTPUT CARD 2 signal (from pins AB/11B, 12B to pins A/K, J) (Ref. ASM 23-51/03).
 B. Do the test given in Para. 3.
 「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 225
 Nov 01/04R CES

 TASK 23-51-00-810-815

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

 - AMU (1RN)

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

 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
_______________
 A. If the test gives the maintenance message NO DATA FROM AMU TO 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 AMU (1RN) to Third Occupant ACP (2RN3) of the DATA OUTPUT CARD 3 signal (from pins AB/12C, 11C to pins A/K, J) (Ref. ASM 23-51/04).
 B. Do the test given in Para. 3. R
 「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 : ALL ∞∞23-51-00∞∞∞∞∞∞∞∞∞∞Page 226
 Nov 01/04 CES

 TASK 23-51-00-810-818

 Loss of the Power Supply of the ACP 1 and AMU Card 1
 1. Possible Causes
_______________
 - ACP-CAPT (2RN1)

 - AMU (1RN)

 - C/B-COM/AUDIO/ACP/CPT (4RN)

 - 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) 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 23-51/02
 3. Fault Confirmation
__________________
 A. Test Do the BITE test of the AMU-ACP (Ref. AMM TASK 23-51-00-740-002).
 4. Fault Isolation
_______________
 A. Table of the circuit breakers used in this procedure:
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU COM/AUDIO/ACP/CAPT 4RN G06
 B. If the BITE test gives the two maintenance messages AUDIO, NO DATA FROM ACP1 and AUDIO MANAGEMENT UNIT:
 - do a check of the circuit breaker (4RN) status.
 (1) If the circuit breaker is closed:
　
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