(2) In the headset:
 - check the reception in the boomset of the same station.
 (a) If the reception in the boomset is incorrect:
 - replace the AMU (1RN) (Ref. AMM TASK 23-51-34-000-001) and (Ref. AMM TASK 23-51-34-400-001).
 1 If the fault continues:
_
 - do a check and repair the wiring from AMU (1RN) pins AA/15G, 15H to the first terminal block (Ref. ASM 23-51/04).
 (b) If the reception in the boomset is correct:
 - connect a new headset to the Third Occupant headset jack (18RN3) on the panel 62VU.
 1 If the fault continues:
_
 - replace the JACK-HEADSET, 3RD OCCPNT (18RN3) (Ref. IPC 235108).
 2 If the fault continues:
_
 - do a check and repair the wiring from Third Occupant headset jack (18RN3) pins 1 and 2 to the first terminal block (Ref. ASM 23-51/04).
 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 250
 Aug 01/01R
 CES

 TASK 23-51-00-810-834

 Loss of the Reception at the Supplementary Headset
 1. Possible Causes
_______________
 - AMU (1RN)

 - JACK-HEADSET, SUPPLEMENTARY (18RN5)

 - wiring from supplementary headset jack (18RN5) to AMU (1RN)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
IPC 235108 AMM 23-51-00-710-001 Operational Test of the Audio Management 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
 (1) Do the operational test of the audio management system (Ref. AMM TASK 23-51-00-710-001).
 4. Fault Isolation
_______________
 A. If the reception of the supplementary headset is incorrect:
 - connect a new headset to the supplementary headset jack (18RN5) on the panel 15VU.
 (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:
 - replace the JACK-HEADSET, SUPPLEMENTARY (18RN5) (Ref. IPC 235108).
 1 If the fault continues:
_
 - do a check and repair the wiring from supplementary headset jack (18RN5) to AMU (1RN) from pins 1 and 2 to pins AA/14H, 14G (Ref. ASM 23-51/04).
 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 251
 Aug 01/01R CES

 TASK 23-51-00-810-835

 Loss of the Transmission from the Captain Boomset
 1. Possible Causes
_______________
 - AMU (1RN)

 - RCPT-BOOMSET, CAPT (17RN1)

 - wiring from Captain boomset receptacle (17RN1) to AMU (1RN)

 - CAPT PTT SWITCH (11RN)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE  DESIGNATION
 -------------------------------------------------------------------------------
IPC 235108
 AMM 23-51-00-710-001 Operational Test of the Audio Management
 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)

R  AMM 27-92-41-000-001 Removal of the Side Stick Assembly 19VU (18VU)
R  AMM 27-92-41-400-001 Installation of the Side Stick Assembly 19VU (18VU) ASM 23-51/02
 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the audio management system (Ref. AMM TASK 23-51-00-710-001).
 4. Fault Isolation
_______________
 A. After you speak in the Captain boomset microphone:
 - if the reception is incorrect at each loud speaker and boomset of each crew station: . connect a new boomset to the Captain boomset receptacle (17RN1) on the panel 61VU.

 (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).
　
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