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 A. If the transmission function is not possible during the operational test of the HF 2 system:
 - replace the XCVR-HF, 2 (3RE2) (Ref. AMM TASK 23-11-33-000-001) and (Ref. AMM TASK 23-11-33-400-001).
 (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 the HF 2 transceiver (3RE2) to the AMU (1RN) of the MIKE INPUT signal, from pins AB/1B, 1A to pins AA/5D, 5E (Ref. ASM 23-11/01).
 「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 : 051-099, 201-210, 301-399, 401-499, ∞∞23-11-00∞∞∞∞∞∞∞∞∞∞Page 238
 Aug 01/05 CES

 B. Do the test given in Para. 3.

 TASK 23-11-00-810-818

 Loss of the HF 2 Reception
 1. Possible Causes
_______________
 - AMU (1RN)

 - 3RE2

 - wiring from the HF 2 transceiver (3RE2) to the AMU (1RN)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 23-11-00-710-001 Operational Test of the HF System
 AMM 23-11-33-000-001 Removal of the HF Transceiver (3RE1, 3RE2)
 AMM 23-11-33-400-001 Installation of the HF Transceiver (3RE1, 3RE2)
 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 23-11/02

 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the HF system (Ref. AMM TASK 23-11-00-710-001).
 NOTE : Do this test for the HF 2 system only.
____
 4. Fault Isolation
_______________
 A. If the reception function is not possible during the operational test of the HF 2 system:
 - replace the 3RE2 (Ref. AMM TASK 23-11-33-000-001) and (Ref. AMM TASK 23-11-33-400-001).
 (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 the HF 2 transceiver (3RE2) to the AMU (1RN) of the AUDIO SIDETONE OUTPUT signal, from pins AB/1D, 1E to pins AA/5A, 5B (Ref. ASM 23-11/02).
 B. Do the test given in Para. 3.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 051-099, 201-210, 301-399, 401-499, ∞∞23-11-00∞∞∞∞∞∞∞∞∞∞Page 240
 Aug 01/05 CES **ON A/C ALL

 TASK 23-11-00-810-819
 Loss of the BUS 1 Data from the CFDIU to the HF 1
 1. Possible Causes
_______________
 - XCVR-HF, 1 (3RE1)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 23-11-00-740-001 Bite Test of the HF System
 AMM 23-11-33-000-001 Removal of the HF Transceiver (3RE1, 3RE2)
 AMM 23-11-33-400-001 Installation of the HF Transceiver (3RE1, 3RE2)
 ASM 31-32/02

 3. Fault Confirmation
__________________
 A. Make sure that this(these) circuit breaker(s) is(are) closed: -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
121VU CFDS/CFDIU/SPLY 2TW J18 R R **ON A/C ALL R Post SB 31-1163 For A/C 155-156,208-209, R 121VU CFDS/CFDIU/BACK/UP 8TW J17 R **ON A/C ALL
 B. Test Do the BITE test of the HF system (Ref. AMM TASK 23-11-00-740-001).
 NOTE : Do this test for the HF 1 only.
____
 「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 ∞∞23-11-00∞∞∞∞∞∞∞∞∞∞Page 241
 Feb 01/05 CES 4. Fault Isolation

_______________
 A. If the test gives the maintenance message CFDIU (1TW)/HF1 (3RE1):
 - replace the XCVR-HF, 1 (3RE1) (Ref. AMM TASK 23-11-33-000-001) and (Ref. AMM TASK 23-11-33-400-001).
 (1) If the fault continues:
　
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