- XCVR-VHF, 3 (1RC3)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 23-12-33-000-001 Removal of the VHF Transceiver (1RC1, 1RC2, 1RC3) AMM 23-12-33-400-001 Installation of the VHF Transceiver (1RC1, 1RC2,
 1RC3) AMM 23-24-00-710-001 Operational Test of the ACARS AMM 23-24-34-000-001 Removal of the ACARS Management Unit (MU) (1RB) AMM 23-24-34-400-001 Installation of the ACARS Management Unit (MU) (1RB) ASM 23-24/01
 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the ACARS (Ref. AMM TASK 23-24-00-710-001).
 4. Fault Isolation
_______________
 A. If, during the operational test, the ACARS cannot control the VHF3 frequency through an RMP:
 - replace the MU-ACARS (1RB) (Ref. AMM TASK 23-24-34-000-001) and (Ref. AMM TASK 23-24-34-400-001).
 (1) If the fault continues:
 - do a check for a ground signal at pin AA/7C of the ACARS MU (1RB) (Ref. ASM 23-24/01).
 (a) If there is no ground signal:

 - repair the wiring of the DFS PORT SELECT DISCRETE from the ACARS MU (1RB) to the first terminal block (Ref. ASM 23-24/01).

 (b) If there is a ground signal:

 - replace the XCVR-VHF, 3 (1RC3) (Ref. AMM TASK 23-12-33-000-001) and (Ref. AMM TASK 23-12-33-400-001).
 「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 : 001-049, 051-099, 101-105, ∞∞23-24-00∞∞∞∞∞∞∞∞∞∞Page 219
 May 01/05 CES 1 If the fault continues:

_
 - do a check and repair the wiring of the DIGITAL FREQUENCY SELECTION DATA from ACARS MU (1RB) pins AA/7A, 7B to VHF3 transceiver (1RC3) pins AB/11A, 11B (Ref. ASM 23-24/01).
 B. Do the test given in Para. 3.

 TASK 23-24-00-810-821

 Loss of the Frequency Control by the ACARS MU on the RMP1
 1. Possible Causes
_______________
 - RMP-COM/NAV FREQ SEL, 1 (1RG1)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 23-13-13-000-001 Removal of the Radio Management Panel (CRMP) (1RG1, 1RG2, 1RG3) AMM 23-13-13-400-001 Installation of the Radio Management Panel (CRMP)
 (1RG1, 1RG2, 1RG3) AMM 23-24-00-710-001 Operational Test of the ACARS ASM 23-24/01
 3. Fault Confirmation
__________________

 A. Test
 (1) Do the operational test of the ACARS (Ref. AMM TASK 23-24-00-710-001).
 4. Fault Isolation
_______________
 A. If, during the operational test, the ACARS cannot control the VHF3
 frequency through the RMP1 only:

 - replace the RMP-COM/NAV FREQ SEL, 1 (1RG1) (Ref. AMM TASK 23-13-13-000-001) and (Ref. AMM TASK 23-13-13-400-001).
 (1) If the fault continues:
 - repair the wiring of the DFS PORT SELECT DISCRETE from RMP1 (1RG1) pin A/F to the first terminal block (Ref. ASM 23-24/01).
 B. Do the test given in Para. 3.

 TASK 23-24-00-810-822

 Loss of the Frequency Control by the ACARS MU on the RMP2
 1. Possible Causes
_______________
 - RMP-COM/NAV FREQ SEL, 2 (1RG2)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 23-13-13-000-001 Removal of the Radio Management Panel (CRMP) (1RG1, 1RG2, 1RG3) AMM 23-13-13-400-001 Installation of the Radio Management Panel (CRMP)
 (1RG1, 1RG2, 1RG3) AMM 23-24-00-710-001 Operational Test of the ACARS ASM 23-24/01
 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the ACARS (Ref. AMM TASK 23-24-00-710-001).
 4. Fault Isolation
_______________
 A. If, during the operational test, the ACARS cannot control the VHF3
 frequency through the RMP2 only:

 - replace the RMP-COM/NAV FREQ SEL, 2 (1RG2) (Ref. AMM TASK 23-13-13-000-001) and (Ref. AMM TASK 23-13-13-400-001).
 (1) If the fault continues:
 - repair the wiring of the DFS PORT SELECT DISCRETE from RMP2 (1RG2) pin A/F to the first terminal block (Ref. ASM 23-24/01).
　
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