(1TX1)
 ASM 46-21/05

 3. Fault Confirmation
__________________
 A. Test
 (1) Do the BITE test of the ATIMS (Ref. AMM TASK 46-21-00-740-001).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message DMC2(1WT2)/ATSU1(1TX1):
 - replace the DMC-2 (1WT2) (Ref. AMM TASK 31-63-34-000-001) and (Ref. AMM TASK 31-63-34-400-001).
 (1) If the fault continues:
 - replace the ATSU (1TX1) (Ref. AMM TASK 46-21-34-000-001) and (Ref. AMM TASK 46-21-34-400-001).
 (a) If the fault continues:
 - remove the DMC 2 and the ATSU

 - do a check and repair the wiring of the DMC 2 DATA BUS: between pins AB/1E,1F of the DMC 1 and pins AB/5A,5B of the ATSU (Ref. ASM 46-21/05)

 - install the DMC 2 and the ATSU.

 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 : 106-149, 151-199, 201-299, 301-399, ∞∞46-21-00∞∞∞∞∞∞∞∞∞∞Page 222
 401-499, Aug 01/05 CES Loss of the DMU Data Detected by the ATSU

 1. Possible Causes
_______________
 - DMU (1TV)

 - ATSU (1TX1)

 - wiring of the AIDS DATA BUS

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 31-36-34-000-001 Removal of the Data Management Unit (DMU) (1TV)
 AMM 31-36-34-400-001 Installation of the Data Management Unit (DMU) (1TV)
 AMM 46-21-00-740-001 BITE Test of the ATIMS
 AMM 46-21-34-000-001 Removal of the Air Traffic Service Unit (ATSU) (1TX1)
 AMM 46-21-34-400-001 Installation of the Air Traffic Service Unit (ATSU)

 (1TX1)
 ASM 46-21/05

 3. Fault Confirmation
__________________
 A. Test
 (1) Do the BITE test of the ATIMS (Ref. AMM TASK 46-21-00-740-001).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message DMU(1TV)/ATSU1(1TX1):
 - replace the DMU (1TV) (Ref. AMM TASK 31-36-34-000-001) and (Ref. AMM TASK 31-36-34-400-001).
 (1) If the fault continues:
 - replace the ATSU (1TX1) (Ref. AMM TASK 46-21-34-000-001) and (Ref. AMM TASK 46-21-34-400-001).
 (a) If the fault continues:
 - remove the DMU and the ATSU

 - do a check and repair the wiring of the AIDS DATA BUS: between pins AB/11J,11K of the DMU and pins AB/8A,8B of the ATSU (Ref. ASM 46-21/05)

 - install the DMU and the ATSU.

 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 : 106-149, 151-199, 201-299, 301-399, ∞∞46-21-00∞∞∞∞∞∞∞∞∞∞Page 223
 401-499, Aug 01/05 CES Loss of Ground Data Reception by the ATSU

 1. Possible Causes
_______________
 - ATSU (1TX1)

 - XCVR-VHF, 3 (1RC3)

 - wiring of the VDR/3 INPUT BUS

 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 46-21-00-710-002 VHF 3 Link Test of the ATSU AMM 46-21-34-000-001 Removal of the Air Traffic Service Unit (ATSU) (1TX1) AMM 46-21-34-400-001 Installation of the Air Traffic Service Unit (ATSU)
 (1TX1)
 ASM 46-21/05

 3. Fault Confirmation
__________________
 A. Test

 (1) Do the VHF3 Link Test (Ref. AMM TASK 46-21-00-710-002).
 NOTE : Set the frequency of the ground station.
____
 4. Fault Isolation
_______________
 A. If the test gives the FAILED indication:
 - replace the ATSU (1TX1) (Ref. AMM TASK 46-21-34-000-001) and (Ref. AMM TASK 46-21-34-400-001).
 (1) If the fault continues:
 - replace the XCVR-VHF, 3 (1RC3) (Ref. AMM TASK 23-12-33-000-001) and (Ref. AMM TASK 23-12-33-400-001).
 (a) If the fault continues:
 - do a check and repair the wiring of the VDR/3 INPUT BUS from the VDR3 (1RC3) pins AB/10C,10D to the ATSU (1TX1) pins AA/4J,4K (Ref. ASM 46-21/05).
　
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