- replace the SDU (105RV1) (Ref. AMM TASK 23-28-34-000-001) and (Ref. AMM TASK 23-28-34-400-001).
(1) If the fault continues:
- remove the SATCOM SDU
- do a check and repair the wiring of the DATA BUS TO MCDU1,2,3 signal (from the SDU (105RV1) pins AB/3J,3K to the first terminal block) (Ref. ASM 23-28/06)
- install the SATCOM SDU.
5. Close-up
________
A. 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 : 401-499, ∞∞23-28-00∞∞∞∞∞∞∞∞∞∞Page 225
Aug 01/05 CES
TASK 23-28-00-810-825
Loss of the Data between the ATSU (1TX1) and the SDU
1. Possible Causes
_______________
- ATSU (1TX1)
- SDU (105RV1)
- wiring of the DATA BUS INPUT ATSU signal
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 23-28-00-740-001 BITE Test of the Satellite Communication System AMM 23-28-34-000-001 Removal of the Satellite Data Unit (SDU) 105RV1 AMM 23-28-34-400-001 Installation of the Satellite Data Unit (SDU) 105RV1 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 23-28/15
3. Fault Confirmation
__________________
A. Test
(1) Do the BITE test of the SATCOM System (Ref. AMM TASK 23-28-00-740-001).
4. Fault Isolation
_______________
A. If the test gives the maintenance message ATSU(1TX1)/SDU1(105RV1)
- 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 SDU (105RV1) (Ref. AMM TASK 23-28-34-000-001) and (Ref. AMM TASK 23-28-34-400-001).
(2) If the fault continues:
- remove the SATCOM SDU
- remove the ATSU
- do a check and repair the wiring of the DATA BUS INPUT ATSU signal (from the ATSU (1TX1) pins AA/1G,1H to the SDU (105RV1) pins AB/1G,1H (Ref. ASM 23-28/15)
- install the SATCOM SDU
- install the ATSU.
「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 : 401-499, ∞∞23-28-00∞∞∞∞∞∞∞∞∞∞Page 226
Aug 01/05 CES
5. Close-up
________
A. Do the test given in Para. 3.
ANNOUNCEMENT - MUSIC TAPE REPRODUCER SYSTEM - FAULT ISOLATION PROCEDURES
________________________________________________________________________
TASK 23-32-00-810-801
Fault of the Bite Transmission from the PRAM
1. Possible Causes
_______________
- RPDR-ANNOUNCE/MUSIC (10RX)
- wiring
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------
REFERENCE QTY DESIGNATION
-------------------------------------------------------------------------------
No specific circuit breaker(s) safety clip(s)
B. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 23-32-00-860-001 Replacement of the Sound Recording Medium of the Prerecorded Announcement and Boarding Music (PRAM) Reproducer
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