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ELECTRICAL CLOCK - FAULT ISOLATION PROCEDURES _____________________________________________ TASK 31-21-00-810-801 Failure of the Clock
1. Possible Causes _______________ - CLOCK (2FS) 2. Job Set-up Information ______________________ A. Referenced Information -------------------------------------------------------------------------------REFERENCE DESIGNATION ------------------------------------------------------------------------------- AMM 31-21-21-000-001 Removal of the Clock (2FS) AMM 31-21-21-400-001 Installation of the Clock (2FS) AMM 31-32-00-740-003 Ground Scanning of the CFDIU
3. Fault Confirmation __________________ A. Make sure that this(these) circuit breaker(s) is(are) closed: -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU CLOCK/NORM/SPLY 6FS F11 **ON A/C 001-049, 051-061, 101-105, 201-203, 121VU CLOCK/STBY/SPLY 4FS N03 R **ON A/C 062-099, 106-149, 151-199, 204-299, 301-399, 401-499, 121VU CLOCK/STBY/SPLY 4FS N02 **ON A/C ALL B. Test Do the ground scanning of the CFDIU (Ref. AMM TASK 31-32-00-740-003). 4. Fault Isolation _______________ A. If the test gives the maintenance message CLOCK: - replace the CLOCK (2FS), (Ref. AMM TASK 31-21-21-000-001) and (Ref. AMM TASK 31-21-21-400-001). 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞31-21-00∞∞∞∞∞∞∞∞∞∞Page 201 Aug 01/05 CES
B. Do the test given in Para. 3.B.
「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 ∞∞31-21-00∞∞∞∞∞∞∞∞∞∞Page 202 Feb 01/00R CES Failure of the Power Supply of the Clock
1. Possible Causes _______________ - CLOCK (2FS)
- C/B CLOCK/NORM/SPLY (6FS)
2. Job Set-up Information ______________________ A. Referenced Information -------------------------------------------------------------------------------REFERENCE DESIGNATION ------------------------------------------------------------------------------- AMM 31-21-21-000-001 Removal of the Clock (2FS) AMM 31-21-21-400-001 Installation of the Clock (2FS) ASM 31-21/01 3. Fault Confirmation __________________ A. Test Not applicable, the fault is evident.
4. Fault Isolation _______________ A. When the displays go off: - do a check of the status of the circuit breaker (6FS). (1) If the circuit breaker (6FS) is closed: - replace the CLOCK (2FS), (Ref. AMM TASK 31-21-21-000-001) and (Ref. AMM TASK 31-21-21-400-001). (a) If the fault continues: - do a check of the wiring from the clock (2FS) pin A/V to the circuit breaker (6FS) , (Ref. ASM 31-21/01). 1 If there is no continuity: _
- repair the wiring. 2 If there is continuity:
_ - replace the C/B CLOCK/NORM/SPLY (6FS).
「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 ∞∞31-21-00∞∞∞∞∞∞∞∞∞∞Page 203 Feb 01/00R CES (2) If the circuit breaker (6FS) is open:
- close the circuit breaker. (a) If the circuit breaker trips: - replace the CLOCK (2FS). 1 If the fault continues: _
- do a check and repair for a short to ground the wiring between the circuit breaker (6FS) and the clock (2FS). (b) If the circuit breaker stays closed and the fault continues: - replace the CLOCK (2FS). 「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 ∞∞31-21-00∞∞∞∞∞∞∞∞∞∞Page 204 Feb 01/00R CES Loss of the Bus Output from the Clock Detected by the AFS
1. Possible Causes _______________ - FMGC-1 (1CA1)
2. Job Set-up Information ______________________ A. Referenced Information -------------------------------------------------------------------------------REFERENCE DESIGNATION ------------------------------------------------------------------------------- www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320 Trouble Shooting Manual 排故手册 指示和记录系统 1
