____ result from a bad transmission from the ground station.
(2) If the test is not OK:
- refer to the procedures (Ref. TASK 34-51-00-810-823) and (Ref. TASK 34-51-00-810-828).
TASK 34-52-00-810-801
Failure of the ATC/MODE S Transponder 1
1. Possible Causes
_______________
- XPDR-ATC/MODE S, 1 (1SH1)
- CTL UNIT-ATC/TCAS (3SH)
- short to ground at the wiring between circuit breaker (5SH1) and two units (1SH1, 3SH)
- C/B-NAV/ATC/1 (5SH1)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 34-52-00-740-004 BITE Test of the ATC
AMM 34-52-12-000-001 Removal of the ATC/TCAS Control Unit (3SH)
AMM 34-52-12-400-001 Installation of the ATC/TCAS Control Unit (3SH)
AMM 34-52-33-000-001 Removal of the ATC/Mode S Transponder (1SH1, 1SH2)
AMM 34-52-33-400-001 Installation of the ATC/Mode S Transponder
(1SH1,1SH2)
ASM 34-52/01
3. Fault Confirmation
__________________
A. Make sure that this(these) circuit breaker(s) is(are) closed:
-------------------------------------------------------------------------------
PANEL DESIGNATION IDENT. LOCATION
-------------------------------------------------------------------------------
R 49VU COM NAV/ATC/1 5SH1 G11
B. Test
(1) If the circuit breaker (5SH1) is trips, refer to Para. 4. C. of this trouble shooting procedure.
(2) Do the BITE test of the ATC (Ref. AMM TASK 34-52-00-740-004).
(a) If the BITE test is not possible, refer to Para. 4. B. of this trouble shooting procedure.
4. Fault Isolation
_______________
**ON A/C 001-049, 101-105, 151-199,
A. If the circuit breaker (5SH1) is closed, and if the BITE test gives the maintenance message ATC1: TRANSPONDER:
- replace the XPDR-ATC/MODE S, 1 (1SH1) (Ref. AMM TASK 34-52-33-000-001) and (Ref. AMM TASK 34-52-33-400-001).
R **ON A/C 051-099, 106-149, 201-299, 301-399, 401-499,
A. If the circuit breaker (5SH1) is closed, and if the BITE test gives the maintenance message ATC1 (1SH1) :
- replace the XPDR-ATC/MODE S, 1 (1SH1) (Ref. AMM TASK 34-52-33-000-001) and (Ref. AMM TASK 34-52-33-400-001).
**ON A/C ALL
B. If the circuit breaker (5SH1) is closed and if the BITE test is not possible:
(1) do a check of the wiring of the 115VAC signal from the circuit breaker (5SH1) to the ATC/Mode S transponder 1 (1SH1) and to the ATC/TCAS control unit (3SH) (Ref. ASM 34-52/01)
(a) If there is no continuity:
- repair the above wirings.
(b) If there is continuity:
- replace the C/B-NAV/ATC/1 (5SH1).
(2) If the fault continues:
- do a check of the wiring of the ground signal at ATC/Mode S transponder 1 pin AC/7 and at ATC/TCAS control unit pin A/4.
(a) If there is no continuity:
- repair the above wirings.
C. If the circuit breaker (5SH1) is open:
- close this circuit breaker.
(1) If the circuit breaker (5SH1) trips:
- remove these two units: . XPDR-ATC/MODE S, 1 (1SH1) (Ref. AMM TASK 34-52-33-000-001) . CTL UNIT-ATC/TCAS (3SH) (Ref. AMM TASK 34-52-12-000-001)
- close the circuit breaker (5SH1).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞34-52-00∞∞∞∞∞∞∞∞∞∞Page 202
Aug 01/05 CES
(a) If this circuit breaker stays closed:
- connect the CTL UNIT-ATC/TCAS
(b) If this circuit breaker trips again:
1_ If the circuit breaker trips again:
- replace the CTL UNIT-ATC/TCAS (Ref. AMM TASK 34-52-12-000-
001) and (Ref. AMM TASK 34-52-12-400-001).
2_ If the circuit breaker stays closed:
- replace the XPDR-ATC/MODE S, 1 (Ref. AMM TASK 34-52-33-000-
001) and (Ref. AMM TASK 34-52-33-400-001)
- do a check for a short to ground at the wiring between circuit breaker (5SH1) and two units (1SH1, 3SH) (Ref. ASM 34-52/01). 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320 Trouble Shooting Manual 排故手册 导航 NAVIGATION 3(107)
