R B. If the circuit breaker (5SQ2) is closed and if the BITE test is not
R possible
R - do a check for 115VAC at pin AC/2 of the weather radar transceiver 2.
R (1) If there is no 115VAC:
R - do a check of the wiring of the 115VAC signal from circuit breaker
R (5SQ2) to weather radar transceiver 2 (1SQ2) (Ref. ASM 34-41/01).
R (a) If there is no continuity:
R - repair the above wiring.
R (b) If there is continuity:
R - replace the C/B-COM NAV/RADAR/2 (5SQ2).
R (2) If there is 115VAC:
R - do a check of the wiring of the ground signal at weather radar
R transceiver 2 pin AC/7.
R (a) If there is no continuity:
R - repair the above wiring.
R C. If the circuit breaker (5SQ2) is open:
R - close this circuit breaker.
R (1) If the circuit breaker (5SQ2) trips:
R - remove the XCVR-WEATHER RADAR, 2 (1SQ2) (Ref. AMM TASK 34-41-33-R 000-004).
R - close the circuit breaker (5SQ2).
R (a) If this circuit breaker stays closed:
R - install the weather radar transceiver 2 (Ref. AMM TASK 34-41-R 33-400-003)
R 1_ If the circuit breaker trips again:
R - replace the weather radar transceiver 2 (Ref. AMM TASK 34-R 41-33-000-004) and (Ref. AMM TASK 34-41-33-400-003).
R (b) If this circuit breaker trips again:
R - do a check for a short to ground at the wiring between the
R circuit breaker (5SQ2) and the weather radar transceiver 2
R (1SQ2). (Ref. ASM 34-41/01).
R 1_ If there is a short to ground:
R - repair the above wiring.
「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 : 051-099, ∞∞34-41-00∞∞∞∞∞∞∞∞∞∞Page 215
May 01/05 CES
R 2_ If there is no short to ground:
R - replace the C/B-COM NAV/RADAR/2.
R 3_ Install the weather radar transceiver 2
R (Ref. AMM TASK 34-41-33-400-003).
R D. Do the test given in Para. 3.
R **ON A/C ALL
TASK 34-41-00-810-804
Loss of the Weather Radar channel 1 bus identified by the EIS 1
1. Possible Causes_______________
R - XCVR-WEATHER RADAR, 1 (1SQ1) - XCVR-WEATHER RADAR, 2 (1SQ2) - wiring
2. Job Set-up Information______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 31-60-00-740-002 EIS Input Test AMM 34-41-33-000-004 Removal of the Weather Radar Transceiver (1SQ1, 1SQ2) AMM 34-41-33-400-003 Installation of the Weather Radar Transceiver (1SQ1, 1SQ2) ASM 34-41/01
3. Fault Confirmation__________________
A. Make sure that this(these) circuit breaker(s) is(are) closed:
-------------------------------------------------------------------------------
PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
121VU COM NAV/RADAR/1 5SQ1 K13
R **ON A/C 051-099,
R 121VU COM NAV/RADAR/2 5SQ2 K14
R **ON A/C ALL
B. Test
(1) Do the EIS input test (Ref. AMM TASK 31-60-00-740-002).
4. Fault Isolation
_______________
R **ON A/C 001-049, 101-149, 151-199, 201-299, 301-399, 401-499,
A. If the test gives the maintenance message DMC1 : NO WXR 1 DATA or DMC1 : NO WXR 1 CH1 DATA
- replace the XCVR-WEATHER RADAR, 1 (1SQ1) (Ref. AMM TASK 34-41-33-000-004) and (Ref. AMM TASK 34-41-33-400-003).
(1) If the fault continues:
- do a check and repair the wiring of the TR1 DATA BUS 1 OUTPUT bus from the weather radar transceiver 1 (1SQ1) to the first terminal block (Ref. ASM 34-41/01).
**ON A/C 051-099,
A. If the test gives the maintenance message DMC1 : NO WXR 1 DATA or DMC2 : NO WR1/2 CH1 DATA:
(1) on the weather radar control unit (3SQ), do a check of the position of the system selector switch.
(a) If the weather radar system 1 is set:
- replace the XCVR-WEATHER RADAR, 1 (1SQ1) (Ref. AMM TASK 34-41-33-000-004) and (Ref. AMM TASK 34-41-33-400-003).
(b) If the weather radar system 2 is set:
- replace XCVR-WEATHER RADAR, 2 (1SQ2) (Ref. AMM TASK 34-41-33-000-004) (Ref. AMM TASK 34-41-33-400-003)
(2) If the fault continues:
- do a check of the wiring of the TR1 DATA BUS 1 OUTPUT bus from the weather radar transceiver 1 (1SQ1) to the first terminal block (Ref. ASM 34-41/01).
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本文链接地址：A320 Trouble Shooting Manual 排故手册 导航 NAVIGATION 3(7)
