3. Fault Confirmation
__________________
A. Test Do the operational test of the VHF system (Ref. AMM TASK 23-12-00-710-001).
NOTE : Do the transmission test for more than 60 s to see the ECAM
____ warning on the upper ECAM DU. (The COM VHF 2 EMITTING message is displayed after 60 s of continuous transmission).
NOTE : Do this test at each crew station to find which station is related
____
with the failure.
NOTE : Do this test for the VHF 2 system only.
____
NOTE : At the end of the test (before you do the fault isolation
____ procedure), make sure that these controls are not in the transmit position:
- the VHF 2 transmission pushbutton switch on an Audio Control Panel
- a radio PTT switch on one of the two side sticks
- a radio PTT pushbutton switch
- a hand mike selector.
4. Fault Isolation
_______________
A. Table of the circuit breakers used in this procedure:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
121VU COM NAV/VHF/2 2RC2 L04
B. After 60 s, when the VHF 2 transmission stops, this ECAM warning does not go out of view:
- COM VHF 2 EMITTING.
(1) If the above warning does not go out of view after action on the VHF 2 transmission pushbutton switch (green bars off) (on the ACP of the related station):
- go to Para. 4.D.
(2) If the above warning goes out of view after action on the VHF 2 transmission pushbutton switch (green bars off) (on the ACP of the related station):
- go to Para. 4.C.
「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 ∞∞23-12-00∞∞∞∞∞∞∞∞∞∞Page 219
May 01/01R
CES
C. Open the circuit breaker 2RC2 on the panel 121VU, then close it.
(1) If the fault continues:
- do a check for ground at the pin AB/1D of the VHF 2 transceiver (1RC2) (Ref. ASM 23-12/02).
(a) If there is no ground signal at this pin:
- do a check and repair the wiring from VHF 2 transceiver (1RC2) pin AB/1D to the first terminal block (Ref. ASM 23-12/02)
(b) If there is a ground signal at this pin:
- replace the XCVR-VHF, 2 (1RC2) (Ref. AMM TASK 23-12-33-000-001) and (Ref. AMM TASK 23-12-33-400-001).
1_ If the fault continues:
- replace the AMU (1RN) (Ref. AMM TASK 23-51-34-000-001) and
(Ref. AMM TASK 23-51-34-400-001).
2_ If the fault continues:
- do a check and repair the wiring between AMU (1RN) pin AA/2F
and VHF 2 transceiver (1RC2) pin AB/1C (Ref. ASM 23-51/06)
- go to Para. 4.D.
D. The fault is at one of the 3 crew stations.
(1) If the fault is at the Captain station:
- do a check of continuity between pin AA/9J and pin AA/9K of the AMU (1RN) (Ref. ASM 23-51/02).
(a) If there is continuity between the two pins:
- replace the SW-RAD PTT, CAPT (11RN) (Ref. AMM TASK 27-92-41-000-001) and (Ref. AMM TASK 27-92-41-400-001).
1 If the fault continues:
_
- replace the AMU (Ref. AMM TASK 23-51-34-000-001) and (Ref. AMM TASK 23-51-34-400-001).
2 If the fault continues:
_
- do a check and repair the wiring between AMU (1RN) pins AA/9J, 9K and pins 1, 2 of the radio PTT switch (11RN) (Ref. ASM 23-51/02).
(b) If there is no continuity between the two pins:
- replace the AMU (Ref. AMM TASK 23-51-34-000-001) and (Ref. AMM TASK 23-51-34-400-001).
1 If the fault continues:
_
- replace the ACP-CAPT (2RN1) (Ref. AMM TASK 23-51-12-000-001) and (Ref. AMM TASK 23-51-12-400-001).
「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 ∞∞23-12-00∞∞∞∞∞∞∞∞∞∞Page 220
May 01/01R
CES (2) If the fault is at the First Officer station:
2_ If the fault continues:
- connect a new hand microphone to the Captain hand microphone
receptacle (19RN1) on the panel 17VU.
3_ If the fault continues:
- replace the RCPT-HAND MIC, CAPT (19RN1) (Ref. IPC 235108).
4_ If the fault continues:
- do a check and repair the wiring (between AMU (1RN) pins
AA/10F, 10G and pins 1 and 2 of the Captain hand microphone
receptacle (19RN1)) (Ref. ASM 23-51/02).
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 COMMUNICATIONS 通讯1(65)
