- install the DIR-CIDS (101RH) and DIR-CIDS (102RH) (Ref. AMM TASK 23-73-34-400-001).
- close these CBs: 49VU: 154RH COM/CIDS/DEU A ESS/LINE 1 49VU: 155RH COM/CIDS/DEU A ESS/LINE 2 121VU: 167RH COM NAV/CIDS/DEU A NORM/L AFT 121VU: 165RH COM NAV/CIDS/DEU A NORM/L MID 121VU: 163RH COM NAV/CIDS/DEU A NORM/L FWD
- do the CIDS BITE test through the MCDU/CFDS (Ref. AMM TASK 23-73-00-740-005).
1 If the CIDS BITE test gives the maintenance message DEU-A
_
200RH25:
- install a new DEU-A (200RH25) (Ref. AMM TASK 23-73-46-400-001).
「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 : 151-199, ∞∞23-73-00∞∞∞∞∞∞∞∞∞∞Page A216
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2 If the CIDS BITE test gives the maintenance message CIDS TOP
_
LINE 2 L:
- install the removed DEU-A (200RH25) (Ref. AMM TASK 23-73-46-400-001).
- do the steps 4. B. (5) (a) again for the subsequent DEUs until the maintenance message stops: (Ref. ASM 23-73/06) DEU-A (200RH21) DEU-A (200RH17) DEU-A (200RH11) DEU-A (200RH7) DEU-A (200RH3)
(b) If there is a short circuit:
- remove the DEU-A (200RH25) (Ref. AMM TASK 23-73-46-000-001)
- do a check for a short circuit again.
1 If there is no short circuit:
_
- install a new DEU-A (200RH25) (Ref. AMM TASK 23-73-46-400-001).
2 If the fault continues:
_
- disconnect the electrical connector 7253VC3 from the DEU mount 2014VU3 (Ref. AMM TASK 23-73-48-000-001).
- do a check for a short circuit again.
a If there is no short circuit:
_
- install a new DEU mount 2014VU3 (Ref. AMM TASK 23-73-48-000-001) and (Ref. AMM TASK 23-73-48-400-001).
b If the fault continues:
_
- remove the DEU-A (200RH21) (Ref. AMM TASK 23-73-46-000-001)
- do a check for a short circuit again.
- b.1. If there is no short circuit:
- install a new DEU-A (200RH21) (Ref. AMM TASK 23-73-46-400-001).
- b.2. If the fault continues:
- install the removed DEU-A (200RH25) (Ref. AMM TASK 23-73-46-400-001),
- reconnect the electrical connector to the DEU mount 2014VU3 (Ref. AMM TASK 23-73-48-400-001),
- disconnect the electrical connector 7213VC21 from the DEU mount 2010VU21 (Ref. AMM TASK 23-73-48-000-001),
- do a check for a short circuit again.
- b.2.1. If there is no short circuit:
- do a check for a short circuit at the connector 7213VC21 between pin 9 and GND (pin 11) and between pin 10 and GND (pin 11).
「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 : 151-199, ∞∞23-73-00∞∞∞∞∞∞∞∞∞∞Page A217
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- b.2.1.1. If there is a short circuit:
- repair the wiring between the DEU mount 2010VU21 and the DEU mount 2014VU3 (Ref. ASM 23-73/06).
- b.2.1.2. If there is no short circuit:
- install a new DEU mount 2010VU21 (Ref. AMM TASK 23-73-48-400-001).
- b.2.2. If there is a short circuit:
- install the removed DEU-A (200RH21) (Ref. AMM TASK 23-73-46-400-001),
- reconnect the electrical connector to the DEU mount 2010VU21 (Ref. AMM TASK 23-73-48-400-001),
- do the steps (4. B. (5) (b) 2 b) again for the subsequent DEUs and DEU mounts until the maintenance message stops: (Ref. ASM 23-73/06) DEU-A (200RH17) and DEU mount 2010VU17, DEU-A (200RH11) and DEU mount 2010VU11, DEU-A (200RH7) and DEU mount 2010VU7, DEU-A (200RH3) and DEU mount 2010VU3.
(6) If the resistance (line to line) is more than 200 ohms (open circuit):
- disconnect the electrical connector 7253VC3 from the DEU mount 2014VU3 (Ref. AMM TASK 23-73-48-000-001),
- make sure that the resistance (line to line) is not more than 200 ohms (open circuit) between: DEU mount 2014VU3 pin A/1 and pin A/2
(a) If there is an open circuit:
- install a new DEU mount 2014VU3 (Ref. AMM TASK 23-73-48-400-001)
(b) If there is no open circuit:
- reconnect the electrical connector to the DEU mount 2014VU3 (Ref. AMM TASK 23-73-48-400-001)
- disconnect the electrical connector 7213VC3 from the DEU mount 2010VU3 (Ref. AMM TASK 23-73-48-000-001),
- do a check of the wiring (continuity-check) between: DIR-CIDS (101RH) connector AA/J15 and the connector 7213VC3 pin A/1, DIR-CIDS (101RH) connector AA/K15 and the connector 7213VC3 pin A/2. 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2(81)
