(4) If the fault continues:
- remove the DIR-CIDS, 1 (101RH) (Ref. AMM TASK 23-73-34-000-001)
- open these CBs: 49VU: 154RH COM/CIDS/DEU A ESS/LINE 1 49VU: 155RH COM/CIDS/DEU A ESS/LINE 2 121VU: 164RH COM NAV/CIDS/DEU A NORM/R FWD 121VU: 166RH COM NAV/CIDS/DEU A NORM/R MID 121VU: 168RH COM NAV/CIDS/DEU A NORM/R AFT
- make sure that the resistance (line to line) at DIR-CIDS (101RH) and (102RH) connector AA/A15 and connector AA/B15 is between approx. 80 and 200 ohms (Ref. ASM 23-73/06).
(5) If the resistance (line to line) is between approx. 80 and 200 ohms:
- make sure that the resistance (line to GND) is not less than 50 ohms (short circuit) between: DIR-CIDS (101RH) and (102RH) connector AA/A15 and GND, DIR-CIDS (101RH) and (102RH) connector AA/B15 and GND. (Ref. ASM 23-73/06)
(a) If there is no short circuit:
- remove the DEU-A (200RH26) (Ref. AMM TASK 23-73-46-000-001)
- 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: 164RH COM NAV/CIDS/DEU A NORM/R FWD 121VU: 166RH COM NAV/CIDS/DEU A NORM/R MID 121VU: 168RH COM NAV/CIDS/DEU A NORM/R AFT
- 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
_
200RH26:
- install a new DEU-A (200RH26) (Ref. AMM TASK 23-73-46-400-001).
2 If the CIDS BITE test gives the maintenance message CIDS TOP
_
LINE 1 R:
「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 A232
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- install the removed DEU-A (200RH26) (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 (200RH22) DEU-A (200RH18) DEU-A (200RH12) DEU-A (200RH8) DEU-A (200RH4)
(b) If there is a short circuit:
- remove the DEU-A (200RH26) (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 (200RH26) (Ref. AMM TASK 23-73-46-400-001).
2 If the fault continues:
_
- disconnect the electrical connector 7253VC4 from the DEU mount 2014VU4 (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 2014VU4 (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 (200RH22) (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 (200RH22) (Ref. AMM TASK 23-73-46-400-001).
- b.2. If the fault continues:
- install the removed DEU-A (200RH22) (Ref. AMM TASK 23-73-46-400-001),
- reconnect the electrical connector to the DEU mount 2014VU4 (Ref. AMM TASK 23-73-48-400-001),
- disconnect the electrical connector 7213VC22 from the DEU mount 2010VU22 (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 7213VC22 between pin 9 and GND (pin 11) and between pin 10 and GND (pin 11).
- b.2.1.1. If there is a short circuit:
「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 A233
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- repair the wiring between the DEU mount 2010VU22 and the DEU mount 2014VU4 (Ref. ASM 23-73/06).
- b.2.1.2. If there is no short circuit:
- install a new DEU mount 2010VU22 (Ref. AMM TASK 23-73-48-400-001).
- b.2.2. If there is a short circuit:
- install the removed DEU-A (200RH22) (Ref. AMM TASK 23-73-46-400-001),
- reconnect the electrical connector to the DEU mount 2010VU22 (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 (200RH18) and DEU mount 2010VU18, DEU-A (200RH12) and DEU mount 2010VU12, DEU-A (200RH8) and DEU mount 2010VU8, DEU-A (200RH4) and DEU mount 2010VU4.
(6) If the resistance (line to line) is more than 200 ohms (open circuit):
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本文链接地址：A320 Trouble Shooting Manual 排故手册 COMMUNICATIONS 通讯2(88)
