(b) If there is a short circuit:

 - install the removed DEU-A (200RH23) (Ref. AMM TASK 23-73-46-400-001).

 - diconnect the electrical connector 7253VC1 from the DEU mount 2014VU1 (Ref. ASM 23-73/06),

 - do a check for a short circuit again.

 1 If there is a short circuit:
_
 - reconnect the electrical connector to the DEU mount 2014VU1 (Ref. AMM TASK 23-73-48-400-001),

 - do the steps 4. B. (7) again for the subsequent DEUs and DEU mounts until the maintenance message stops: (Ref. ASM 23-73/06)

 「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 298
 Aug 01/05R CES

 DEU-A (200RH19) and DEU mount 2010VU19, DEU-A (200RH13) and DEU mount 2010VU13, DEU-A (200RH9) and DEU mount 2010VU9, DEU-A (200RH5) and DEU mount 2010VU5, DEU-A (200RH1) and DEU mount 2010VU1.
 2 If there is no short circuit:
_
 - do a check for a short circuit at the disconnected connector between the pins A/9 and A/10 (Ref. ASM 23-73/06)
 a If there is a short circuit:
_
 - repaire the wiring between the related DEU mount 2010VUxx and the DEU mount 2014VUxx/2010VUxx (Ref. ASM 23-73/06).
 b If there is no short circuit:
_
 - install a new DEU mount 2014VU1 (Ref. AMM TASK 23-73-48-400-001).
 **ON A/C 301-399,
 B. If the Interface and Power-Up Test gives the maintenance message CIDS TOP BUS 1L/DIR1 (101RH):
 - remove the DIR-CIDS, 1 (101RH) (Ref. AMM TASK 23-73-34-000-001),

 - make sure that at least one cabin door is open,

 - close these CBs:
 49VU: 157RH COM/CIDS/DIR/2
 49VU: 18WH AIR COND/CIDS/SDF/DIR 2 ESS,
 120VU:156RH COM NAV/CIDS/DIR/NORM/2
 122VU: 14WH AIR COND/CIDS/SDF/DIR NORM/2

 - wait for approx. 120 s,

 - do the CIDS2 Interface and Power-Up Test via the MCDU/CFDS.

 (1) If the CIDS2 Interface and Power-Up Test is OK:

 - install a new DIR-CIDS, 1 (101RH) (Ref. AMM TASK 23-73-34-400-001).

 (2) If the fault continues:

 - remove the DIR-CIDS, 2 (102RH) (Ref. AMM TASK 23-73-34-000-001).

 - during the installation of the DIR-CIDS, 1 (101RH) do not close these CBs: 49VU: 157RH COM/CIDS/DIR/2 49VU: 18WH AIR COND/CIDS/SDF/DIR 2 ESS, 120VU:156RH COM NAV/CIDS/DIR/NORM/2 122VU: 14WH AIR COND/CIDS/SDF/DIR NORM/2

 - install the DIR-CIDS, 1 (101RH) (Ref. AMM TASK 23-73-34-400-001).

 - do the Interface and Power-Up Test via the MCDU/CFDS.

 (3) If the Interface And Power-Up Test is OK:

 - install a new DIR-CIDS, 2 (102RH) (Ref. AMM TASK 23-73-34-400-001).
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 151-199, 301-399, ∞∞23-73-00∞∞∞∞∞∞∞∞∞∞Page 299
 Aug 01/05 CES

 (4) If the fault continues:

 - remove the DIR-CIDS, 1 (101RH) (Ref. AMM TASK 23-73-34-000-001)

 - open these CBs: 49VU: 159RH COM NAV/CIDS/DEU A ESS/FWD L 49VU: 195RH COM NAV/CIDS/DEU A ESS/MID L 49VU: 179RH COM NAV/CIDS/DEU A ESS/AFT L 120VU: 163RH COM NAV/CIDS/DEU A NORM/L FWD 2001VU: 197RH DEU A NORM L MID 2001VU: 173RH DEU A NORM L AFT

 - make sure that the resistance (line to line) at DIR-CIDS, 1 (101RH) and DIR-CIDS, 2 (102RH) connector AA/D15 and connector AA/E15 is between approx. 80 and 120 ohms (Ref. ASM 23-73/06).

 (5) If the resistance (line to line) is between approx. 80 and 120 ohms:

 - make sure that the resistance (line to GND) is not less than 200 ohms (short circuit) between: DIR-CIDS, 1 (101RH) and DIR-CIDS, 2 (102RH) connector AA/D15 and GND, DIR-CIDS, 1 (101RH) and DIR-CIDS, 2 (102RH) connector AA/E15 and GND. (Ref. ASM 23-73/06)
 (a) If there is no short circuit:
 - remove the DEU-A (200RH15) (Ref. AMM TASK 23-73-46-000-001)

 - install the DIR-CIDS, 1 (101RH) and DIR-CIDS, 2 (102RH) (Ref. AMM TASK 23-73-34-400-001).

 - close these CBs: 49VU: 159RH COM NAV/CIDS/DEU A ESS/FWD L 49VU: 195RH COM NAV/CIDS/DEU A ESS/MID L 49VU: 179RH COM NAV/CIDS/DEU A ESS/AFT L 120VU: 163RH COM NAV/CIDS/DEU A NORM/L FWD 2001VU: 197RH DEU A NORM L MID 2001VU: 173RH DEU A NORM L AFT

 - do the CIDS Interface and Power-Up Test via the MCDU/CFDS (Ref. AMM TASK 23-73-00-740-010).

 1 If the CIDS Interface and Power-UP Test gives the maintenance
_
 message DEU-A (200RH15):

 - install a new DEU-A (200RH15) (Ref. AMM TASK 23-73-46-400-001).
 2 If the CIDS Interface and Power-Up Test gives the maintenance
　
中國(guó)航空網(wǎng) www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：A320 Trouble Shooting Manual 排故手冊(cè) COMMUNICATIONS 通訊2(73)