「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 : 401-499, ∞∞31-63-82∞∞∞∞∞∞∞∞∞∞Page 269
 Aug 01/05 CES (3) If the fault continues:

 - do a check and repair the wiring: from the upper ECAM DU(4WT1) pin AA-39 to the ECAM CTL-PNL (6WT) pin B-B from the upper ECAM DU(4WT1) pin AA-40 to the ECAM CTL-PNL (6WT) pin B-C from the upper ECAM DU(4WT1) pin AA-36 to the ECAM CTL-PNL (6WT) pin B-U
 (a) If the wiring is correct, replace the CTL PNL-ECAM (6WT).
 5. Close-up
________
 A. CLose-up
 - Do the EIS Stop Procedure (Ref. AMM TASK 31-60-00-860-002).

 Blank Screen on the Lower ECAM DU
 1. Possible Causes
_______________
 - DU-ECAM, LOWER (4WT2)

 - EIS/ECAM DU/LOWER/SWTG (24WT2)

 - CTL PNL-ECAM (6WT)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 31-60-00-860-001 EIS Start Procedure AMM 31-60-00-860-002 EIS Stop Procedure AMM 31-63-22-000-001 Removal of the Display Unit
 (2WT1,2WT2,3WT1,3WT2,4WT1,4WT2) AMM 31-63-22-400-001 Installation of the Display Unit
 (2WT1,2WT2,3WT1,3WT2,4WT1,4WT2) ASM 31-61/01 ASM 31-61/02 ASM 31-68/01
 3. Fault Confirmation
__________________
 A. Job Set-up
 (1) Do the EIS start procedure (Ref. AMM TASK 31-60-00-860-001).
 4. Fault Isolation
_______________
 A. If the operational image is shown on the lower ECAM DU :
 - no maintenance action is necessary.
 B. If a maintenance message is shown on a black screen
 - do the fault isolation procedure relative to this message.

 C. If a blank screen is shown on the lower ECAM DU:
 - replace the DU-ECAM, LOWER (4WT2) (Ref. AMM TASK 31-63-22-000-001) and (Ref. AMM TASK 31-63-22-400-001).
 (1) If the fault continues:
 (a) Do a check for 115VAC at pin AA-79 of the lower ECAM DU (Ref. ASM 31-61/02)
 1 If there is no 115VAC:
_

 - check the wiring from the lower ECAM SPLY-C/B (13WT2) to the lower ECAM DU (4WT2) pin AA-79 (Ref. ASM 31-68/01)
 a If there is no continuity:
_ - repair the wiring

 b If there is continuity:
_ - replace the DU-ECAM, LOWER (4WT2).

 2 If there is 115VAC:
_

 - do a check for a ground signal at pin A-77 of the lower ECAM DU
 a If there is no ground signal:
_

 - check and repair the wiring from the lower ECAM-DU pin AA-77 to the the ground terminal
 b If there is a ground signal:
_

 - do a check for 28VDC at the lower ECAM-DU pin AA-81 . if there is no 28VDC, check and repair the wiring from the lower ECAM-DU pin AA-81 to the lower ECAM-SWTG C/B (24WT2) . if there is 28VDC, replace the EIS/ECAM DU/LOWER/SWTG (24WT2) (Ref. ASM 31-61/01) .
 (2) If the fault continues:
 - do a check for a ground signal at pin AA-75 of the lower ECAM DU
 (a) If there is a ground signal:
 - make sure there is no ground signal at pin A-D of the potentiometer (6WT)
 1 If there is no ground signal:
_

 - check and repair the wiring from the lower ECAM CTL-PNL (6WT) pin A-D to the lower ECAM DU (4WT2) pin AA-75.
 2 If there is a ground signal:
_ - replace the CTL PNL-ECAM (6WT).

 (3) If the fault continues:
 - do a check and repair the wiring: from the lower ECAM DU(4WT2) pin AA-39 to the lower ECAM CTL-PNL (6WT) pin A-B from the lower ECAM DU(4WT2) pin AA-40 to the lower ECAM CTL-PNL (6WT) pin A-C from the lower ECAM DU(4WT2) pin AA-36 to the lower ECAM CTL-PNL (6WT) pin A-U
 (a) If the wiring is correct, replace the CTL PNL-ECAM (6WT) (Ref. ASM 31-68/01) .
 5. Close-up
________
 A. CLose-up
 - Do the EIS Stop Procedure (Ref. AMM TASK 31-60-00-860-002).

 Loss of the ARINC 629 link from the CAPT DU's to the DMC1
 1. Possible Causes
_______________
 - DMC-1 (1WT1)

 - EIS/DMC1/SPLY (10WT1)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
　
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