- the WDB (50MKx) connector A/1 and the WDB (50MKx) connector D/1.

 - the WDB (50MKx) connector A/2 and the WDB (50MKx) connector D/2.

 (f) If the fault continues:

 - do a check and repair as necessary the wiring between the WDB (50MKx) next to the MUX-PES, MAIN (8MK) and the MUX-PES, MAIN (8MK) on the left side of the cabin (Ref. ASM 23-33/02) and (Ref. ASM 23-33/02):
 - the WDB (50MKx) connector D/13 and the MUX-PES, MAIN (8MK) connector AA/A8.
 「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 : 051-099, 106-149, 201-299, 301-399, ∞∞23-33-00∞∞∞∞∞∞∞∞∞∞Page 221
 May 01/05 CES

 - the WDB (50MKx) connector D/14 and the MUX-PES, MAIN (8MK) connector AA/B8.

 - the WDB (50MKx) connector D/15 and the MUX-PES, MAIN (8MK) connector AA/C8.

 - the WDB (50MKx) connector D/8 and the MUX-PES, MAIN (8MK) connector AA/D7.

 - the WDB (50MKx) connector D/1 and the MUX-PES, MAIN (8MK) connector AA/A9.

 - the WDB (50MKx) connector D/2 and the MUX-PES, MAIN (8MK) connector AA/B9.

 (g) If the fault continues:

 - replace the SEAT ELECTRONIC BOX (100MKxx) in the first seat row on the left side of the cabin (Ref. AMM TASK 23-33-46-000-001) and (Ref. AMM TASK 23-33-46-400-001).

 (h) If the fault continues:

 - replace the WALL DISCONNECT BOX (50MKx) that serves the SEB (100MKxx) in the first seat row on the left side of the cabin (Ref. AMM TASK 23-33-47-000-001) and (Ref. AMM TASK 23-33-47-400-001).

 (i) If the fault continues and:

 1 If another WDB (50MKx) is connected in line to the MUX-PES,
_ MAIN (8MK) on the left side of the cabin :
 - replace that WALL DISCONNECT BOX (50MKx) (Ref. AMM TASK 23-33-47-000-001) and (Ref. AMM TASK 23-33-47-400-001).
 (j) If the fault continues:

 - do para. above again until the WDB (50MKx) next to the MUX-PES, MAIN (8MK) is replaced (Ref. AMM TASK 23-33-47-000-001) and (Ref. AMM TASK 23-33-47-400-001).

 (k) If the fault continues:

 - replace the MUX-PES, MAIN (8MK), (Ref. AMM TASK 23-33-31-000-001) and (Ref. AMM TASK 23-33-31-400-001).
 (2) If no SEB TERMINATOR (101MKxx) is connected to the SEB (100MKxx) in the first seat row on the left side of the cabin:
 - do a check for the functional condition and the correct installation of the SEB TERMINATOR (101MKxx) on the WALL DISCONNECT BOX (50MKx) (WDB) which is connected to the SEB (100MKxx) in the first seat row on the left side of the cabin (Ref. ASM 23-33/03).
 (a) If the fault continues and:
 1 If another/other SEB TERMINATOR(s) (101MKxx) is/are connected
_ to a/the WALL DISCONNECT BOX(es) (50MKx) (WDB) in line to the MUX-PES, MAIN (8MK)
 - repeat the check above on that/these SEB TERMINATOR(s) (101MKxx) (Ref. ASM 23-33/03).
 「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 : 051-099, 106-149, 201-299, 301-399, ∞∞23-33-00∞∞∞∞∞∞∞∞∞∞Page 222
 May 01/05 CES

 (b) If the fault continues:

 - do a check and repair as necessary the wiring between the SEB (100MKxx) in the first seat row on the left side of the cabin and the WDB (50MKx) that serves that SEB (100MKxx) (Ref. ASM 23-33/03):
 - the WDB (50MKx) connector P1/6 and the SEB (100MKxx) connector P2/6.

 - the WDB (50MKx) connector P1/9 and the SEB (100MKxx) connector P2/9.

 - the WDB (50MKx) connector P1/5 and the SEB (100MKxx) connector P2/5.

 - the WDB (50MKx) connector P1/7 and the SEB (100MKxx) connector P2/7.

 - the WDB (50MKx) connector P1/8 and the SEB (100MKxx) connector P2/8.

 (c) If the fault continues:

 - do a check and repair as necessary the wiring between all WDBs (50MKx) from the WDB (50MKx) that serves the checked SEB (100MKxx) and the WDB (50MKx) next to the MUX-PES, MAIN (8MK) (Ref. ASM 23-33/02):
 - the WDB (50MKx) connector A/13 and the WDB (50MKx) connector D/13.

 - the WDB (50MKx) connector A/14 and the WDB (50MKx) connector D/14.

 - the WDB (50MKx) connector A/15 and the WDB (50MKx) connector D/15.

 - the WDB (50MKx) connector A/8 and the WDB (50MKx) connector D/8.

 - the WDB (50MKx) connector A/1 and the WDB (50MKx) connector D/1.

 - the WDB (50MKx) connector A/2 and the WDB (50MKx) connector D/2.

 (d) If the fault continues:

 - do a check and repair as necessary the wiring between the WDB (50MKx) next to the MUX-PES, MAIN (8MK) and the MUX-PES, MAIN (8MK) on the left side of the cabin (Ref. ASM 23-33/02) and (Ref. ASM 23-33/02):
　
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