Installation of the Wall Disconnect Box (WDB)

TASK 23-33-47-400-001-A
Installation of the Wall Disconnect Box (WDB)

FIN: 50MK1 ** ON A/C NOT FOR ALL
FIN: 50MK2 ** ON A/C NOT FOR ALL
FIN: 50MK3 ** ON A/C NOT FOR ALL
FIN: 50MK4 ** ON A/C NOT FOR ALL
FIN: 50MK5 ** ON A/C NOT FOR ALL
FIN: 50MK6 ** ON A/C NOT FOR ALL
FIN: 50MK7 ** ON A/C NOT FOR ALL
FIN: 50MK8 ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TASK 23-33-00-710-005-A	Operational Test of the Integrated In-Flight Entertainment (IFE) System
TASK 23-73-00-861-001-A	Energize the Cabin Intercommunication Data System (CIDS)
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power
TASK 25-23-44-000-001-A	Removal of the Lower Sidewall Panels (Dado Panels)
TASK 25-23-44-400-001-A	Installation of the Lower Sidewall Panels (Dado Panels)
Wall Disconnect Box

3. Job Set-up
Subtask 23-33-47-865-065-A ** ON A/C NOT FOR ALL

A. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
2000VU	PES-VIDEO-CONTROL-VCC-DS/C	21MH	C02
2000VU	PES-VIDEO-CONTROL-MAIN	20MH	C01
2000VU	PES-MUSIC-CABIN AFT-RH	25MK	D05
2000VU	PES-MUSIC-CABIN AFT-LH	22MK	D04
2000VU	PES-MUSIC-CABIN FWD-RH	24MK	D03
2000VU	PES-MUSIC-CABIN FWD-LH	23MK	D02
2000VU	PES-MUSIC-CTL	21MK	D01

Subtask 23-33-47-860-051-A ** ON A/C NOT FOR ALL

B. Preparation for Installation
(1) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
(2) Make sure that the applicable lower sidewall panel in the area of the related WDB is removed (Ref. AMM TASK 25-23-44-000-001).
(3) Make sure that the protection cap (9) of the related WDB (7) is removed.
(a) If necessary release the fasteners (8) and remove the protection cap (9).

4. Procedure
Subtask 23-33-47-420-050-AT ** ON A/C NOT FOR ALL

A. Installation of the Wall Disconnect Box (WDB)
(1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) Clean the component interfaces and the adjacent area.
(3) Do an inspection of the component interfaces and the adjacent area.
(4) Put the insulation strip (6), the WDB (7) and the protective cover (12) carefully into position.
(5) Install the screws (10) and the washers (11).
(6) Install the cable support assembly as follows:
(a) Assemble the screw (1), the washer (2), the cable support (3), the spacers (4) and (5).
(b) Put the assembly into the related screw holes of the protective cover (12)
(c) Tighten the screw (1).
(7) Remove the blanking caps from the electrical connectors (14).

CAUTION: DO NOT TOUCH THE CONNECTOR PINS OR OTHER CONDUCTORS ON THE COMPONENT DURING THE PROCEDURE. IF YOU TOUCH THESE CONDUCTORS, ELECTROSTATIC DISCHARGE CAN CAUSE DAMAGE TO COMPONENT.

(8) Make sure that the electrical connectors (14) are clean and in the correct condition.
(9) Connect the electrical connectors (14) to the WDB (7) as identified during the removal procedure.

CAUTION: MAKE SURE THAT THE SPRING LATCHES CORRECTLY HOLD THE CONNECTOR IN THE FULLY ENGAGED POSITION. THE SPRING LATCHES PREVENT UNWANTED MOVEMENT OF THE CONNECTOR, AND THUS THE RISK OF ARCING, WHICH CAN CAUSE DAMAGE TO THE UNIT.

(10) Safety the electrical connectors (14) with the spring latches (13).

Subtask 23-33-47-865-061-A ** ON A/C NOT FOR ALL

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
2000VU	PES-VIDEO-CONTROL-VCC-DS/C	21MH	C02
2000VU	PES-VIDEO-CONTROL-MAIN	20MH	C01
2000VU	PES-MUSIC-CABIN AFT-RH	25MK	D05
2000VU	PES-MUSIC-CABIN AFT-LH	22MK	D04
2000VU	PES-MUSIC-CABIN FWD-RH	24MK	D03
2000VU	PES-MUSIC-CABIN FWD-LH	23MK	D02
2000VU	PES-MUSIC-CTL	21MK	D01

Subtask 23-33-47-860-050-A ** ON A/C NOT FOR ALL

C. Preparation for the Test
(1) Energize the CIDS (Ref. AMM TASK 23-73-00-861-001).

Subtask 23-33-47-710-051-E ** ON A/C NOT FOR ALL

D. Do the operational test of the integrated In-Flight Entertainment (IFE) system (Ref. AMM TASK 23-33-00-710-005).

5. Close-up
Subtask 23-33-47-410-050-E ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Put the protection cap (9) in position and tighten the fasteners (8).
(3) Install the related lower sidewall panel (Ref. AMM TASK 25-23-44-400-001).

Subtask 23-33-47-862-050-A ** ON A/C NOT FOR ALL

B. De-energize the ground service network
(Ref. AMM TASK 24-42-00-862-001).

[Rev.10 from 2021] 2026.04.01 12:47:19 UTC