Removal of the Passenger Interface and Supply Adapter

TASK 23-73-41-000-001-A
Removal of the Passenger Interface and Supply Adapter

FIN: 602RH ** ON A/C NOT FOR ALL

1. Reason for the Job
Self Explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	2	BAG - ANTISTATIC
No specific	AR	CAP - BLANKING
No specific	1	PIN - NON METALLIC

B. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
Passenger Interface and Supply Adapter (PISA) with Audio Function - Removal/Installation
Passenger Interface and Supply Adapter (PISA) without Audio Function - Removal/Installation

3. Job Set-up
Subtask 23-73-41-861-050-A ** ON A/C NOT FOR ALL

A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 23-73-41-865-050-A ** ON A/C NOT FOR ALL

B. Open, safety and tag these circuit breakers in this sequence:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	COM/CIDS/DIR ESS/1	150RH	G01
49VU	COM DIR ESS/2	157RH	G02
49VU	AIR COND/CIDS/SDF/DIR1 ESS	15WH	C05
49VU	AIR COND/CIDS/SDF/DIR2 ESS	18WH	C06
121VU	COM NAV/CIDS/DIR NORM/1	151RH	M06
121VU	COM NAV/CIDS/DIR NORM/2	156RH	M07
122VU	AIR COND/CIDS/SDF/DIR NORM/2	14WH	T18
122VU	AIR COND/CIDS/SDF/DIR NORM/1	17WH	T17
49VU	COM/CIDS/DEU A ESS/FWD R	158RH	HA10
49VU	COM/CIDS/DEU A ESS/FWD L	159RH	HA09
49VU	COM/CIDS/DEU A ESS/AFT R	172RH	HA12
49VU	COM/CIDS/DEU A ESS/AFT L	179RH	HA11
49VU	COM / CIDS / DEU A ESS / MID L	195RH	G04
49VU	COM / CIDS / DEU A ESS / MID R	196RH	G05
121VU	COM NAV/CIDS/DEU A NORM/L FWD	163RH	M10
121VU	COM NAV/CIDS/DEU A NORM/R FWD	164RH	M11
2001VU	CIDS-DEU A NORM-AFT-LH	173RH	C06
2001VU	CIDS-DEU A NORM-AFT-RH	174RH	C07
2001VU	CIDS-DEU A NORM-MID-LH	197RH	C04
2001VU	CIDS-DEU A NORM-MID-RH	198RH	C05
2000VU	PASSENGER READING LIGHT	1LW	G01
2000VU	PASSENGER READING LIGHT	2LW	G02
2000VU	PASSENGER READING LIGHT	3LW	G03
2000VU	PASSENGER READING LIGHT	4LW	G04
2000VU	PASSENGER READING LIGHT	5LW	G05
2000VU	PASSENGER READING LIGHT	6LW	G06

4. Procedure
Subtask 23-73-41-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Passenger Interface and Supply Adapter (PISA) with audio function and the Passenger Call Switches
(1) Open the Passenger Service Unit (PSU).
(a) Remove the section hose (1) from one side of the mounting rail (2).
(b) Pull and lower the PSU (3).

NOTE: Be careful when you work on the lowered PSU. If you use too much force, it is easy to move the PSU in the mounting rail too much. This can cause damage to the hinge in the mounting rail.

(2) Disconnect the electrical connectors.

CAUTION: OBEY THESE PRECAUTIONS TO PREVENT ELECTROSTATIC DISCHARGE (ESD) DAMAGE TO THE COMPONENTS:

STAY ON A CONDUCTIVE SURFACE THAT IS ELECTRICALLY GROUNDED.
USE A CONDUCTIVE WRIST-STRAP THAT IS ELECTRICALLY GROUNDED. (CONNECTED TO A BONDING-POINT NEAR THE WORK AREA).
BEFORE YOU USE THE TOOLS, MOMENTARILY HOLD THEM AGAINST AN ELECTRICAL GROUND TO RELEASE STATIC ELECTRICITY.

CAUTION: MAKE MATCH MARKS ON ALL THE ELECTRICAL WIRES BEFORE YOU DISCONNECT THEM. INCORRECT CONNECTION OF WIRES WILL CAUSE DAMAGE TO EQUIPMENT.

(a) Disconnect the electrical connectors (8, 8A, 8B) from the vertical PCB of the PISA (9a).
(b) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Remove the PISA.

CAUTION: BE CAREFUL WHEN YOU REMOVE OR INSTALL A PRINTED CIRCUIT BOARD. DO NOT TOUCH IT DIRECTLY. IT IS EASY TO CAUSE DAMAGE TO THIS COMPONENT.

(a) Cut and remove the tie wraps (5) to release the cable harness (6) from the cover (4).
(b) Discard the tie wraps (5).
(c) Carefully pull the sidewalls of the cover (4) out and release them from the latches (7) of the PSU (3). Then lift the cover (4) and remove it.
(d) Remove the plastic rivets (10) with a PIN - NON METALLIC.
(e) Hold the vertical PCB (9A) on its sides and remove it.
(f) Put the PCB (9A) into a BAG - ANTISTATIC.
(g) Release the latches (11) of the PSU (3).
(h) Hold the horizontal PCB (9) with the Passenger Call Switches on it on its sides and remove it from the PSU (3).
(i) Put the PCB (9) into a BAG - ANTISTATIC.

Subtask 23-73-41-020-051-A ** ON A/C NOT FOR ALL

B. Removal of the Passenger Interface and Supply Adapter (PISA) without audio function and the Passenger Call Switches
(1) Open the Passenger Service Unit (PSU).
(a) Remove the section hose (1) from one side of the mounting rail (2).
(b) Pull and lower the PSU (3).

NOTE: Be careful when you work on the lowered PSU. If you use too much force, it is easy to move the PSU in the mounting rail too much. This can cause damage to the hinge in the mounting rail.

(2) Disconnect the electrical connectors.

CAUTION: OBEY THESE PRECAUTIONS TO PREVENT ELECTROSTATIC DISCHARGE (ESD) DAMAGE TO THE COMPONENTS:

STAY ON A CONDUCTIVE SURFACE THAT IS ELECTRICALLY GROUNDED.
USE A CONDUCTIVE WRIST-STRAP THAT IS ELECTRICALLY GROUNDED. (CONNECTED TO A BONDING-POINT NEAR THE WORK AREA).
BEFORE YOU USE THE TOOLS, MOMENTARILY HOLD THEM AGAINST AN ELECTRICAL GROUND TO RELEASE STATIC ELECTRICITY.

CAUTION: MAKE MATCH MARKS ON ALL THE ELECTRICAL WIRES BEFORE YOU DISCONNECT THEM. INCORRECT CONNECTION OF WIRES WILL CAUSE DAMAGE TO EQUIPMENT.

(a) Disconnect the electrical connectors (8, 8A) from the vertical PCB of the PISA (9A).
(b) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Remove the PISA.

CAUTION: BE CAREFUL WHEN YOU REMOVE OR INSTALL A PRINTED CIRCUIT BOARD. DO NOT TOUCH IT DIRECTLY. IT IS EASY TO CAUSE DAMAGE TO THIS COMPONENT.

[Rev.10 from 2021] 2026.04.02 06:12:33 UTC