Installation of the Printed Circuit Board

TASK 23-73-49-400-001-A
Installation of the Printed Circuit Board

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

REFERENCE	QTY	DESIGNATION
98A25208001000	1	PULLEY ASSY-SEALING

B. Referenced Information

REFERENCE	DESIGNATION
TASK 23-73-00-740-005-A	BITE-Test of the Cabin Intercommunication Data System (CIDS) through the CFDS
TASK 23-73-00-861-001-A	Energize the Cabin Intercommunication Data System (CIDS)
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)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 33-25-00-710-001-A	Operational Test of the Passenger Reading Light System
Printed Circuit Board 2038VUA

3. Job Set-up
Subtask 23-73-49-860-051-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that aircraft electrical circuits are energized
(Ref. AMM TASK 24-41-00-861-002).
(2) Make sure that the applicable PSIU is open.
(3) Make sure that the lock-angles (5) are loosely fitted on the retainers (4).

Subtask 23-73-49-865-052-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	COM/CIDS/DEU A ESS/LINE 2	155RH	G05
49VU	COM/CIDS/DEU A ESS/LINE 1	154RH	G04
** ON A/C NOT FOR ALL
121VU	COM NAV/CIDS/DEU A NORM/R AFT	168RH	M14
121VU	COM NAV/CIDS/DEU A NORM/L AFT	167RH	M13
121VU	COM NAV/CIDS/DEU A NORM/R MID	166RH	M12
121VU	COM NAV/CIDS/DEU A NORM/L MID	165RH	M11
121VU	COM NAV/CIDS/DEU A NORM/R FWD	164RH	M10
121VU	COM NAV/CIDS/DEU A NORM/L FWD	163RH	M09
** ON A/C NOT FOR ALL
121VU	COM NAV/CIDS/DEU A NORM/R MID	166RH	M13
121VU	COM NAV/CIDS/DEU A NORM/L MID	165RH	M12
121VU	COM NAV/CIDS/DEU A NORM/R FWD	164RH	M11
121VU	COM NAV/CIDS/DEU A NORM/L FWD	163RH	M10
** ON A/C NOT FOR ALL
2000VU	PASSENGER READING LIGHT	6LW	G06
2000VU	PASSENGER READING LIGHT	5LW	G05
2000VU	PASSENGER READING LIGHT	4LW	G04
2000VU	PASSENGER READING LIGHT	3LW	G03
2000VU	PASSENGER READING LIGHT	2LW	G02
2000VU	PASSENGER READING LIGHT	1LW	G01

4. Procedure
Subtask 23-73-49-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Printed Circuit Board (PCB) with Bulbs or LEDs and the Passenger Call Switches

Printed Circuit Board 2038VUA ** ON A/C NOT FOR ALL

(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Install the PCB (1) with the Passenger Call Switches on it.
(4) Put the retainers (4) in position.
(5) Apply pressure to the lock-angels (5) on the two sides of the retainers (4) and push it into the retaining groove.
(6) Click the clip of the lock-angle (5) into the retaining groove.
(7) Remove the CAP-BLANKING from each electrical connector and receptacle.
(8) Make sure that all the electrical connections are clean and in the correct condition.
(9) Connect the electrical connector (2) to the PCB (1).
(10) Make sure that the work area is clean and clear of tools and other items.
(11) Lift the Passenger Service Information Unit (PSIU) (3) and engage it on the mounting rail (6).
(12) Install the section hose (7) with the 98A25208001000 PULLEY ASSY-SEALING on the mounting rail (6).
(13) Make sure that the section hose is not stretched.
(14) Move the pulley assembly quickly forward and then rearward to prevent this.

Subtask 23-73-49-865-057-A ** ON A/C NOT FOR ALL

B. Remove the safety clips and tags and close these circuit breakers in this sequence:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
2000VU	PASSENGER READING LIGHT	6LW	G06
2000VU	PASSENGER READING LIGHT	5LW	G05
2000VU	PASSENGER READING LIGHT	4LW	G04
2000VU	PASSENGER READING LIGHT	3LW	G03
2000VU	PASSENGER READING LIGHT	2LW	G02
2000VU	PASSENGER READING LIGHT	1LW	G01
** ON A/C NOT FOR ALL
121VU	COM NAV/CIDS/DEU A NORM/R AFT	168RH	M14
121VU	COM NAV/CIDS/DEU A NORM/L AFT	167RH	M13
** ON A/C NOT FOR ALL
121VU	COM NAV/CIDS/DEU A NORM/R MID	166RH	M13
** ON A/C NOT FOR ALL
121VU	COM NAV/CIDS/DEU A NORM/R MID	166RH	M12
** ON A/C NOT FOR ALL
121VU	COM NAV/CIDS/DEU A NORM/L MID	165RH	M12
** ON A/C NOT FOR ALL
121VU	COM NAV/CIDS/DEU A NORM/L MID	165RH	M11
** ON A/C NOT FOR ALL
121VU	COM NAV/CIDS/DEU A NORM/R FWD	164RH	M11
** ON A/C NOT FOR ALL
121VU	COM NAV/CIDS/DEU A NORM/R FWD	164RH	M10
** ON A/C NOT FOR ALL
121VU	COM NAV/CIDS/DEU A NORM/L FWD	163RH	M10
** ON A/C NOT FOR ALL
121VU	COM NAV/CIDS/DEU A NORM/L FWD	163RH	M09
** ON A/C NOT FOR ALL
49VU	COM/CIDS/DEU A ESS/LINE 2	155RH	G05
49VU	COM/CIDS/DEU A ESS/LINE 1	154RH	G04

Subtask 23-73-49-860-052-A ** ON A/C NOT FOR ALL

C. Energize the aircraft electrical circuits
(Ref. AMM TASK 23-73-00-861-001)
(1) Energize the passenger reading light system.
(Ref. AMM TASK 33-25-00-710-001)
(2) Make sure that at least one cabin door is open.

Subtask 23-73-49-869-052-A ** ON A/C NOT FOR ALL

D. Aircraft Maintenance Configuration
(1) Make sure that the Cabin Intercommunication Data System (CIDS) is energized
(Ref. AMM TASK 23-73-00-861-001).
(2) Do the BITE test of the Cabin Intercommunication Data System (CIDS) (Ref. AMM TASK 23-73-00-740-005).

Subtask 23-73-49-710-050-A ** ON A/C NOT FOR ALL

E. Do this test

ACTION	RESULT
1.In the cabin, on the related Passenger Service Information Unit (PSIU):	On the related PSIU:
Push the passenger call pushbutton switch.	The seat row identification flashes.
Push to reset the passenger call pushbutton switch again.	The seat row identification stays on.
Push all the reading light pushbutton switches.	All the reading lights come on.
Push to reset all the reading light pushbutton switches again.	All the reading lights go off.
2.In the cockpit, on the overhead panel 25VU:	On the related PSIU:
Set the SEAT BELTS switch to the ON position.	The Fasten Seat Belt (FSB) sign comes on.
Set the NO SMOKING switch to the ON position.	The No Smoking (NS) sign comes on.
Set the SEAT BELTS and the NO SMOKING switch to the OFF position.	The FSB and NS sign goes off.

Subtask 23-73-49-710-050-B ** ON A/C NOT FOR ALL

E. Do this test

ACTION	RESULT
1.In the cabin, on the related Passenger Service Information Unit (PSIU):	On the related PSIU:
	The NO SMOKING (NS) sign is on.
Push the passenger call pushbutton switch.	The seat row identification flashes.
Push to reset the passenger call pushbutton switch again.	The seat row identification stays on.
Push all the reading light pushbutton switches.	All the reading lights come on.
Push to reset all the reading light pushbutton switches again.	All the reading lights go off.
2.In the cockpit, on the overhead panel 25VU:	On the related PSIU:
Set the SEAT BELTS switch to the ON position.	The Fasten Seat Belt (FSB) sign comes on.
Set the NO SMOKING switch to the ON position.	The No Smoking (NS) sign comes on.
Set the SEAT BELTS and the NO SMOKING switch to the OFF position.	The FSB and NS sign goes off. NOTE: On all PSIUs, the NS sign comes on while CIDS operates and stays on until CIDS is off.

5. Close-up
Subtask 23-73-49-862-050-A ** ON A/C NOT FOR ALL

A. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002)

[Rev.10 from 2021] 2026.03.31 23:18:57 UTC