(e)
 Put blanking caps on the disconnected electrical connectors.

 (f)
 Carefully remove the plastic rivets (10) with a PIN - NON METALLIC.

 (g)
 Carefully lift the two vertical PCBs (9A) from the horizontal switch-panel-PCB (9).

 NOTE : Use the spacers to lift the PCBs. Try not to touch the
____
 PCBs directly.

 (h) Carefully release the latches (11) of the PSU (3) and lift the horizontal switch-panel-PCB (9) from the PSU (3).
 Subtask 23-73-41-020-051
 B. Removal of the Passenger Interface and Supply Adapter (PISA) without Audio Function
 (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 related PSU (3).

 (2)
 Remove the Passenger Interface and Supply Adapter (PISA) CAUTION : BE CAREFUL WHEN YOU REMOVE OR INSTALL THE PASSENGER

_______ INTERFACE AND SUPPLY ADAPTER. IT IS EASY TO CAUSE DAMAGE TO THIS COMPONENT.
 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.
 (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.

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 Passenger Interface and Supply Adapter (PISA) with Audio Function -Removal/Installation Figure 401/TASK 23-73-41-991-001- 12 (SHEET 1)
R 1EFF : 106-149, 301-399, 401-499, 1 23-73-41Page 406 1 1 Aug 01/05 1 1 1CES 1

 Passenger Interface and Supply Adapter (PISA) with Audio Function -Removal/Installation Figure 401/TASK 23-73-41-991-001- 22 (SHEET 2)
R 1EFF : 106-149, 301-399, 401-499, 1 23-73-41Page 407 1 1 Aug 01/05 1 1 1CES 1

 Passenger Interface and Supply Adapter (PISA) without Audio Function -Removal/Installation Figure 402/TASK 23-73-41-991-002- 12 (SHEET 1)
R 1EFF : 106-149, 301-399, 401-499, 1 23-73-41Page 408 1 1 Aug 01/05 1 1 1CES 1

 Passenger Interface and Supply Adapter (PISA) without Audio Function -Removal/Installation Figure 402/TASK 23-73-41-991-002- 22 (SHEET 2)
R 1EFF : 106-149, 301-399, 401-499, 1 23-73-41Page 409 1 1 Aug 01/05 1 1 1CES 1 CAUTION : MAKE MATCH MARKS ON ALL THE ELECTRICAL WIRES BEFORE YOU

_______ DISCONNECT THEM. INCORRECT CONNECTION OF WIRES WILL CAUSE DAMAGE TO EQUIPMENT.
 (d)
 Identify the electrical connectors (8, 8A) and carefully disconnect them from the vertical Printed Circuit Board (PCB) of the PISA (9A).

 (e)
 Put blanking caps on the disconnected electrical connectors.

 (f)
 Carefully remove the plastic rivets (10) with a PIN - NON METALLIC.

 (g)
 Carefully lift the vertical PCB (9A) from the horizontal switch-panel-PCB (9).

 NOTE : Touch the edges of the vertical PCB (9) to lift it. Try
____
 not to touch the PCBs directly.

 (h) Carefully release the latches (11) of the PSU (3) and lift the horizontal switch-panel-PCB (9) from the PSU (3).
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 TASK 23-73-41-400-001
 Installation of the Passenger Interface and Supply Adapter (PISA)

 1.
 Reason for the Job

__________________
 Self Explanatory

 2.
 Job Set-up Information

______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific tie wraps 98A25207503000 1 PULLEY ASSEMBLY - SEALING CORD
 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
23-73-00-740-010 Interface and Power-Up Test of the Cabin Intercommunication Data System (CIDS) via the CFDS 24-42-00-861-001 Energize the Ground Service Network from the External Power 24-42-00-862-001 De-energize the Ground Service Network Supplied from
 the External Power 23-73-41-991-001 Fig. 401 23-73-41-991-002 Fig. 402
　
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