Fresh Air Outlet Panel (PSU) - Component Location
 Figure 002
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 Reading Light Panel (PSU) - Component Location
 Figure 003
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 Class Divider Assy - Component Location Figure 004
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 For access to these system interfaces remove the related PSIU panels and/or the adjacent filler panels.
 6. Component Description_____________________
 A. Passenger Service Units (PSUs)
 Each PSU has:
 -an attendant call panel (Ref. 23-73-00),
 -
a reading light panel (Ref. 33-25-00),

 -
a fresh air outlet panel (Ref. 21-24-00),

 -an emergency oxygen mask container (Ref. 35-20-00).
 (1) Attendant Call Panel
 Each Panel has:
 -an attendant call/reset push button,
 -reading light ON/OFF switchs,
 -
lighted seat numbers and seat row number,

 -
lighted SMOKER/NO SMOKER sign.

 (2)
 Reading Light Panel

 The number of reading lights on each reading light panel agree with the customer seat layout. Each reading light is adjustable and can be switched ON or OFF independently with its related switch. The Reading light switches are located on the attendant call panel.

 (3)
 Fresh Air Outlet Panel

 The number of fresh air outlets on each fresh air outlet panel agree with the customer seat layout. Each fresh air outlet is adjustable and can be opened or closed independently.

 (4)
 Emergency Oxygen Mask Container

 The number of emergency oxygen masks in each container agree with the customer seat layout. The oxygen masks fall from the container immediatley, if there is a sudden decrease in cabin pressure.
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 B. Passenger Information Units (PIUs) (Ref. 23-73-00)
 Each PIU is a single panel which has:

 -
a loudspeaker,

 -
a lighted sign FASTEN SEAT BELT,

 -
a lighted sign NO SMOKING.
 The PIUs are installed only above every second seat row.

 7. Operation/Control and Indication
________________________________
 The PSIUs can be operated by the Passengers/attendants as follows:

 A. Attendant Call
 To call an attendant the attendant call/reset pushbutton must be pushed.
 This gives a signal tone and a visual sign on the attendant call panel.
 The attendant call/reset pushbutton also comes on.
 To cancel the call the attendant call/reset pushbutton must be pushed
 again.

 B. Lighted Signs and Loudspeakers
 For information about the seat numbers and seat row numbers, the FASTEN SEAT BELT and NO SMOKING signs, and the loudspeakers of the PSIUs refer to 23-30-00 and 33-20-00.
 C. Fresh Air Outlets
 To open the fresh air outlet, turn the nozzle ring to the left. Then you can adjust the fresh air stream when you turn the nozzle housing. To close the fresh air outlet, turn the nozzle ring to the right.
 D. Reading Lights
 A reading light comes on, when you push the related switch on the attendant call panel. The light goes off, when you push the switch again.
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 PASSENGER SERVICE/INFORMATION UNIT (PSIU) - REMOVAL/INSTALLATION
________________________________________________________________ TASK 25-25-11-000-001 Removal of the Filler Panel(s) of the Passenger Service/Information Unit(s)
 (PSIU)
 1.
 Reason for the Job

__________________
 Self Explanatory

 2.
 Job Set-up Information

______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
21-24-19-000-001 Removal of the Individual Air Outlet 4150 HM 23-73-51-000-001 Removal of the Loudspeaker 23-73-63-000-001 Removal of the No Smoking/Fasten Seat Belt (NS/FSB)
 Signs in the PSIU and the C/B panels 2000VU and
 2001VU. 23-73-64-000-001 Removal of the Reading Light 24-42-00-861-001 Energize the Ground Service Network from the External
 Power
 35-21-41-000-001 Removal of the Emergency Oxygen Containers
　
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