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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 4.  Window Reveal (Sidewall) Lights
_______________________________
 A.  The window reveal lights are also referred to as the sidewall lights.
 B.  These lights give general lighting to the passenger compartment from each side.
 C.  AIRPLANES WITH LIGHTS IN THE SIDEWALL; Each light is behind the sculptured panel immediately above a window.
 D.  AIRPLANES WITH LIGHTS ABOVE THE SIDEWALL; Each light is in the air conditioning extrusion outboard of the passenger service unit (PSU).
 E.  The 115 volts ac of electrical power for the sidewall lights comes from the P18 panel.
 F.  Ballasts supply the electrical power to the lamps in the sidewall lights.
 (1)  Some sidewall lights do not have a ballast. Each of these lights operate from the ballast in an adjacent window reveal light.
 G. You control the sidewall lights with a switch on the attendant's panel.
 (1)  
AIRPLANES WITH LIGHTS IN THE SIDEWALL; When you set the switch to the dim position, a transformer increases the 115 volts ac to 280 volts ac. This electrical power is supplied to the ballasts to make the sidewall lights come on dimly. When you set the switch to the bright position, 115 volts ac more electrical power is supplied to the ballasts. This makes the sidewall lights come on brightly.

 (2)  
AIRPLANES WITH LIGHTS ABOVE THE SIDEWALL; When you set the switch to the dim position, each ballast supplies some of the current from the 115 volts ac electrical power source. This makes the sidewall lights come on dimly. When you set the switch to the bright position, all of the current from the 115 volts ac electrical power source is supplied. This makes the sidewall lights come on brightly.

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 33-21-03
 ALL  ú ú 01 Page 2 ú Jul 15/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 PASSENGER COMPARTMENT LIGHTS - MAINTENANCE PRACTICES
____________________________________________________
 TASK 33-21-03-992-032
 1.  Passenger Compartment Lights____________________________
 A. General
 (1)  For the maintenance of the passenger compartment lights, refer to these sources:
 (a)  
AMM 33-21-12/201

 (b)  
AMM 33-21-22/201

 (c)  
AMM 33-21-03/501

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 33-21-03
 ALL  ú ú 01 Page 201 ú Mar 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 PASSENGER COMPARTMENT LIGHTS - ADJUSTMENT/TEST
______________________________________________
 1.  General_______
 A.  This procedure contains an operational test of these passenger
 compartment lights:

 (1)  
Ceiling Lights

 (2)  
Night Lights

 (3)  
Window Reveal Lights

 TASK 33-21-03-715-033
 2.  Passenger Compartment Lights - Operational Test_______________________________________________
 A.  References
 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
SSM 33-22-00

 (3)  
WDM 33-22-11 thru 33-22-99

 B.  Access
 (1)  Location Zone
 100 Upper Half of Fuselage

 C.  Procedure
 S 715-034
 (1)  Do a test of the ceiling lights and night lights.
 (a)  
Supply electrical power (AMM 24-22-00/201).

 (b)  
At the forward attendant's panel, P13, set the GROUND SERVICE switch to the on position.

 (c)  
At the attendant's panel, set the switch for the ceiling lights to the night position. 1) Make sure all the night lights come on correctly. 2) Make sure all the ceiling lights are off.

 (d)  
Set the switch to the dim position. 1) Make sure all the ceiling lights come on dimly. 2) Make sure the night lights go off.
　
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