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switch:
* OFF
* NIGHT
* DIM
* MED
* BRIGHT.
GUN 021-099, 111-114, 117
A five-position rotary selector on the forward and aft attendant
panel controls the ceiling lights. These are the five positions on
the switches:
* OFF
* NIGHT
* DIM
* MED
* BRIGHT.
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Functional Description
When you move the attendant selector to the DIM, MED, or BRT
position, this occurs:
* Ceiling light relay R120 energizes
* 115v ac goes to the ceiling light ballast assemblies
* An electrical ground discrete goes to the ceiling light ballast
assemblies.
The logic circuits in the ceiling light ballast assemblies use
these input signals to set the light level.
When you move the attendant switch to the night position, 28v
ac powers incandescent night lamps.
LIGHTS - CEILING LIGHTS - FUNCTIONAL DESCRIPTION
EFFECTIVITY
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LIGHTS - CEILING LIGHTS - FUNCTIONAL DESCRIPTION
LIGHTS - CEILING LIGHTS - FUNCTIONAL DESCRIPTION
EFFECTIVITY
GUN 001-020, 101-110, 115, 116, 118, 201-999 33-22-00
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LIGHTS - CEILING LIGHTS - FUNCTIONAL DESCRIPTION
LIGHTS - CEILING LIGHTS - FUNCTIONAL DESCRIPTION
EFFECTIVITY
GUN 021-099, 111-114, 117 33-22-00
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LIGHTS - CEILING LIGHTS - FUNCTIONAL DESCRIPTION
33-23-00
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
Purpose
The reading lights supply lighting locally for each passenger
seat.
Physical Description
A reading light has these parts:
* Bezel/lens retainer
* Lens
* Lamp
* Lock/unlock lever.
Location
The reading lights are in the passenger service units (PSUs).
Operation
To operate the reading light, use the switch on the passenger
service unit (PSU). Then use the bezel to adjust the direction of
the light beam. You use the lever to lock or unlock the light in
position. To lock or unlock the reading light do these steps:
* Put the lamp in the correct position
* Lower the PSU
* Move the lever to the lock or unlock position as necessary.
LIGHTS - READING LIGHTS - INTRODUCTION
EFFECTIVITY
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LIGHTS - READING LIGHTS - INTRODUCTION
LIGHTS - READING LIGHTS - INTRODUCTION
EFFECTIVITY
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33-23-00-001
Functional Description
Momentarily push the reading light switch on the PSU to
connect 28v ac to the reading light. The lights are in a parallel
circuit. The loss of one lamp will not affect the other lamps.
Training Information Point
It is not necessary to lower the PSU to replace a lamp.
CAUTION: THE LAMPS ARE HALOGEN. USE COTTON
GLOVES OR LINT FREE CLOTH DURING
REPLACEMENT OPERATIONS. TOUCHING THE
LAMPS WITH BARE FINGERS WILL REDUCE THE
LIFE OF THE BULB.
LIGHTS - READING LIGHTS - FUNCTIONAL DESCRIPTION
EFFECTIVITY
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LIGHTS - READING LIGHTS - FUNCTIONAL DESCRIPTION
EFFECTIVITY
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