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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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Operation
You can operate the fluorescent mirror lights in the lavatory in a
dim or a bright mode. When there is 115v ac power applied, the
fluorescent mirror lights have these modes:
* Dim mode when the lavatory door is unlocked
* Bright mode when the lavatory door is locked.
The lavatory light and the incandescent lamp come on when the
28v ac transfer bus 1 has power.
The lavatory occupied light (OCC) light comes on when the
lavatory door is locked and the 28v ac transfer bus 1 has power.
Functional Description
The control signal from the ballast assembly sets the mode of
operation. If the control signal comes back to the ballast
assembly, the light is in the dim mode. The door switch not
locked condition is necessary for dim mode operation
Power for the lavatory light is from the 115v ac ground service
bus.
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
Purpose
The passenger and lavatory call light tells the flight attendant
when a passenger or flight crew member needs aid or
assistance.
Physical Description
The lights are incandescent.
There are lens covers for the lights. The lens covers are blue,
pink, and amber.
Indications
The light under the blue cover comes on when a passenger
pushes the passenger call switch on the PSU. The light under
the amber cover comes on when a passenger pushes the call
switch in a lavatory. The light under the pink cover comes on
when a crew member calls another crew member.
location
The passenger and lavatory call lights are on the ceiling exit
locator signs at the forward and aft ends of the passenger cabin.
Training Information Point
You can put the lens covers in different lamps. Be sure the lens
is the right color for the lamp.
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Passenger Call
When you push the attendant call button on the passenger
service unit (PSU), the control circuit causes these indications:
* Light under the blue lens cover on the forward or aft exit
locator
* High chime sound
* PSU call light.
You must push the call light/reset switch to cause the control
circuit to turn off the indicatins.
A two-position passenger call select switch in the PSU controls
which exit locator sign gets the call from the PSU. You can set
this switch with the PSU open.
Lavatory Call
When you operate the lavatory push-on, push-off light, 28v dc
causes this to occur:
* Relay R1 energizes and latches
* High chime sound
* Lavatory call light/reset switch
* Light under the amber lens cover on the forward or aft exit
locator.
When you push the reset button, you remove 28v dc from relay
R1 and all indications stop.
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LIGHTS - PASSENGER AND LAVATORY CALL LIGHTS - FUNCTIONAL DESCRIPTION
LIGHTS - PASSENGER AND LAVATORY CALL LIGHTS - FUNCTIONAL DESCRIPTION
EFFECTIVITY
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