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EFFECTIVITY 33-21-00 Page 1
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 33 LIGHTS
UF94200
EFFECTIVITY Page 51
ALL
CABIN LIGHTS - SYSTEM DESCRIPTION
GENERAL
The cabin lights are controlled through the CIDS which
includes a Forward Attendant Panel, two directors (one
active and one in standby) and DEUs. Some DEUs are used
for the light system, they are called type "A" DEUs.
The Forward Attendant Panel controls the cabin lights.
Signals from the Forward Attendant Panel are processed
by the directors. The directors transmit these signals
to each Decoder Encoder Unit.
FWD ATTND PNL = Forward Attendant Panel
CIDS = Cabin Intercommunication Data System
DEU = Decoder/Encoder Unit
CABIN GENERAL LIGHTS
The related Decoder/Encoder units control the cabin
fluorescent lamps according to the selection on the
Forward Attendant Panel.
The FWD ATTND PNL controls the DEUs to give: full
intensity, 50% intensity or 10% intensity for their
corresponding window and/or ceiling lights.
ENTRY LIGHTS
The related Decoder/Encoder units control the entry
fluorescent lamps according to the Forward Attendant
Panel selection.
The FWD ATTND PNL controls, via the CIDS directors,
the DEUs in order to give full, 50% or 10% intensity.
NOTE: If the engines are running and the cockpit door is
open, the CIDS directors signal the DEU of the left
forward entry light to set the intensity to 10%.
PASSENGER READING LIGHTS
The Forward Attendant Panel controls the activation
of the passenger reading lights.
The related DEU provides DC control power for individual
switching.
The passenger reading lights can be tested, via the
DEUs, using the Programming and Test Panel.
ATTENDANT WORK LIGHTS
The Forward Attendant Panel controls the activation
of the attendant work lights.
Each power unit is connected to a DEU of the CIDS
directors for light test activation.
The reading lights can be tested, via the DEUs, using
the Programming and Test Panel.
TMULIG401-T01 LEVEL 3
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TMULIG401-P01 LEVEL 3
CABIN LIGHTS - SYSTEM DESCRIPTION
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TMULIG401 LEVEL 3
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33 - LIGHTS
33-25-00 CABIN LIGHTS - READING/WORK
LIGHT TEST USING PTP
CONTENTS:
Reading/Work Light Test Using PTP
TMULIGX01 LEVEL 3
EFFECTIVITY 33-25-00 Page 1
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 33 LIGHTS
UF94200
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ALL
CABIN LIGHTS - READING/WORK LIGHT TEST USING PTP
The test of the reading lights includes the test of
the Attendant work lights, the decoration lights
(option) and the related reading light power unit (each
power unit can drive three separate lights).
Before activation of the test, the pushbuttons POWER
ATTN and POWER READ on the FWD ATTND PNL have to be
pressed to energize the reading/work light system. If
not, a SWITCH ON POWER message will be displayed on
the PTP.
The test also detects any bulb failures by checking
changes in the current and signaling the failure before
the bulb actually burns out.
TMULIGX01-T01 LEVEL 3
EFFECTIVITY 33-25-00 Page 2
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 33 LIGHTS
UF94200
EFFECTIVITY Page 56
ALL
TMULIGX01-P01 LEVEL 3
CABIN LIGHTS READING/WORK LIGHT TEST USING PTP
EFFECTIVITY 33-25-00 Page 3
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 33 LIGHTS
UF94200
EFFECTIVITY Page 57
ALL
CABIN LIGHTS - READING/WORK LIGHT TEST USING PTP
In case of failure, the respective result will appear
on the PTP display and will be written into the Director
class 3 Fault-memory.
After the test, the Reading/work light system is still
energized to give the maintenance crew the possibility
for visual check of the lamps.
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