W DOC AIRBUS | AMM A320F

PASSENGER READING LIGHTS - DESCRIPTION AND OPERATION


** ON A/C NOT FOR ALL
1. General
Passenger reading lights supply high intensity light to each passenger seat. Each light has an ON/OFF switch.
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
3. System Description
The reading lights are installed in the combi-panels. The combi-panels are installed in the Passenger Service Unit (PSU) channel above the passenger seats. The number of combi-panels on each side of the cabin must agree with the number of seat rows.
Three reading lights are installed in each of the combi-panels 2040/2041VUF and 2040/2041VUG.
Two reading lights are installed in each of the combi-panels 2040VUK and 2041VUK. The middle reading light position of this combi-panels is blanked off.
The reading lights are installed in the Passenger Service Units (PSU's). The PSU's are installed in the PSU channel above the passenger seats. The number of PSU's on each side of the cabin must agree with the number of seat rows.
Three reading lights are installed in each of the PSU's 621RH, 622RH and 623RH.
Three reading lights and an attendant loudspeaker are installed in each of the PSU's 632RH.
The passenger reading lights are installed in the Passenger Service Units (PSUs). The PSUs are installed in the PSU channel above the passenger seats. The number of PSUs on each side of the cabin must agree with the number of seat rows.
Three reading lights are installed in each of the PSUs 621RH.
Two or three reading lights are installed in each of the PSUs 622RH.
One reading light and an attendant loudspeaker are installed in each of the PSUs 622RH.
The reading lights are installed in the combi-panels. The combi-panels are installed in the Passenger Service Unit (PSU) channel above the passenger seats. The number of combi-panels on each side of the cabin must agree with the number of seat rows.
Three reading lights are installed in each of the combi-panels 2040VUF/2041VUF and 2040VUG/2041VUG.
Two reading lights are installed in the combi-panel 2041VUS. The outboard reading light position of this combi-panel is blanked off.
The passenger reading lights are installed in the Passenger Service Units (PSUs). The location of these PSUs is in the PSU channel above the passenger seats. The number of PSUs on each side of the cabin must agree with the number of seat rows. There are:
  • Three reading lights in each of PSUs 652RH and 653RH
  • Two or three reading lights in each of PSU 651RH
  • One reading light and an attendant loudspeaker in each of PSU 652RH
** ON A/C NOT FOR ALL
4. Power Supply
115VAC is supplied to the reading lights from busbars 110XP and 210XP. This is controlled through circuit breakers 1LW thru 6LW and relays 7LW and 8LW.
Power units 511RH thru 514RH change the 115VAC to 6VAC for the light operation. A fuse in each line gives protection for the transformer and the related Printed Circuit Board (PCB). A membrane switch POWER READ on Forward Attendant Panel (FAP) 120RH controls the power supply for the reading lights.
115VAC is supplied to the reading lights from the busbars 110XP and 210XP. This is controlled through the circuit breakers 1LW thru 6LW and the relays 7LW and 8LW.
The power units 511RH and 512RH change the 115VAC to 6VAC for the light operation. A fuse in each line gives protection for the transformer and the related Printed Circuit Board (PCB). A membrane switch POWER READ on the Forward Attendant Panel (FAP) 120RH controls the power supply for the reading lights.
The reading lights are supplied with 115VAC from busbar 110XP through circuit breakers 11LW thru 14LW.
The Passenger Interface and Supply Adapter (PISA) changes 115VAC to 28VDC for the operation of the light. A fuse in each line gives protection for the transformer and the related Printed Circuit Board (PCB). The 'Main ON/OFF' touchbutton on the 'LIGHT' page at Flight Attendant Panel (FAP) 120RH controls the power supply for the reading lights.
115VAC is supplied to the reading lights from busbars 110XP and 210XP. This is controlled through circuit breakers 1LW thru 6LW.
The Passenger Interface and Supply Adapter (PISA) changes 115VAC to 28VDC for the operation of the light. A fuse in each line gives protection for the transformer and the related Printed Circuit Board (PCB). The 'Main ON/OFF' touchbutton on the 'LIGHT' page at Flight Attendant Panel (FAP) 120RH controls the power supply for the reading lights.
115VAC is supplied to the reading lights from busbars 110XP and 210XP. This is controlled through circuit breakers 1LW thru 6LW.
The Passenger Interface and Supply Adapter (PISA) changes 115VAC to 28VDC for the operation of the light. A fuse in each line gives protection for the transformer and the related Printed Circuit Board (PCB). The 'Main ON/OFF' touchbutton on the 'LIGHT' page at Flight Attendant Panel (FAP) 120RH controls the power supply for the reading lights.
** ON A/C NOT FOR ALL
5. Operation
A. Component Description
(1) When the POWER READ membrane switch on the FAP 120RH is pushed, the power units 511RH thru 514RH are activated. The coils of the relays 7LW and 8LW in the panel 2000VU are energized. This closes the contacts of the relays and 115VAC is supplied to the power units.

(2) When the reading-light membrane switches 501RH thru 503RH are pushed, a ground pulse is supplied to the voltage control circuit. This completes the primary circuit of the step-down transformer. The transformer changes the 115VAC down to 6VAC which causes the lights to come on.

(3) A test of the reading lights, the work lights and the PCB circuits is made by the related BITE test on the Programming and Test Panel (PTP) 110RH. In this test all reading lights and work lights come on for approximately 3 s and then go off. After the test the PTP 110RH shows the status of the reading lights, the work lights and the PCBs.
(4) When the POWER READ membrane switch on the FAP 120RH is pushed, the power units 511RH and 512RH are activated. The coils of the relays 7LW and 8LW in the panel 2000VU are energized. This closes the contacts of the relays and 115VAC is supplied to the power units.

(5) When the reading-light membrane switches 501RH thru 503RH are pushed, a ground pulse is supplied to the voltage control circuit. This completes the primary circuit of the step-down transformer. The transformer changes the 115VAC down to 6VAC which causes the lights to come on.

(6) A test of the reading lights, the work lights and the PCB circuits is made by the related BITE test on the Programming and Test Panel (PTP) 110RH. In this test all reading lights and work lights come on for approximately 3 s and then go off. After the test the PTP 110RH shows the status of the reading lights, the work lights and the PCBs.
(7) The cabin reading light-system gives lighting to each passenger seat. The passenger reading light can be controlled with a button on the Passenger Service Unit (PSU) or through the Passenger Service System (PSS)/Cabin Intercommunication Data-System (CIDS) from the Power Control Unit (PCU).
The passenger reading lights are supplied by PISA. These units change the voltage from 115VAC to the necessary reading light supply voltage of 28VDC.
The PISA gives the interface to CIDS for test, control functions and internal tests to find reading light malfunctions (Ref. AMM D/O 23-73-00-00).
(8) The cabin reading light-system gives lighting to each passenger seat. The passenger reading light can be controlled with a button on the Passenger Service Unit (PSU) or through the Passenger Service System (PSS)/Cabin Intercommunication Data-System (CIDS) from the Power Control Unit (PCU).
The PISA supplies the passenger reading lights. These units change the voltage from 115VAC to the necessary reading light supply voltage of 28VDC.
The PISA gives the interface to CIDS for test, control functions and internal tests to find reading light malfunctions (Ref. AMM D/O 23-73-00-00).
[Rev.10 from 2021] 2026.04.01 05:35:30 UTC