(2)
MAIN OFF - the function is the same as on the FAP.
**ON A/C 051-099,
(3) ENTRY BRT - the function is the same as ENTRY AFT BRT on the FAP.
R (4) ENTRY DIM1 - the function is the same as ENTRY AFT DIM1 on the FAP. (5) ENTRY DIM2 - the function is the same as ENTRY AFT DIM2 on the FAP. **ON A/C 151-199, 211-299,
(3) ENTRY BRT - the function is the same as ENTRY AFT BRT on the FAP. (4) ENTRY DIM1 - the function is the same as ENTRY AFT DIM1 on the FAP. (5) ENTRY DIM2 - the function is the same as ENTRY AFT DIM2 on the FAP. **ON A/C 301-399,
R (3) ENTRY BRT - the function is the same as ENTRY BRT on the FAP. (4) ENTRY DIM1 - the function is the same as ENTRY DIM1 on the FAP. (5) ENTRY DIM2 - the function is the same as ENTRY DIM2 on the FAP.
**ON A/C 151-199,
R (6) CABIN BRT - the function is the same as BRT on the FAP. (7) CABIN DIM1 - the function is the same as DIM1 on the FAP. (8) CABIN DIM2 - the function is the same as DIM2 on the FAP. **ON A/C 211-299,
R R R (6) YC BRT - the function is the same as on the FAP. (7) YC DIM1 - the function is the same as on the FAP. (8) YC DIM2 - the function is the same as on the FAP. **ON A/C 301-399,
(6) AFT BRT - the function is the same as on the FAP. (7) AFT DIM1 - the function is the same as on the FAP.
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(8) AFT DIM2 - the function is the same as on the FAP.
**ON A/C ALL
4. Component Description
_____________________
A. Lamp and Ballast Unit (Ref. Fig. 005) The ballast unit provides power for one fluorescent lamp. Each unit supplies low-voltage power for filament heating and high-voltage power for lamp ignition. The unit contains a transformer, control electronics and two relays. When no input signals are received by the control electronic, the lamp lights with 100 % intensity (BRT). When a 28VDC signal is applied to pin D, the lamp lights with 50 % intensity. With a 28VDC signal at pin E, the lamp lights with 10 % intensity. When 28VDC is at pin F, the internal control relay is energized and the 115VAC for the transformer is disconnected. The fluorescent lamp goes off.
5. Operation/Control and Indication
________________________________
R **ON A/C 001-049, 101-149, 401-499,
The forward attendant panel 120RH is connected to the Directors 101RH and 102RH of the Cabin Intercommunication Data System (CIDS). The input signals from the forward attendant panel 120RH are processed by the director and transmitted to the Decoder/Encoder Units (DEUs). The DEUs accept the input data and activate the output to the fluorescent lamps with ballast units in accordance with the code presented at the input. The DEU is capable of handling up to four fluorescent lamps with ballast units. Three signal lines connect each fluorescsent lamp with ballast unit to the related DEU. The truth table below shows the state of the fluorescent lamps when activated by the DEU output signal. The DEU output signal has two levels 0 (0VDC) and 1 (28VDC). As can be seen in the truth table with no output signal from the associated DEU the fluorescent lamps will illuminate at full brightness.
Truth Table
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Fluorescent Lamp with Ballast Unit - Schematic Figure 005
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| | BALLAST UNIT INPUT PIN. | | LAMP STATE | SIGNAL | | |--------------------------------------------| | | F | D | E | |-----------------------------|---------------|---------------|------------| | BRT | 0 | 0 | 0 | |-----------------------------|---------------|---------------|------------| | DIM 1 (50 %) | 0 | 1 | 0 | |-----------------------------|---------------|---------------|------------| | DIM 2 (10 %) | 0 | 0 | 1 | |-----------------------------|---------------|---------------|------------| | OFF | 1 | 0 | 0 | --------------------------------------------------------------------------
The assignment of the fluorescent lamps with ballast units to cabin zones is programmed into the Cabin Assignment Module (CAM). The CAM is fitted in the programming and test panel 110RH and preprogrammed for particular lighting requirements. Any new requirements can be programmed into the CAM.
**ON A/C 051-099,
The forward attendant panel 120RH and the aft attendant panel 126RH are connected to the Directors 101RH and 102RH of the Cabin Intercommunication Data System (CIDS). The input signals from the forward attendant panel 120RH and the aft attendant panel 126RH are processed by the director and transmitted to the Decoder/Encoder Units (DEUs). The DEUs accept the input data and activate the output to the fluorescent lamps with ballast units in accordance with the code presented at the input. The DEU is capable of handling up to four fluorescent lamps with ballast units. Three signal lines connect each fluorescsent lamp with ballast unit to the related DEU. The truth table below shows the state of the fluorescent lamps when activated by the DEU output signal. The DEU output signal has two levels 0 (0VDC) and 1 (28VDC). As can be seen in the truth table with no output signal from the associated DEU the fluorescent lamps will illuminate at full brightness.
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