The electrical control system of the cargo doors controls the door hydraulic system as follows: The proximity switch 5MJ (12MJ) sends a signal to tell the Landing Gear Control and Interface Unit 5GA2 (LGCIU) if the cargo door is released. If
R 1EFF : 004-049, 051-099, 101-149, 151-199, 1 52-35-00Page 31 1201-299, 301-399, 401-499, 1Aug 01/05 1 1 1CES 1 the manual selector valve 2501MJ (2504MJ) is operated, its internal proximity switch also sends a signal to the LGCIU. The logic of the LGCIU processes these signals and produces an output signal to operate the L/G position relay 12GB. When the aircraft is on the ground, the L/G position relay transmits the LGCIU output signal to the time relay 6MJ and to the relay 15MJ. The time relay 6MJ switches so that the electric pump 3075GX of the yellow hydraulic system operates to pressurize the door hydraulic system . The circuitry of the relays 10MJ, 11MJ, 13MJ and 14MJ transmitts the electrical power from the relay 15MJ to the electro-manual sele ctor valve 2500MJ. Furthermore, this circuitry of the relays controls the logic between the hydraulic operation of the FWD cargo door and the electrical door control system of the AFT cargo door or vice-versa.
When the door control circuit is interrupted, this causes the relay 15MJ to switch and the electro-manual selector valve 2500MJ is de-energized. The electric pump 3075GX remains energized for 10 sec. more due to the time relay 6MJ.
When the door actuators 2502MJ and 2503MJ (2505MJ and 2506MJ) are locked internally, their internal proximity switches send a signal to the green indicator light 9MJ (8MJ) which comes on.
**ON A/C ALL
4. Power Supply____________
**ON A/C 001-003,
The service busbar 601PP supplies the electrical door control system with 28 V DC through the circuit breaker 1MJ. The closed circuit breaker safeties the subsequent components with 5 A:
-
the indicator lights 9MJ and 8MJ,
-
the time relay 6MJ in 103VU,
-
the proximity switches of the door actuators 2502MJ, 2503MJ, 2505MJ and 2506MJ,
-
the proximity switches of the manual selector valves 2501MJ and 2504MJ.
1EFF : ALL 1 52-35-00Page 32 1 1 Aug 01/05R 1 1 1CES 1
**ON A/C 004-049, 051-099, 101-105, 151-199, 201-210,
The service busbar 601PP supplies the electrical door control system with 28 V DC through the circuit breaker 1MJ. The closed circuit breaker safeties the subsequent components with 5 A: - the indicator lights 9MJ and 8MJ, - the time relay 6MJ in 103VU, - the relays 10MJ and 11MJ in 103VU, - the proximity switches of the door actuators 2502MJ, 2503MJ, 2505MJ and 2506MJ, - the proximity switches of the manual selector valves 2501MJ and 2504MJ.
R **ON A/C 106-149, 211-299, 301-399, 401-499,
The service busbar 601PP supplies the electrical door control system with 28 V DC through the circuit breaker 1MJ. The closed circuit breaker safeties the subsequent components with 5 A: - the indicator lights 9MJ and 8MJ, - the time relay 6MJ in 103VU, - the relays 10MJ, 11MJ and 15MJ in 103VU, - the proximity switches of the door actuators 2502MJ, 2503MJ, 2505MJ and 2506MJ, - the proximity switches of the manual selector valves 2501MJ and 2504MJ.
**ON A/C ALL
R 5. Component Description_____________________
R **ON A/C 001-049, 053-099, 101-149, 201-299, 301-399,
(Ref. Fig. 005)
R **ON A/C 051-052,
R (Ref. Fig. 005A)
R **ON A/C 151-199, 401-499,
R (Ref. Fig. 005B)
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Proximity Switch 5MJ (12MJ) R Figure 005
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Proximity Switch 5MJ (12MJ)
R Figure 005A
R 1EFF : 051-052, 1 52-35-00 Page 35
1 1 Aug 01/05
1 1
1CES 1
Proximity Switches 5MJ and 12MJ R Figure 005B 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320飞机维护手册 AMM DOORS 舱门6(85)
