(b)
The following warning signals are applied to the Master Warning modules when they occur. 1) Takeoff and landing configuration warning ground signals
from the configuration warning module.
2) An overspeed ground signal from the left or right Air Data Computer.
3) Mode 1 and mode 2 ground signals from the Ground Proximity warning computer.
4) An Autopilot warning No. 2 normal and battery ground signals from the left, center and right Flight Control Computer.
5) Fire warning ground signals from the left and right Engine, Auxiliary Power Unit, Wheel Well and the forward and aft Cargo compartments.
(c)
The warning signals are received by the interface circuits, and are processed when the reset switch is open. In addition, the fire detection warning signals are processed when the Takeoff Inhibit function is not operating. The processed warning signals are applied to the output circuits if not inhibited by the power supply monitor reset signal. This enables the solid state switches to turn on the master WARNING lights.
(d)
When the nose wheel oleo switch is extended during takeoff, the fire detection master warning output circuits are inhibited. It also initiates a 20-second time delay. The Inhibit function expires after 20 seconds, or when the radio altitude attains to more than 400 feet.
(e)
Pressing the master warning light applies a ground signal to the output interface circuits. It disables the solid state switch which extinguishes the Master WARNING lights. The reset signal is removed when the original warning signal is removed.
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757
MAINTENANCE MANUAL
LDG
M W RESET WARN
T/O BELL/CHIMEWARN
R SIREN/OWL
LANDING CONFIGOVERSPEED NO. 2
WARNING
TAKEOFF CONFIGM/W RESET
R ADC/ADIRU
WINDSHEAR
WARNING LATCH OFF L SIREN/OWLWARN
WHEN L SIREN/OWL
RESET
UNTIL OVERSPEED NO. 1M/W RESET
NEXT GNDWARNINGPROX L ADC/ADIRU INPUT R SIREN/OWLWARN
WARNING
GND PROX COMPUTER
A/P
CAUTION DSENGA
L & R(BAT) SIREN/ RESET
OWL A/P M/W RESETMASTER
DSENGA WARNINGDIM & TEST
(NORM)
RR
INHIBIT
BELL/CHIME GND
L/R/C FCC 20 SEC MASTER CAUTION
AIR/GND
WHEEL WELL FIRE DELAY DIM & TEST
AA
AIR OFF L/R EICAS
SYS NO. 2 COMPUTER
DUCT LEAK & W/W AIR GND RELAYOVERHEAT CARD
CAPT MASTER WARN &LATCH OFF
CAUTION LIGHT/SWLEFT ENGINE FIRE
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本文链接地址：757 AMM 飞机维护手册 仪表 CHAPTER 31 - INSTRUMENTS 2(92)
