EICAS DISPLAY
DISPLAY SELECT PANEL (-205 SHOWN)
-206 PANEL; INNER KNOB CONTROLS UPPER DISPLAY BRIGHTNESS
-206 PANEL; OUTER KNOB CONTROLS LOWER DISPLAY BRIGHTNESS
MASTER CAUTION LIGHT CANCEL/RECALL SWITCHES
-206 PANEL; NOT SHOWN
EICAS - Component Detail
Figure 2 (Sheet 1)
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MAINTENANCE MANUAL
MANUAL EVENT
READ SWITCH
DISPLAY SELECT BITE TEST MANUAL EVENT NON-VOLATILE-
SWITCHES SWITCH RECORD SWITCH MEMORY ERASE
SWITCH
EICAS MAINTENANCE PANEL
EICAS - Component Detail
Figure 2 (Sheet 2)
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31-41-00
ALL ú
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ú Dec 20/92
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757
MAINTENANCE MANUAL
B. EICAS Switching Modules
(1)
The two EICAS switching modules interface between the EICAS computers and the EICAS display units. Each EICAS computer provides video signals to both switching modules. Video driving signals for the top display unit come from the upper switching module. Signals for the bottom display unit come from the lower switching module.
(2)
The EICAS switching modules also interface between the EICAS computers and the Flight Data Recording System. The EICAS, which is currently driving the displays, sends high speed digital data to the flight data recorder.
(3)
The EICAS computers and switching modules are located on rack E4-2 in the main equipment center. Their front panels have no controls or indicators.
C. Master Caution Lights
(1) The yellow master CAUTION light/switches are located on both ends of the pilots' glareshield (P7). The lights come on when either EICAS computer generates a caution signal, which is done in conjunction with the display of a level B alert message. Pressing either indicator light cap will turn off both lights.
D. EICAS Display Select Panel
(1)
The display select panel provides control functions to the EICAS computers for system operation. These functions include display format selection, computer source selection, display brightness/balance control, and thrust reference setting control. Controls for clearing displayed engine exceedance data and for recording system parameters are also provided. The panel is located on the forward electronics panel (P9).
(2)
The two DISPLAY switches are momentary pushbutton switches. They control the mode of the EICAS computers as follows:
(a)
Pressing the ENGINE switch will display all secondary engine parameters. This data will be displayed in full secondary format on the bottom display unit under normal conditions. Pressing ENGINE a second time will clear secondary parameters from the display.
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