Dim Control Knob
Rotate knob to increase or decrease display intensity.
Copyright . The Boeing Company. See title page for details.
10.17.2  June 1, 2003

Flight Instruments, Displays -Head-Up Display System – Controls
737 Flight Crew Operations Manual

Stow Lever
The combiner unstows and stows by using the stow lever on the combiner arm. Pulling the stow lever toward the pilot and rotating the combiner down and forward to the normal operating detent, activates the HUD. The HUD is deactivated whenever the combiner is not in the normal operating detent.
The combiner also incorporates a breakaway position that allows the combiner glass to be displaced forward from its normal operating detent. The combiner glass can be returned from the breakaway position by pulling the stow lever toward the pilot and rotating the glass aft to the normal operating detent.
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Flight Instruments, Displays -Head-Up Display System – Controls 737 Flight Crew Operations Manual

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Copyright . The Boeing Company. See title page for details.
10.17.4  June 1, 2003

737 Flight Crew Operations Manual

Introduction
The common display system (CDS) supplies information to the flight crew on six flat panel liquid crystal display units (DUs). The outboard and inboard display units present all primary flight and navigation information. Primary engine indications are normally displayed on the upper DU. Secondary engine indications or system data are normally displayed on the lower DU.
Detailed information on the following subjects is found in other sections of this chapter:
.
Primary Flight Display (PFD)– Section 31

.
Navigation display (ND)– Section 41.

Display Brightness Control
Adjustment of the brightness of each DU is controlled by a combination of light sensors and brightness controls. Two remote light sensors, located left and right on the top of the glareshield, compensate for the amount of ambient light entering through the flight deck windows and adjust the brightness of the related DUs. Each DU also has an integral light sensor which provides automatic control of brightness as a function of ambient light striking the face of the DU. Brightness controls are used by the pilot to further adjust the intensity of each display unit.
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The DISPLAYS source panel, located on the forward overhead panel, contains source controls for the display electronic units (DEUs) and EFIS control panels.
Two DEUs receive data from sensors and airplane systems and supply data to the DUs. During normal operation, with the display SOURCE selector switch in the AUTO position, DEU1 supplies data to the Captain outboard, Captain inboard and upper DUs while DEU2 supplies data to the First Officer outboard, First Officer inboard and lower DUs. If a DEU fails, the remaining DEU automatically supplies data to all six displays. A single DEU failure will continue to supply each pilot with flight instrument information from independent sources. Each DEU receives data from both ADIRUs.
The display SOURCE selector, used on the ground for maintenance purposes, allows manual selection of either DEU1 or DEU2 for all six display units. If the displays are automatically or manually switched to a single DEU source, a “DSPLY SOURCE” annunciation illuminates on both pilot’s primary flight display.
The CONTROL PANEL select switch determines which EFIS control panel controls the pilots’ display functions. With the switch positioned to either BOTH ON 1 or BOTH ON 2, the selected EFIS control panel provides inputs for both sets of pilot displays. When in the NORMAL position, a “DISPLAYS CONTROL PANEL” annunciation illuminates below the altitude indication showing a failure of the associated EFIS control panel.
Copyright . The Boeing Company. See title page for details.
10.21.2  March 29, 2004

Flight Instruments, Displays -PFD/ND System Description 737 Flight Crew Operations Manual
EFIS Control Panels
The EFIS control panels, located on the glareshield, controls display options, mode, and range for the related pilot’s displays. Refer to the PFD and ND sections of this chapter for detailed information.
If an EFIS control panel fails, the displays can be controlled by the remaining control panel.
Display Select Panel
The display select panel, located on the left and right forward panels, controls the displays on the inboard, outboard and lower DUs. Normal operation is all selectors in the NORMAL position. The pilots’ outboard and inboard DUs display primary flight and navigation data and the upper DU displays primary engine data and fuel quantity.
　
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