Dukane Model 28a7100hc Users Guide

30
Picture menuTo adjust the following settings, highlight the setting, press Select, use the 
up and down arrows to adjust the values, then press Select to confirm the 
changes.
Key s t o n e: adjusts the image vertically and makes a squarer image. You can 
also adjust keystone from the keypad.
Contrast: controls the degree of difference between the lightest and darkest 
parts of the picture and changes the amount of black and white in the 
image.
Brightness: changes the intensity of the image.
Color:...

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Presets: Presets are provided that optimize the projector for displaying 
computer presentations, photographs, film images, and video images. Film 
input is material originally captured on a film camera, like a movie; video 
input is material originally captured on a video camera, like a TV show or 
sporting event. You can use the preset as a starting point, then further cus-
tomize the settings for each source. The settings you customize are saved in 
the preset for each source. To restore the...

32 Advanced menu
Sharpness: (video sources only) changes the clarity of the edges of a video 
image. Select a sharpness setting.
Color Temperature: changes the intensity of the colors. Select a listed rela-
tive warmth value. 
Color Control: allows you to individually adjust the gain for the red, green, 
and blue colors.
Video Standard: when it is set to Auto, the projector attempts to automati-
cally pick the video standard based on the input signal it receives. (The 
video standard options may vary...

33
Settings menuAudio: allows adjustments to Volume of the internal speaker. Adjustments 
can also be made from the projector’s keypad and the remote.
Sources: Power-up Source determines which source the projector checks 
first for active video during power-up. When the Autosource feature is On, 
the projector automatically finds the active source, checking the Pow e r- u p  
Source first. The options are Computer 1 for a computer source, and Video 
1 (for S-video connections), and Video 2 (for composite...

34
Startup Logo: allows you to display a blank screen instead of the default 
screen at startup, and when no source is detected. 
Blank Screen: determines what color is displayed when you press the 
Blank button on the remote.
Effect Key: allows you to assign a different function to the Effect button on 
the remote, allowing you to quickly and easily use the effect. Highlight an 
effect and press Select to choose a different one.
Blank: displays an empty screen.
Mute: turns off all sound.
Aspect...

35
Language: allows you to select a language for the onscreen display.
Service: To use these features, highlight them and press Select.
Factory Reset: restores all settings to their default.
Lamp Reset: resets the lamp hours used counter in the About menu to 
zero. Do this only after changing the lamp. 
Service Code: only used by authorized service personnel.
About: provides information about the projector and the active source. 
Showing the About box is the default action assigned to the Effect button....

36
MaintenanceCleaning the Lens1
Apply a non-abrasive camera lens cleaner to a soft, dry cloth.
 Avoid using an excessive amount of cleaner, and don ’t apply the 
cleaner directly to the lens. Abrasive cleaners, solvents or other harsh 
chemicals might scratch the lens.
2
Lightly wipe the cleaning cloth over the lens in a circular motion. If you 
don ’t intend to use the projector immediately, replace the lens cap.
Replacing the Projection LampThe lamp hours used timer in the About menu counts the...

37 4
Loosen the two captive screws that attach the lamp housing to the pro-
jector.
5
Detach the lamp connector from the projector by depressing the locking 
tab on the connector and lightly pulling it free.
WA R N I N G:
To avoid burns, allow the projector to cool for at least 30 minutes 
before you replace the lamp.
Do not drop the lamp housing or touch the glass bulb! The glass 
may shatter and cause injury.
Be extremely careful when removing the lamp housing. In the 
unlikely event that the bulb...

38
Cleaning the Lamp Housing ScreensIn dirty or dusty environments, the two dust filter screens in the lamp hous-
ing can become clogged, causing high temperatures and premature lamp 
failure. Routine maintenance to remove dust from the screens lowers the 
lamp operating temperature and prolongs lamp life. To maximize lamp life 
you should clean the screen every 250 hours. 1
Remove the lamp housing. 
2
Examine the dust filter screens on the lamp housing. If necessary, use a 
vacuum cleaner set on low...

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AppendixSpecificationsTe m p e r a t u r e
Operating 50 to 104
° F (10 to 40
° C) at sea level
50 to 95
° F  (10 to 35
° C) at 10,000 feet
Non-operating -4 to 140
° F (-20 to 60
° C)
Altitude  Operating 0 to 10,000 feet (3,048 meters) 
Non-operating 0 to 20,000 feet (6,096 meters)
Humidity  Operating  10% to 95% relative humidity, non-condensing
Non-operating 10% to 90% relative humidity, non-condensing
Dimensions 12.5 x 9.8 x 4.49
” (318 x 249 x 114 mm)
We i g h t 6.8 lbs. (3.1 kg) unpacked
Optics...