Optoma Ep770 Projector User Manual

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Image-I
User Controls
  White Peaking
Use the white peaking control to set the white peaking level of 
DMD chip. 0 stands for minimal peaking, and 10 stands for maxi-
mum peaking.  If you prefer a stronger image, adjust towards the 
maximum setting.  For a smooth and more natural image, adjust 
towards the minimum setting.
  Color Temp.
Adjust the color temperature. At higher temperature, the screen 
looks colder; at lower temperature, the screen looks warmer. 
Computer / Video Mode 

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Image-II
(Computer Mode)
User Controls
  Frequency
“Frequency” changes the display data frequency to match the fre-
quency of your computer’s graphic card. If you experience a vertical 
flickering bar, use this function to make an adjustment.
 Tracking
“Tracking” synchronizes the signal timing of the display with the 
graphic card. If you experience an unstable or flickering image, use 
this function to correct it.
  H.Position (Horizontal Position)
 Press the  to move the image left.
...

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Image-II
(Computer Mode)
  Window: When a 4:3 image is bigger than a 16:9 screen, se-
lect the “Window” mode to fit the image onto the screen without 
changing the projection distance.
  16:9 Image Position
Adjust the image position to up or down, when you select the 
aspect ratio to 16:9.
 Press the  to move the image down.
 Press the  to move the image up.
WindowOriginal Pixel
Video Mode 

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 “Saturation”, “Tint” and “Sharpness” function is not sup-ported under DVI-D mode.
User Controls
Image-II
(Video Mode)
  Degamma
This allows you to choose a degamma table that has been fine-tuned 
to bring out the best image quality for the input.
 Saturation
Adjusts a video image from black and white to fully saturated color.
 Press the  to decrease the amount of color in the image.
 Press the  to increase the amount of color in the image.
  Tint 
Adjusts the color balance of red and...

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User Controls
Image-II
(Video Mode)
  16:9 Image Position
Adjust the image position to up or down, when you select the 
aspect ratio to 16:9.
 Press the  to move the image down.
 Press the  to move the image up.
WindowOriginal Pixel
Video Mode 

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User Controls
Audio
 Volume
 Press the  to decrease the volume.
 Press the  to increase the volume.
 Mute
 Choose the left icon to turn mute on.
 Choose the right icon to turn mute off.
Computer / Video Mode 

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  Menu Location
Choose the Menu location on the display screen.
  Projection
    Front-Desktop 
  The factory default setting. 
    Rear-Desktop 
  When you select this function, the projector reverses the image 
so you can project behind a translucent screen.
    Front-Ceiling 
  When you select this function, the projector turns the image 
upside down for ceiling-mounted projection.
    Rear-Ceiling 
  When you select this function, the projector reverses and turns 
the image upside...

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Management
  High Altitude
Choose “ON” to turn on High Altitude mode. Operates the fans at 
full speed continuously to allow for proper high altitude cooling of 
the projector.
  Reset
Choose “Yes” to return the display parameters on all menus to the 
factory default settings.
 Zoom
 Press the  to reduce the size of an image.
 Press the  to magnify an image on the projection screen.
User Controls
Computer / Video Mode 

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  Lamp Hour
Displays the lamp’s elapsed operating time (in hours).
  Lamp Reset
Turns the lamp hour counter to 0 hours.
  Lamp Reminder
Choose this function to show or to hide the warning message when 
the changing lamp message is displayed.  The message will show 
up 30 hours before end of life.
  STD Mode
Choose “On” to dim the projector lamp which will lower power 
consumption and extend the lamp life by up to 130%. Choose ”Off” 
to return BRIGHT mode.
  Auto Power Off (min)
Sets the...

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Appendices
Problem: No image appears on screen.
 Ensure all the cables and power connections are correctly and 
securely connected as described in the “Installation” section.
 Ensure the pins of connectors are not crooked or broken.
 Check if the projection lamp has been securely installed. Please 
refer to the “Replacing the lamp” section.
 Make sure you have removed the lens cap and the projector is 
switched on.
 Ensure that the “Hide” feature is not enabled.
Problem: Partial,...