Optoma Projector Ep1690 User Manual

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User Controls

Image
 Mode
There are many factory presets optimized for various types of im-
ages.
Cinema: For home theater.
Bright
TV
sRGB: For Standard PC color (best color reproduction).
User: Memorize user’s settings.
 Contrast
The contrast controls the degree of difference between the lightest 
and darkest parts of the picture. Adjusting the contrast changes 
the amount of black and white in the image.
Press the  to decrease the contrast.
Press the  to increase the contrast....

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User Controls

 Tint 
Adjusts the color balance of red and green.
Press the  to increase the amount of green in the image.
Press the  to increase the amount of red in the image.
 Sharpness
Adjusts the sharpness of the image.
Press the  to decrease the sharpness.
Press the  to increase the sharpness.
Image
“Tint” function is only supported under 
Video mode.   

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User Controls

Image / Advanced
 Degamma
This allows you to choose a degamma table that has been fine-
tuned to bring out the best image quality for the input.
Film: For home theater.
Video: For video or TV source.
Graphics: For image source.
PC: For PC or computer source.
 Brilliant Color
This adjustable item utilizes a new color-processing algorithm and 
system level enhancements to enable higher brightness while pro-
viding true, more vibrant colors in picture. The range is from “ 0 ”...

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User Controls

 RGB/Gain/Bias
Press  or  into the next menu as below and then use  or  to 
select item. Use  or  to select Red, Green, or Blue for brightness 
(Gain) and contrast (Bias). 
 Input Source
Enable or disable input sources. Press  or  into the next menu 
as below and then use  or  to select. Press “Select (Enter)” to 
finalize the selection. The projector will not search inputs that are 
de-selected.
 Color Space
Select an appropriate color matrix type from RGB or YPbPr.
Image /...

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User Controls

 Format
Use this function to choose your desired aspect ratio.
4:3: This format is for 4x3 input sources not enhanced for Wide-
screen Display.
16:9: This format is for 16x9 input sources, like HDTV and DVD  
enhanced for Widescreen Display.
LBX: This format is for non-16x9, letterbox source and for users 
who use external 16x9 lens to display 2.35:1 aspect ratio 
using full resolution.
Native: This format displays the original image without any 
scaling.
Display
Input...

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User Controls

Detail informations about LBX mode :1.   Some Letter-Box DVD contents are not enhanced for 16x9 TV, 
then image will not look right in 16:9 display. 
One can use 4:3 mode to view the correct info. 
But if the content itself is not 4:3, it will have black bars 
around the image in a 16:9 display. For this kind of content, 
you can use LBX mode to fill the image in the 16x9 display as 
much as possible. 
2.   If you use an external 16x9 lens, this LBX mode also allows 
you to...

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User Controls

 H Image Shift
Shifts the projected image position horizontally. 
 V Image Shift
Shifts the projected image position vertically. 
 H Keystone
Press the  or  to adjust image distortion horizontally and makes 
a squarer image.
 V Keystone
Press the  or  to adjust image distortion vertically and makes a 
squarer image.
 PC Mode
This Mode is only for use when using the EP1690 with a PC signal, 
either Analogue or VGA1 via the VGA2 connector.
Wide: If your PC output is a wide...

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User Controls

 Language
Choose the multilingual OSD menu. Press  or   into the sub menu 
and then use the   or  key to select your preferred language. Press 
“Select (Enter)” to finalize the selection.
 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...

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User Controls

 Signal
Phase: Synchronizes the signal timing of the display with the 
graphics card. If you experience an unstable or flicker-
ing image, use this function to correct it.
Frequency : Changes the display data frequency to match the 
frequency of your computer’s graphic card. When 
you experience a vertical flickering bar, use this 
function to make an adjustment.
H. Position: Adjusts the horizontal position.
V. Position: Adjusts the vertical position.
 Mute
Choose the...

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User Controls

 Menu Location
Choose the menu location on the display screen.
 Source Lock
When this function is turned off, the projector will search for 
other signals if the current input signal is lost. When source lock 
is turned on, it will “Lock” the current source channel before you 
press “Source Lock” button on remote control for next channel.
 High Altitude
Choose “On” to turn on High Altitude mode. Operates the fans at 
full speed continuously to allow for proper high altitude...