Optoma Projector Ml550 User Manual

20English
Raising the Projector Height
Raise the projector to the desired display angle, and use the front tilt adjustment wheel 
to fine-tune the display angle.
Lowering the Projector Height
Lower the projector, and use the front tilt adjustment wheel to fine-tune the display 
angle.
Front tilt adjustment wheel
(Angle of tilt: 0 to 6 degrees)
Adjusting the Projector Focus
IMPORTANT NOTE: To avoid damaging the projector, ensure that the adjustm\
ent wheels are 
fully retracted before moving the projector...

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Adjusting Projection Image Size
Universal I/O
80” (203.2 cm)
70” (177.8 cm)
60” (152.4 cm)
50” (127.0 cm)
40” (101.6 cm)
30” (76.2 cm)
3.18’ (0.97 m)4.23’ (1.29 m)5.28’ (1.61 m)6.36’ (1.94 m)7.41’ (2.26 m)8.48’ (2.58 m)
Projector to screen distance 

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Screen SizeDistanceDiagonalWidthHeight
30” (76.2 cm)25.59” (65 cm) 15.75” (40 cm)3.18’ (0.97 m)
40” (101.6 cm)33.86” (86 cm)21.26” (54 cm)4.23’ (1.29 m)
50” (127.0 cm)42.13” (107 cm) 26.38” (67 cm)5.28’ (1.61 m)
60” (152.4 cm)50.79” (129 cm) 31.89” (81 cm)6.36’ (1.94 m)
70” (177.8 cm)59.45” (151 cm) 37.01” (94 cm)7.41’ (2.26 m)
80” (203.2 cm)67.72” (172 cm) 42.52” (108 cm)8.48’ (2.58 m)
NOTE: This graph is for user reference only.
FOCUS
60”
Distance: 1.94 m 

23English
Using the On-Screen Display
The projector has a multi-language On-Screen Display (OSD) Menu that can be 1. 
displayed with or without an input source.
Press the 2. Menu button on the control panel or the remote control to enter the Main 
Menu.
To select an option, press the 3.  or  buttons on your projector’s control panel or 
remote control.
Use the 4.  or  buttons on the control panel or remote control to adjust the set-
tings.
To exit the OSD, press the 5. Menu button directly on the control...

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Source
The Source menu allows you to select your projector's input source.
Auto Source  
If you select and press  to activate, the Auto option will automatically find the next 
available input source.
VGA  
Press  to detect a VGA signal.
HDMI  
Press  to detect a HDMI signal. 

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USB  
Allows you to playback the photo, Audio, or Video files from your USB flash disk.
MicroSD  
Allows you to playback the photo, Audio, or Video files from your microSD card.
Internal Memory  
Allows you to playback the photo, Audio, or Video files from internal memory of the 
projector.
Display Mode
The Display Mode menu allows you to optimize the display image. The opti\
ons are: 
Bright, PC, Cinema, and Photo mode.
Audio
The Audio menu allows you adjust the volume setting of your...

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Auto Adjust
Auto Adjust automatically adjusts the projector's Horizontal Position, Vertical Posi-
tion, Frequency, and Tracking in VGA source (PC mode).
OSD Reset
Select and press  to reset all settings to its factory default.
The below warning message appears:
Reset items include both computer sources and Video source settings.
Data Transferring
Select and press  to action.
The below warning message appears:
Advanced
See “Advanced Menu” on pages 27~31.
FW Version
Display the current...

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Advanced Menu
The Advanced menu allows you to change settings for Display, Image, and Power.
Display (In PC Mode)
Select and press  to activate display settings. The display menu provides the follow-
ing options:
Horizontal Position  
Press  to move the image right and  to move the image left.
Vertical Position  
Press  to move the image up and  to move the image down.
Frequency  
Allows you to change the display data clock frequency to match the frequency 
of your computer’s graphics card. If...

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Aspect Ratio  
Allows you to select the aspect ratio to adjust how the image appears. O\
ptions are: 
Origin, 16:9 and 4:3.
Origin: Select  yOrigin to maintain the aspect ratio of the image projector 
according to the input source.
16:9: The input source scales to fit the width of the screen to project a 16:9  y
screen image.
4:3: The input source scales to fit the screen and projects a 4:3 image. y
Zoom  
Press  or  to zoom and view the image.
NOTE: Closed caption option is available for NTSC...

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Image (In PC Mode)
Select and press  to activate image settings. The image menu provides the following 
options:
Brightness  
Press  and  to adjust the brightness of the image.
Contrast  
Press  and  to adjust the display contrast.
White Intensity  
Press  and use  and  to display white intensity.
NOTE: If you adjust the settings for Brightness, Contrast, and White Int\
ensity the projector auto-
matically switches to User mode.
Image (In Video Mode)
Select and press  to activate image...