Optoma Projector Ml550 User Manual

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Music Setup
Select and press  to activate music setup menu. The music setup menu provides the 
following options:
Play Mode  
Press  or  to select the video play mode. Options are: Once, Repeat Once, 
Repeat, and Random.
Show Spectrum  
Select On to show the spectrum plot while music is playing.
Auto Play  
Select On to play the music automatically while entering the music list. 
						

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Information
Display the current projector’s firmware version and date. 
						

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Appendices
Troubleshooting
If you experience problems with your projector, see the following troubl\
eshoot-
ing tips. If the problem persists, contact your local reseller or servic\
e center.
ProblemPossible Solution
No image appears on the 
screen
Ensure that the projector is turned on. y
Ensure that you have chosen the correct input source  y
on the OSD Source menu.
Ensure the external graphics port is enabled. If images  y
are not displayed properly, please upgrade the video 
driver of your computer.
Ensure that all the cables are securely connected. y
Ensure that the pins of the connectors are not bent or  y
broken.
Partial, scrolling or 
incorrectly displayed 
image
Press the  yAuto Adjust button on the control panel.
If you are using a portable computer, set the resolution of  -the computer to WXGA (1280 x 800).
If you experience difficulty in changing resolutions, or  y
if your monitor freezes, restart all the equipment and 
the projector.
If images are not displayed properly, please upgrade  y
the video driver of your computer.
The screen does not dis-
play your presentation
If you are using a portable computer, press  ythe toggle 
output settings. Example: [Fn]+[F4].
Image is unstable or 
flickering
Adjust the tracking in the OSD  yDisplay settings of the 
Advanced menu (in PC Mode only).
Image has vertical flick-
ering bar
Adjust the frequency in the OSD  yDisplay settings of 
the Advanced menu (in PC Mode only).
Image is out of focusAdjust the focus ring on the projector lens.1. 
Ensure that the projection screen is within the required 2. 
distance from the projector (3.18 ft [97 cm] to 8.48 ft 
[258 cm]). 
						

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ProblemPossible Solution
The image is stretched 
when displaying a 16:9 
DVD
The projector automatically detects the input signal  y
format. It will maintain the aspect ratio of the projected 
image according to input signal format with an Original 
setting.
If the image is still stretched, adjust the aspect ratio  y
in the Display settings of the Advanced menu in the 
OSD.
LED warning indicator 
(LED) is solid amber
A projector LED has failed and the projector will auto- y
matically shut down. If the problem persists, contact 
Optoma.
TEMP warning indicator 
(LED) is blinking amber
The projector has overheated. The display automati- y
cally shuts down. Turn the display on again after the 
projector cools down. If the problem persists, contact 
Optoma.
If the projector fan fails, the projector will automatically  y
shut down. Clear the projector mode by pressing and 
holding the Power button for 10 seconds. Please wait 
for about 5 minutes and try to power up again. If the 
problem persists, contact Optoma.
The remote control is 
not operating smoothly 
or works only within a 
limited range
The battery may be low. Check if the LED indication  y
from the remote is too dim. If so, replace with a new 
CR2025 battery. 
						

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Guiding Signals
Projector StatusDescriptionPower
(Blue/Amber)
TEMP Warning
(Amber)
LED Warning
(Amber)
Standby modeProjector in Standby mode. Ready to power on.Amber
Flashing
OFFOFF
Power onProjector in Normal mode, ready to display an image.BLUEOFFOFF
Projector overheatedAir vents might be blocked or ambient temperature may be above 35 ºC. The projector automatically shuts down. Ensure that the air vents are not blocked and that the ambient temperature is within operational range. If the problem persists, contact us.
OFFAmber
Flashing
(cycling turn-off 1sec and turn-on 3sec)
OFF
Fan breakdownOne of the fans has failed. The projector automatically shuts down. If the problem persists, contact us.
OFFAmber
Flashing
(cycling turn-off 0.5sec and turn-on 2sec)
OFF
LED failureLED shutdown.OFFOFFAMBER 
						

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Compatibility Modes (Analog/Digital)
ResolutionRefresh Rate (Hz)Hsync Frequency (KHz)Pixel Clock (MHz)
640 x 35070.08731.46925.175
720 x 40070.08731.46928.322
720 x 40070.08731.46928.322
640 x 48059.94031.46925.175
640 x 48075.00037.50031.500
640 x 48085.00843.26936.000
800 x 60060.31737.87940.000
800 x 60075.00046.87549.500
800 x 60085.06153.67456.250
1024 x 76860.00448.36365.000
1024 x 76875.02960.02378.750
1024 x 76884.99768.67794.500
1280 x 72059.85544.77274.500
1280 x 102460.02063.981108.000
1280 x 102475.02579.976135.000
1280 x 76859.8747.77679.500
1366 x 76859.78947.71285.500
1680 x 105059.95465.290146.250
1440 x 90059.88755.935106.500
1920 x 108060.00067.500148.500
1280 x 80059.81049.70283.500
1280 x 72059.85544.77274.500
720 x 480 p6059.94031.46927.000
720 x 576 p5050.00031.25027.000
1280 x 720 p6060.00045.00074.250
1280 x 720 p5050.00037.50074.250
1920 x 1080 i6060.00033.75074.250
1920 x 1080 i5050.00028.12574.250
1280 x 768 -R6059.99547.39668.250
1280 X 76874.89360.289102.250
1280 X 76884.83768.633117.500
1280 x 800 -R59.91049.30671.000
1280 x 80074.93462.795106.500
1440 x 90074.98470.635136.750 
						

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FOCUS
Tripod Mount the Projector
Screw a standard tripod into the screw hole on the projector.
Unit: mm
(Screw hole for tripod)
NOTE: 
The tripod and ceiling mount are optional accessories.1. 
Please note that damage resulting from incorrect installation will void \
the warranty.2. 
52.0
54.0
Insert Nut 1/4” - 20 UNCxL7.5mm