Acer Projector K138ST User Manual

							11
EnglishTurning the projector off
1 To turn the projector off, press the power button. This message appears: 
Please press the power button again to complete the shutdown process. 
Press the power button again.
2 The LED power indicator will stop blinking and turn solid red to indicate 
standby mode after the projector is turned off.
3 It is now safe to unplug the power cord.
Warning indicators:
• Projector Overheated. Will automatically turn off soon.
This onscreen message indicates that the projector has overheated. 
The projector will automatically shut down. Contact your local dealer 
or service center.
• Fan failed. Will automatically turn off soon.
This onscreen message indicates that the fan has failed. The projector 
will automatically shut down. Contact your local dealer or service 
center.
Note: Whenever the projector automatically shuts down, contact 
your local reseller or service center. 
						

							12
English
Adjusting the Projected Image
Adjusting the Height of Projected Image
The projector is equipped with tilt adjusting wheel for adjusting the height of 
image.
To raise/lower the image:
•Use Tilt adjusting wheel to fine-tune the display angle.
Tilt adjusting wheel 
						

							13
EnglishHow to optimize image size and distance
Consult the table below to find the optimal image sizes achievable when the 
projector is positioned at a desired distance from the screen. Example: If the 
projector is 1.50 m from the screen, good image quality is possible for image 
sizes 87.1.
Note: Remind as below figure, the space of 117 cm height is 
required when located at 1.50 m distance.
Desired 
Distance (m)
Screen size
Top
(Min zoom)
Diagonal (inch)
W (cm) x H (cm) From base to top of 
image (cm)

0.86 49.9 108 x 67 67
1.00 58.0 125 x 78 78
1.14 66.2 143 x 89 89
1.28 74.3 160 x 100 100
1.42 82.4 178 x 111 111
1.5087.1188 x 117117
1.72 99.8 215 x 134 134
Zoom Ratio: 1.0x
87.187.17.1
AC
Height: 
117 cm
1.50 m 
Desired Distance
Scr
e
en
 si
ze 
						

							14
English
User Controls
Installation menu
The installation menu provides an onscreen display (OSD) for projector 
installation and maintenance. Use the OSD only when the message No signal 
input is displayed on the screen. 
The menu options include settings and adjustments for screen size and distance, 
focus, keystone correction and more .
1 Turn on the projector by pressing Power button on the control pad.
2 Press the MENU button on the control pad to launch the OSD for 
projector installation and maintenance.
 
3 The background pattern acts as a guide to adjusting the calibration and 
alignment settings, such as screen size and distance, focus and more.
Note: The OSD screenshot is for reference only and may differ from the 
actual design.
4 The Installation menu includes the following options.
Use the up and down arrow keys to select an option, the left and right 
arrow keys to adjust selected option settings, and the right arrow key to 
enter a submenu for feature setting. The new settings will be saved 
automatically upon exiting the menu.
5 Press the MENU anytime to exit the menu and return to the Acer 
welcome screen.
 
 
  
						

							15
EnglishOnscreen Display (OSD) Menus
The projector has multilingual OSD that allow you to make image adjustments 
and change a variety of settings.
Using the OSD menus
•To open the OSD menu, press MENU on the remote control.
•When the OSD is displayed, use the   keys to select any item in the 
main menu. After selecting the desired main menu item, press   to enter 
submenu for feature setting.
•Use the   keys to select the desired item and adjust the settings by 
using the   keys.
•Select the next item to be adjusted in the submenu and adjust as described 
above.
•Press MENU on the remote control, the screen will return to the main 
menu.
•To exit OSD, press MENU on the remote control again. The OSD menu 
will close and the projector will automatically save the new settings.
Note: Some of the following OSD settings may not be available. Please refer 
to the actual OSD of your projector.
Setting Main menu
Sub menu 
						

							16
English
Color
LumiSense+The light sensor of LumiSense+ technology can intelligently 
optimizes the brightness and color saturation of projected image 
based on actual ambient light. The feature greatly enhances dark 
detail visibility and color saturation.
•Off: For normal mode. (ambient light sensor is off)
•Auto Bright: Light sensor is on to automatically detect 
ambient light and optimize the brightness and color 
saturation of projected image.
•Dynamic Black:automatically optimize the display of dark 
movie scenes enabling them to be shown in incredible detail.
 Dynamic Black shows up while in Movie mode.
Display ModeThere are many factory presets optimized for various types of 
images.
•Bright: For brightness optimization.
•Standard: For common environment.
•Movie: For brighter and general movie/video/photo playing.
•Picture: For graphic picture.
•Game: For game content.
•User: Memorize user’s settings.
Wall colorUse this function to choose a proper color according to the wall. 
There are several choices, including white, light yellow, light blue, 
pink, dark green. It will compensate the color deviation due to the 
wall color to show the correct image tone.
BrightnessAdjust the brightness of the image.
•Press   to darken image.
•Press   to lighten the image.
ContrastContrast controls the difference between the lightest and 
darkest parts of the picture. Adjusting the contrast changes the 
amount of black and white in the image.
•Press   to decrease the contrast.
•Press   to increase the contrast.
SaturationAdjust a video image from black and white to fully saturated color.
•Press   to decrease the amount of color in the image.
•Press   to increase the amount of color in the image.
TintAdjust the color balance of red and green.
•Press   to increase the amount of green in the image.
•Press   to increase the amount of red in the image. 
						

							17
English
Note: Saturation and Tint functions are not supported under computer 
mode or HDMI mode.
Image
Advanced Color TemperatureUse this function to choose CT1, CT2, CT3.
DegammaEffects the representation of dark scenery. With greater gamma 
value, dark scenery will look brighter.
Projection Mode
• Front: The factory default setting.
• Rear: Reverses the image so you can project from behind a 
translucent screen.
Projection Location
• Auto: Automatically adjusts projection location of image.
• Desktop
• Ceiling: Turns the image upside down for ceiling-mounted 
projection.
Aspect RatioUse this function to choose your desired aspect ratio.•Auto: Keep the image with original width-higth ratio and maxi 
mize the image to fit native horizontal or vertical pixels.
•4:3: The image will be scaled to fit the screen and displayed using 
a 4:3 ratio.
•16:9: The image will be scaled to fit the width of the screen and 
the height adjusted to display the image using a 16:9 ratio.
•Full: Resize image to fit full screen by width (1280 pixels) and 
height (800 pixels).
•L.Box: Keep original signal aspect ratio and zoom in by 1.333 
times.
Auto Keystone Automatically adjusts vertical image.
Manual Keystone Adjust image distortion caused by tilting projection. (±20 degrees)
 The Manual Keystone function is unavailable under Auto 
Keystone setting to On.
Sharpness Adjust the sharpness of the image.
•Press   to decrease the sharpness.
•Press   to increase the sharpness. 
						

							18
English
Note: H. Position, V. Position, Frequency and Tracking functions 
are not supported under HDMI, DVI or Video mode.
Note: Sharpness functions is not supported under HDMI (RGB) or 
Computer mode.
Note: HDMI Color Range and HDMI Scan Info functions are only 
supported under HDMI mode.
Setting
H. Position•Press   to move the image left.
•Press   to move the image right.
V. Position
•Press   to move the image down.
•Press   to move the image up.
Frequency Frequency changes the projectors refresh rate to match the 
frequency of your computer’s graphics card. If you can see a vertical 
flickering bar in the projected image, use this function to make the 
necessary adjustments.
Tracking Synchronizes the signal timing of the projector with the graphics card. 
If you experience an unstable or flickering image, use this function to 
correct it.
HDMI Color Range Adjust the color range of the HDMI image data to correct color display 
error.
•Auto: Automatically adjust by information from player.
•Limited Range: Prosess the input image as limited color range data.
•Full Range: Prosess the input image as full color range data.
HDMI Scan Info Adjust the overscan ratio of the HDMI image on screen.
•Auto: Automatically adjust by information from player.
•Underscan: Always no overscan on HDMI image.
•Overscan: Always keep overscan on HDMI image.
DC 5V Out (Standby) Default is Off. Choose On to enable DC 5V OUT connection.
Reset
Press the   button and choose Yes to return the parameters 
on all menus to the factory default settings. 
						

							19
EnglishManagement
Audio
ECO Mode Choose On to dim the projector LED brightness which will lower 
power consumption, extend the LED life and reduce noise. Choose 
Off to return normal mode.
High Altitude Choose On to turn on High Altitude mode. Operate the fans at 
full speed continuously to allow for proper high altitude cooling of 
the projector.
Turn Off Mode
•Instant Off: Shuts down the projector without fan cooling.
•Instant Resume: Resumes the system when the Power button 
is pressed again within 2 minutes.
Auto Shutdown The projector will automatically shutdown when there is no signal 
input after the allocated time. (default is 120 minutes)
AC Power On Choose On to power on projector while AC power plug in.
LED Calibration
Press   after choosing Yes, please wait for 10 seconds to finish 
the white color fine tune process. It helps to adjust LED color 
performance.
Volume
•Press   to decrease the volume.
•Press   to increase the volume.
Volume Boost Choose On to increase volume for low volume content.
BT Speaker Adjust Bluetooth Headset Speaker. Show Connected or Not-
Connected and Press  , to enter pop-up menu.
•Bluetooth: Turn on/off the Bluetooth.
•Device Search: This function to list BT speakers (which is in 
paring mode and with A2DP service) and connect manually 
by user.
 Internal speaker off while BT speaker connection is 
connected successfully.
DTS Sound
DTS Sound
™ is a sound enrichment suite that includes several 
post processing techniques to expand the sound image, enhance 
bass, improve definition and add natural surround effects.
•Choose On to enable DTS Sound.
•Choose Off to disable DTS Sound.
 For DTS patents, see http://patents.dts.com. 
Manufactured under license from DTS Licensing Limited. DTS, the 
Symbol, & DTS and the Symbol together are registered 
trademarks, and DTS Sound is a trademark of DTS, Inc. © DTS, Inc. 
All Rights Reserved.
Treble Adjust tones of high frequency.
Bass Adjust tones of low frequency.
Mute
•Choose On to mute the volume. •Choose Off to restore the volume. 
Alarm Volume Select this function to adjust the volume of any warning 
notifications. 
						

							20
English
3D
Note: It needs correct settings on graphic card 3D application program for 
correct 3D display.
Note: The SW players, such as Stereoscopic Player and DDD TriDef Media 
Player can support 3D format files. You can download these three players 
on web page below,
- Stereoscopic Player (Trial): http://www.3dtv.at/Downloads/Index_en.aspx
- DDD TriDef Media Player (Trial): 
http://www.tridef.com/download/TriDef-3-D-Experience-4.0.2.html
Note: 3D L/R Invert is only available when 3D is enabled.
Note: There has reminder screen if 3D still enable when power on projector. 
Please adjust setting depended on your purpose.
Language
3D Choose On to enable DLP 3D function.
•On: Choose this item while using DLP 3D glasses, quad 
buffer (NVIDIA/ATI...) graphic card and HQFS format file or 
DVD with corresponding SW player.
•Off: Turn off 3D mode.
3D L/R Invert If you see a discrete or overlapping image while wearing DLP 3D 
glasses, you may need to execute Invert to get best match of 
left/right image sequence to get the correct image (for DLP 3D).
3D Warning Message Choose On to display the 3D warning message.
Language
Choose the multilingual OSD menu. Use the   or   key to 
select your preferred menu language.
•Press   to confirm the selection.