Acer Projector K138ST User Manual

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EnglishAppendices
Troubleshooting
If you experience a problem with your Acer projector, refer to the following 
troubleshooting guide. If the problem persists, please contact your local reseller 
or service center.
Image Problems and Solutions
# Problem Solution
1 No image appears 
onscreen•Connected as described in the Getting Started 
section.
•Ensure none of the connector pins are bent or 
broken.
•Make sure the projector is switched on.
2 Partial, scrolling 
or incorrectly 
displayed image 
(For PC (Windows 
95/98/2000/XP/
Vista/Win7/Win 
8))
•For an incorrectly displayed image:•Open My Computer, open the Control 
Panel, and then double-click the Display 
icon.
•Select the Settings tab.•Verify that your display resolution setting is 
lower than or equal to 1080P-EIA.
•Click the Advanced Properties button.
If the problem still appears, change the monitor display 
you are using and follow the steps below:
•Verify that the resolution setting is lower than 
or equal to 1080P-EIA.
•Click the Change button under the 
Monitor tab.
•Click Show all devices. Next, select Standard 
monitor types under the SP box, and choose 
the resolution mode you need under the 
Models box.
•Verify that the resolution setting of the 
monitor display is lower than or equal to 
1080P-EIA. 
						

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English
3 Partial, scrolling 
or incorrectly 
displayed image 
(for notebooks)•For an incorrectly displayed image:•Follow the steps for item 2 (above) to adjust 
the resolution of your computer.
•Press the toggle output settings. Example: 
[Fn]+[F4], Compaq [Fn]+[F4], Dell [Fn]+[F8], 
Gateway [Fn]+[F4], IBM [Fn]+[F7], HP [Fn]+[F4], 
NEC [Fn]+[F3], Toshiba [Fn]+[F5]
•If you experience difficulty changing resolutions or 
your monitor freezes, restart all equipment 
including the projector.
4 The screen of the 
notebook 
computer is not 
displaying your 
presentation
•If you are using a Microsoft® Windows® based 
notebook: Some notebook PCs may deactivate their 
own screens when a second display device is in use. 
Each has a different way to be reactivated. Refer to 
your computers manual for detailed information.
•If you are using an Apple® Mac® OS based 
notebook: In System Preferences, open Display and 
select Video Mirroring On.
5 Image is unstable 
or flickering
•Adjust the Tracking to correct it. Refer to the 
Image section for more information.
•Change the display color depth settings on your 
computer.
6 Image has vertical 
flickering bar
•Use Frequency to make an adjustment. Refer to 
the Image section for more information.
•Check and reconfigure the display mode of your 
graphics card to make it compatible with the 
projector.
7 Image is out of 
focus
•Adjust the focus ring on the projector lens.
•Make sure the projection screen is within the 
required distance of 1.8~10.6 feet (0.6~3.2 meters) 
from the projector. Refer to the How to Get a 
Preferred Image Size by Adjusting Distance and 
Zoom section for more information.
8 Image is stretched 
when displaying a 
widescreen 
DVD titleWhen you play a DVD encoded in anamorphic or 16:9 
aspect ratio you may need to adjust the following 
settings:
•If you play a 4:3 format DVD title, please change the 
format to 4:3 in the projector OSD.
•If the image is still stretched, you will also need to 
adjust the aspect ratio. Set up the display format to 
16:9 (wide) aspect ratio on your DVD player.
•If you play an Letterbox(LBX) format DVD title, 
please change the format to Letterbox(LBX) in the 
projector OSD. 
						

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Problems with the Projector
9 Image is too small 
or too large•Adjust the zoom ring on the top of the projector.
•Move the projector closer to or further from the 
screen.
•Press MENU on the remote control or on the 
control panel. Go to Image --> Aspect Ratio and 
try different settings.
10 Image has slanted 
sides
•If possible, reposition the projector so that it is 
centered on the screen.
•Press the Keystone on the OSD until the sides are 
vertical.
11 Image is reversed
•Select Image --> Projection Mode on the OSD and 
adjust the projection direction.
# Condition Solution
1 The projector stops responding 
to all controlsIf possible, turn off the projector, then 
unplug the power cord and wait at least 30 
seconds before reconnecting power. 
						

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English
OSD Messages
# Condition Message Reminder
1 Message Fan Fail - the system fan is not working.
Projector Overheated - the projector has exceeded its 
recommended operating temperature and must be allowed to 
cool down before it may be used. 
						

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EnglishLED & Alarm Definition Listing
LED Messages
Note: When power on, click any key, Menu/Up/Down/Left/Right 
key LED will all be trigger.
MessagePOWER LED LAMP TEMP
Red Blue Red Red
Standy by ON --- --- ---
Power on --- ON --- ---
Over Heat --- ON --- ON
Fan Fail --- ON --- Flash (2s interval)
LED Fail --- ON ON --- 
						

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English
Specifications
The specifications listed below are subject to change without notice. For final 
specs, please refer to Acers published marketing specifications.
* Design and specifications are subject to change without notice.
Projection system
DLP®
Resolution WXGA (1280 x 800)
Computer compatibility IBM PC and compatibles, Apple Macintosh, iMac and 
VESA standards: SXGA, XGA, SVGA, VGA, WXGA
Aspect ratio Full, 4:3, 16:9, L.Box
Displayable colors 16.7 million colors
Projection lens F = 1.9, f = 8.02 mm , 1:1.0 manual zoom and manual 
focus
Projection screen size (diagonal) 50 (127cm) ~ 100 (254cm)
Projection distance 2.8 (0.9m) ~ 5.7 (1.7m)
Throw ratio 0.8 +/- 5%
Horizontal scan rate 30 k - 100 kHz
Vertical refresh scan rate 50 - 120 Hz
Keystone correction +/- 20 degrees
Audio Internal speaker with 3W x 2 output
Bluetooth Headset Audio Completely backward-compatible with BT1.1, 1.2, 2.0, 
2.1 systems
Weight 0.95kg (2.0 lbs)
Dimensions (W x D x H) 240 mm x 147 mm x 59 mm (9.45 x 5.79 x 2.32)
Power supply 100V~240V AC to DC 19V 4.74A Adapter, 50-60 Hz
Power consumption Normal mode: 80 W +/- 10 % @ 110Vac (Bright mode 
@ full power)
ECO mode: 38W +/-10 % @ 110Vac (Movie mode @ 
eco power)
Standby < 0.5 W
Operating temperature 5 ºC to 40 ºC / 41 ºF to 104 ºF
I/O connectors
•DC input x1
•USB x 1
•Audio In x1
•HDMI (MHL) x1
•VGA IN x1
•Audio Out x1
Standard package contents
•Power cord x1
•AC to DC power adapter
•VGA cable x1
•Remote control x1
•Battery x2 (for remote control) (option)
•Users guide (CD-ROM) x1
•Quick start guide x1
•Carrying case x1 
						

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EnglishCompatibility modes
A. VGA Analog 
1 VGA Analog - PC Signal
ModesResolutionV.Frequency [Hz]H.Frequency [KHz]
VGA640x4806031.5
640x4807537.5
SVGA800x6005635.1
800x6006037.9
800x6007546.9
800x60012077.4
XGA1024x7686048.4
1024x7687056.5
1024x7687560.0
1024x76812099.0
SXGA1152x8647567.5
1280x10246064.0
1280x10247580.0
QuadVGA1280x9606060.0
1280x9607575.2
SXGA+1400x10506065.3
PowerBook G4 640x480 60 31.4
PowerBook G4
640x48066.6 (67)34.9
PowerBook G4
800x6006037.9
PowerBook G4 1024x768 60 48.4
PowerBook G4 1152x870 75 68.7
PowerBook G4 1280x960 75 75.0
i Mac DV (G3) 1024x768 75 60.0 
						

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English
2 VGA Analog - Extended Wide timing
3 VGA Analog - Component Signal
B. HDMI Digital 
1 HDMI - PC Signal
ModesResolutionV.Frequency [Hz]H.Frequency [KHz]
WXGA1280x7686047.8
1280x7687560.3
1280x7206044.8
1280x8006049.6
1280x800120101.5
1440x9006059.9
WSXGA+1680x10506065.31920x1080 
(Reduced 
Blanking Timing)
6066.6
1366x7686047.7
ModesResolutionV.Frequency [Hz]H.Frequency [KHz]
480i720x48059.94(29.97)15.7
576i720x57650(25)15.6
480p720x48059.9431.5
576p720x5765031.3
720p1280x7206045.0
720p1280x7205037.5
1080i1920x108060 (30)33.8
1080i1920x108050 (25)28.1
1080p1920x108023.97/2427.0
1080p1920x10806067.5
1080p1920x10805056.3
ModesResolutionV.Frequency [Hz]H.Frequency [KHz]
VGA640x4806031.5
640x4807537.5
SVGA800x6005635.1
800x6006037.9
800x6007546.9
800x60012077.4
XGA1024x7686048.4
1024x7687056.5
1024x7687560.0 
						

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English
2 HDMI - Extended Wide timing
1024x76812099.0
SXGA1152x8647063.8
1152x8647567.5
1280x10246064.0
1280x10247580.0
QuadVGA1280x9606060.0
SXGA+1400x10506065.3
PowerBook G4 640x480 60 31.4
PowerBook G4
640x48066.6 (67)34.9
PowerBook G4
800x6006037.9
PowerBook G4
1024x7686048.4
PowerBook G4
1152x8707568.7
i Mac DV (G3)
1024x7687560.0
ModesResolutionV.Frequency [Hz]H.Frequency [KHz]
WXGA1280x7686047.8
1280x7687560.3
1280x7206044.8
1280x8006049.6
1280x800120101.5
1440x9006059.9
WSXGA+1680x10506065.3
1920x1080 
(Reduced Blanking 
Timing) 
6066.6
1366x7686047.7 
						

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English
3 HDMI - Video Signal
ModesResolutionV.Frequency [Hz]H.Frequency [KHz]
480i 720x480(1440x480) 59.94 (29.97) 15.7
576i 720x576(1440x576) 50 (25) 15.6
480p 720x480 59.94 31.5
576p 720x576 50 31.3
720p 1280x720 60 45.0
720p 1280x720 50 37.5
1080i 1920x1080 60 (30) 33.8
1080i 1920x1080 50 (25) 28.1
1080p1920x108023.97/2427.0
1080p 1920x1080 60 67.5
1080p 1920x1080 50 56.3
Graphic source 
monitor range 
limitsHorizontal scan rate: 30k~102kHz
Vertical scan rate: 50~120Hz
Max. pixel rate 150MHz