Manual Optoma DS311

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  • Optoma DS311 - page 1

    EN-1 CONTENTS Usage Notice ............. .............. .............. .............. .............. .............. .. 2 Safety Instructions ............................................................................................ ............... ...... 2 Introduction . .............. ........... .............. .............. .............. .... ...

  • Optoma DS311 - page 2

    EN-2 Usage Notice Safety Instructions Read all of these instructions before you operate your projector and save for future reference. 1. Read instructions All the safety and operating instructions should be read before the appliance is operated. 2. Notes and warnings All notes and warnings in the oper ating instructions should be adhered to. 3. Cle ...

  • Optoma DS311 - page 3

    EN-3 9. Moisture Conden sation Never operate this projector immediat ely after moving it from a cold location to a warm one. When the projector is exposed to such a change in temperature, moisture may conde nse on the lens and the crucial internal parts. T o prevent the unit from possible damage, do not use the projector for at least 2 ho urs when ...

  • Optoma DS311 - page 4

    EN-4 Notes on the AC Power Cord AC Power Cord must meet the requirement of countries wh ere you use this proje ctor . Please confirm your AC plug type with the graphics below and ensure that the proper AC Power Cord is used. If the supplied AC Power Cord doe s not match your AC outlet, please contact your sales dealer . This projector is equipped w ...

  • Optoma DS311 - page 5

    EN-5 Introduction Projector Features The projector integrates high-performance optical engine projection and a user - friendly design to deliver high reliability and eas e of use. The projecto r offers the following featur es:  Single chip 0.55" T e xas Instruments DLP ® technology (SVGA/XGA model)  Single chip 0.65" T e xas Instru ...

  • Optoma DS311 - page 6

    EN-6 Package Contents When you unpack the projecto r , make sure you have all these comp onents: Note  For European war ranty informatio n please visit www.optomaeurope.com  Due to the di fference in applications for ea ch country , some regi ons may have differe nt accessorie s.  Contact your dealer immedia tely if any items are missing, ...

  • Optoma DS311 - page 7

    EN-7 Projector Overview Front V iew Front IR remote control sen- sor V entilation holes Elevator foot Zoom ring Projection lens Control panel Focus ring Lamp cover Speaker 3 2 5 1 6 4 7 8 9 Airflow Out Airflow In 1 6 2 7 3 8 4 9 5 ...

  • Optoma DS311 - page 8

    EN-8 Rear V iew AC power socket Connection ports Kensington lock Bottom Vi ew Security bar Ceiling mount holes Note  This projector can be used with a ceiling mo unt f or support. The ceil ing mount is not incl uded in the package.  Contact your dealer for inf ormation to mount the projecto r on a ceiling . 1 2 3 1 2 3 Without HDMI models HDM ...

  • Optoma DS311 - page 9

    EN-9 Using the Product Control Panel Keystone ( / ) Manually correct distorted ima ges re sulting from an angled projection. TEMP (T em p LED indicato r) Refer to “LED Indicator Messag es” on page 57 . SOURCE Switch between input signals. POWER (Power LED indicator) Refer to “LED Indicator Messages” on page 57 . Power T urn the projector on ...

  • Optoma DS311 - page 10

    EN-10 Connection Ports AUDIO-IN 1 Connect an audio output from a computer to this jack connector . S-VIDEO Connect S-V ideo output from vid eo equipment to this jack. VGA1/YPbPr Connect image input signal (analog RGB or compone nt) to this jack. VGA-OUT Connect to an external monitor . In Eco mode (Standby), VGA-OUT is disabled. In Active mode (Sta ...

  • Optoma DS311 - page 11

    EN-11 AUDIO-OUT Connect to an external speaker syste m. Audio loop through is suppor ted from Audio 1, 2 and HDMI. In Eco mode (Standby), AUDIO-OUT is disabled. In Active mode (Standby), AUDIO-OUT is enable d. AUDIO-IN 2 Connect an audio output from a vide o device to this jack conne ctor . 10 11 ...

  • Optoma DS311 - page 12

    EN-12 Remote Control Power T urn the projector on or of f. Source Switch between input signals. Left mouse Perform the left button of the mou se when mouse mode is activated. 5 4 7 1 3 2 6 19 17 14 13 15 16 21 22 20 23 24 25 9 8 11 10 12 26 27 18a 5 4 7 1 3 2 6 19 17 14 13 15 16 18b 21 22 20 23 24 25 9 8 11 10 12 26 27 Remote control varies base d ...

  • Optoma DS311 - page 13

    EN-13 Four directional buttons Use four directional butt ons to select items or make adjustments to your selection. "UP" key: When menu is off, up key for emulation of USB mouse. "Left" key: When menu is off, le ft key for emulation of USB mouse. "Right" key: When menu is off, right key f or emulation of USB mouse. &qu ...

  • Optoma DS311 - page 14

    EN-14 V olume (+/-) Adjust the volume level. Menu Display on-screen display menus. Zoom Magnifies or reduces the pr ojected picture size. AV m u t e Momentarily turns o ff/on the audio and video. Vid eo Display video signal. 3D T urn on or off 3D function. USB Switch to mou se mode whe n the on-scre en menus are close. Numbered keypad Press 0 to 9 ...

  • Optoma DS311 - page 15

    EN-15 Installing the Batteries 1. Open the battery cover in the direction shown. 2. Install batteries as indicated by the diagram inside the compartment. 3. Close the battery cover into position. Caution  Risk of explosion if batt ery is replaced by an incorrect type.  Dispose of use d batteries a ccording to the instructions .  Make sure ...

  • Optoma DS311 - page 16

    EN-16 Remote Control Operation Point the remote control at the infrare d remote sensor and press a button.  Operating the projector from the front Note  The remote control may not operate wh en there is sunlight or other strong light such as a fluorescent lamp shining on the remote sensor.  Operate the remote control from a positi on where ...

  • Optoma DS311 - page 17

    EN-17 Connection When connecting a signal source to th e projector , be sure to: 1. T urn all equipment of f before making any connection s. 2. Use the correct signal cab les for each sour ce. 3. Ensure the cables are firmly inserted. 1. ........................... ................................................. ................ *Audio cable 2. . ...

  • Optoma DS311 - page 18

    EN-18 Connecting a computer or monitor Connecting a computer The projector provides two VGA input sockets that allow you to connect them to both IBM ® compatible and Macintosh ® computers. A Mac adapter is needed if you are connecting legacy version Macintosh computers. T o connect the projector to a notebook or desktop computer: 1. T ake the sup ...

  • Optoma DS311 - page 19

    EN-19 Connecting a monitor If you want to view your presentatio n close-up on a monitor as we ll as on the screen, you can connect the VGA-OUT signal output socket on th e projector to an external monitor with a VGA cable following the instructio ns below: T o connect the pr ojector to a monitor: 1. Connect the projecto r to a computer as described ...

  • Optoma DS311 - page 20

    EN-20 Connecting V ideo source devices Y ou can connect your projector to vari ous V ideo source devices that provide any one of the following output sockets:  HDMI  Component V ideo  S-Vi deo  Vid eo (composite) Y ou need only connect the pr ojector to a Vi deo source device using just one of the above connecting metho ds, howev er eac ...

  • Optoma DS311 - page 21

    EN-21 Connecting an HDMI source device Examine your V ideo source device to deter mine if it has a set of unu sed HDMI output jacks available:  If so, you can continue with this procedure.  If not, you will need to reassess whic h method you can use to connect to the device. T o connect the projector to an HDMI sour ce device: 1. T ake an HDM ...

  • Optoma DS311 - page 22

    EN-22 Connecting an S-V ideo source device Examine you r Video source device to determine if it has an unus ed S-Video output socket available:  If so, you can continue with this procedure.  If not, you will need to reassess which method you can use to connect to the device. T o connect the projector to an S-V ideo source device: 1. T ake an ...

  • Optoma DS311 - page 23

    EN-23 Operation Powering On/Off the Projector Powering On the Projector: 1. Connect the AC power cord a nd relevant peri pheral signal cabl e(s) to the projector . 2. Press to turn on the projector . The projector takes a minu te or so to warm up. 3. T urn on your source (computer , notebook, DVD, etc.). The projector automatically detects your sou ...

  • Optoma DS311 - page 24

    EN-24 Adjusting the Projector Height The proje ctor is equipp ed with an e levator foo t to adjust t he image heig ht. 1. T o raise or lower the image, turn th e elevator foot. 2. T o level the image on the screen, turn the tilt-adjustment fo ot to fine-tune the hei ght. Note  T o avoi d damaging the project or , make sure that the elevat or foo ...

  • Optoma DS311 - page 25

    EN-25 Adjusting Projection Image Size Refer to the graphic and table below to determine the screen size and projection distance. SVGA/XGA model WXGA model Note  Position the project or in a horizontal positio n; other positions can cause heat build-up and damage to the projecto r.  Keep a space of 30 cm or more between the side s of the proje ...

  • Optoma DS311 - page 26

    EN-26 Menu Operation The projector has multilingual on-scr een display menus that allow you to make image adjustments and change a var iety of settings. How to operate 1. T o open the OSD menu, press “Menu” on the Remote Contro l or Projector Keypad. 2. When OSD is displayed, use / key to select to select any item in the main menu. While making ...

  • Optoma DS311 - page 27

    EN-27 Menu tree Main Menu Sub-Menu Single-Item Menu IMAGE Display Mode Presentation / Bright / Movie / sRGB / Blackboa rd / User / 3D Brightness Contrast Sharpness Color Tin t Advanced Gamma Film / Video / Graphics / Standard BrilliantColor™ Color T emp. Wa rm / Medium / Cold Color Settings Red Hue / Saturation / Gain Green Hue / Saturation / Gai ...

  • Optoma DS311 - page 28

    EN-28 DISPLA Y Format SVGA / XGA: 4:3 / 16:9 / Native / Auto WXGA: 4:3 / 16:9 or 16 :10 / LBX / Native / Auto Edge Mask Zoom Image Shift H V V Keystone 3D 3D Mode DLP-Link / IR 3D--->2D 3D / L / R 3D Format Auto / SBS / T op and Bottom / Frame Sequential 3D Sync Invert On / Off SETUP Language Projec tion Menu Locatio n Screen T ype 16: 10/16:9 ( ...

  • Optoma DS311 - page 29

    EN-29 * This function is only available for products with HDMI input jack. OPTIONS Input Source VGA1 / VGA2 / Video / S- Video / HDMI* Source Lock On / Off High Altitude On / Of f Information Hid e On / Off Keypad Lock On / Off T est Pattern None / Grid / White IR Function On / Off Background Color Black / Red / Blue / Green / White Remote Setting ...

  • Optoma DS311 - page 30

    EN-30 IMAGE Display Mode There ar e many fac tory preset s optimized f or various ty pes of images .  Presentation: Good color and brightness from PC input.  Bright: Maximum brightness from PC input.  Moive: For hom e theater .  sRGB: Standardised accura te color .  Blackboard: This mode should be selected to achieve optimum color se ...

  • Optoma DS311 - page 31

    EN-31 Tin t Shift colors toward r ed or green. Note  “Color” a nd “Tint” funct ions are only supported und er Video mode. Advanced Gamma This allows you to choose a dega mma table that has been fine -tuned to bring out the best im age quality for the input.  Film: for home theater .  Video: for video or TV source.  Graphics: for ...

  • Optoma DS311 - page 32

    EN-32 Color Sett ings Press / /“Enter” key to enter the n ext menu as below and then use / / / key to select color . Press “Ent er” to finalize the selection .  Red/Green/ Blue/Cyan/Mag enta/Y ellow/White: Use / to toggle Hue/ Saturation/Gain and th en use / to adjust the value.  Reset: Choose “Y es” to return the factory defau lt ...

  • Optoma DS311 - page 33

    EN-33 DISPLA Y Format Use this function to choose your desired aspect ratio. For SVGA/XGA models: For WXGA models: 16:9 or 16:10 depend on “Screen T ype” setting. 16:10 Screen Source 480i/p 576i/p 1080i/p 720p PC 4:3 1024x768 center 16:9 1024x576 center Native D isplays the original image without an y scaling. Auto (Default) If source is 4:3, a ...

  • Optoma DS311 - page 34

    EN-34 16:9 Screen Edge Mask Edge Mask function removes the noise in a video image. Overscan the image to remove video encodi ng noise on the edge of video sour ce. Note  Each I/O has diffe rent setting of “Edge Mask”.  “Edge Mask” and “Zoom” can’t work at same time. Zoom Zoom in and out the images. Image Shif t Shift the project ...

  • Optoma DS311 - page 35

    EN-35  R: Select right eye data. 3D Format  SBS: Use this mode for “Side- by-side” format 3D content.  T op and Bottom: Use this mode for “T op and Bottom” format 3D content.  Frame Sequential : Use this mode for “Frame Sequential” fo rmat 3D content. 3D Sync. Invert  Press the “On” to invert le ft and right frame con ...

  • Optoma DS311 - page 36

    EN-36 SETUP Language Select the language used by the on -screen menu. Press / /“Enter” key to enter the sub menu and then use the / / / key to select your preferred language. Press “Enter” to finalize the selection. Projection Adjust the pictur e to match the o rientat ion of the projector: upright or upside- down, in front of or behind the ...

  • Optoma DS311 - page 37

    EN-37 Use this function to set the how long (Month /Day/Hour) the projector can be used. Once this time has elapsed yo u will be requested to enter your pass- word again. Change Password  First time: 1. Press “Enter” to set the password. 2. The password has to b e 4 digits. 3. Use number button o n the remote to enter your new pa ssword and ...

  • Optoma DS311 - page 38

    EN-38 Logo Use this function to set the desired st artup screen. If changes are made they will take ef fect the next time the projector is powered on.  Default: The default startup screen .  Neutral: Neutral startup screen. Closed Captioning Use this function to set the desired st artup screen. If changes are made they will take ef fect the n ...

  • Optoma DS311 - page 39

    EN-39 OPTIONS Input Source Use this option to enable / disa ble input sources. Press / /“Enter” key to enter the sub menu and se lect which sources you require. Press “Enter” to finalize the selection. T he projector will not search for inputs that are not selected. Source Lock  On: The projector will only sear ch current input connectio ...

  • Optoma DS311 - page 40

    EN-40 Keyp ad Lock When the keypad lock function is “On” , the control panel will be locked how- ever , the projector can be operated by the re mote control. By selecting “Of f”, you will be able to reuse the control panel. Note  T o turn of f the keypad lock, press an d hold “Enter” key on top of the pr ojector for 5 seconds. T est ...

  • Optoma DS311 - page 41

    EN-41  Eco: The VGA-OUT function will not work when the projector is in standby .  Active: The VGA-OUT and AUDIO-OUT functions will work when the projector is in standby . Note  When Power mode (Sta ndby) is set t o Eco (<0.5W), the VGA o utput, Audio pass- through will be deactivated when the projector is in standby . Lamp Settings Lam ...

  • Optoma DS311 - page 42

    EN-42 Appendix Installing the Dust Filter Be sure to follow the steps to install the dust filter . 1. Align the filter with these two hook positions (#1 & #2), the n press it close to the projector from the left side to the right on e. 2. Pre ss the last ho ok positio n (#3) unti l it click s. 3. T urn on the projector , then press “Menu”, ...

  • Optoma DS311 - page 43

    EN-43 Replacing the Lamp As the projector opera tes over time, the brightness of the projector la mp gradually decrea ses and the lamp beco mes more susceptible to breaka ge. We recom mend replacing the lamp if a warning message is displayed. Do not attempt to replace the lamp yo urself. Contact t he qualified service personnel for replacement. Not ...

  • Optoma DS311 - page 44

    EN-44 1. T urn off the proje ctor . 2. Unplug the power cord. 3. Remove the screw in the side of the lamp cover . 1 4. Lift the cover . 2 5. Loosen the screws from the lamp module. 3 6. Raise the handle and pull out t he lamp module slowly and carefully . 4 7. Insert the new lamp modu le into the proje c tor and tig hten the screws. 8. Replace the ...

  • Optoma DS311 - page 45

    EN-45 Ceiling mount installation 1. T o prevent damage to your projecto r , please use the Optoma ceiling mount. 2. If you wish to use a third party ceiling mount kit, please ensure the screws used to attach a mou nt to the projec tor meet the following specificat ions:  Screw type: M4*3  Maximum screw length: 8mm  Minimum screw length : 6 ...

  • Optoma DS311 - page 46

    EN-46 Compatibility Modes Computer Compatibility (*1)1920 x 1200 @60hz only support reduced blanking (*2) 3D timing for T rue 3D projector Input Signal for HDMI (*1)1920 x 1200 @60hz only support reduced blanking (*2)3D timing for T rue 3D projector Signal Resolution Refresh Rate(Hz) Notes for Mac VGA 640 X 480 60/67/72/85 Mac 60/72/85 SVGA 800 X 6 ...

  • Optoma DS311 - page 47

    EN-47 T rue 3D Video Compatibility table  If 3D input is 1080p@24 hz, the DMD should replay with integr al multiple with 3D mode  1080i@25hz and 720p@50hz will run in 100hz; other 3D timing will run in 120hz Vi deo Compatibility Input Resolutions HDMI 1.4a 3D Input Input timing 1280 X 720P @ 50Hz T op - and - Bottom 1280 X 720P @ 60Hz T op - ...

  • Optoma DS311 - page 48

    EN-48 IR Code Customer code: 32CD Key code Printing-key definition 81 Power on/off 3E Switch C3 Source 97 User C4 Re-Sync CB L CC R C6 Up arrow C8 Left arrow C9 Ri ght arrow C7 Do wn arrow ...

  • Optoma DS311 - page 49

    EN-49 The IR codes below are for user-defined remote only . C5 Enter CA Enter N/A Laser C1 Page+ 95 Mode C2 Page- 85 Keystone+ 84 Keystone- 8C V olume + 8F V olu me - 87 Brightness/ 1 88 Menu/2 89 Zoom/3 86 HDMI/4 8B Freeze/5 8A A V mute/6 83 S-Video/7 8E VGA/8 8D Video/9 94 Contrast 96 Eco + 93 3D 79 Power off (single push) 82 Power off 80 Power o ...

  • Optoma DS311 - page 50

    EN-50 RS232 Commands and Protocol Function List RS232 Pin Assignments RS232 Protocol Function List Note  There is a <CR> after all ASCII commands.  0D is the HEX code for <CR> in ASCII code. Baud Rate : 9600 Data Bits: 8 Parity: None Stop Bits: 1 Flow Control : None UART16550 FIFO: Disable Projector Return (Pa ss): P Projector Ret ...

  • Optoma DS311 - page 51

    EN-51 -------------------------- ----------------------------------- -------------------------------- --------------------------- -------------------------------- --------------------------- SEND to projector -------------------------- ----------------------------------- -------------------------------- --------------------------- ----------------- ...

  • Optoma DS311 - page 52

    EN-52 ~XX60 1 7E 30 30 36 30 20 31 0D F ormat 4:3 ~XX60 2 7E 30 30 36 30 20 32 0D 16:9 ~XX60 3 7E 30 30 36 30 20 33 0D 16:10(WXGA) ~XX60 5 7E 30 30 36 30 20 35 0D LBX ~XX60 6 7E 30 30 36 30 20 36 0D Native ~XX60 7 7E 30 30 36 30 20 37 0D Auto -------------------------- ----------------------------------- -------------------------------- ----------- ...

  • Optoma DS311 - page 53

    EN-53 -------------------------- ----------------------------------- -------------------------------- --------------------------- ------------------------------- --------------------------- ~XX77 n 7E 30 30 37 37 20 aabbcc 0D Security Security Timer Month/Day/Hour n = mm/dd/hh mm = 00 (aa=30 30 ) ~ 12 (aa=31 3 2) dd = 00 (bb=30 30) ~ 30 (bb=33 30) ...

  • Optoma DS311 - page 54

    EN-54 ~XX105 1 7E 30 30 31 30 35 20 31 0D Advanced Direct Power On On ~XX105 0 7E 30 30 31 30 35 20 30 0D Off (0/2 for backward compatible) ~XX106 n 7E 30 30 31 30 36 20 a 0D Auto Power Off (min) n = 0 (a=30) ~ 180 (a=31 38 30) ~XX107 n 7E 30 30 31 30 37 20 a 0D Sleep Timer (min) n = 0 (a= 30) ~ 99 0 (a=39 39 39) ~XX115 1 7E 3 0 30 31 31 35 20 31 0 ...

  • Optoma DS311 - page 55

    EN-55 -------------------------- ----------------------------------- -------------------------------- --------------------------- -------------------------------- --------------------------- READ from projec tor -------------------------- ----------------------------------- -------------------------------- --------------------------- -------------- ...

  • Optoma DS311 - page 56

    EN-56 T roubleshooting Refer to the symptoms and measur es lis ted below be fore sending the p rojec- tor for repairs. If the pro blem persists , contact your local reseller or service center . Please refer to "LED Indicato r Messages" as well. Start-up If no lights turn on:  Be sure that the power cord is securely connected to the pro ...

  • Optoma DS311 - page 57

    EN-57 LED Indicator Messages Message Power L ED (Red) Power LED (Green) Te m p L E D (Red) Lamp LED (Red) St a n d b y St a te (Input power cord) S teady light Power on (W ar ming) Flashing 0.5 sec off 0.5 sec light Power on & Lamp lighting S tead y light Power off (Cooling) Flashing 0.5 sec off 0.5 sec light Back to Red steady light when cooli ...

  • Optoma DS311 - page 58

    EN-58 Optoma Global Offices For service or suppor t please conta ct your local of fice. USA 3178 Laurelvie w Ct. Fremont, CA 94538, USA 888-289-6786 www .optomausa.com services@optoma.com Canada 3178 Laurelvie w Ct. Fremont, CA 94538, USA 888-289-6786 www .optomausa.com services@optoma.com Europe 42 Caxton Way , The Watford Business Park W atford, ...

  • Optoma DS311 - page 59

    EN-59 Scandinavia Lerpeveien 25 +47 32 98 89 90 3040 Drammen +47 32 98 89 99 Norway info@optoma.no PO.BOX 9515 3038 Drammen Norway Latin America 3178 Laurelview Ct. Fremont, CA 94538, USA 888-289-6786 www .optoma.com.br www .optoma.com.mx Korea WOOMI TECH.CO.,L TD. 4F ,Minu Bldg.33-14, Kangnam-Ku , +82+2+34430004 seoul,135-815, KOREA +82+2 + 344300 ...

  • Optoma DS311 - page 60

    EN-60 中国 上海市长宁区 +86-21-6294737 6 凯旋路 1205 号 5 楼 +86-21-6294737 5 琉璃奥图码 www .optoma.com.cn ...

  • Optoma DS311 - page 61

    EN-61 Regulation & Safety Notices This appendix lists the general notices of your projector . FCC Notice This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FC C Rules. Th ese limit s are designed to provide reasona ble prot ection ag ainst harmful interference in residenti ...

  • Optoma DS311 - page 62

    EN-62 Operation conditions This device complies with Part 15 of th e FCC Rules. Operation is subject to the following two conditions: 1. This device may not cause harmful interference and 2. This device must accept any inte rference received, in cluding interference that may cause undesired oper ation. Notice: Canadian users This Class B digital ap ...

Manufacturer Optoma Category Video projector

Documents that we receive from a manufacturer of a Optoma DS311 can be divided into several groups. They are, among others:
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- DS311 manuals
- Optoma product data sheets
- information booklets
- or energy labels Optoma DS311
All of them are important, but the most important information from the point of view of use of the device are in the user manual Optoma DS311.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals Optoma DS311, service manual, brief instructions and user manuals Optoma DS311. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product Optoma DS311.

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A complete manual for the device Optoma DS311, how should it look like?
A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use Optoma DS311 by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Optoma DS311.

A complete Optoma manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual Optoma DS311 - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the Optoma DS311, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the Optoma DS311, that we can find in the current document
3. Tips how to use the basic functions of the device Optoma DS311 - which should help us in our first steps of using Optoma DS311
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with Optoma DS311
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of Optoma DS311 in a specific country, if it was not possible to solve the problem on our own.

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