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A good user manual
The rules should oblige the seller to give the purchaser an operating instrucion of Optoma Technology HD20, along with an item. The lack of an instruction or false information given to customer shall constitute grounds to apply for a complaint because of nonconformity of goods with the contract. In accordance with the law, a customer can receive an instruction in non-paper form; lately graphic and electronic forms of the manuals, as well as instructional videos have been majorly used. A necessary precondition for this is the unmistakable, legible character of an instruction.
What is an instruction?
The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of Optoma Technology HD20 one could find a process description. An instruction's purpose is to teach, to ease the start-up and an item's use or performance of certain activities. An instruction is a compilation of information about an item/a service, it is a clue.
Unfortunately, only a few customers devote their time to read an instruction of Optoma Technology HD20. A good user manual introduces us to a number of additional functionalities of the purchased item, and also helps us to avoid the formation of most of the defects.
What should a perfect user manual contain?
First and foremost, an user manual of Optoma Technology HD20 should contain: 
							 - informations concerning technical data of Optoma Technology HD20 
							 - name of the manufacturer and a year of construction of the Optoma Technology HD20 item 
							 - rules of operation, control and maintenance of the Optoma Technology HD20 item 
							 - safety signs and mark certificates which confirm compatibility with appropriate standards 
Why don't we read the manuals?
Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of Optoma Technology HD20 alone are not enough. An instruction contains a number of clues concerning respective functionalities, safety rules, maintenance methods (what means should be used), eventual defects of Optoma Technology HD20, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the Optoma Technology service. Lately animated manuals and instructional videos are quite popular among customers. These kinds of user manuals are effective; they assure that a customer will familiarize himself with the whole material, and won't skip complicated, technical information of Optoma Technology HD20.
Why one should read the manuals?
It is mostly in the manuals where we will find the details concerning construction and possibility of the Optoma Technology HD20 item, and its use of respective accessory, as well as information concerning all the functions and facilities.
After a successful purchase of an item one should find a moment and get to know with every part of an instruction. Currently the manuals are carefully prearranged and translated, so they could be fully understood by its users. The manuals will serve as an informational aid.
Table of contents for the manual
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                            Page 11 English T able of Contents ................................................................................... 1 Usage Notice .......................................................................................... 2 Safety Information ......................................................................................... 2 Precautions.......[...] 
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                            Page 22 U s a g e N o t i c e Safety Information The lightning fl ash with arrow head within an equilateral triangle is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure that may be of suffi cient magnitude to constitute a risk of electric shock to persons. The exclamation point within an[...] 
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                            Page 33 English U s a g e N o t i c e  When the lamp reaches the end of its life, the projector will not turn back on until the lamp module has been replaced. T o replace the lamp, follow the procedures listed under “Replacing the Lamp” section on pages 42-43. Precautions Please follow all warnings, precautions and maintenance as recommended in th[...] 
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                            Page 44 U s a g e N o t i c e Do:  T urn off and unplug the power plug from the AC outlet before cleaning the product.  Use a soft dry cloth with mild detergent to clean the display housing.  Disconnect the power plug from AC outlet if the product is not being used for a long period of time. Do not:  Block the slots and openings on the unit p[...] 
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                            Page 55 English U s a g e N o t i c e Eye Safety W arnings ▀ ■ Avoid staring/facing directly into the projector beam at all times. Keep your back to the beam as much as possible. ▀ ■ When projector is used in a classroom, adequately supervise students when they are asked to point out something on the screen. ▀ ■ In order to minimize the lamp [...] 
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                            Page 66 I n t rod uc t ion Power Cord 1.8 m IR Remote Control Package Overview Unpack and inspect the box contents to ensure all parts listed below are in the box. If something is missing, please contact your nearest customer service center . Documentation :  User ’s Manual  W arranty Card  Quick Start Card  WEEE Card (for EMEA only)  Du[...] 
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                            Page 77 English I n t rod uc t ion 1. Control Panel 2. Zoom Ring 3. Focus Ring 4. Zoom Lens 5. IR Receivers Main Unit Product Overview 6. T ilt-Adjustment Feet 7. Security Bar 8. Input / Output Connections 9. Power Socket SERVICE VGA/SCART/YPbPr Y VIDEO Pb Pr HDMI 1 HDMI 2 12V OUT POWER SOURCE 7 8 6 POWER SOURCE 2 6 5 3 4 1 5 9[...] 
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                            Page 88 I n t rod uc t ion Control Panel 1. Source 2. Menu 3. Enter 4. Re-Sync 5. Power 6. Four Directional Select Keys 7. On/Standby LED 8. Lamp Fail LED 9. T emp LED 10. IR Receiver POWER SOURCE 6 5 1 2 3 4 9 8 7 10[...] 
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                            Page 99 English I n t rod uc t ion Input / Output Connections 1. Service Connector 2. VGA/SCART Connector (PC Analog Signal/Component Video Input/HDTV/SCAR T) 3. Component Video Input Connectors 4. Composite Video Input Connector 5. HDMI 1 Connector 6. HDMI 2 Connector 7. 12V T rigger Relay Connector 8. Power Socket 9. Kensington TM Lock Port 10. Securit[...] 
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                            Page 1010 I n t rod uc t ion Remote Control 1. Power On 2. Power Off 3. 16:9 4. Native 5. Contrast 6. Overscan 7. Enter 8. Re-Sync 9. D-Sub Source 10. Video Source 1 1. HDMI 2 Source 12. YPbPr Source 13. HDMI 1 Source 14. Menu 15. Source 16. Source Lock 17. EdgeMask 18. Brightness 19. LBX 20. 4:3 21. Lamp Mode 22. Mode 23. Four Directional Select Keys Lam[...] 
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                            Page 1111 English I n stall ation SERVICE VGA/SCART/YPbPr Y VIDEO Pb Pr HDMI 1 HDMI 2 12V OUT E62405SP R MOLEX Connecting the Projector Connect to Computer/Notebook 1 3 1....................................................................................................Power Cord 2...........................................................................[...] 
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                            Page 1212 I n stall ation Connect to Video Sources 1....................................................................................................Power Cord 2................................................................................................... *VGA Cable 3.................................................................................[...] 
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                            Page 1313 English I n stall ation Powering On the Projector 1. Remove th e lens cap.  2. Securely connect the power cord and signal cable. When connected, the ON/ST ANDBY LED will turn Amber . 3. Turn on the lamp by pressing “ ” button either on the top of the projector or on the remote. The ON/ST ANDBY LED will now turn Green.  The startup scre[...] 
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                            Page 1414 I n stall ation W arning Indicator  When the “LAMP” indicator lights Red (“ON/ST ANDBY” indicator fl ashes Amber), the projector will automatically shut down. Please contact your nearest service center for assistance.  When the “TEMP” indicator lights Red (“ON/ST ANDBY” indicator fl ashes Amber), it indicates the projecto[...] 
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                            Page 1515 English I n stall ation Adjusting the Projected Image Adjusting the Projector ’s Height The projector is equipped with elevator feet for adjusting the image height. 1. Locate the adjustable foot you wish to modify on the underside of the projector . 2. Rotate the adjustable ring counter clockwise to raise the projector or clockwise to lower it[...] 
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                            Page 1616 I n stall ation Adjusting the Projector ’s Zoom / Focus POWER ? Focus Ring Zoom Ring Y ou may turn the zoom ring to zoom in or out. T o focus the im- age, rotate the focus ring until the image is clear . The projector will focus at distances from 4.89 to 32.68 feet (1.49 to 9.96 meters). Adjusting Projection Image Size  This table is for us[...] 
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                            Page 1717 English U s e r Con t ro l s Using the Control Panel Power Refer to the “Power On/Off the Projector” section on pages 13-14. RE-SYNC Automatically synchronize the projector to the input source. Enter Confi rm your item selection. SOURCE Press “SOURCE” to select an input signal. Menu Press “Menu” to launch the on-screen display (OSD)[...] 
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                            Page 1818 U s e r Con t ro l s Lamp Remote Control Using the Remote Control Power On Refer to the “Power On” section on page 13. Power Off Refer to the “Power On/Off the Projector” section on page 14. Lamp Mode Increase the brightness of the image. (refer to page 33) Mode Select the display mode from Cinema, Bright, Photo, Reference and User . 4:3[...] 
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                            Page 1919 English U s e r Con t ro l s Remote Control Lamp Using the Remote Control Enter Confi rm your item selection. Source Press “Source” to select an input signal. Re-sync Automatically synchronizes the projector to the input source. Menu Display or exit the on-screen display menus for projector . HDMI 1 Press “HDMI 1” to choose source from [...] 
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                            Page 2020 U s e r Con t ro l s The Projector has multilingual On-screen Display menus that allow you to make image adjustments and change a variety of settings. The projector will automatically detect the source. How to operate 1. T o open the OSD menu, press “Menu” on the Remote Control or Projector Keypad. 2 When OSD is displayed, use keys to select[...] 
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                            Page 2121 English U s e r Con t ro l s Menu T ree *  ( # ) “B/W Extension” can’t support when source is HDMI, analog or digital RGB via DVI port.  (*) “Signal” is not supported when the source is HDMI or DVI-D.  (**) “IRE” is only supported on NTSC signal. N ote N ote RGB Video #[...] 
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                            Page 2222 U s e r Con t ro l s IMAGE Mode There are many factory presets optimized for various types of images.  Cinema: For home theater .  Bright: Maximum brightness input.  Photo: Optimized for displaying photographic images.  Reference: This mode is intended to reproduce, as close as possible, the image the way the movie director intended.[...] 
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                            Page 2323 English U s e r Con t ro l s IMAGE Color Adjust a video image from black and white to fully saturated color .  Press the to decrease the color saturation in the image.  Press the to increase the color saturation in the image. T int Adjust the color balance of red and green.  Press the to increase the amount of green in the image.  Pr[...] 
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                            Page 2424 U s e r Con t ro l s IMAGE | Advanced Noise Reduction The motion Adaptive Noise Reduction reduces the amount of visible noise interlaced signals. The range is from “0” to “10”. (0: Off) B/W Extension Black and White Extension can stretch the black and white levels to automatically increase the contrast of input image. This unit has 2 pre[...] 
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                            Page 2525 English U s e r Con t ro l s IMAGE | Advanced Gamma This allows you to set up gamma curve type. After the initial setup and fi ne tuning is completed, utilize the Gamma Adjustment steps to optimize your image output.  Film: for home theater .  Video: for video or TV source.  Graphics: for image source.  Standard: for standardized se[...] 
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                            Page 2626 U s e r Con t ro l s DISPLA Y Format Use this function to choose your desired aspect ratio.  4:3: This format is for 4x3 input sources.  16:9: This format is for 16x9 input sources, like HDTV and DVD enhanced for Widescreen TV .  Native: This format displays the original image without any scaling.  LBX: This format is for non-16x9, l[...] 
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                            Page 2727 English U s e r Con t ro l s LBX format 16 : 9 format or 4 : 3 format Input Signal Display area Picture area Display on Screen Detail informations about LBX mode : 1. Some Letter-Box DVDs are not enhanced for 16x9 TVs. In this situation, the image will not look right when displayed in 16:9 mode. In this situation, please try to using the 4:3 mod[...] 
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                            Page 2828 U s e r Con t ro l s Overscan Overscan function removes the noise in a video image. Overscan the image to remove video encoding noise on the edge of video source. Edge Mask  Press the to reduce the size of an image.  Press the to magnify an image on the projection screen. V Image Shift Shift the projected image position vertically . V Keys[...] 
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                            Page 2929 English U s e r Con t ro l s DISPLA Y  “SuperWide“ is “Off“ as default. N ote N ote SuperWide SuperWide is a feature that uses a special 2.0:1 aspect ratio screen enabling both 16:9 and 2.35:1 aspect ratio movies to be shown without black bars at the top and bottom of the screen  Off: Y our desired aspect ratio can be selected - 4:[...] 
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                            Page 3030 U s e r Con t ro l s SYSTEM Menu Location Choose the menu location on the display screen. Projection  Front-Projection This is the default selection. The image is projected straight on the screen.  Rear-Desktop When selected, the image will appear reversed.  Front-Ceiling When selected, the image will turn upside down.  Rear-Ceiling [...] 
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                            Page 3131 English U s e r Con t ro l s SYSTEM Image AI Image AI improves the contrast of the picture by optimizing the brightness of the lamp according to the picture content.  On: The dynamic image performance manager is active in making sure your greatest pleasure from seeing a movie dynamically with the most dark details revealed, vivid and bright i[...] 
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                            Page 3232 U s e r Con t ro l s SYSTEM T est Pattern Display a test pattern. There are Grid, White pattern and None. Background Color Use this feature to display a “Dark Blue”, “Black”, or “Gray” screen when no signal is available. 12V T rigger 12V trigger provides a standard trigger for motorized screens.  “12V OUT” is only for trigger [...] 
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                            Page 3333 English U s e r Con t ro l s SYSTEM | Lamp Settings Lamp Hour Display the cumulative lamp operating time. Lamp Reminder Choose this function to show or to hide the warning message when the changing lamp message is displayed. The message will appear up 30 hours before suggested replacement of lamp. Bright Mode Choose “On” to increase the brig[...] 
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                            Page 3434 U s e r Con t ro l s SETUP Language Choose the multilingual OSD menu. Press or into the sub menu and then use the or key to select your preferred language. Press “Select (Enter)” to fi nalize the selection. Input Source Use this option to enable / disable input sources. Press to enter the sub menu and select which sources you require. Press[...] 
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                            Page 3535 English U s e r Con t ro l s Source Lock When this function is turned off, the projector will search for other signals if the current input signal is lost. When this function is turned on, it will search for a specifi ed connection port. High Altitude Choose “On” to turn on High Altitude mode. Operates the fans at full speed continuously to[...] 
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                            Page 3636 U s e r Con t ro l s Signal  Phase: Change the display data frequency to match the frequency of your computer ’s graphic card. When you experience a vertical fl ickering bar , use this function to make an adjustment.  T racking: Synchronize the signal timing of the display with the graphics card. If you experience an unstable or fl ick[...] 
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                            Page 3737 English U s e r Con t ro l s Signal  White Level: Allow user adjust White Level when inputting S-Video or V ideo/CVBS signals.  Black Level: Allow user adjust Black Level when inputting S-Video or V ideo/CVBS signals.  Saturation: Adjust a video image from black and white to fully saturated color . Press the to decrease the amount of co[...] 
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                            Page 3838 A p p e nd ices Image Problems No image appears on-screen  Ensure all the cables and power connections are correctly and securely connected as described in the “Installation” section.  Ensure all the pins of connectors are not bent or broken.  Check if the projection lamp has been securely installed. Please refer to the “Replacing[...] 
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                            Page 3939 English A p p e nd ices 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” button on the remote control or projector panel, go to “Display  Format” and try the different settings. Image has slanted sides  If possible, r[...] 
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                            Page 4040 A p p e nd ices Projector Status Indication LED lighting message Message ON/STANDBY LED Temp-LED Lamp-LED (Green/Amber) (Red) (Red) Standby State (Input power cord) Amber Power on (W arming) Flashing Green Lamp lighting Green Power off (Cooling) Flashing Green Error (Over T emp.) Flashing Amber Error (Fan fail) Flashing Amber Flashing Error (Lam[...] 
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                            Page 4141 English A p p e nd ices On Screen Messages  Fan failed: The projector will switch off automatically .  Over temperature: The projector will switch off automatically .  Replacing the lamp: Lamp is approaching the end of it’s rated life. Replcement suggested. Remote Control Problems If the remote control does not work  Check the oper[...] 
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                            Page 4242 A p p e nd ices Replacing the lamp The projector automatically detects the lamp life. When the lamp life is nearing the end of use, you will receive a warning message. When you see this message, please contact your local reseller or service center to change the lamp as soon as possible. Make sure the projector has been cooled down for at least 3[...] 
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                            Page 4343 English A p p e nd ices Lamp Replacement Procedure: 1. Switch off the power to the projector by pressing the “ ” button. 2. Allow the projector to cool down for at least 30 minutes. 3. Disconnect the power cord. 4. Unscrew the two screws on the cover . 1 5. Lift up and remove the cover . 2 6. Unscrew the two screws on the lamp module. 3 7. L[...] 
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                            Page 4444 A p p e nd ices Compatibility Modes  Computer Compatibility  For widescreen resolution (WXGA), the compatibility support is dependent on Notebook/PC models. Mode Resolution V .Frequency (Hz) A Analog Digital SVGA 800 x 600 56   800 x 600 60   800 x 600 72   800 x 600 75   800 x 600 85   XGA 1024 x 768 60  ?[...] 
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                            Page 4545 English A p p e nd ices  Video Compatibility NTSC M (3.58MHz), 4.43 MHz P AL B, D, G, H, I, M, N SECAM B, D, G, K, K1, L SDTV/HDTV 480i/p, 576i/p, 720p@50Hz/60Hz, 1080i/p@50Hz/60Hz[...] 
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                            Page 4646 A p p e nd ices  Please note that damage resulting from incorrect installation will invalidate the warranty . Ceiling Mount Installation 1. T o prevent damage to your projector , 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 mount to the projector meet the[...] 
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                            Page 4747 English A p p e nd ices Optoma Global Offi ces For service or support please contact your local offi ce. USA 715 Sycamore Drive T el : 408-383-3700 Milpitas, CA 95035, USA Fax: 408-383-3702 www .optomausa.com Service : services@optoma.com Canada 5630 Kennedy Road, Mississauga, T el : 905-361-2582 ON, L4Z 2A9, Canada Fax: 905-361-2581 www .opto[...] 
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                            Page 4848 A p p e nd ices Korea WOOMI TECH.CO.,L TD. 4F ,Minu Bldg.33-14, Kangnam-Ku, T el : +82+2+34430004 seoul,135-815, KOREA Fax: +82+2+34430005 Japan 東京都足立区綾瀬 3-25-18 株式会社オーエスエム E-mail : info@osscreen.com サポートセンター : 0120-46-5040 www .os-worldwide.com T aiwan 5F ., No. 108, Minchiuan Rd. T el : +886-[...] 
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                            Page 4949 English A p p e nd ices Regulation & Safety notices This appendix lists the general notices of your projector . FCC notice This device has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference i[...] 
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                            Page 5050 A p p e nd ices Operation conditions This device complies with Part 15 of the 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 interference received, including interference that may cause undesired operation. Notice: Canadian users This Class B d[...] 

