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TH681 Digital Pr ojector User Manual.
Table of contents 2 Ta b l e o f c o n t e n t s Important safety instructions ........................... 3 Introduction .......................... 7 Projector featu res .......... ............. .......... .... 7 Shipping content s ............... ..
Important safety inst ructions 3 Impor tant safety instructions Y our projector is designed and tested to meet the latest st andards for safety of information technology equipment. Howev er , to ensur e safe use of this product, it is important that you follow the instructions mentioned in th is manual and mark ed on the pr o duct.
Important safety inst ructions 4 Safety Instructions (Continued) 7. The lamp becomes extr emely hot during operation. Allow the pr ojector to cool for appro xima tely 45 minutes prior to removing t he lamp assembly for r eplacement. 8. Do not operate lamps beyond the rated lamp life.
Important safety inst ructions 5 Safety Instructi ons (Continued) 13. Do not place this projector in an y of the following envir onments. - Space that is poorly ventilated or confined. Allow at least 50 cm clearance fr om walls and free flo w of air aroun d the projector .
Important safety inst ructions 6 Safety Instructi ons (Continued) 17. Do not step on the projector or place any objects upon it. Besides pr obable ph ysical damage to the projector , doing so ma y result in accident s and possible injur y . 18. Do not place liquids near or on the projector .
Introduc tion 7 Intr oduction Pr ojector featur es The pr ojector offers the follo wing featur es • Full HD com patible The proje c tor is compatible with Standard Def inition TV (SDTV) 480i, 480p , 576i, 576p and High Definition TV ( HDTV) 720p , 1080i and 1080p formats, with the 1080p fo rmat pr oviding a true 1:1 image repr oduction.
Introduction 8 Shipping contents Carefull y unpack and verify that y ou hav e all of the items shown belo w . If any of these items are missing, please contact y our place of purchase. Standard accessories The supp lied accesso ries will be suitable fo r your region, and ma y differ from those illustrated.
Introduc tion 9 Pr ojector exterior view 1. External control panel (See "Contr ols and funct ions" on page 10 for details.) 2. Lamp cover 3. V ent (heated air exhaust) 4. Quick-release button 5. Lens cap 6. Focus and Zoom ring 7. V ent (cool air intake) 8.
Introduction 10 Contr ols and functions Pr o jector 1. F ocus ring Adjusts the focus of the pr ojected image. 2. Zoom ring Adjusts the size of the image . 3. T op IR remote sens or 4. MENU/EXIT T urns on the On-Screen Displa y (OSD) menu. Goes back to pr evious OSD menu, exits and sa ves menu se ttings.
Introduc tion 11 Remote contr ol 1. POWER T oggles the projector between standb y mode and on. 2. Info Shows the status information of the projector . 3. MENU/EXIT T urns on the On-Screen Displa y (OSD) menu. Goes back to previous OSD menu, exits and sa ves menu se ttings.
Introduction 12 Remote contr ol effective range The remote control m ust be held at an angle within 30 degr ees perpendicular to the projector's IR r emote control sensor(s) to function corre ctly . The distance between the remote contr ol and the sensor(s) should not exceed 8 meters (~ 26 feet).
Positioning your project or 13 P ositioning y our projector Choosing a location Y our projector is designed to be installed in one of four possible in stallation loca tions: Y our room la yout or personal prefer ence will dictate which installation locatio n you select.
Positioning your project or 14 Obtaining a pr eferr ed pr ojected image size The distance from the pr ojector lens to the screen, the zoom setting, and the video format each factors in the p rojected image size.
Positioning your project or 15 Installation for a 4:3 ratio scr een The illustrations and table below are pro v ided for those users who alr eady have 4:3 aspect ratio screens or intend to pur chase 4:3 aspect ratio scr eens to view 16:9 ratio projected images.
Connection 16 Connection When connecting a sig nal sour ce to the projector , be sure to: 1. T urn all equipment off bef ore making any connections. 2.
Connection 17 • If you wish to use this connection method when the proje ctor is in standby mode, make sur e the Monitor Out function is turned on in the SYSTEM SETUP: Advanced men u.
Operat ion 18 Operation Star ting up the pr ojector 1. Plug the power cord into the pr ojector and into a powe r outlet. T urn on the power outlet switch (where fitted). Check that the PO WER in dicator light on t he projector lights orange after power has been applied.
Operation 19 Adjusting the pr ojected image Adjusting the pr ojection angle The projector is equipp ed with 1 quick-release adjuster foot and 1 rear adjuster f o ot. These adjusters change the ima ge height and projection angle. T o adjust the projector: 1.
Operat ion 20 Corr ecting k eystone K eystoning ref ers to the situation w here the projected imag e is noticeabl y wider at either the top or bottom. It occurs when the pr o j ector is not perpendicular to the screen. T o correct this, you will need to manually corr ect it following ONE of these steps.
Operation 21 Using the menus The projector is equipp ed with On-Scr een Displa y (OSD) menus for making various adjustment s and settings. The OSD screenshots below are f or refe rence on l y , and may differ fr om the actual design. Below is the ov erview of the OSD menu.
Operat ion 22 Securing the pr ojector Using a security cable lock The projector has to be installed in a safe pl ace to prev ent theft. Otherwise , purchase a lock, such as the K e nsington lock, to secur e the pr ojector . Y ou can locate a K ensington lock slot on the rear side of the pr ojector .
Operation 23 If you f orget the passw ord If the passw ord function is activated, y ou will be ask e d to enter the six-digit password e ver y time you turn on the projector . If you enter the wrong passw ord, the passw ord error message as pictur ed to the right appears lasting f or 3 seconds, and the INPUT PA S S W O R D message follows.
Operat ion 24 Disabling the passw ord function T o disable password pr otection, go back to the SY STEM SETUP: Advanced > Security Settings > Change Security Settings menu after opening the OSD menu system . Press MODE/ENTER. The messag e “INPUT P ASSW ORD” appears.
Operation 25 Changing Color Space In the unlik ely ev ent that you connect the pr ojecto r to a D VD play er via the projector’ s HDMI input and the pr ojected picture displa ys wrong colors, please change the color space to YUV . To d o t h i s : 1.
Operat ion 26 2. Press Aspect repeatedl y to select an aspect rati o to suit the format of the video signal and your displa y requir ements . • Using the OSD menu 1. Press MENU/EXIT and then pr ess / until the DISPLA Y menu is highlighted. 2. Press to highlight Aspect Ratio .
Operation 27 Optimizing the image Using W all Color In the situation wher e you ar e pr ojecting on to a colored surface such as a painted w all which ma y not be white, the W all Color feature can help cor rect the pr ojected picture’ s colors to pre vent possible color difference betw een the sour ce and pr ojected pictures.
Operat ion 28 6. Press to select a menu item to be ch a nged and adjust the value with / . See "Fine-tuning the image quality in user modes" below for details. Fine-tuning the image quality in user modes According to the detected signal type and selected pictur e mo de, some of the below functions ma y not be available.
Operation 29 Setting a pr eferr ed color temperatur e T o set a preferr ed color temperature: 1. Highlight Color Temperature and select Wa rm , Normal or Cool by pr essing / on the projector or remote control. 2. Press to highlight Color Temperature F i ne Tuning an d press MODE/ ENTER .
Operat ion 30 Please ref er to the illustration to the right for how the colors relate to each other . For example, if you select Red and set its range at 0, only pur e red in the projected picture will be selected. Incr easing its range will include red close to yellow and r ed close to magenta.
Operation 31 4. Press to highlight Timer Position and set the timer position by pressing / . 5. Press to highlight Timer Counting Dir ection and select y our desir ed counting direction b y pres sing / . 6. Press to highlight Sound Remin der and decide if you want to activate sound reminder b y pressin g / .
Operat ion 32 Hiding the image In order to dra w the audience's full attention to the pr esenter , you can use ECO BLANK on the projector or r emote control to hide the screen image. When this function is activated with an audio input connected, the audio can still be heard.
Operation 33 symptoms. How ever , this is not to state that th is proj ector can operate under an y and all harsh or extreme conditions. Adjusting the sound The sound adjustments made as below will ha ve an effect on the projector speak er(s). Be sure y ou hav e made a correct connect ion to the pr ojector audio input.
Operat ion 34 Using the teaching templates The pr ojector provides sev eral preset patterns for various teaching purposes . T o activate the pattern: 1. Open the OSD menu and go to the DISPLAY > Teaching Template and press / to select Blackboard or White board .
Operation 35 Shutting down the pr ojector 1. Pr ess POWER and a confirmation message will display pr ompting you. If you don't respond in a f ew seconds, the message will disappear .
Operat ion 36 Menu operation Menu system Please note that the on-screen displa y (OSD) menus var y according to the signal type selected and the projector model y ou are usin g. Main menu Sub-men u Options 1. DISPLAY Wall Color Off/Light Yellow/Pink /L ight Green/Blue/ Blackboard Aspect Ratio Auto/Real/ 4:3/16:9/16: 10 Keystone Position Phase H.
Operation 37 Main menu Sub-menu Options 4. SYSTEM SETUP: Basic Presentation Timer Timer Period 1~240 minute s Timer Display Alwa ys/3 min/2 min/1 min/Ne ver Timer Position T op-Left/Bottom-Left/T op -.
Operat ion 38 Note that the menu items ar e available when th e projector detects at least one valid signal. If there is no equipment connected to the pr ojector or no signal detected, limited menu items are accessible.
Operation 39 Description of each menu Function Description Wall Color Corre cts the pr ojected picture’ s color when the projection s urface is not white. See "Using W all Color" on page 27 for details. Aspect Ratio There are sev era l options to set the image's aspect ratio depending on your input signal source.
Operat ion 40 Function Description 3D This projector f eatures a 3D function which enables y ou to enjoy the 3D movies, videos, and sporting events in a more r eal istic wa y by presentin g the depth of the images. Y ou need to wear a pair of 3D glasses to vi ew the 3D images.
Operation 41 Function Description Picture Mode Pre-de fined pictur e modes are pr ovided so you can optimize your projector image set-up to su it your program type.
Operat ion 42 Function Description Quick Auto Search See "Switching input signal" on page 24 for details. Color Space Conversion See "Changing Color Space" on page 25 for details. Presentation Timer Reminds the presenter to finis h the pres entation within a certain time frame.
Operation 43 Function Description Operation Settings Direct Power On Allows the projector to turn on au tomatically once the power is f ed through the pow er cord. Signal Power On Sets whether to turn the projecto r directly on without pr essing PO WER or ON when the pr ojecto r is in standby mode and the signal is feed thr o ugh the V GA cable .
Operat ion 44 Function Description High Altitude Mode A mode for operation in high altitude areas. See "Operating in a high altitude envir onment" on page 32 for det ail s. Audio Settings See "Adjusting the sound" on page 33 for details.
Operation 45 Function Description Standby Settings Monitor Out Selecting On enables the function. The pr ojector can output a V GA signal when it is in s tandby mode and the COMPUTER 1 jack is corr ectly connected to devices. S ee "Connection" on page 16 for h ow to mak e the connection.
Maintenance 46 Maintenance Car e of the projector Y our projector needs little maintenance. The on ly thing y ou need to do on a r egular basis is to keep th e lens and case clean. Nev er remove an y parts of the projector except the lamp . Contact your dealer if other parts need replacing.
Maintenance 47 Lamp information Getting to know the lamp hour When the projector is in operation, the durati on (in hours) of lamp usage is automatically calculated by the built-in timer . T otal (equivalent) lamp hour = 1.63 x (hours used in No rmal mode) + 1.
Maintenance 48 Timing of r eplacing the lamp When the Lamp indicat or lights up r ed or a message appears suggesting i t is time to replace the lamp , please install a new lamp or consult your dealer . An old lamp may cause a malfunction in the pr ojector and in some instances the lamp ma y explode.
Maintenance 49 Replacing the lamp • T o reduce the ri sk of electrical shock, alwa ys turn the projector off and disconnect the po wer cord before changing the l amp. • T o reduce the risk of sev e re burns, allow the pr ojector to cool for at least 45 minutes before r eplacing the lamp.
Maintenance 50 12. Connect the pow er and restart the pr ojector . Do not turn the power on with the lamp cover r emoved. Resetting the lamp tim er 13. After the startup logo , open the On-Sc reen Displa y (OSD) menu. Go to the SYSTEM SETUP: Advanced > Lamp Settin gs menu.
Maintenance 51 The Lamp Settin gs page appears. Highlight Reset Lamp Timer . A warning message appears asking if y ou want to reset the lamp timer . Highlight Reset and pres s MODE/ENT ER . The lamp time will be reset to “0”. Do not reset if the lamp is not new or replaced as this could cause damage .
Maintenance 52 Indicators Light Status & Description Po w e r e v e n t s Orange Off Off Stand-by mode. Green Flashing Off O ff P owering up . Green Off Off Normal operation.
Troubleshooting 53 T r oubleshooting The projector does not turn on. No picture Blurr ed image Remote contr ol does not work The passw ord is incorrect Cause Remedy There is n o pow er from the p ower cord. Plug the po wer cor d into the A C power jack on the pro jector , and plug the po wer cor d into the power outlet.
Specifications 54 Specifications Pr ojector specifications All specifications ar e subject to change without notice . Optical Resolution 1920 (H) x 1080 (V) Display system 1-CHIP DMD Lens F/Number F = 2.59 ~ 2.87, f = 16.88 ~ 21.88 mm Lamp 210 W lamp Electrical Power supp ly AC100–240V , 3.
Specificatio ns 55 Dimensions 311.81 mm (W) x 104.7 mm (H) x 244.12 mm (D) Ceiling mount installation 311.81 244.12 104.7 Unit: mm 626.11 582.2 537.9 25 95.
Specifications 56 Timing char t Suppor ted timing for PC input • *Supported timing for 3D signal in Frame Sequential , Top Bottom and Side by Side formats. **Suppor ted timing for 3D signal in Frame Sequential fo rmat . ***Supported timing for 3D signal in Top Bottom and Side by Side fo rmat.
Specificatio ns 57 • The timings showing above ma y not be su pported due to EDID file and V GA graphic card limitations. It is possible that some timings cannot be chosen. Suppor ted timing for HDMI (HDCP) input • *Supported timing for 3D signal in Frame Sequential , Top Bottom and Side by Side formats.
Specifications 58 • The timings showing above ma y not be su pported due to EDID file and V GA graphic card limitations. It is possible that some timings cannot be chosen. *Suppor ted timing for 3D signal in Frame Sequential form at. **Supported timing for 3D signal in Top Bottom , Frame Packing and Side by Side formats.
Specificatio ns 59 Suppor ted timing for Video and S-Video inputs *Suppor ted timing for 3D signal in Frame Sequential form at. Video mode Horizontal Freq ue nc y ( kH z) Ve r t i c a l F r e q u e n c y (Hz) Color sub-carrier Fr equency (MHz) NTSC* 15.
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