TH681/TH681+ Digital Projector User Manual
Table of contents Important safety instructions ........................... 3 Introduction .......................... 7 Projector features.....................................7 Shipping contents ......................................8 Projector exterior view...........................9 Controls and functions ..........................10 Positioning your projector.............................. 13 Choosing a location................................13 Obtaining a preferred projected image size................
Important safety instructions Your projector is designed and tested to meet the latest standards for safety of information technology equipment. However, to ensure safe use of this product, it is important that you follow the instructions mentioned in this manual and marked on the product. Safety Instructions 1. Please read this manual before you operate your projector. Save it for future reference. 2. Do not look straight at the projector lens during operation.
Safety Instructions (Continued) 4 7. 10. The lamp becomes extremely hot during operation. Allow the projector to cool for approximately 45 minutes prior to removing the lamp assembly for replacement. 8. Do not operate lamps beyond the rated lamp life. Excessive operation of lamps beyond the rated life could cause them to break on rare occasions. 9. Never replace the lamp assembly or any electronic components unless the projector is unplugged.
Safety Instructions (Continued) 13. Do not place this projector in any of the following environments. 14. Do not block the ventilation holes. - Do not place this projector on a blanket, bedding or any other soft surface. - Do not cover this projector with a cloth or any other item. - Do not place inflammables near the projector. - Space that is poorly ventilated or confined. Allow at least 50 cm clearance from walls and free flow of air around the projector.
Safety Instructions (Continued) 17. Do not step on the projector or place any objects upon it. Besides probable physical damage to the projector, doing so may result in accidents and possible injury. 18. Do not place liquids near or on the projector. Liquids spilled into the projector may cause it to fail. If the projector does become wet, disconnect it from the power supply's power outlet and call BenQ to have the projector serviced. 19.
Introduction Projector features The projector offers the following features • Full HD compatible The projector is compatible with Standard Definition TV (SDTV) 480i, 480p, 576i, 576p and High Definition TV (HDTV) 720p, 1080i and 1080p formats, with the 1080p format providing a true 1:1 image reproduction. • SmartEco™ starts your dynamic power saving The SmartEco™ technology offers a new way of operating the projector lamp system and saves lamp power depending on the content brightness level.
Shipping contents Carefully unpack and verify that you have all of the items shown below. If any of these items are missing, please contact your place of purchase. Standard accessories The supplied accessories will be suitable for your region, and may differ from those illustrated. *The warranty card is only supplied in some specific regions. Please consult your dealer for detailed information.
Projector exterior view 1. Front/upper side 1 6 2 3 7 4 8 9 5 10 Rear/lower side 11 12 13 16. 14 15 16 17 18 19 20 21 22 23 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 17. 18. 19. 20. 21. 22. 23. External control panel (See "Controls and functions" on page 10 for details.
Controls and functions Projector 1 2 9 10 11 12 13 14 3 4 5 6 7 8 1. 2. 3. 4. 5. 15 13 11. Focus ring Adjusts the focus of the projected image. Zoom ring Adjusts the size of the image. 12. Top IR remote sensor MENU/EXIT Turns on the On-Screen Display (OSD) menu. Goes back to previous OSD menu, 13. exits and saves menu settings. POWER Toggles the projector between standby mode and on. 14. LAMP indicator light Indicates the status of the lamp.
Remote control 1 2 3 4 5 6 7 8 9 10 11 7 15 16 17 18 18 19 20 12 13 14 1. 2. 3. 4. 5. 6. 7. 8. 9. 21 22 23 10. Page Up/Page Down Operate your display software program (on a connected PC) which responds to page up/ down commands (like Microsoft PowerPoint). 11. Digital Zoom (+, -) Magnifies or reduces the projected picture size. 12. Timer On Activates or displays an on-screen timer based on your own timer setting. 13. Timer Set up Enters presentation timer setting directly. 14.
Remote control effective range The remote control must be held at an angle within 30 degrees perpendicular to the projector's IR remote control sensor(s) to function correctly. The distance between the remote control and the sensor(s) should not exceed 8 meters (~ 26 feet). Make sure that there are no obstacles between the remote control and the IR sensor(s) on the projector that might obstruct the infra-red beam. • Operating the projector from the front • Ap pro x.
Positioning your projector Choosing a location Your projector is designed to be installed in one of four possible installation locations: 1. Front Table Select this location with the projector placed on the table in front of the screen. This is the most common way to position the projector for quick setup and portability. 3. Rear Ceiling Select this location with the projector suspended upside-down from the ceiling behind the screen.
Obtaining a preferred projected image size The distance from the projector lens to the screen, the zoom setting, and the video format each factors in the projected image size.
Installation for a 4:3 ratio screen The illustrations and table below are provided for those users who already have 4:3 aspect ratio screens or intend to purchase 4:3 aspect ratio screens to view 16:9 ratio projected images.
Connection When connecting a signal source to the projector, be sure to: 1. 2. 3. Turn all equipment off before making any connections. Use the correct signal cables for each source. Ensure the cables are firmly inserted. • In the connections shown below, some cables may not be included with the projector (see "Shipping contents" on page 8). They are commercially available from electronics stores. • The connection illustrations below are for reference only.
• If you wish to use this connection method when the projector is in standby mode, make sure the Monitor Out function is turned on in the SYSTEM SETUP: Advanced menu. See "Standby Settings" on page 45 for details. Connecting video source devices You need only connect the projector to a video source device using just one of the connecting methods, however each provides a different level of video quality.
Operation Starting up the projector 1. Plug the power cord into the projector and into a power outlet. Turn on the power outlet switch (where fitted). Check that the POWER indicator light on the projector lights orange after power has been applied. Please use the original accessories (e.g. power cord) only with the device to avoid possible dangers such as electric shock and fire. 2. Press POWER to start the projector. As soon as the lamp lights up, a "Power On Ring Tone" will be heard.
Adjusting the projected image Adjusting the projection angle The projector is equipped with 1 quick-release adjuster foot and 1 rear adjuster foot. These adjusters change the image height and projection angle. To adjust the projector: 1. Press the quick-release button and lift the front of the projector. Once the image is positioned where you want it, release the quick-release button to lock the foot in position. 2. Screw the rear adjuster foot to fine-tune the horizontal angle.
Correcting keystone Keystoning refers to the situation where the projected image is noticeably wider at either the top or bottom. It occurs when the projector is not perpendicular to the screen. To correct this, you will need to manually correct it following ONE of these steps. • Press / on the projector or remote control to display the Keystone correction page. Press to correct keystoning at the top of the image. Press to correct keystoning at the bottom of the image. Press / . Press / .
Using the menus The projector is equipped with On-Screen Display (OSD) menus for making various adjustments and settings. The OSD screenshots below are for reference only, and may differ from the actual design. Below is the overview of the OSD menu. Main menu icon Main menu DISPLAY Off Wall Color Auto Aspect Ratio Keystone Position Sub-menu Status ENTER Phase 0 H.
Securing the projector Using a security cable lock The projector has to be installed in a safe place to prevent theft. Otherwise, purchase a lock, such as the Kensington lock, to secure the projector. You can locate a Kensington lock slot on the rear side of the projector. See item 23 on page 9 for details. A Kensington security cable lock is usually a combination of key(s) and the lock. Refer to the lock’s documentation for finding out how to use it.
If you forget the password If the password function is activated, you will be asked to enter the six-digit password every time you turn on Password Error the projector. If you enter the wrong password, the Please try again. password error message as pictured to the right appears lasting for 3 seconds, and the INPUT PASSWORD message follows.
Disabling the password function To disable password protection, go back to the SYSTEM SETUP: Advanced > Security Settings > Change Security Settings menu after opening the OSD menu system. Press MODE/ENTER. The message “INPUT PASSWORD” appears. Enter the current password. i. If the password is correct, the OSD menu returns to the Security Settings page. Press to highlight Power On Lock and press / to select Off. You will not have to enter the password next time when turning on the projector. ii.
Changing Color Space In the unlikely event that you connect the projector to a DVD player via the projector’s HDMI input and the projected picture displays wrong colors, please change the color space to YUV. To do this: 1. 2. Press MENU/EXIT and then press / until the SOURCE menu is highlighted. Press to highlight Color Space Conversion and press / to select a suitable color space. This function is only available when the HDMI-input port is in use.
2. Press Aspect repeatedly to select an aspect ratio to suit the format of the video signal and your display requirements. • Using the OSD menu 1. Press MENU/EXIT and then press / until the DISPLAY menu is highlighted. 2. Press to highlight Aspect Ratio. 3. Press / to select an aspect ratio to suit the format of the video signal and your display requirements. About the aspect ratio • In the pictures below, the black portions are inactive areas and the white portions are active areas.
Optimizing the image Using Wall Color In the situation where you are projecting onto a colored surface such as a painted wall which may not be white, the Wall Color feature can help correct the projected picture’s colors to prevent possible color difference between the source and projected pictures. To use this function, go to the DISPLAY > Wall Color menu and press / to select a color which is closest to the color of the projection surface.
6. Press to select a menu item to be changed and adjust the value with "Fine-tuning the image quality in user modes" below for details. / . See Fine-tuning the image quality in user modes According to the detected signal type and selected picture mode, some of the below functions may not be available. Based on your needs, you can make adjustments to these functions by highlighting them and pressing / on the projector or remote control. Adjusting Brightness The higher the value, the brighter the image.
Setting a preferred color temperature To set a preferred color temperature: 1. 2. 3. 4. Highlight Color Temperature and select Warm, Normal or Cool by pressing / on the projector or remote control. Press to highlight Color Temperature Fine Tuning and press MODE/ ENTER. The Color Temperature Fine Tuning page appears. Press / to highlight the item you want to change and adjust the values by pressing / . • R Gain/G Gain/B Gain: Adjusts the contrast levels of Red, Green, and Blue.
Please refer 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 pure red in the projected picture will be selected. Increasing its range will include red close to yellow and red close to magenta. 5. RED Magenta Press to highlight Saturation and adjust its values to your preference by pressing / . Every adjustment made will reflect to the image immediately.
4. Press to highlight Timer Position and set the timer position by pressing Top-Left 5. 7. 8. Top-Right . Bottom-Right Press to highlight Timer Counting Direction and select your desired counting direction by pressing / . Selection Count Up Count Down 6. Bottom-Left / Description Increases from 0 to the preset time. Decreases from the preset time to 0. Press to highlight Sound Reminder and decide if you want to activate sound reminder by pressing / .
Hiding the image In order to draw the audience's full attention to the presenter, you can use ECO BLANK on the projector or remote control to hide the screen image. When this function is activated with an audio input connected, the audio can still be heard. You can set the blank time in the SYSTEM SETUP: Basic > Operation Settings > Blank Timer menu to let the projector return the image automatically after a period of time when there is no action taken on the blank screen.
symptoms. However, this is not to state that this projector can operate under any and all harsh or extreme conditions. Adjusting the sound The sound adjustments made as below will have an effect on the projector speaker(s). Be sure you have made a correct connection to the projector audio input. See "Connection" on page 16 for how the audio input is connected. Muting the sound To temporarily turn off the sound: 1. 2. 3.
Using the teaching templates The projector provides several preset patterns for various teaching purposes. To activate the pattern: 1. 2. Open the OSD menu and go to the DISPLAY > Teaching Template and press / to select Blackboard or Whiteboard. Press / to choose the pattern you need. 3. Press MODE/ENTER to activate the pattern.
Shutting down the projector 1. Press POWER and a confirmation message will display prompting you. If you don't respond in a few seconds, the message will disappear. 2. Press POWER a second time. The POWER indicator light flashes orange, the projection lamp shuts down, and the fans will continue to run for approximately 90 seconds to cool down the projector. To protect the lamp, the projector will not respond to any commands during the cooling process.
Menu operation Menu system Please note that the on-screen display (OSD) menus vary according to the signal type selected and the projector model you are using. Main menu Sub-menu Options Off/Light Yellow/Pink/Light Green/Blue/ Blackboard Auto/Real/4:3/16:9/16:10 Wall Color Aspect Ratio Keystone Position Phase H. Size Digital Zoom 1. DISPLAY 2. PICTURE 3.
Main menu Sub-menu Options Timer Period Timer Display Presentation Timer Timer Position 1~240 minutes Always/3 min/2 min/1 min/Never Top-Left/Bottom-Left/Top-Right/ Bottom-Right Timer Counting Count Down/Count Up Direction Sound Reminder On/Off On/Off Language 4.
Main menu Sub-menu Options High Altitude Mode On/Off Mute On/Off Volume Audio Settings Power On/Off On/Off Ring Tone Lamp Mode Normal/Economic/SmartEco Lamp Settings Reset Lamp Timer Equivalent Lamp Change Password 5.
Description of each menu Function Description Wall Color Corrects the projected picture’s color when the projection surface is not white. See "Using Wall Color" on page 27 for details. There are several options to set the image's aspect ratio depending on your input signal source. See "Selecting the aspect ratio" on page 25 for details. Corrects any keystoning of the image. See "Correcting keystone" on page 20 for details. Displays the position adjustment page.
Function Description This projector features a 3D function which enables you to enjoy the 3D movies, videos, and sporting events in a more realistic way by presenting the depth of the images. You need to wear a pair of 3D glasses to view the 3D images. 1. DISPLAY menu 3D Mode The default setting is Auto and the projector automatically chooses an appropriate 3D format when detecting 3D contents. If the projector cannot recognize the 3D format, press / to choose a 3D mode.
Function Picture Mode Reference Mode Brightness Contrast 2. PICTURE menu Color Tint Sharpness Description Pre-defined picture modes are provided so you can optimize your projector image set-up to suit your program type. See "Selecting a picture mode" on page 27 for details. Selects a picture mode that best suits your need for the image quality and further fine-tune the image based on the selections listed on the same page below. See "Setting the User 1/User 2 mode" on page 27 for details.
Function 3. SOURCE menu 4. SYSTEM SETUP: Basic menu 42 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 finish the presentation within a certain time frame. See "Setting the presentation timer" on page 30 for details. Language Sets the language for the On-Screen Display (OSD) menus. See "Using the menus" on page 21 for details.
Function Description Direct Power On Allows the projector to turn on automatically once the power is fed through the power cord. Signal Power On Sets whether to turn the projector directly on without pressing POWER or ON when the projector is in standby mode and the signal is feed through the VGA cable. Auto Power Off Allows the projector to turn off automatically if no input signal is detected after a set period of time. See "Setting Auto Power Off" on page 47 for details. 4.
Function High Altitude Mode A mode for operation in high altitude areas. See "Operating in a high altitude environment" on page 32 for details. Audio Settings See "Adjusting the sound" on page 33 for details. 5. SYSTEM SETUP: Advanced menu Lamp Mode See "Setting the Lamp Mode" on page 47 for details. Lamp Settings Reset Lamp Timer See "Resetting the lamp timer" on page 50 for details. Equivalent Lamp See "Getting to know the lamp hour" on page 47 for details on how the total lamp hour is calculated.
Function 5. SYSTEM SETUP: Advanced menu Standby Settings Description Monitor Out Selecting On enables the function. The projector can output a VGA signal when it is in standby mode and the COMPUTER 1 jack is correctly connected to devices. See "Connection" on page 16 for how to make the connection. Audio Pass Through The projector can play sound when it is in standby mode and the corresponding jacks are correctly connected to devices. Press / to choose the source that you wish to use.
Maintenance Care of the projector Your projector needs little maintenance. The only thing you need to do on a regular basis is to keep the lens and case clean. Never remove any parts of the projector except the lamp. Contact your dealer if other parts need replacing. Cleaning the lens Clean the lens whenever you notice dirt or dust on the surface. Please be sure to turn off the projector and let it cool down completely before cleaning the lens. • • • Use a canister of compressed air to remove dust.
Lamp information Getting to know the lamp hour When the projector is in operation, the duration (in hours) of lamp usage is automatically calculated by the built-in timer. Total (equivalent) lamp hour = 1.63 x (hours used in Normal mode) + 1.30 x (hours used in Economic mode) + 1.00 x (hours used in SmartEco mode) To obtain the lamp hour information: 1. Press MENU/EXIT and then press / to highlight the SYSTEM SETUP: Advanced menu. 2. Press to highlight Lamp Settings and press MODE/ENTER.
Timing of replacing the lamp When the Lamp indicator lights up red or a message appears suggesting it is time to replace the lamp, please install a new lamp or consult your dealer. An old lamp may cause a malfunction in the projector and in some instances the lamp may explode. Go to http://lamp.benq.com for a replacement lamp. The LAMP indicator light and TEMPerature warning light will light up if the lamp becomes too hot. Turn the power off and let the projector cool for 45 minutes.
Replacing the lamp • To reduce the risk of electrical shock, always turn the projector off and disconnect the power cord before changing the lamp. • To reduce the risk of severe burns, allow the projector to cool for at least 45 minutes before replacing the lamp. • To reduce the risk of injuries to fingers and damage to internal components, use caution when removing lamp glass that has shattered into sharp pieces.
6. Use the handle to slowly pull the lamp out of the projector. • Pulling it too quickly may cause the lamp to break and scatter broken glass in the projector. • Do not place the lamp in locations where water might splash on it, children can reach it, or near flammable materials. • Do not insert your hands into the projector after the lamp is removed. If you touch the optical components inside, it could cause color unevenness and distortion of the projected images. 7.
The Lamp Settings page appears. Highlight Reset Lamp Timer. A warning message appears asking if you want to reset the lamp timer. Highlight Reset and press MODE/ENTER. The lamp time will be reset to “0”. Do not reset if the lamp is not new or replaced as this could cause damage.
Indicators Light Status & Description Power events Orange Green Flashing Green Orange Flashing Red Green Red Flashing Off Off Stand-by mode. Off Off Powering up. Off Off Normal operation.
Troubleshooting The projector does not turn on. Cause Remedy Plug the power cord into the AC power jack on the projector, and plug the power cord into the There is no power from the power cord. power outlet. If the power outlet has a switch, make sure that it is switched on. Attempting to turn the projector on again Wait until the cooling down process has during the cooling process. completed. No picture Cause Remedy The video source is not turned on or connected correctly.
Specifications Projector specifications All specifications are subject to change without notice. Optical Control 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 RS-232 serial control 9 pin x 1 IR receiver x 2 Electrical Power supply AC100–240V, 3.1 A, 50–60 Hz (Automatic) Power consumption 315 W (Max); < 0.5 W (Standby) Mechanical Weight 2.8 Kg (6.
Dimensions 311.81 mm (W) x 104.7 mm (H) x 244.12 mm (D) 311.81 244.12 104.7 Unit: mm Ceiling mount installation 80 115 127.7 Ceiling Mount screw: M4 (Max L = 25 mm; Min L = 20 mm) 25 537.9 582.2 626.11 137 160 95.21 168.59 111.28 311.58 239.
Timing chart Supported timing for PC input Resolution Mode VGA_60* VGA_72 640 x 480 VGA_75 VGA_85 720 x 400 720 x 400_70 SVGA_60* SVGA_72 SVGA_75 800 x 600 SVGA_85 SVGA_120** (Reduce Blanking) XGA_60* XGA_70 XGA_75 1024 x 768 XGA_85 XGA_120** (Reduce Blanking) 1152 x 864 1152 x 864_75 BenQ 1024 x 576 Notebook_timing BenQ 1024 x 600 Notebook_timing 1280 x 720 1280 x 720_60* 1280 x 768 1280 x 768_60* WXGA_60* WXGA_75 1280 x 800 WXGA_85 WXGA_120** (Reduce Blanking) SXGA_60*** 1280 x 1024 SXGA_75 SXGA_85 1280
• The timings showing above may not be supported due to EDID file and VGA graphic card limitations. It is possible that some timings cannot be chosen.
• The timings showing above may not be supported due to EDID file and VGA graphic card limitations. It is possible that some timings cannot be chosen.
Supported timing for Video and S-Video inputs Video mode Horizontal Frequency (kHz) Vertical Frequency (Hz) Color sub-carrier Frequency (MHz) NTSC* PAL SECAM PAL-M PAL-N PAL-60 NTSC4.43 15.73 15.63 15.63 15.73 15.63 15.73 15.73 60 50 50 60 50 60 60 3.58 4.43 4.25 or 4.41 3.58 3.58 4.43 4.43 *Supported timing for 3D signal in Frame Sequential format.
Warranty and Copyright information Limited warranty BenQ warrants this product against any defects in material and workmanship, under normal usage and storage. Proof of purchase date will be required with any warranty claim. In the event this product is found to be defective within the warranty period, BenQ's only obligation and your exclusive remedy shall be replacement of any defective parts (labor included).
