BenQ TH681+ User Manual

TH681/TH681+Digital ProjectorUser Manual

Introduction10Controls and functionsProjector1. Focus ringAdjusts the focus of the projected image.2. Zoom ringAdjusts the size of the image.3. Top IR

Introduction 11Remote control1. POWERToggles the projector between standby mode and on.2. InfoShows the status information of the projector.3. MENU/E

Introduction12Remote control effective rangeThe remote control must be held at an angle within 30 degrees perpendicular to the projector's IR rem

Positioning your projector 13Positioning your projectorChoosing a locationYour projector is designed to be installed in one of four possible installat

Positioning your projector14Obtaining a preferred projected image sizeThe distance from the projector lens to the screen, the zoom setting, and the vi

Positioning your projector 15Installation for a 4:3 ratio screenThe illustrations and table below are provided for those users who already have 4:3 as

Connection16ConnectionWhen connecting a signal source to the projector, be sure to:1. Turn all equipment off before making any connections.2. Use the

Connection 17• 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 th

Operation18OperationStarting up the projector1. Plug the power cord into the projector and into a power outlet. Turn on the power outlet switch (where

Operation 19Adjusting the projected imageAdjusting the projection angleThe projector is equipped with 1 quick-release adjuster foot and 1 rear adjuste

Table of contents2Ta b l e o f c o nte n t sImportant safety instructions ... 3Introduction... 7Proje

Operation20Correcting keystoneKeystoning refers to the situation where the projected image is noticeably wider at either the top or bottom. It occurs

Operation 21Using the menusThe projector is equipped with On-Screen Display (OSD) menus for making various adjustments and settings.The OSD screenshot

Operation22Securing the projectorUsing a security cable lockThe projector has to be installed in a safe place to prevent theft. Otherwise, purchase a

Operation 23If you forget the passwordIf the password function is activated, you will be asked to enter the six-digit password every time you turn on

Operation24Disabling the password functionTo disable password protection, go back to the SYSTEM SETUP: Advanced > Security Settings > Change Sec

Operation 25Changing Color SpaceIn the unlikely event that you connect the projector to a DVD player via the projector’s HDMI input and the projected

Operation262. Press Aspect repeatedly to select an aspect ratio to suit the format of the video signal and your display requirements.• Using the OSD

Operation 27Optimizing the imageUsing Wall ColorIn the situation where you are projecting onto a colored surface such as a painted wall which may not

Operation286. Press to select a menu item to be changed and adjust the value with / . See "Fine-tuning the image quality in user modes" b

Operation 29Setting a preferred color temperatureTo set a preferred color temperature:1. Highlight Color Temperature and select Warm, Normal or Cool b

Important safety instructions 3Important safety instructionsYour projector is designed and tested to meet the latest standards for safety of informati

Operation30Please 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

Operation 314. Press to highlight Timer Position and set the timer position by pressing /.5. Press to highlight Timer Counting Direction and selec

Operation32Hiding the imageIn order to draw the audience's full attention to the presenter, you can use ECO BLANK on the projector or remote cont

Operation 33symptoms. However, this is not to state that this projector can operate under any and all harsh or extreme conditions.Adjusting the soundT

Operation34Using the teaching templatesThe projector provides several preset patterns for various teaching purposes. To activate the pattern:1. Open t

Operation 35Shutting down the projector1. Press POWER and a confirmation message will display prompting you. If you don't respond in a few secon

Operation36Menu operationMenu systemPlease note that the on-screen display (OSD) menus vary according to the signal type selected and the projector mo

Operation 37Main menu Sub-menu Options4. SYSTEM SETUP: BasicPresentation TimerTimer Period 1~240 minutesTimer Display Always/3 min/2 min/1 min/NeverTi

Operation38Note that the menu items are available when the projector detects at least one valid signal. If there is no equipment connected to the proj

Operation 39Description of each menuFunction DescriptionWall ColorCorrects the projected picture’s color when the projection surface is not white. See

Important safety instructions4 Safety Instructions (Continued)7. The lamp becomes extremely hot during operation. Allow the projector to cool for app

Operation40Function Description3DThis projector features a 3D function which enables you to enjoy the 3D movies, videos, and sporting events in a more

Operation 41Function DescriptionPicture ModePre-defined picture modes are provided so you can optimize your projector image set-up to suit your progra

Operation42Function DescriptionQuick Auto SearchSee "Switching input signal" on page 24 for details.Color Space ConversionSee "Changing

Operation 43Function DescriptionOperation SettingsDirect Power OnAllows the projector to turn on automatically once the power is fed through the power

Operation44Function DescriptionHigh Altitude ModeA mode for operation in high altitude areas. See "Operating in a high altitude environment"

Operation 45 Function DescriptionStandby SettingsMonitor OutSelecting On enables the function. The projector can output a VGA signal when it is in sta

Maintenance46MaintenanceCare of the projectorYour projector needs little maintenance. The only thing you need to do on a regular basis is to keep the

Maintenance 47Lamp informationGetting to know the lamp hourWhen the projector is in operation, the duration (in hours) of lamp usage is automatically

Maintenance48Timing of replacing the lampWhen the Lamp indicator lights up red or a message appears suggesting it is time to replace the lamp, please

Maintenance 49Replacing the lamp• To reduce the risk of electrical shock, always turn the projector off and disconnect the power cord before changing

Important safety instructions 5 Safety Instructions (Continued)13. Do not place this projector in any of the following environments.- Space that is

Maintenance5012. Connect the power and restart the projector.Do not turn the power on with the lamp cover removed. Resetting the lamp timer13. After t

Maintenance 51The Lamp Settings page appears. Highlight Reset Lamp Timer. A warning message appears asking if you want to reset the lamp timer. Highli

Maintenance52IndicatorsLight Status & DescriptionPower eventsOrange Off OffStand-by mode.GreenFlashingOff OffPowering up.Green Off OffNormal opera

Troubleshooting 53TroubleshootingThe projector does not turn on.No pictureBlurred imageRemote control does not workThe password is incorrectCause Reme

Specifications54SpecificationsProjector specificationsAll specifications are subject to change without notice.OpticalResolution1920 (H) x 1080 (V)Disp

Specifications 55Dimensions311.81 mm (W) x 104.7 mm (H) x 244.12 mm (D)Ceiling mount installation311.81244.12104.7Unit: mm626.11582.2537.92595.21168.5

Specifications56Timing chartSupported timing for PC input• *Supported timing for 3D signal in Frame Sequential, Top Bottom and Side by Side formats.*

Specifications 57• The timings showing above may not be supported due to EDID file and VGA graphic card limitations. It is possible that some timings

Specifications58• The timings showing above may not be supported due to EDID file and VGA graphic card limitations. It is possible that some timings

Specifications 59Supported timing for Video and S-Video inputs*Supported timing for 3D signal in Frame Sequential format.Video modeHorizontal Frequenc

Important safety instructions6Safety Instructions (Continued)17. Do not step on the projector or place any objects upon it. Besides probable physical

Warranty and Copyright information60Warranty and Copyright informationLimited warrantyBenQ warrants this product against any defects in material and w

Introduction 7IntroductionProjector featuresThe projector offers the following features• Full HD compatibleThe projector is compatible with Standard

Introduction8Shipping contentsCarefully unpack and verify that you have all of the items shown below. If any of these items are missing, please contac

Introduction 9Projector exterior view1. External control panel(See "Controls and functions" on page 10 for details.)2. Lamp cover3. Vent (he