BenQ PB8240, PB8250 user manual Maintenance, Cleaning the lens, Cleaning the projector case

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Maintenance

Your projector needs little maintenance. Things you have to do on a regular basis are keep the lens clean and clean the air filter to prevent overheating.

Never remove any parts of the projector except the lamp and air filter. Contact your dealer if other parts needs replacing.

Cleaning the lens

Clean the lens whenever you notice dirt or dust on the surface.

Use a canister of compressed air to remove dust.

If there is dirt or smears, use lens-cleaning paper or moisten a soft cloth with lens cleaner to gently wipe the lens surface.

Never rub the lens with abrasive materials.

Cleaning the projector case

Before you clean the case, turn the projector off and unplug the power cord.

To remove dirt or dust, wipe the case with a soft, dry, lint-free cloth.

To remove stubborn dirt or stains, moisten a soft cloth with water and a neutral detergent. Then wipe the case.

Never use wax, alcohol, benzene, thinner or other chemical detergents. These can damage the case.

Cleaning and replacing the air filters

It is necesssary to clean the air filters periodically. If the filters are not cleaned, they can become clogged with dust and prevent proper ventilation. This can cause overheating and a malfunction of the projector.

A warning message like the one pictured to the right will be displayed for 10 seconds every 300 hours to remind you to clean the filters.

1.Turn the project off and wait until the fans stop running.

2.Disconnect the projector from any cables.

3.Open one air filter cover from the left and draw another one from the front sides of the projector.

From the front side:

From the left side:

36 Maintenance

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Contents Welcome Copyright DisclaimerTable of Contents Iv Table of Contents PIP Picture In Picture MenuOrdering Parts or Getting Information Table of Contents Supported timing for PC including DVI-I inputVi Table of Contents Important Safety Instructions Important Safety InstructionsSafety Instructions 10000 Safety Instructions Projector Features IntroductionIntroduction Shipping Contents Front / Upper View Optional AccessoriesProjector Exterior View Back ViewConnector Panel PC/ YPbPr/ YCbCrControls and Functions External Control PanelRemote Control Description Front ViewRemote Control Effective Range Installing or Replacing the Batteries Push and open Install batteries asMaking Connections Setting Up Your ProjectorChoosing a Location IV. Ceiling rearAudio cable Connecting to a Laptop or Desktop ComputerConnecting Equipment to the Component Video Input Component Video cableVideo devices Video cable Connecting to Video or S-Video DevicesConnecting to Display Devices Video devices or VCRAdjusting the Height Focus ring Zoom ring Setting Up Your ProjectorScreen Size Screen size chart 43 aspect ratio Screen size chart 169 aspect ratioOperation Start UpOperation Shutdown Digital Keystone Correction For exampleAuto Adjustment Source SelectionZoom / Focusing BlankLaser Pointer Operation Zoom In + / Zoom Out Volume AdjustmentMouse Function Operation PIP Picture In Picture OperationPreset Mode Selection FreezeMenu Operation Menu SystemUsing the menus Display Menu As above ColorTint Increases or decreases the color intensity of the imagePosition Image MenuAuto Resize Color TempRatio SystemSharpness Mirror VolumeSource Menu TrebleAdjusts the bass level. -5 ~ BassMute Setup Control MenuLanguage Preset Mode ResetPIP Size PIP Picture In Picture MenuPIP Source PIP PositionCleaning the projector case MaintenanceCleaning the lens Cleaning and replacing the air filtersStoring the projector Transporting the projectorUse and Replacement of the Lamp Lamp ReplacementLamp Information Maintenance Indicators Temp Warning LightLED Please contact your dealer for assistanceDealer for assistance Optional Accessories not included in the standard package Service InformationAccessories included in the standard package Ordering Parts or Getting InformationPlug the power cord into the AC inlet on TroubleshootingCommon Problems & Solutions Make sure that it is switched onSpecifications Projector SpecificationsTechnical Specifications Environmental Requirements RS-232C PinSupported timing for YPbPr input Timing ChartSupported timing for PC including DVI-I input Supported timing for Video and S-Video inputsDimensions Unit mm DimensionsWarranty Limited WarrantyWarranty EEC Statement Regulation StatementsFCC Statement MIC Statement