InFocus LP 740 Maintenance & Troubleshooting, Cleaning the Lens, Cleaning the Fan Intake Filter

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MAINTENANCE & TROUBLESHOOTING

This section describes how to:

•clean the lens

•clean the fan filter

•replace the projection lamp

•troubleshoot the projector

Cleaning the Lens

Follow these steps to clean the projection lens:

1Apply a non-abrasive camera lens cleaner to a soft, dry cloth.

•Avoid using an excessive amount of cleaner.

•Abrasive cleaners, solvents or other harsh chemicals might scratch the lens.

2Lightly wipe the cleaning cloth over the lens.

3If you don’t intend to use the projector immediately, replace the lens cap.

Cleaning the Fan Intake Filter

The fan intake filter on the bottom of the projector catches dust and particles in the air. If the filter becomes clogged, the projector does not cool properly and may malfunction. To prevent this, clean the filter after every 100 hours of use.

1Turn off the power and unplug the power cord.

2Remove the filter door (Figure 15).

• Remove the screw on the filter door and lift the door out.

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Contents Table of Contents Appendix IndexSafety Summary Power SourcePower Cord Do Not Look Into The LensGrounding LampLamp Compartment Hot SurfacesImage Resolution IntroductionCompatibility Unpacking the ProjectorT r o d u c t i o n Back view of projector Usage Guidelines WarrantyIf You Need Assistance Setting UP the Projector T t i n g O j e c t o r Connecting a Computer Do you want to play your computer’s audio on the projector?Connecting a Video Player Powering up the Projector and Adjusting the Image Turning Off the Projector Basic Image Adjustment Using the ProjectorAdjusting the Projector I n g O j e c t o r Using the Remote Control and Keypad Buttons KeypadPower VolumeSource Computer, Video, or S-Video on remote MenuRemote Control Only Buttons Auto RestoreBright Zoom + and ZoomUsing the On-Screen Menus Menu MainItems are different for video Computer sources Here is the menu structure Video only adjustments Image controlAudio control Custom setup Submenu FunctionInformation InformationUsers memory Save Users memory LoadCleaning the Lens Maintenance & TroubleshootingCleaning the Fan Intake Filter Replacing the Projection Lamp Removing the lamp door Installing a new lamp module Troubleshooting Problem Nothing on projection screen Problem Color or text not being projectedProblem The screen resolution is not right Problem Image isn’t centered on the screenProblem Image is too wide or narrow for screen Problem Image is out of focus Problem Image and menus are reversed left to rightProblem no sound Problem Image is noisy or streakedProblem Lamp seems to be getting dimmer Problem Lamp shuts offSpecifications AppendixAccessories Optional AccessoriesPortable and Laptop Activation Chart Key command to Computer Activate port De-activate portFN-F6 FN-F4 FN-F1 FN-F2 FN-F1 FN-F7 FN-F5 Using Video Mirroring with a PowerBook Computer Using SimulScanProjected Image Size Distance to Diagonal Width HeightImage Size, Width and Height for lens at Minimum Image Size RS-232 Terminal Specifications Communication configurationSetting Value Command formatSupported commands Function Command Meaning Index D e

LP 740 specifications

The InFocus LP 740 is a highly regarded projector that has made a significant impact in various settings, from educational institutions to corporate environments. Known for its reliability and impressive performance, the LP 740 brings a multitude of features and technologies that cater to the diverse needs of users.

One of the standout features of the InFocus LP 740 is its brightness level. With a remarkable brightness rating of 3,200 ANSI lumens, this projector ensures clear and vibrant images even in well-lit rooms. This makes it an ideal choice for presentations in classrooms or conference halls where ambient light can often compromise image quality.

The LP 740 boasts a native resolution of XGA (1024 x 768 pixels), delivering sharp and detailed images that enhance the overall viewing experience. This native resolution is especially beneficial for displaying text, graphics, and detailed presentations, ensuring that every detail is visible and legible.

In terms of connectivity, the InFocus LP 740 offers a variety of options, including VGA, composite video, and S-Video inputs. This versatility allows users to connect the projector to a wide range of devices, from laptops and desktops to DVD players and other multimedia sources. The inclusion of an audio output also enables users to pair the projector with external speakers for enhanced sound quality.

Another notable technology featured in the LP 740 is its DLP (Digital Light Processing) technology. DLP projectors are known for their superior color accuracy and consistency, providing a more immersive visual experience. The LP 740 delivers vibrant colors and deep blacks, making it well-suited for both business presentations and cinematic displays.

The projector also incorporates advanced cooling technology, which ensures it operates quietly, reducing distractions during presentations. Furthermore, it features a low maintenance design, including a long-lasting lamp life of up to 3,000 hours, which minimizes the need for frequent replacements.

Portability is another key characteristic of the InFocus LP 740. Weighing in at a convenient size, it can be easily transported, making it suitable for individuals who frequently move between different locations for meetings or lectures.

Overall, the InFocus LP 740 combines robust performance with practical features, making it a versatile choice for professionals and educators alike. Its high brightness, advanced DLP technology, and variety of connectivity options make it a reliable solution for a wide array of projection needs. Whether in a boardroom or a classroom, the LP 740 continues to impress with its quality and reliability.