8. Appendix

￿Troubleshooting Check List

Before contacting your dealer or service personnel, check the following list to be sure repairs are needed also by referring to the “Troubleshooting” section in your user’s manual. This checklist below will help us solve your problem more efficiently.

* Print the following pages.

Frequency of occurrence ☐ always ☐ sometimes (How often?_____________________) ☐ other (__________________)

Power

No power (POWER indicator does not light green) See also “Sta- tus Indicator (STATUS)”.

Power cable's plug is fully inserted into the wall outlet.

Main power switch is pressed to the ON position.

Lamp cover is installed correctly .

Lamp Hour Meter (lamp operation hours) was cleared after lamp replacement.

No power even though you press and hold the POWER button for a minimum of 2 seconds.

Shut down during operation.

Power cable's plug is fully inserted into the wall outlet.

Lamp cover is installed correctly .

Power Management is turned off (only models with the Power Management function).

Sleep Timer is turned off (only models with the Sleep Timer function ).

Video and Audio

No image is displayed from your PC or video equipment to the projector.

Still no image even though you connect the projector to the PC first, then start the PC.

Enabling your notebook PC’s signal output to the projector.

•A combination of function keys will enable/disable the ex- ternal display. Usually, the combination of the “Fn” key along with one of the 12 function keys turns the external display on or off.

No image (blue background, logo, no display).

Still no image even though you press the AUTO ADJUST but- ton.

Still no image even though you carry out “Reset” in the projector’s menu.

Signal cable's plug is fully inserted into the input connector

A message appears on the screen.

( _____________________________________________ )

The source connected to the projector is active and available.

Still no image even though you adjust the brightness and/or the contrast.

Input source's resolution and frequency are supported by the projector.

Image is too dark.

Remains unchanged even though you adjust the brightness and/or the contrast.

Image is distorted.

Image appears to be trapezoidal (unchanged even though you carry out the “Keystone" or “3D Reform” adjustment).

Parts of the image are lost.

Still unchanged even though you press the AUTO ADJUST but- ton.

Still unchanged even though you carry out “Reset” in the projector’s menu.

Image is shifted in the vertical or horizontal direction.

Horizontal and vertical positions are correctly adjusted on a computer signal.

Input source's resolution and frequency are supported by the projector.

Some pixels are lost.

Image is flickering.

Still unchanged even though you press the AUTO ADJUST but- ton.

Still unchanged even though you carry out “Reset” in the projector’s menu.

Image shows flickering or color drift on a computer signal.

Image appears blurry or out of focus.

Still unchanged even though you checked the signal’s resolu- tion on PC and changed it to projector’s native resolution.

Still unchanged even though you adjusted the focus.

No sound.

Audio cable is correctly connected to the audio input of the projector.

Still unchanged even though you adjusted the volume level.

AUDIO OUT is connected to your audio equipment (only mod- els with the AUDIO OUT connector).

Other

Remote control does not work.

No obstacles between the sensor of the projector and the re- mote control.

Projector is placed near a fluorescent light that can disturb the infrared remote controls.

One or more remote sensors are enabled (only models with the Remote Sensor Selection function).

Batteries are new and are not reversed in installation.

If present on the remote control, projector selector switch is not used.

Buttons on the projector cabinet do not work ( only models with the Key Lock function).

Cabinet Button Lock is not turned on or is disabled in the menu.

Still unchanged even though you press and hold the EXIT but- ton for a minimum of 10 seconds.

133

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NEC LT265, LT245 manual Troubleshooting Check List, 133, Power, Video and Audio, Other
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LT245, LT265 specifications

The NEC LT265 and LT245 are two high-performance projectors that cater to business professionals, educators, and multimedia enthusiasts alike. Both models are part of NEC's range of advanced projection solutions, known for delivering superior quality and reliability.

The NEC LT265 is recognized for its impressive brightness of up to 3500 lumens, making it suitable for various lighting conditions, from dimly lit conference rooms to brightly illuminated classrooms. This model uses DLP technology, which enhances image quality through its ability to produce sharper and more vibrant colors. The LT265 features a native XGA resolution of 1024 x 768 pixels, ensuring that fine details in text and images are rendered with clarity.

One of the standout features of the LT265 is its extensive connectivity options. It includes analog and digital inputs, such as VGA, HDMI, and USB, making it compatible with a wide array of devices, including laptops, tablets, and desktop computers. Additionally, the projector offers a built-in 10-watt speaker, which provides sufficient audio output for presentations and video playback without the need for external speakers.

On the other hand, the NEC LT245 is designed for even broader versatility. It boasts a slightly lower brightness at 3000 lumens but maintains a similar XGA resolution. The LT245 excels in its lightweight and portable design, weighing just around 5.5 pounds, making it an excellent choice for professionals on the go. The projector's lamp life is rated at an impressive 4000 hours in standard mode and up to 6000 hours in eco mode, allowing for extended use and reduced maintenance costs.

Both projectors incorporate technologies like keystone correction and digital zoom, facilitating easy setup and adjustment of the projected image. Keystone correction allows users to eliminate distortion when projecting at an angle, ensuring a properly shaped image every time. The LT265 and LT245 also come equipped with a quick-start feature, enabling fast power-up times, which is crucial for time-sensitive presentations.

In conclusion, the NEC LT265 and LT245 stand out for their high-quality projection capabilities, reliability, and user-friendly features. Whether for corporate presentations or educational purposes, these projectors provide exceptional performance that meets the varied needs of today's dynamic environments. Their combination of portability, connectivity, and enhanced imaging technologies positions them as top choices in the competitive projector market.
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