Epson Powerlite 750c Specifications
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Epson PowerLite 750c/760c Projector 8/05 Epson PowerLite 750c/760c Projector - 1 Projector Parts Specifications General Type of display Poly-silicon TFT active matrix Resolution 1024 × 768 pixels (XGA) (native format) Color 24-bit, 16.8 million colors reproduction Brightness (ANSI) PowerLite 750c 2000 lumens (High Brightness mode) 1500 lumens (Low Brightness mode) PowerLite 760c 2500 lumens (High Brightness mode) 2000 lumens (Low Brightness mode) Contrast ratio 400:1 Image size 30 to 300 inches (0.8 to 7.6 meters)Projection 3.2 to 39.7 feet (1.0 to 12.1 meters) distance Projection Front, rear, upside-down (ceiling mount) methods Internal 1 W monaural sound system Optical aspect 4:3 (horizontal:vertical) ratio Zoom ratio 1:1.2 Noise level 35 dB in Low Brightness mode; 40 dB in High Brightness mode Keystone Automatic (manual adjustment capability correction ±30° vertical keystone correction) Mouse Supports USB (type B) compatibility Projection Lamp Type UHE (Ultra High Efficiency) Power 170 W consumption Lamp life High Brightness mode: about 2000 hours Low Brightness mode: about 3000 hours Part number V13H010L32 Remote Control Range 20 feet (6 meters) Batteries (2) Alkaline AAA Dimensions Height 2.7 inches (70 mm), feet retracted Width 10.9 inches (276 mm) Depth 7.6 inches (193 mm) Weight 3.8 lb (1.7 kg) Electrical Rated frequency 50/60 Hz AC Power supply 100 to 120 VAC, 2.7 A 200 to 240 VAC, 1.1 A Power Operating: 240 W consumption Standby: 4 W Environmental Temperature Operating: 41 to 95 °F (5 to 35 °C) Storage: 14 to 140 °F (–10 to 60 °C) Humidity Operating: 20 to 80% RH (non-condensing) Storage: 10 to 90% RH I/R receiverLens cap Exhaust air vent Foot adjust leverSecurity lock Control panel Zoom ringFocus ring SpeakerRear adjustable footPower inlet USB port Audio portComputer/Component Video port Video port S-Video port
Epson PowerLite 750c/760c Projector 2 - Epson PowerLite 750c/760c Projector 8/05 Safety and Approvals United States FCC 47CFR Part15B Class B (DoC) UL60950 Third Edition Canada ICES-003 Class B CSA C22.2 No. 60950 CE Marking Directive 73/23/EEC, 89/336/EEC IEC 60950 Third Edition EN 55022, EN 55024 Pixelworks™ DNX™ ICs are used in this projector. Compatible Video Formats The projector supports the video display formats listed below: Compatible Computer Display Formats To project images from a computer, set the computer’s video card at a refresh rate (vertical frequency) compatible with the projector; see the following table for compatible formats. Some images are automatically resized to display in the projector’s native format (XGA). The frequencies of some computers may not allow images to display correctly; see your computer’s documentation for details. * The image is resized using Epson’s SizeWise™ Technology. Positioning the Projector Before connecting the projector, you need to decide where to place it. The location you choose depends on the size of the room and what you are projecting. ❏Place the projector on a sturdy, level surface, between 3.2 and 39.7 feet from the screen. ❏Make sure there is plenty of space for ventilation around and under the projector. Do not set the projector on top of anything that could block the vents under the projector. ❏Make sure the projector is within 6 feet of an electrical outlet or extension cord and within 5 feet of your computer and/or video source. ❏Place the projector directly in front of the center of the screen, facing the screen squarely. Otherwise, your image will not be rectangular. Note: It’s easier to position the projector when the screen is directly in front of the room. If the screen is placed diagonally in a corner, it’s much more difficult to aim the projector correctly at the screen and get a rectangular image. Mode Refresh rate (Hz) NTSC NTSC 4:43 PAL N—PAL M—PAL PAL—60 SECAM60 60 50 50 60 60 50 HDTV (720p) HDTV (720p) HDTV (1080i) HDTV (1080i) SDTV (480p) SDTV (480p) TV480i TV480i60 50 60 50 60 50 60 50 Mode Refresh rate (Hz) Resolution VGA EGA VGA—60 VESA—72 VESA—75 VESA—8570 60 72 75 85640 × 350* 640 × 480* 640 × 480* 640 × 480* 640 × 480* SVGA—56 SVGA—60 SVGA—72 SVGA—75 SVGA—8556 60 72 75 85800 × 600* 800 × 600* 800 × 600* 800 × 600* 800 × 600* XGA—60 XGA—70 XGA—75 XGA—8560 70 75 851024 × 768 1024 × 768 1024 × 768 1024 × 768 SXGA1—70 SXGA1—75 SXGA1—8570 75 851152 × 864* 1152 × 864* 1152 × 864* SXGA2—60 SXGA2—75 SXGA2—8560 75 851280 × 960* 1280 × 960* 1280 × 960* SXGA3—60 SXGA3—75 SXGA3—8560 75 851280 × 1024* 1280 × 1024* 1280 × 1024* SXGA+60 SXGA+75 SXGA+8560 75 851400 × 1050* 1400 × 1050* 1400 × 1050* UXGA—60 60 1600 × 1200* iMAC VGA iMAC SVGA iMAC XGA MAC13 MAC16 MAC19—60 MAC19 MAC21117 95 75 67 75 59 75 75640 × 480* 800 × 600* 1024 × 768 640 × 480* 832 × 624* 1024 × 768 1024 × 768 1152 × 870* Mode Refresh rate (Hz) Resolution
Epson PowerLite 750c/760c Projector 8/05 Epson PowerLite 750c/760c Projector - 3 Use the figure below as a guideline to help you determine how far from the screen to place the projector. Image size generally increases with distance, but may vary depending on how you position the zoom ring and whether you have adjusted the image size with other settings. To calculate exact measurements, use the following formulas: ❏To find the projection distance when you know the screen’s diagonal dimension: Wide (inches) = ((33.696 × diagonal screen size [inches]) – 21.717) / 25.4 Tele (inches) = ((40.453 × diagonal screen size [inches]) – 22.52) / 25.4 ❏To find how large a screen’s diagonal dimension will be when you know the projection distance: Wide (inches) = (Projection distance [inches] × 0.254 + 0.02171 / 0.033696 Tele (inches) = (Projection distance [inches] × 0.0254 + 0.02252) / 0.040453 If you place the projector below the level of the screen, you’ll have to tilt it up by extending the front adjustable foot, as shown. This causes the image to lose its rectangular shape, but you can correct the distortion by pressing the keystone buttons on the projector. See page 5 for detailed information about correcting the image shape. If you place the projector level with the bottom of the screen, the image will be rectangular and you won’t have to adjust it. If you place the projector higher than the bottom of the screen, the image will still be rectangular, but you won’t be able to fill the whole screen with the image. Starting Up the Projector Make sure your projector and other equipment are set up and connected correctly. Then turn on the projector, as described below. If you turn on your connected computer or video equipment before starting the projector, the projector automatically detects and displays the image source. If you turn on the projector first, or have multiple pieces of connected equipment, you may have to select the image source manually. See “Selecting the Image Source” on page 4. Follow these steps to plug in and turn on the projector: 1. Remove the lens cap. Caution: Do not use the projector with the lens cap in place. The heat generated by the lamp can damage the cap. 2. Connect one end of the power cord to the projector’s power inlet. Then connect the other end to an electrical outlet. The Power light on top of the projector turns orange, indicating that the projector is in standby mode. 3. Press the P Power button on top of the projector or on the remote control. The projector beeps once and the Power light flashes green as the projector warms up, then an image begins to appear. When the Power light stops flashing and remains green, the projector is ready for use. Warning: Never look into the lens when the lamp is on. This can damage your eyes, and is especially dangerous for children. 33.1 to 39.7 feet 6.6 to 7.9 feet 3.2 to 3.9 feet Remote control Projector Power button
Epson PowerLite 750c/760c Projector 4 - Epson PowerLite 750c/760c Projector 8/05 ❏If you’ve connected a Windows ®-based computer to the projector, you may see a New Hardware Wizard saying your computer has found a plug-and-play monitor; if so, click Cancel. ❏If you don’t see the image you want, press the Source Search button on the projector or the Search button on the remote control until you see the image you want to project. ❏If you are prompted to enter a password, see “Starting the Projector with a Password” on page 10. Note: You can also use the Source buttons on the remote control to switch between devices connected to the ports identified on each button. What To Do If You See a Blank Screen If you see a blank screen or the No Signal message after turning on your computer or video source, try the following: ❏Make sure the cables are connected correctly. ❏Make sure the Power light is green and not flashing and the lens cover is off. ❏If you have connected more than one computer and/or video source, you may need to press the Source Search button on the projector or the Search button on the remote control repeatedly until you see the image you want to project. See “Selecting the Image Source” in the next column for more information. If you’re using a Windows computer: ❏Hold down the Fn key and press the function key that lets you display on an external monitor. It may have an icon such as or it may be labelled CRT/LCD. Allow a few seconds for the projector to sync up after pressing it. Check your computer’s manual or online help for details. On most systems, the or CRT/LCD key lets you toggle between the LCD screen and the projector, or display on both at the same time. ❏Depending on your computer’s video card, you might need to use the Display utility in the Control Panel to make sure that both the LCD screen and external monitor port are enabled. See your computer’s documentation or online help for details. If you’re using a Macintosh® with OS X: You may need to set up your system to display on the projector screen as well as the LCD screen. Make sure your computer is connected to the projector, then follow these steps: 1. From the Apple menu, select System Preferences, then click Displays. 2. Select VGA Display or Color LCD, click Arrange or Arrangement, and make sure Mirror Displays is checked. If you’re using a Macintosh with OS 8.6 to 9.x: You may need to set up your system to display on the projector screen as well as the LCD screen. Follow these steps: 1. From the Apple menu, select Control Panels, then click Monitors or Monitors and Sound. 2. Click the Arrange icon. 3. Drag one monitor icon on top of the other. If the Arrange option isn’t available, try selecting one of the Simulscan resolution settings. Click the Monitor icon, if necessary, and then select a Simulscan resolution. (Allow a few seconds for the projector to sync up after making the selection.) Selecting the Image Source If multiple devices are connected to the projector, the easiest way to select the image source is to press the Search button on the remote control or the Source Search button on the projector until the correct image is projected. You can also press one of the following buttons on the remote control: ❏ Computer to select the device connected to the projector’s Computer/Component Video port. ❏ S-Video to select the device connected to the S-Video port. ❏ Video to select the device connected to the Video port. After you select a source, the screen goes dark for a moment before the image appears. Note: The PowerLite 750c/760c does not support the EasyMP button.
Epson PowerLite 750c/760c Projector 8/05 Epson PowerLite 750c/760c Projector - 5 Adjusting the Image Once you see your image, you may need to make certain adjustments, as described in this section. Focusing and Zooming Your Image Rotate the focus ring to sharpen the image. Rotate the zoom ring to reduce or enlarge the image. You can also change the image size by moving the projector closer to or farther away from the screen. You can use the E-Zoom buttons on the remote control to zoom in on a portion of the image. See “Zooming Your Image” on page 7 for instructions. Adjusting the Height of Your Image If the image is too low, you can raise it by extending the projector’s adjustable front foot. 1. Stand behind the projector. Press up on the blue foot release lever and lift the front of the projector to extend the foot. 2. Once the image is positioned where you want it, release the lever to lock the foot in position.3. If the projector isn’t level, rotate the back foot on the back of the projector. If the image is no longer rectangular after raising it, see the next section. Adjusting the Image Shape In most cases, you can maintain a square or rectangular image by placing the projector directly in front of the center of the screen with the base of the lens level with the bottom of the screen. Even if the projector is slightly tilted (within a range of 30° up or down), the projector has an automatic keystone correction function that detects and corrects vertical keystone distortion. It takes about one second after projection starts for the image to be corrected. During this time, a vertical keystone correction gauge appears on the screen. If your image is still distorted, you can correct it using the Keystone buttons on the projector’s control panel or the projector’s Setting menu. Note: If you manually adjust the keystone setting, the image retains the corrected shape unless you move the projector up or down; then the auto keystone function will readjust the image again. The automatic keystone function is disabled if you are projecting in ceiling or rear projection mode. Using Keystone Correction To adjust your image when it is wider on the top or bottom, do the following: ❏Press one of the two triangular buttons on the projector’s control panel, as shown below. Continue pressing the button until you are satisfied with the shape of the image. Focus ring Zoom ring Corrected image Projector tilted up Projector tilted down
Epson PowerLite 750c/760c Projector 6 - Epson PowerLite 750c/760c Projector 8/05 ❏Or press the Menu button, select the Setting menu, and press Enter. From the Setting menu, select Keystone and press Enter. Use the pointer button on the remote control to adjust the keystone setting as needed. The keystone setting is adjustable from –65 to +65. These numbers represent a range of –30° to +30° of angle change; adjustments are made in steps of 0.5°. Note: The image will be slightly smaller after adjusting. Adjusting the Brightness The brightness of an image depends on the source you are projecting and the amount of light in the room. If the image is too bright or not bright enough, do one of the following: ❏Change the Brightness setting in the Image menu. ❏Select Low or High for the Brightness Control option in the Setting menu. Low Brightness mode extends the life of the lamp and decreases the fan noise. Adjusting the Color Mode You may want to adjust the Color Mode option to select a setting that is appropriate for the image you’re projecting and the environment in which you’re projecting it. The following table lists the available color modes. To change the color mode, press the Color Mode button on the remote control until you see the mode you want. The currently selected setting appears in the upper right corner of the screen. You can also use the projector menu system to select the Color Mode setting in the Image menu. Correcting Computer Images If you’ve connected a computer and the image doesn’t look right, or it doesn’t fit properly on the screen, press the Auto button on the remote control or the Enter button on the projector. This automatically resets the projector’s tracking, sync, resolution, and position settings. Note: You must be projecting an image for this button to have any effect. Additionally, if the Auto Setup option in the Signal menu is set to OFF, the Auto function will not work. If the Auto button doesn’t correct the problem, you may need to adjust the tracking or sync using the projector’s Signal menu. Sleep Mode When the projector has not received any input signals for 30 minutes, it automatically turns off the projector lamp and enters “sleep mode.” This conserves electricity, cools the projector, and extends the life of the lamp. If you are done using the projector, unplug the power cord. If you want to start projecting again, press the P Power button. You can enable sleep mode in the Extended menu under Operation. Using Direct Power On The Direct Power On function enables faster setup. The projector will start up automatically when you plug it in; you won’t have to press the P Power button. Follow these steps to enable Direct Power On: 1. Press the Menu button on the remote control and select the Extended menu. 2. Choose Operation and press Enter. 3. Choose Direct Power On and press Enter. Color mode Description sRGBFor matching the color palette of standard sRGB computer displays. DynamicFor increased brightness in bright rooms (the default for non-computer display). PresentationFor computer presentations (the default when projecting from a computer with analog video). TheatreFor optimizing movie images with increased contrast. Living RoomFor increased brightness when playing video games or watching TV in a bright room. BlackboardFor projecting accurate colors on a green chalkboard (adjusts the white point).
Epson PowerLite 750c/760c Projector 8/05 Epson PowerLite 750c/760c Projector - 7 4. Highlight ON and press Enter. 5. Press Esc or Menu to exit. The setting will take effect the next time you plug in the projector. Note: When Direct Power On is enabled, shut down the projector as you normally would. Follow the instructions in the next section. (The projector will start automatically when power is restored after a power failure if it is plugged in.) Shutting Down the Projector When you’ve finished using the projector, follow the recommended procedure to shut it down. This extends the lamp life and protects the projector from possible overheating. 1. Turn off any equipment plugged into the projector. 2. To turn off the projector, press the P Power button on the projector or remote control. You see a confirmation message. (If you don’t want to turn it off, press any other button.) 3. Press the P Power button again. The Power light flashes orange as the projector cools down. When the projector beeps twice, it’s safe to unplug it. (If the projector is mounted on the ceiling, it takes 10 seconds to cool down before you can unplug the power cord.) Caution: Never unplug the projector when the Power light is green or flashing orange. To turn the projector on again, wait until the Power light stops flashing. Then press the P Power button. 4. Press up on the blue foot release lever and lower the projector to retract the front adjustable foot, as shown. 5. Replace the lens cap. Using the Remote Control When using the remote control, stand within 20 feet of the projector. Point the remote control either at the projector or at the screen (the projector’s front sensor can detect signals bounced off the screen). Press the button for the function you want to use. Turning Off the Picture and Sound You can use the A/V Mute button on the remote control to turn off the image and sound. This is useful if you want to temporarily re-direct your audience’s attention. ❏To turn off the picture and sound, press the A/V Mute button. The screen turns blue (or black or displays a user- defined image). ❏To turn the image and sound back on, press the A/V Mute button again. You can create an image, such as a company logo or a picture, to display on the screen whenever you press the A/V Mute button. See the User’s Guide for more information. Stopping Action Press the Freeze button to stop the action in your video or computer image and keep the current image on the screen. Note: This function pauses the image, but not the sound. Also, because the source continues to transmit signals, you won’t resume the action from the point you stopped it. To restart the action, press the Freeze button again. Zooming Your Image Follow these steps to zoom in on a portion of the image: 1. Press the E-Zoombutton on the remote control. You see a crosshair indicating the center of the zoom-in area. 2. Use the pointer button to position the crosshair in the area you want to enlarge. 3. Continue pressing the E-Zoombutton to enlarge the selected area up to 4 times. 4. While the image is enlarged, you can: ❏Use the pointer button to move around the screen. ❏Press the E-Zoombutton to zoom out. 5. When you’re done, press the Esc button to return the image to its original size.
Epson PowerLite 750c/760c Projector 8 - Epson PowerLite 750c/760c Projector 8/05 Using the Remote Control as a Wireless Mouse When you use the remote control as a wireless mouse, you can control your computer or click through slide show-style presentations (such as Microsoft ® PowerPoint®) from up to 20 feet away. Make sure you have connected the USB mouse cable between the projector and your computer. ❏To advance slides in a PowerPoint presentation in Slide Show mode, press the Page Up or Enter button on the remote control. Press the Page Down or Esc button to go back a slide. ❏To display the mouse pointer, press the Pointer button. ❏To move the pointer on the screen, aim the remote at the screen and use the pointer button. ❏To click (or left-click), press the Enter button. ❏To right-click, press the Esc button. ❏To double-click, press the Enter button twice. ❏To click and drag, press and hold the Enter button and use the pointer button to move the pointer, then release the Enter button. Replacing the Batteries Caution: When replacing batteries, take the following precautions: ❏Replace the batteries as soon as they run out. If a battery leaks, wipe away battery fluid with a soft cloth. If fluid gets on your hands, wash them immediately. ❏Do not expose batteries to heat or flame. ❏Dispose of used batteries according to local regulations. ❏Remove the batteries if you won’t be using the projector for a long time. Follow these steps to replace the AAA alkaline batteries: 1. Turn the remote control over. 2. Press down on the tab on the battery cover as you lift the cover off. 3. Remove the old batteries, then insert the new ones as shown. 4. Replace the battery cover. (It should snap into place.) Using the Projector Security Features To prevent unauthorized use of the projector, you can do the following: ❏Assign a password; this can be disabled for a set period if you want to loan the projector to someone. ❏Create an identifying user logo that is displayed at startup and/or when the A/V Mute button is pressed. (See the User’s Guide for instructions.) ❏Disable the projector’s buttons; this is useful, for example, if you’re projecting in a classroom and you want to ensure that no one touches the projector’s buttons while you’re using the remote control. See page 10 for instructions. Page up or page downMove the pointer Left-click or double-clickRight-click Display the pointer
Epson PowerLite 750c/760c Projector 8/05 Epson PowerLite 750c/760c Projector - 9 If you assign a password for the projector, a screen appears requesting the password whenever you plug in and turn on the projector. If you enter the password incorrectly three times in succession, the projector’s operation is locked. Disconnect the projector and reconnect it. If you enter the incorrect password 30 times in a row, the projector is locked and remains locked until an authorized Epson servicer can unlock it. If you create a user’s logo for the projector, you can set up the logo so it is displayed as the startup screen and/or AV/Mute screen. Unauthorized users cannot turn it off or change it. This feature is intended to discourage theft and provides a way to identify the projector should it be stolen. Additionally, to make sure a borrowed projector is returned, you can temporarily disable the password for a set period of time. When that time has elapsed, the password function is reactivated and you must enter the password before you can use the projector. Note: If you should happen to enable the password before you set one, and you see the prompt to enter the password, enter the default password 0000 to proceed. If you lose the remote control, you will not be able to enter the password; so keep the remote control in a safe place at all times. Setting a Password 1. Press the Freeze button on the remote control for about 5 seconds, until you see the Password Protect menu: If a password has already been set, you see the Password Protect Release screen. See “Starting the Projector with a Password” on page 10. 2. Set Power ON Protect to ON and press Enter. 3. Press Esc. 4. Select Password and press Enter. You see the message Change the password? 5. Select Yes and press Enter. 6. Hold down the Num button on the remote control and use the numeric keypad to enter a 4-digit password.The password will be displayed as ****. After you enter the last digit, a confirmation screen appears. Enter the password again. 7. After you finish setting the password, press the Esc button to return to the Password Protect menu. Make a note of the password and keep it in a safe place in case you forget it. Turning On the Password and User’s Logo To enable the password and User’s Logo, follow these steps: 1. Press the Freeze button on the remote control for about 5 seconds until you see the Password Protect menu. 2. Select Power ON Protect and press Enter. 3. Select ON and press Esc. After turning on this feature, you have to unplug the projector (not just turn it off) in order to activate it. The password prompt appears only after plugging in the projector and turning it on. 4. If you want to disable the password temporarily so someone can use the projector without entering the password, select Timer and press Enter. Then hold down the Num button while you use the numeric keypad to enter the number of hours (from 0 to 9999) you want the password feature disabled. If you want the projector to request the password every time it is turned on, set the timer to 0H. The timer starts counting as soon as you close the Password Protect menu. (You can check the elapsed time in this menu next to Time elapsed.) When the period defined in the Time-elapsed setting has passed, and the password is entered correctly, the elapsed time is reset to 0H and the timer starts again. Remember to disable or change this setting when you’re finished using it. 5. To enable your User’s Logo, select User’s Logo Protect and press Enter. Then select ON and press Enter. When this feature is on, the logo appears whenever the projector is turned on (if the Startup Screen is enabled in the Extended menu) and as the A/V Mute screen (if you selected Logo as the Background Color in the Extended menu). Note: None of the User’s Logo features can be changed when the User’s Logo Protect function is enabled. 6. Press Menu to close the Password Protect menu. Numeric keypad Num button
Epson PowerLite 750c/760c Projector 10 - Epson PowerLite 750c/760c Projector 8/05 Starting the Projector with a Password Note: You must unplug the projector and then plug it back in to enable password protection. When the password function is enabled, you see this screen when you plug in and turn on the projector: Hold down the Num button on the remote control as you use the numeric keypad to enter the password. Once you enter the password correctly, the screen closes, and projection begins. If the password is not correct, you see the message Wrong password. Please try again . If you enter an incorrect password three times in succession, you see the message The projector’s operation will be locked. Request code xxxxx and the projector switches to standby mode for approximately 5 minutes. Write down the request code. Then disconnect the projector’s power cord from the electrical outlet, reconnect it, and turn the projector back on. When you see the Password Protect Release screen, enter the correct password. If you have forgotten the password, contact Epson for assistance and give them the request code number that appears in the Password Protect Release screen. If you enter an incorrect password 30 times in a row, the projector remains locked and you must contact an authorized Epson servicer to unlock it. Disabling the Projector’s Buttons When you enable the Operation Lock function, all the projector’s buttons are disabled except the P Power button. 1. Press the Menu button. 2. Select the Setting menu and press Enter. 3. Select Operation Lock and press Enter. 4. Select ON and press Enter. Then select Yes and press Enter to confirm the setting. 5. Press the Menu button to exit the menu system. Note: You can cancel Operation Lock by pressing the projector’s Enter button for 7 seconds. Projector Status Lights The lights on top of the projector indicate the projector’s status and let you know when a problem occurs. Light Status Description Orange The projector is in standby mode. You can unplug it or press the P Power button to turn it on. Flashing greenThe projector is warming up. Wait for the image to appear. Green The projector is operating normally. Flashing orangeThe projector is cooling down. You can’t turn it back on (and you should not unplug it) until the light stops flashing and remains orange. Red There is a problem with the projector. Check the other two lights and the information in this table to diagnose the problem. Flashing red There is a problem with the fan or temperature sensor. Stop using the projector, disconnect the power cable, and contact Epson. Flashing orangeRapid cooling is in progress. Although this is not an abnormal condition, projection will stop automatically if the temperature rises higher. Make sure there is plenty of space around and under the projector for ventilation, and that the air filters and vents are clear. Power light Lamp light Temperature light