User manual BENQ GW2250HM

[. . . ] Do not block the projection lens with any objects when the projector is under operation as this could cause the objects to become heated and deformed or even cause a fire. To temporarily turn off the lamp, press BLANK on the projector or remote control. Always open the lens shutter (if any) or remove the lens cap (if any) when the projector lamp is on. Allow the projector to cool for approximately 45 minutes prior to removing the lamp assembly for replacement. [. . . ] Press to select a menu item to be changed and adjust the value with / . See "Fine-tuning the image quality in user modes" below for details. When all settings have been done, highlight Save Settings and press MODE/ENTER to store the settings. Fine-tuning the image quality in user modes According to the detected signal type, there are some user-definable functions available when User 1 or User 2 is selected. Based on your needs, you can make adjustments to these functions by highlighting them and pressing / on the projector or remote control. Adjust this control so the black areas of the image appear just as black and that detail in the dark areas is visible. +30 +50 +70 Adjusting Contrast The higher the value, the greater the contrast. Use this to set the peak white level after you have previously adjusted the Brightness setting to suit your selected input and viewing environment. -30 0 +30 Adjusting Color Lower setting produces less saturated colors. If the setting is too high, colors on the image will be overpowering, which makes the image unrealistic. Adjusting Tint The higher the value, the more reddish the picture becomes. Increasing its range will include red close to yellow and red close to magenta. Press to highlight Saturation and adjust its values to your preference by pressing / . Magenta Cyan BLUE For example, if you select Red and set its value at 0, only the saturation of pure red will be affected. Lower settings produce less saturated colors; a setting of “0” removes that color from the image entirely. If the saturation is too high, that color will be overpowering and unrealistic. Press to highlight Gain and adjust its values to your preference by pressing / . Setting the presentation timer Presentation timer can indicate the presentation time on the screen to help you achieve better time management when giving presentations. Go to the SYSTEM SETUP: Basic > Presentation Timer menu and press MODE/ ENTER to display the Presentation Timer page. The length of time can be set from 1 to 5 minutes in 1-minute increments and 5 to 240 minutes in 5minute increments. Press to highlight Timer Display and choose if you want the timer to show up on the screen by pressing / . Description Displays the timer on screen throughout the presentation Always time. [. . . ] €¢ • Reconnect the lamp connector to the projector. Loose screw may cause a bad connection, which could result in malfunction. €¢ • Tighten the screw that secures the lamp cover. Loose screw may cause a bad connection, which could result in malfunction. [. . . ]