BenQ HT3550 User Manual - Page 33

2. Equivalent Lamp Hour = ө hours , if өːʳʳʳAʳʳ'ʳx X+ A'xY+ A' xZʳʳ X Y Z X = lamp life spec of Normal mode Y = lamp life spec of Eco mode Z = lamp life spec of SmartEco mode A' is the longest lamp life spec among X, Y, Z For Time used in each lamp mode shown in OSD menu: - Time used is accumulated and rounded down to an integer in Hours. - When time used is less than 1 hour, it shows 0 hours. When you calculate Equivalent Lamp hour manually, it will probably have deviation from the value shown in OSD menu since projector system calculates Time used for each lamp mode in "Minutes" then rounds down to an integer in hours shown in OSD. To obtain the lamp hour information: 1. Go to SYSTEM SETUP: ADVANCED Menu > Lamp Settings and press OK. The Lamp Settings page appears. 2. Press to select Lamp Timer and press OK. The Lamp Timer information is displayed. You can also get the lamp hour information on the INFORMATION menu. Extending lamp life • Setting the Light Mode Go to PICTURE Menu > Advanced > Light Mode and select a suitable lamp power from among the provided modes. Setting the projector in Economic or SmartEco mode extends lamp life. Lamp mode Normal Economic SmartEco Description Provides full lamp brightness Lowers brightness to extend the lamp life and decreases the fan noise Adjusts the lamp power automatically depending on the content brightness level while optimizing display quality • Setting Auto Off This function allows the projector to turn off automatically if no input signal is detected after a set period of time to prevent unnecessary waste of lamp life. To set Auto Off, go to SYSTEM SETUP: BASIC Menu > Auto Off and press / . Timing of replacing the lamp When the Lamp indicator lights up or a message appears suggesting it is time to replace the lamp, please consult your dealer or go to http://www.BenQ.com before installing a new lamp. An old lamp may cause a malfunction in the projector and in some instances the lamp may explode. • The apparent brightness of the projected image will vary depending on the ambient lighting conditions, selected input signal contrast/brightness settings, and is directly proportional to projection distance. • The lamp brightness will decline over time and may vary within the lamp manufacturers specifications. This is normal and expected behavior. • The LAMP indicator light and TEMPerature warning light will light up if the lamp becomes too hot. Turn the power off and let the projector cool for 45 minutes. If the Lamp or Temp indicator still lights up after turning the power back on, please contact your dealer. See Indicators on page 37. Maintenance 33