1275. Using On-Screen MenuNOTE:• When [HIGH ALTITUDE] is selected for [FAN MODE], a symbol icon will be displayed at the bottom of the menu.• It is recommended that you select High speed mode if you use the projector non-stop for consecutive days.• Set [FAN MODE] to [HIGH ALTITUDE] when using the projector at altitudes approximately 5500 feet/1600 meters or higher.• Using the projector at altitudes approximately 5500 feet/1600 meters or higher without setting to [HIGH ALTITUDE] can causethe projector to overheat and the protector could shut down. If this happens, wait a couple minutes and turn on the projector.• Using the projector at altitudes less than approximately 5500 feet/1600 meters and setting to [HIGH ALTITUDE] can cause thelamp to overcool, causing the image to flicker. Switch [FAN MODE] to [AUTO].• Using the projector at altitudes approximately 5500 feet/1600 meters or higher can shorten the life of internal parts such as thelamp.• Your setting will not be affected even when [RESET] is done from the menu.Selecting the Signal Format [SIGNAL SELECT(COMP3)]When an output device is connected to the COMPUTER 3 video input connectors, this sets the input signal.RGB/COMPONENT � RGB and component signals are identified automatically�VIDEO �������������������� This switches to the video signal�NOTE: When a video cable (commercially available) is connected to the COMPUTER 3 video input connectors’ G/Y connector, videosignals can be projected. In this case, set to “VIDEO”.[SEAMLESS SWITCHING] (for PX750U only)When the input connector is switched, the image displayed before switching is held to switch to the new image withouta break due to absence of a signal.[COLOR SYSTEM]This feature allows you to select the TV video signal, which differs from country to country (NTSC, PAL, etc.).This is set to [AUTO] by factory default. Set this if the projector cannot identify the signal automatically.Setting for the Optional Board [SLOT POWER]When using the optional board such as SB-01HC installed in the slot, set the following options.PROJECTOR ON �����������������This feature will turn on or off the power to the optional board.OFF: Forcibly turn off the power to the optional board installed in the slot�ON (Default): Turn on the power to the optional board installed in the slot�PROJECTOR STANDBY �������This feature will automatically enable or disable the optional board installed in the slotwhen the projector is in standby.DISABLE: Select this option to disable the optional board in the projector standby�ENABLE (Default): Select this option to enable the optional board in the projector standby�NOTE:• Select [OFF] when the optional board is not installed into the slot.