Planar PD7170 用户手册

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To turn test patterns off, press any key other than   or   on the remote control 

unit or built-in keypad.

Altitude: Select Altitude from the Service Menu to control the operation of the 

projector’s cooling fan. 

In most cases, the default setting (Auto) will maintain the correct operating 

temperature. If the lamp frequently turns off due to overheating, or in certain 

high-altitude operating environments, you may need to change this setting to 

High.