Operating in a high altitude environment
We recommend you use the High Altitude Mode when your environment is between 1500 m
Do not use the High Altitude Mode if your altitude is between 0 m and 1500 m and ambient temperature is between 0°C and 35°C. The projector will be over cooled, if you turn the mode on under such a condition.
To activate the High Altitude Mode:
1.Press Menu/Exit and then press 
/ 
until the SYSTEM SETUP: Advanced menu is highlighted.
2.Press 
to highlight High Altitude Mode and press 
/ 
to select On. A confirmation message displays.
3.Highlight Yes and press Mode/Enter.
Operation under "High Altitude Mode" may cause a higher decibel operating noise level because of increased fan speed necessary to improve overall system cooling and performance.
If you use this projector under other extreme conditions excluding the above, it may display auto
However, this is not to state that this projector can operate under any and all harsh or extreme conditions.
Adjusting the sound
The sound adjustments made as below will have an effect on the projector speaker(s). Be sure you have made a correct connection to the projector audio input. See "Connection" on page 18 for how the audio input is connected.
Muting the sound
To temporarily turn off the sound:
1.Press Menu/Exit and then press 
/ 
until the SYSTEM SETUP: Advanced menu is highlighted.
2.Press 
to highlight Audio Settings and press Mode/Enter. The Audio Settings page displays.
3.Highlight Mute and press 
/ 
to select On.
Adjusting the sound level
To adjust the sound level, press Volume +/- on the remote control, or:
1. Repeat steps
2. Press 
to highlight Volume and press 
/ 
to select a desired sound level.