1.Press MENU/EXIT and then press 
/ 
until the SYSTEM SETUP: Advanced menu is highlighted.
2.Press 
to highlight High Altitude Mode and press 
/ 
select On. A confirmation message appears.
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
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 15 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 appears.
3.Highlight Mute and press 
/ 
to select On.
If available, you can also press Mute on the remote control to toggle projector audio between on and off.
Adjusting the sound level
To adjust the sound level, press Volume +/- or 
/ 
, or:
1.Repeat steps
2.Press 
to highlight Volume and press 
/ 
to select a desired sound level.
Turning off the Power On/Off Ring Tone
To turn off the ring tone:
1.Repeat steps
2.Press 
to highlight Power On/Off Ring Tone and press 
/ 
to select Off.
The only way to change Power On/Off Ring Tone is setting On or Off here. Setting the sound mute or changing the sound level will not affect the Power On/Off Ring Tone.
32 Operation
