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Source buttons to switch among sources (to assign a particular source to a source button, see page 21) and a source toggle

Resize button to change the Aspect Ratio (see page 18)

Auto Image button to resynchronize the projector to the source

Preset button to restore stored settings (see page 19)

Overscan button to remove noise in a video image (page 19)

Troubleshooting the remote

Make sure the batteries are installed in the proper orientation and are not dead.

Make sure you’re pointing the remote at the projector or the screen, not at the video device or the computer, and ensure you are within the remote range of 30 feet (9.14m).

Using the audio

To play sound from the projector, connect your source to the Audio In connector on the projector.

To adjust the volume, mute or turn off the projector’s chime, use the Audio menu (see page 16).

Troubleshooting audio

If there is no sound, check the following:

Make sure the audio cables are connected.

Make sure mute isn’t active in the Audio menu.

Make sure the volume is turned up enough.

Adjust the audio source.

If playing a video, make sure the playback has not been paused.

Customizing the projector

You can customize the projector for your specific setup and needs. See page 21 to page 23 for details on these features.

For rear projection, turn Rear mode on in the Settings>System menu.

For ceiling mounted projection, turn Ceiling mode on in the Settings> System menu.

Turn on Automatic Vertical Keystone adjustments.

Specify which source the projector checks first for active video during power-up.

Turn the projector’s display messages on and off.

Turn on power saving features.

Specify blank screen colors and startup logos.

Specify the menu language.

Control your projector using RS232 commands. See page 5.

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Knoll Systems HD225 Troubleshooting the remote, Using the audio, Troubleshooting audio, Customizing the projector