Basic Operations
Adjusting the Monitor Viewing Angle
Adjust the monitor's angle for better visibility.
1 While viewing the screen that is shown press the ANGLE 9 or 8 button to adjust the display to the ideal viewing angle.
The display viewing angle can be adjusted between about 80 and 105 degrees.
2 Press the 9or 9 button to adjust the
Press and hold the OPEN/CLOSE button of the main unit for at least 2 second. This will return the monitor quickly to its center viewing position.
NOTES
• The angle changes continuously if the ANGLE 9 and 8 buttons or the 9and 9 buttons are held down.
•If there are any obstructions to the monitor when adjusting the angle, first remove the obstruction and then readjust the angle.
•The screen color will vary when viewed at certain angles. Adjust the screen angle for the best viewing position.
•If the voltage of the vehicle's battery power is low, the screen may blink when the screen angle is changed. This is normal and not a malfunction.
•The adjusted angle is stored in the memory.
Adjusting the Volume
1 Press the 
or 
button to adjust the volume.
NOTE
The volume changes continuously if the 
or 
button is held down. This operation will affect the headphone and External Audio outputs only. The IR signal for the wireless headphones are not affected.
Audio Mute Function
Activating this function will instantly lower the volume level by 20 dB.
1 Press the MUTE button to activate the MUTE mode. The audio level will decrease by about 20 dB.
Pressing the MUTE button again will bring the audio back to its previous level.
Switching the Source
1 Press the SOURCE button. Each press of the button will switch through the modes as follows:
AUX1 
AUX2
NOTES
•If nothing is connected to AUX 1 or AUX 2, raising the volume while these inputs are selected, may result in excessive noise.
•In addition to the Remote Control Source button, each AUX input has its own wired select trigger. This is called the External AV Select (Pink/Blue) wire.
•The External AV Select trigger is a pulsed signal (Active Low, 500ms or more). If this input is remains low, switching to other sources is not possible (Switching sources using the Remote Control is still possible). This is useful if you don’t want an AV source to be interrupted. Playing a video is a good example of this scenario. This function is mainly used for connecting with other ALPINE products.