The HT3550 Control Panel is located on the top near the back, straight back from the door for the lens controls. There’s nothing particularly special about this control panel. Consider:
There’s the usual power button – press once to power on, press twice to power down – located furthest to the right. A small LED light indicating power status is just above it. There are two more indicator lights as you move to the right from the Power light, labeled Temperature, and Lamp.
Directly to the right of the Power button is the navigation area, consisting of the four arrow keys in a round formation. The enter button (labeled “OK”) is found in the middle. All the arrows take on other jobs when you aren’t in the menu system. The up and down arrows let you adjust keystone correction (best to avoid – use lens shift if possible), while the left and right arrows control volume down and up, respectively.
That leaves only the three buttons at the bottom. The middle button is the Menu button, while the one to the right of Menu, is the Back button which takes you back up one level in the menu system when pressed.
Since there is only one more button – to the right of the Menu button – it naturally is the Source button, to select between the various sources you have connected to the HT3550. The projector does have an Auto-Source option which will automatically go to the active live source it finds.
No surprises, just a good, solid control panel.
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