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Blank Screen: determines what color displays when you press the Blank button on the remote or when no source is active.

Language: allows you to select a language for the onscreen display of menus and messages.

Service Menu

Use these features, highlight them and press Select.

Factory Reset: restores all settings (except Lamp Hours, Ceiling, and Rear) to their default after displaying a confirmation dialog box.

Test Pattern: displays a test pattern when the Blank button on the remote is pressed. To select the patterns, use the up/down arrows on the remote or keypad.

Service Code: only used by authorized service personnel.

Maintenance

Cleaning the lens

Apply a non-abrasive camera lens cleaner to a soft, dry cloth.

Avoid using an excessive amount of cleaner, and don’t apply the cleaner directly to the lens. Abrasive cleaners, solvents or other harsh chemicals might scratch the lens.

Lightly wipe the cleaning cloth over the lens in a circular motion. If you don’t intend to use the projector immediately, replace the lens cap.

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Knoll HD284 user manual Maintenance, Cleaning the lens