Cleaning for Front Ventilation
Use vacuum cleaner to remove any dust or threads accumulation away from both the ventilation holes on front
cover and ventilation grids on chassis exposed after removal of the front cover.
Front Ventilation Grids on Chassis 
Ventilation Holes on Front Cover
Replacing Front Cover
Follow the opposite procedure as removing the front cover to replace the front cover in position. Please make sure the all hooks on front cover is well positioned into chassis. Please remember to check that the power switch is at “Off” position before power and signal connection.
Accessing Side Ventilation Grids
The operation to further clean the side ventilation grids requires much more highly technical maneuver. Therefore careful attentions must be taken throughout the further cleaning operations below. When the main unit is opened, there must be no liquid spill, no
Please first disconnect every cable from the main unit and turn the LCD panel to straight up position. Prepare enough space in front of the HT system and lay a piece of clean soft clothe of appropriate size there to prevent damage. With the back cable
cover opened, push in the circled spring button in the right picture on both sides
of chassis and raise the rear edge of the top cover. Apply some mild maneuver if there is already a pole display mounted.
Part 19
