BenQ TK850 User Manual - Page 13

If your measured projection distance is 5000 mm, the closest match in the "Distance from screen (mm)" column is 4893 mm. Looking across this row shows that a 170'' (about 4.3 m) screen is required. • All measurements are approximate and may vary from the actual sizes. BenQ recommends that if you intend to permanently install the projector, you should physically test the projection size and distance using the actual projector in situ before you permanently install it, so as to make allowance for this projector's optical characteristics. This will help you determine the exact mounting position so that it best suits your installation location. • To optimize your projection quality, we suggest doing the projection by following the values in the non-gray cells. • The values in the gray cells are for reference only. Shifting the projection lens Desk-front projection 1V min. 0 V max. 0.1 V • Please stop turning the afjustment knob when you hear a clicking sound indicating the the knob has reached its limit. Over-turning the knob may cause damage. Mounting the projector If you intend to mount your projector, we strongly recommend that you use a proper fitting BenQ projector mounting kit and that you ensure it is securely and safely installed. If you use a non-BenQ brand projector mounting kit, there is a safety risk that the projector may fall down due to an improper attachment through the use of the wrong gauge or length screws. Before mounting the projector • Purchase a BenQ projector mounting kit from the place you purchased your BenQ projector. • BenQ recommends that you also purchase a separate Kensington lock compatible security cable and attach it securely to both the Kensington lock slot on the projector and the base of the mounting bracket. This will perform the secondary role of restraining the projector should its attachment to the mounting bracket become loose. • Ask your dealer to install the projector for you. Installing the projector on your own may cause it to fall and result in injury. • Take necessary procedures to prevent the projector from falling off such as during an earthquake. • The warranty doesn't cover any product damage caused by mounting the projector with a non-BenQ brand projector mounting kit. Positioning your projector 13