NEC LT154 User Manual - Page 17

Distance Chart Screen top Throwing Distance (C) B Lens Center D Screen Bottom Screen center Throwing Angle (α) 1.6" (40.3mm) Projector Foot B=Vertical distance between lens center and screen center C=Throw distance D=Vertical distance between lens center and screen bottom (screen top for ceiling installation) Ceiling Installation Screen top D Lens Center B Screen center 1.6" (40.3mm) Throwing Angle (α) Screen Bottom Throwing Distance (C) Projector Foot WARNING • Installing your projector on the ceiling must be done by a qualified technician. Contact your NEC dealer for more information. * Do not attempt to install the projector yourself. • Only use your projector on a solid, level surface. If the projector falls to the ground, you can be injured and the projector severely damaged. • Do not use the projector where temperatures vary greatly. The projector must be used at temperatures between 32˚F (0˚C) and 95˚F (35˚C). • Do not expose the projector to moisture, dust, or smoke. This will harm the screen image. • Ensure that you have adequate ventilation around your projector so heat can dissipate. Do not cover the vents on the side or the front of the projector. If your projector is mounted on the ceiling and your image is upside down, use the "Menu" and "Select" buttons on your projector cabinet or LM button on your remote control to correct the orientation. (See page E-37.) Reflecting the Image Using a mirror to reflect your projector's image enables you to enjoy a much larger image. Contact your NEC dealer if you need a mirror. If you're using a mirror and your image is inverted, use the "Menu" and "Select" buttons on your projector cabinet or LM buttons on your remote control to correct the orientation. (See page E-37.) Screen Size B C Diagonal Width Height wide inch mm inch mm inch mm inch mm inch mm - 25 635 20 508 15 381 6 150 - - - 30 762 24 610 18 457 7 180 46 1170 - 40 1016 32 813 24 610 10 240 62 1580 - 60 1524 48 1219 36 914 14 370 94 2400 - 67 1702 54 1361 40 1021 16 410 106 2680 - 72 1829 58 1463 43 1097 17 440 114 2890 - 80 2032 64 1626 48 1219 19 490 127 3220 - 84 2134 67 1707 50 1280 20 510 133 3380 - 90 2286 72 1829 54 1372 22 550 143 3620 - 100 2540 80 2032 60 1524 24 610 159 4030 - 120 3048 96 2438 72 1829 29 730 191 4850 - 150 3810 120 3048 90 2286 36 920 239 6080 - 180 4572 144 3658 108 2743 43 1100 288 7300 - 200 5080 160 4064 120 3048 48 1220 320 8120 - 210 5334 168 4267 126 3200 51 1280 336 8530 - 240 6096 192 4877 144 3658 58 1470 384 9760 - 261 6629 209 5304 157 3978 63 1600 418 10610 - 270 6858 216 5486 162 4115 65 1650 432 10980 - 300 7620 240 6096 180 4572 72 1830 481 12210 - NOTE: Distances may vary +/-5%. E - 17 D α tele wide tele inch mm inch mm degree - degree 44 1110 -1 -40 - - 7.8 53 1350 -2 -50 8.9 - 7.8 72 1820 -2 -60 8.8 - 7.7 109 2760 -4 -90 8.7 - 7.6 122 3090 -4 -100 8.7 - 7.6 131 3320 -4 -110 8.7 - 7.5 146 3700 -5 -120 8.6 - 7.5 153 3890 -5 -130 8.6 - 7.5 164 4170 -5 -140 8.6 - 7.5 183 4640 -6 -150 8.6 - 7.5 220 5580 -7 -180 8.6 - 7.5 275 6990 -9 -230 8.6 - 7.5 331 8400 -11 -270 8.6 - 7.5 368 9340 -12 -300 8.6 - 7.5 386 9810 -12 -320 8.7 - 7.5 442 11220 -14 -360 8.6 - 7.4 481 12210 -16 -390 8.5 - 7.4 - - -16 -410 8.5 - - - - -18 -450 8.5 - -