NEC LT155, LT154 user manual Distance Chart, Ceiling Installation, Reflecting the Image, Inch

Distance Chart

Screen top

B

Lens Center

D

Screen Bottom

Throwing Distance (C)

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 installa- tion)

Ceiling Installation

Screen top

D

Lens Center

B

Screen center

Screen Bottom

Projector Foot

1.6” (40.3mm)

Throwing Angle (α)

Throwing Distance (C)

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 in- jured and the projector severely damaged.

•Do not use the projector where temperatures vary greatly. The projector must be used at tempera- tures 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 ▲▼ 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 ▲▼ buttons on your remote control to correct the orientation. (See page E-37.)

		Screen Size				B					C					D			α
Diagonal		Width		Height					wide				tele					wide		tele
inch	mm	inch	mm	inch	mm	inch	mm	inch		mm	-	inch		mm	inch		mm	degree	-	degree
25	635	20	508	15	381	6	150	-		-	-	44		1110	-1		-40	-	-	7.8
30	762	24	610	18	457	7	180	46		1170	-	53		1350	-2		-50	8.9	-	7.8
40	1016	32	813	24	610	10	240	62		1580	-	72		1820	-2		-60	8.8	-	7.7
60	1524	48	1219	36	914	14	370	94		2400	-	109		2760	-4		-90	8.7	-	7.6
80	2032	64	1626	48	1219	19	490	127		3220	-	146		3700	-5		-120	8.6	-	7.5
100	2540	80	2032	60	1524	24	610	159		4030	-	183		4640	-6		-150	8.6	-	7.5
120	3048	96	2438	72	1829	29	730	191		4850	-	220		5580	-7		-180	8.6	-	7.5
150	3810	120	3048	90	2286	36	920	239		6080	-	275		6990	-9		-230	8.6	-	7.5
180	4572	144	3658	108	2743	43	1100	288		7300	-	331		8400	-11		-270	8.6	-	7.5
200	5080	160	4064	120	3048	48	1220	320		8120	-	368		9340	-12		-300	8.6	-	7.5
240	6096	192	4877	144	3658	58	1470	384		9760	-	442		11220	-14		-360	8.6	-	7.4
261	6629	209	5304	157	3978	63	1600	418		10610	-	481		12210	-16		-390	8.5	-	7.4
270	6858	216	5486	162	4115	65	1650	432		10980	-	-		-	-16		-410	8.5	-	-
300	7620	240	6096	180	4572	72	1830	481		12210	-	-		-	-18		-450	8.5	-	-

NOTE: Distances may vary +/–5%.

E – 17