NEC LT180 manual Throw Distance and Screen Size, Distance Chart

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2. INSTALLATION AND CONNECTIONS

Throw Distance and Screen Size

The following shows the proper relative positions of the projector and screen. Refer to the table to determine the position of installation.

Distance Chart

Screen Width

Screen Diagonal

Screen Height

Screen center

(B)

(D)

Screen Bottom

Lens Center

Throw Angle (α )

Throw Distance (C)

	Screen Size (4:3)						B						C			D					α
Diagonal		Width		Height		wide			tele		wide		tele		wide			tele		wide		tele
inch	mm	inch	mm	inch	mm	inch	mm		inch	mm	inch	mm	inch	mm	inch	mm		inch	mm	degree		degree
30	762.0	24.0	609.6	18.0	457.2	7.1	181.4		7.2	182.1	31.4	797.7	37.7	957.2	-1.8	-45.2		-1.8	-45.5	12.8		10.8
40	1016.0	32.0	812.8	24.0	609.6	9.5	241.8		9.6	242.8	42.5	1080.1	50.9	1292.6	-2.4	-60.2		-2.4	-60.2	12.6		10.6
50	1270.0	40.0	1016.0	30.0	762.0	11.9	302.2		11.9	303.5	53.6	1362.6	64.1	1628.0	-3.0	-75.3		-3.0	-75.8	12.5		10.6
60	1524.0	48.0	1219.2	36.0	914.4	14.3	362.6		14.3	364.2	64.8	1645.0	77.3	1963.4	-3.6	-90.3		-3.6	-90.9	12.4		10.5
67	1701.8	53.6	1361.4	40.2	1021.1	15.9	404.9		16.0	406.7	72.5	1842.7	86.5	2198.2	-4.0	-100.9		-4.0	-101.5	12.4		10.5
72	1828.8	57.6	1463.0	43.2	1097.3	17.1	435.1		17.2	437.1	78.1	1984.0	93.1	2365.9	-4.3	-108.4		-4.3	-109.1	12.4		10.5
84	2133.6	67.2	1706.9	50.4	1280.2	20.0	507.6		20.1	509.9	91.5	2322.9	109.0	2768.3	-5.0	-126.4		-5.0	-127.3	12.3		10.4
90	2286.0	72.0	1828.8	54.0	1371.6	21.4	543.8		21.5	546.3	98.1	2492.4	116.9	2969.6	-5.3	-135.5		-5.4	-136.4	12.3		10.4
100	2540.0	80.0	2032.0	60.0	1524.0	23.8	604.2		23.9	607.0	109.2	2774.8	130.1	3305.0	-5.9	-150.5		-6.0	-151.5	12.3		10.4
120	3048.0	96.0	2438.4	72.0	1828.8	28.5	725.0		28.7	728.4	131.5	3339.7	156.5	3975.8	-7.1	-180.6		-7.2	-181.8	12.3		10.4
150	3810.0	120.0	3048.0	90.0	2286.0	35.7	906.2		35.8	910.5	164.8	4187.1	196.1	4982.0	-8.9	-225.7		-8.9	-227.3	12.2		10.4
180	4572.0	144.0	3657.6	108.0	2743.2	42.8	1087.4		43.0	1092.6	198.2	5034.4	235.8	5988.2	-10.7	-270.9		-10.7	-272.7	12.2		10.3
200	5080.0	160.0	4064.0	120.0	3048.0	47.6	1208.2		47.8	1214.0	220.4	5599.3	262.2	6658.9	-11.9	-301.0		-11.9	-303.0	12.2		10.3

B = Vertical distance between lens center and screen center C = Throw distance

D = Vertical distance between lens center and bottom of screen for desktop (top of screen for ceiling)

α= Throw angle

NOTE: Distances may vary +/-5%.

E-12

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Contents LT180 DOC Compliance Notice Safety CautionsPrecautions Important InformationInstallation Important SafeguardsRF Interference Iii Fire and Shock PrecautionsWhat’s in the Box? Lamp ReplacementTable of Contents Table of Contents Congratulations on Your Purchase of The LT180 Projector Features you’ll enjoy on the LT180 projectorIntroduction Introduction to the ProjectorIntroduction Part Names of the Projector Top Features Terminal Panel Features Part Names of the Remote Control Introduction Remote Control Precautions Battery InstallationOperating Range for Wireless Remote Control Installation and Connections Selecting a Location Setting Up the Screen and the ProjectorThrow Distance and Screen Size Distance ChartRear Projection Applications Making Connections Connecting Your PC or Macintosh ComputerADP-SC1 To connect Scart output RGBTo do so Connecting an External MonitorComponent Audio in OUT Connecting Your DVD PlayerVideo Connecting Your VCR or Laser Disc PlayerConnecting the Supplied Power Cable Projecting AN Image Basic Operation Cabinet controls Remote controlTurning on the Projector Cabinet controls Selecting a Source Adjusting the Picture Size and PositionUsing the cabinet buttons Using the Remote ControlUsing the Adjustable Rear Foot Zoom Adjusting the Tilt FootFocus Correcting the Vertical Keystone DistortionAdjusting the Image Using Auto Adjust Turning Up or Down VolumeOptimizing an RGB Image Automatically To turn off the projector Turning off the ProjectorAfter Use Reducing Video Noise Noise Reduction Convenient FeaturesTurning Off the Image and Sound Freezing a PictureGetting the Information on Lamp Usage and Projector Usage Using the Menus Using ON-SCREEN MenuFor Selecting items Return key symbol, Radio button For Adjusting items Slide barFor Selecting items Solid triangle List of Menu Items Picture AdjustmentSelecting Wall Color Correction Mode Wall Color Menu Descriptions & FunctionsImage Normal Cinema Native Selecting Aspect Ratio Aspect RatioSetup Preventing the Unauthorized use of the projector Security AdvancedSelecting Projector Orientation Orientation Selecting Communication Speed Communication SpeedUsing ON-SCREEN Menu To disable the Security function Disabling the Cabinet Buttons Cabinet Button Enabling Fan Speed Mode Fan ModeEnabling Power Management Power Management Selecting Signal Format Signal SelectInformation All Data ResetReturning to Factory Default Factory Default Current SignalPreparation MaintenanceReplacing the Lamp To replace the lampSelect Elect Push here Cleaning the Cabinet and the Lens Lamp Indicator TroubleshootingPower Indicator Indicator Condition Projector Condition Status IndicatorDoes not turn on Common Problems & SolutionsProblem Check These Items Troubleshooting Model Number LT180 Optical SpecificationsElectrical Mechanical Appendix Cabinet DimensionsMini D-Sub 15 Pin Connector Pin Assignments of Computer in D-Sub RGB ConnectorPin No RGB Signal Analog YCbCr Signal Cable Connection PC Control Connector Mini DIN-8PPC Control Codes and Cable Connection PC Control codesSignal Compatible Input Signal ListOther Troubleshooting Check ListPower Video and AudioVideo equipment Installation environmentSignal cable ComputerReplacement product rental service Repair servicesTravelCare Guide North America EuropeOceania Asia and Middle East Huamark, Bangkapi, Bangkok 10240, Thailand Company & Name with signature Dear Sir s To NEC or NECs Authorized Service StationCharges for Warranty Exclusions and Out of Warranty Case Condition of your TravelCare Service ProgramService Options Warranty ExclusionsLoan Service Charges and Conditions