NEC PX750U - Stacking Projectors

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6. Installation and Connections
Stacking projectors
Theprojectedimagebrightnesscanbedoubledbygravitystackinguptotwoprojectorswithoutexternalsupport.This
iscalled“StackingProjection”.
CAUTION:
Aminimumoftwopersonsarerequiredtocarrytheprojector.Otherwisetheprojectormaytumbleordrop,causing
personalinjury.
NOTE:
• Projectorswithdifferentmodelnumberscannotbegravitystacked.
Optional lenses with the same model numbers must be used for stacking projection.
• Forstackingprojectors,attachthesuppliedthreestackingholderstothetopofthelowerprojector.(→ next page)
• Thestackingprojectiondoesnotsupportaccuracyforoverlayingtwoimagesperfectlysothatsmalltextanddetailedgraphics
can be clearly read or seen.
• Useacommerciallyavailabledistributionampliertoboththeprimary(upper)andthesecondary(lower)projectorstodistribute
signal to two outputs of the two projectors.
• Notesforstacking
- Askyourservicepersonforsettingupandadjustingprojectors.
- Setuptheprojectorsinaplaceorstructureinawaywithsufcientstrengthtosupportthecombinedweightofthetwoprojec-
tors.Thesingleprojectorwithalensweighsuptoapproximately21kg/47lbs.
- Topreventtheprojectorsfromfalling,fastentheminawaytowithstandearthquakes.
- Doublestackingwillcauseroomtemperaturetoincrease.Ventilatetheroomwell.
- Donotattempttostackprojectorsontheceiling.Gravitystackingcannotbedoneontheceiling.
- Warmuptheprojectorsforonehourbeforethedesiredprojectionisobtained.
- Makesurethatthepositionoftheupperprojectordoesnotexceeditsspecications.Whensettingupthetwoprojectors,
adjustable height range for the tilt feet on the upper projector is added to the total adjustable range.
- Setuptheprojectorssothattheprojectedimageshowsaslittlegeometricdistortionsaspossible.Thelensisdifferentin
geometricdistortionbetweenwide(+)andtele(−)forzoom.
- Adjustthehorizontallensshifttothelenscenter.
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