Chapter 2 Getting Started — Setting upENGLISH - 39r Fixed-focus Lens (Model No.: ET-D75LE95, ET-D75LE90)SHSWSDSHA1L3L4A2L1L2SWProjected imageScreenScreen(Unit: m)SH Projected image heightSW Projected image widthSD Projected image sizeL1 Projection distance (from the screen to the mirror reflection surface*1 )L2 Distance between the projector and the screen (from the screen to the tip of the lens)L3 Distance between the projector and the screen (from the screen to the front surface of the projector)L4 Distance between the projector and the screen (from the screen to the rear surface of the projector)A1 Distance between the projector and the screen (from the screen bottom edge to the projector top)A2 Distance between the projector and the screen (from the screen bottom edge to the projector bottom)*1 The mirror reflection surface cannot be seen from the outside, because it is located inside the Fixed‑focus Lens.(Unit: m)Distance between projectorand screenFormulaET-D75LE95 ET-D75LE90L2 = L1*1 + 0.029 = L1*1 + 0.029L3 = L1*1 - 0.292 = L1*1 - 0.277L4 = L1*1 - 1.017 = L1*1 - 1.002A2 = A1*1 + 0.324 = A1*1 + 0.324*1 For details of calculating values, refer to “Formula for calculating the projection distance per projection lens” (x page 47).Attentionf Before setting up, read “Precautions for use” (x page 19).Especially when the Fixed‑focus Lens (Model No.:ET‑D75LE95, ET‑D75LE90) is used, install the projector so that its back plane is parallelto the screen, making the projected image rectangular.The vertical keystone distortion in moderate range can be corrected with the [POSITION] menu → [GEOMETRY] → [KEYSTONE] →[VERTICAL KEYSTONE] (x page 101) even after the projector is installed. For the range that can be corrected, refer to “[GEOMETRY]projection range” (x page 40).f Do not use the projector and the high-powered laser equipment in the same room. The DLP chips can be damaged if a laser beam hits theprojection lens surface.f The dimension of L4 is not the distance between the rear of the projector body and the wall, but the distance between the rear of theprojector body and the screen surface. Install the projector with 500 mm (19‑11/16") or larger space between the rear of the projector bodyand the wall or any object so that the ventilation is not obstructed.When installing the projector in a confined space, provide air conditioning or ventilation separately. Exhaust heat may accumulate when theventilation is not enough, triggering the protection circuit of the projector.
