Epson EPL7250 Product Information Guide - Page 3

EPSON PowerLite 5350/7250/7350 Projector Computer 1 and 2 and Computer Out Connector Pin Assignments The Computer 1 and 2 and Computer Out connectors are female video RGB, 15-pin micro-D-style connectors. The pin assignments are: Input pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Computer Out connector signals Red out / red video Green out / green video Blue out / blue video Reserved GND GND GND GND Reserved GND Reserved Reserved Horizontal sync Vertical sync Vertical sync Computer 1 and 2 connector signals Red video Green video Blue video Monitor (ID bit 2) GND Red video GND Green video GND Blue video GND +5 V Synchronous GND Monitor (ID bit 0) SDA Horizontal sync Vertical sync Reserved Projector Placement Guidelines To get the best results when projecting your images, it is important to position the projector at the proper height and distance relative to the screen. When projecting from a table or desk, place the projector so the lens is aligned as closely as possible with the bottom of your screen: When projecting from the ceiling, align the lens as closely as possible with the top of your screen: Calculating Image Size and Projection Distance The distance between the projector and the screen determines the image size. To determine the exact distance required for a particular image size (or to determine the size of an image at a particular distance), use the following formulas for the standard, long throw, and fixed wide angle lenses. (The size of the image can also be changed by rotating the zoom ring.) Standard Lens Calculations To determine the minimum and maximum diagonal size of an image when you know the projection distance: t Inches: Maximum diagonal size = (0.6124 × projection distance) + 1.5264 Minimum diagonal size = (0.4556 × projection distance) + 1.1410 t Centimeters: Maximum diagonal size = (0.6124 × projection distance) + 3.8771 Minimum diagonal size = (0.4556 × projection distance) + 2.8981 To determine the projection distance when you know the diagonal size of the screen image: t Inches: Maximum projection distance = (2.1949 × diagonal size) − 2.5044 Minimum projection distance = (1.6328 × diagonal size) − 2.4923 t Centimeters: Maximum projection distance = (2.1949 × diagonal size) − 6.3612 Minimum projection distance = (1.6328 × diagonal size) − 6.3304 For example, here are the measurements for three installations: Image size (diagonal) 300 inches* (762 cm) 200 inches (508 cm) 100 inches (254 cm) Horizontal distance from projector to screen Minimum Maximum 487.3 inches (12.4 m) 656.0 inches (16.7 m) 324.1 inches (8.2 m) 436.5 inches (11.1 m) 160.8 inches (4.1 m) 217.1 inches (5.5 m) * For an image size of 300 inches, the projector may be up to 54 feet away from the screen, depending on the setting of the zoom ring. 8/99 EPSON PowerLite 5350/7250/7350 Projector - 3