Epson Powerlite 7500c Multimedia Projector Users Guide

							2    Using the Projector             42
If computer or video equipment is attached, the computer or video 
signal is projected. Allow about 30 seconds for full illumination.
✦
Warning: Never look into the lens when the lamp is on. This can 
damage your eyes. It is especially important that children not look 
into the lens.
When you want to stop projecting images, press the Power button 
again. The fan remains on and the power light flashes orange for 
about two minutes as the projector cools down. 
   
When the projector has cooled down, the power light stops flashing 
and remains orange. 
To turn off the projector completely, turn off the main power switch 
at the rear of the projector after the power light becomes orange.
Note: If you press the Power
 button to turn the projector back on 
while the power light is orange, there may be a delay before a 
projected image appears.
power light
temperature lightprojection lamp light
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							Positioning the Projector
43
Sleep Mode
Sleep mode conserves electricity by automatically turning off the 
lamp after the projector has not been used for 30 minutes. In sleep 
mode, the projector’s power light is orange and only a minimum 
amount of the projector’s circuitry remains on. This conserves 
electricity, cools the projector, and extends the life of the lamp. 
When the projector is in sleep mode, press the Power button to 
resume projecting images, or unplug the projector’s power cord to 
turn it off.
Positioning the Projector
Your projector supports front, rear, and ceiling projection, allowing 
you to choose the best method for displaying your images. 
If you use rear or ceiling projection, you need to select a special 
mode in the projector’s Setting menu. See page 67 for more 
information. 
To get the best results, it’s important to position the projector at the 
proper height and distance relative to the screen.
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							2    Using the Projector             44
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:
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							Positioning the Projector
45
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 
actual 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 formulas given below. (Remember that 
the size of the image can also be changed by rotating the zoom ring; 
see page 47 for more information.)
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							2    Using the Projector             46
To determine the minimum and maximum diagonal size of an image 
when you know the projection distance:
Inches:
Maximum diagonal size = (0.6038 × projection distance) + 
1.8898
Minimum diagonal size = (0.4631 × projection distance) + 
1.4000

Centimeters:
Maximum diagonal size = (0.6038 × projection distance) + 
4.8001
Minimum diagonal size = (0.4631 × projection distance) + 
3.5560
To determine the projection distance when you know the diagonal 
size of the screen image:

Inches:
Maximum projection distance = (2.1593 × diagonal size) - 
3.0229
Minimum projection distance = (1.6562 × diagonal size) - 
3.1291

Centimeters:
Maximum projection distance = (2.1593 × diagonal size) - 
7.6782
Minimum projection distance = (1.6562 × diagonal size) - 
4.2068
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							Positioning the Projector
47
For example, here are the measurements for three installations:* For an image size of 300 inches, the projector may be up to 53.7 feet
 away from the 
screen, depending on the setting of the zoom ring. Image size (diagonal)Horizontal distance from projector to screen
Minimum Maximum
300 inches* (762 cm) 493.7 inches (12.6 m) 644.8 inches (16.4 m)
200 inches (508 cm) 328.1 inches (8.4 m) 428.8 inches (10.9 m)
100 inches (254 cm) 162.5 inches (4.2 m) 212.9 inches (5.4 m)
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							2    Using the Projector             48
Focusing and Positioning the Screen Image   
When an image appears on screen, check that it is in focus and 
correctly positioned on the screen. 
  

To focus the image, rotate the focus ring (the front ring on the 
lens). 

To adjust the size of the image, rotate the zoom ring (the rear 
ring). Rotate the zoom ring clockwise to make the screen image 
larger or counterclockwise to make it smaller. 
zoom ring
focus ring
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							Focusing and Positioning the Screen Image
49
If you need to raise or lower the image on the screen, extend or 
retract the foot at the bottom front of the projector as follows:
1. Stand behind the projector and support the front of it while you 
lift the blue foot adjust levers above the adjustable foot. This 
unlocks the foot so it can move up and down. Be careful not to 
drop the projector.
✦
Caution: Don’t hold or lift the projector by its lens. This can 
damage 
the lens.
2. While lifting the foot adjust levers, raise or lower the projector 
until the screen image is correctly positioned.
3. Release the levers to lock the foot in its new position.
rear feet (left   foot not visible)adjustable foot
foot adjust levers
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							2    Using the Projector             50
4. If the projector is not on a level surface, level the projector by 
turning one of its rear feet to adjust its height.   
Resize Button 
The Resize button lets you select the projection method for certain 
types of image signals input from a computer.
PowerLite 7500C:
With images up to XGA size (1024
 × 768), you can choose from two 
projection methods. You can either display the image in the center 
of the projection area or display the image full size. You can also 
choose from two projection methods with images greater than XGA 
size: either project a portion of the image or project the entire image 
in a compressed format. The projector automatically reduces the 
image size to the projector’s maximum resolution. The Resize 
button cannot be used with images at XGA resolution.
PowerLite 5500C:
With images up to SVGA (800 
× 600 pixels), you can either project 
a portion of the image or project the entire image in a compressed 
format. The projector automatically reduces the image size to the 
projector’s maximum resolution. The Resize button cannot be used 
with SVGA.
There is a Resize button on both the control panel and the remote 
control. Press the Resize button to cycle between the choices 
described above.
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							Controlling the Projector
51
Controlling the Projector
You can use the control panel on top of the projector or the remote 
control to perform the following actions: 
Turn power on or off 

Access the help function (image and sound)

Switch between input sources (video or computer)

Access the projector menus to adjust the image, audio, video, 
and display settings

Control resizing

Control display freeze (remote control only)

Control A/V mute (cuts off the image and sound temporarily)

Adjust or mute audio output

Use custom functions (remote control only)

Use effects functions (for enhancing projected images on the 
screen; remote control only)
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