Epson Powerlite 7550c Users Guide

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Follow these steps to change projector settings: 
1. Click Projector Control on the Projector Setting dialog box. The 
following dialog box appears:
2. Click the tab for the settings you want to adjust. See the tables 
on the following pages for explanations of the different settings.
3. Make the changes you want, then click another tab if you want 
to make more changes. (To return to the default settings on a 
tab, click Reset.) When you’re done, click Close. 
						

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Video tab (video source is a computer)
If the image source on your projector is set to Computer, you see the 
following options on the Video tab: Option Description
Brightness Adjusts screen brightness. Increase brightness to lighten an image, or 
decrease it to darken the image.
Contrast Adjusts the difference between light and dark areas. Increase the 
contrast to make light areas lighter and dark areas darker. Decrease it to 
minimize the difference between light and dark areas. 
Sync. Synchronizes with the tracking signal sent from the computer. Adjust 
this setting to correct fuzziness or screen flicker.
Tracking Matches the projector’s internal clock to various computer graphic 
signals. Adjust this setting to remove vertical lines from the image.
Color Adjusts the balance of red, green, and blue in the image.
Position  Adjusts the horizontal and vertical screen position.
Auto 
Set UpWhen enabled, this setting allows the projector to sense the graphic 
signal being sent from the computer and optimize it for the projector. If 
the projector doesn’t automatically recognize the video source, select a 
different signal through your computer. 
Pattern 
DisplayEnables or disables display of the test pattern currently selected.
Reset Resets all settings to their default values. 
						

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Video tab (video source other than a computer)
If the image source on your projector is set to Video, you see the 
following options on the Video tab:
 
Audio tab
The Audio tab lets you make the following adjustments: Option Description
Brightness Adjusts screen brightness. Increase brightness to lighten an image, or 
decrease it to darken the image.
Contrast Adjusts the difference between light and dark areas on the screen. 
Increase the contrast to make light areas lighter and dark areas darker. 
Decrease it to minimize the difference between light and dark areas. 
Color Adjusts the color density. Increase the setting for darker and more 
opaque colors. Decrease it for lighter and less opaque colors.
Tint 
(NTSC only)Adjusts the red-green color balance of the screen. Increase tint to add 
more green, or decrease it to add more red. This setting only works with 
NTSC video signals.
Sharpness Adjusts the sharpness of the screen image.
Pattern 
DisplayEnables or disables display of the test pattern currently selected.
Reset Resets all settings to their default values.
Option Description
Volume Adjusts sound volume for the speakers and audio-out terminal.  
						

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Treble Adjusts the treble tone of the speakers. 
Bass Adjusts the bass tone of the speakers. 
SRS SPACE Adjusts stereo sound. Increasing the value increases the stereo sound 
separation.
SRS 
CENTERAdjusts stereo sound. Changing the value balances the SRS sound.
Pattern 
DisplayEnables or disables display of the test pattern currently selected.
Reset Resets all settings to their default values. Option Description 
						

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Setting tab
The Setting tab enables you to adjust basic projector settings. Option Description
Blank 
(AV/MUTE)Specifies whether a black screen, a blue screen, or a user-defined logo 
displays when the screen is blanked.
Install Specifies how the projector is installed (if you are not using front 
projection):
Rear Proj  Use this setting when projecting to the back of a screen so 
the image is flipped left to right.
Ceiling  Use this setting when the projector is installed on the ceiling 
so the image is flipped top to bottom.
Prompt Temporarily displays a prompt on the projector screen identifying 
which source (computer or video) is providing the image.Color Temp
Adjusts the whiteness of the screen. Positive color temperature values 
provide a cold white; negative values provide a warmer white. Press the 
right arrow button on the control panel or press right on the remote’s 
pointer button to increase the color temperature value; press the control 
panel’s left arrow button or left on the remote’s pointer button to 
decrease the color temperature value.
Mode Specifies the input image signal mode: AUTO, NTSC, NTSC 4.43, 
PAL, PAL N, PAL M, PAL 60 or SECAM.
Pattern 
DisplayEnables or disables display of the test pattern currently selected.
Reset Resets all settings to their default values. 
						

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Testing Projector Performance
You can use the Test Pattern dialog box to test your projector’s 
focus, resolution, color fidelity, and grayscale quality. Each of the 
test patterns on the dialog box tests a different aspect of projector 
performance. 
1. Click Test Pattern on the Projector Setting dialog box. The 
following dialog box appears: 
						

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2. Choose one of the following:  
Color Image Displays a color bar test pattern to verify 
color accuracy.
Gray Scale Displays a grayscale test pattern.
Focus Pattern  Displays a character-based focus pattern.
User File (bmp) Displays a blow-up of the bitmap file you 
specify. Either type the name of the bitmap 
file you want to use, or click Ref...
 (refer) to 
browse your hard disk for the file. The 
bitmap should be 800
×600 pixels. Use this 
pattern to test image resolution.
3. Check Pattern Display 
to display the test pattern selected. 
4. When you’re finished, click Close to end the test and return to 
the Projector Setting dialog box. 
						

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Creating a User Logo
You can create or edit a logo from the Projector Setting dialog box, 
then save it to a file on your hard disk or download it to the projector 
when you want to use it with a presentation.
1. Click User’s Logo on the Projector Setting dialog box. The 
User’s Logo Setting dialog box appears. 
						

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2. Click the Edit button. The following dialog box appears.
3. Click the Open the File icon to locate and open a bitmap or logo 
(.lgo) file. The selected image appears in the display area.
Note: If you see a screen requesting the image type, select the 
correct image type.
4. To crop the image, click the Select Area button and position the 
pointer at one corner of the area to be the logo. Click the bottom 
multi-purpose button, move the pointer to the opposite corner, 
and then click it again. Click OK to accept the changes. The 
User’s Logo Setting dialog box reappears.
5. To increase or decrease the size at which the logo displays, 
select a zoom percentage from the Zoom list box. 
						

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6. Click the Save button to save your logo to your hard disk. The 
Save As dialog box appears. Type a name for your logo, using 
the .lgo extension, then click OK.
Note: You must save logo files with the extension .lgo.
7. To download a logo file to the projector, click the Download 
button and follow the instructions on the screen.
8. Click Close to return to the Projector Setting dialog box.
Bringing out detail in your projected image 
If much of your image appears hidden in shadow, you can increase 
visible detail by gamma correction, which brings out the midtones 
in the image. This correction often achieves better results than 
simply correcting contrast or brightness from the Video tab. 
1. Click Gamma on the Projector Setting dialog box. The Gamma 
Setting dialog box appears: