Epson Powerlite 755c Multimedia Projector Users Guide

							Fine-Tuning the Projector111
■Brightness 
Lightens or darkens the overall image.
■Contrast
Adjusts the difference between light and dark areas. 
■Color Intensity (video only)
Adjusts the color depth of the image.
■Tint (video only)
Adjusts the balance of green to magenta in the image 
(available only for component video or NTSC signals).
■Sharpness
Adjusts the sharpness of the image.
■Color Adjustment
Adjusts the color temperature. Select Color Temp. to set a 
temperature between 5000 and 10000 °K. Or select 
RGB to 
adjust individual red, green, and blue values. (Not available if 
sRGB is selected as the Color Mode setting.)
Adjusting Signal Settings 
Although the projector normally detects and optimizes the input 
signal automatically, you can use the Signal menu to make manual 
adjustments. In addition to changing the position of the projected 
image, you can correct tracking and sync for computer images, or 
change the aspect ratio to widescreen format for video images. 
1. Press the 
Menu button and select the Signal menu. 
You see a screen similar to one of those below. (The settings will 
be different depending on the source you are projecting from.)
note
The Brightness setting 
changes the opacity of the 
projector’s LCD panels. You 
can also change the lamp’s 
brightness. Select 
Brightness Control in the 
Setting menu, then choose 
High or Low (the default 
setting is High).
note
You can also use the remote 
control’s 
Auto button to 
automatically reset the 
projector’s tracking, sync, 
resolution, and position 
settings. See page 26 for 
details.
Computer/RGB Video
Component Video Composite Video/S-Video 
						

							112Fine-Tuning the Projector2. Use the  pointer button to highlight the desired option, then 
adjust it as needed:
■Auto Setup 
Leave this setting 
ON to automatically optimize the computer 
image. Turn it off if you want to save adjustments you have 
made to the video settings.
■Tracking 
Adjust this value to eliminate vertical stripes in the image.
■Sync
Adjust this value if the image appears blurry or flickers.
■Progressive
Turn this setting ON to convert composite video signals into 
progressive signals (best for still images). Leave the setting 
OFF for moving images.
■Position
If the image is slightly cut off on one or more sides, it may not 
be centered exactly. Select this setting and use the  pointer 
button to center it.
■Computer Input
If the colors don’t look right on the Auto setting, select the 
setting for the type of equipment you’ve connected to the 
Computer/Component Video port:
RGB: For a computer connection.
Component Video: For a video player that outputs a 
component video signal. 
■Video Signal 
Leave this setting at 
Auto unless you are using a 60-Hz PAL 
system (then select 
PAL60).
tip
Before adjusting tracking or 
sync, fill the screen with an 
image containing fine 
detail. For example, in 
Windows you can select a 
pattern to appear as your 
desktop background. If this 
option isn’t available, try 
projecting black text on a 
white background. 
						

							Fine-Tuning the Projector113
Customizing Projector Features
You can use the Settings menu to lock the buttons on the projector, 
adjust audio volume, and customize several other features.
■Keystone 
Squares up the shape of the image after the projector has been 
tilted upward. If you notice lines or edges looking jagged after 
adjusting the shape, decrease the Sharpness setting (see page 110). 
■Auto Keystone
Automatically compensates for keystone distortion when the 
projector is tilted upward. This feature is available only when the 
projector is set for front projection (and enabled by default).
■Operation Lock
Lets you disable all of the buttons on the projector except the 
Power button. See page 119 for more information.
■Pointer Shape
Lets you choose from three alternative pointer shapes. See page 36 
for more information.
■Brightness Control
Lets you select from two levels of brightness. The Low setting 
reduces power consumption and noise, and extends the lamp’s 
operating life. 
						

							114Fine-Tuning the Projector
■Volume
Raises or lowers the volume of the projector’s speaker.
■EasyMP Audio Out
Lets you output sound from EasyMP scenarios (.wav files) or 
MPEG files to external speakers with built-in amplifiers. Connect 
the speakers as shown on page 48.
Using the Projector Security Features
To prevent unauthorized use of the projector, you can do the 
following:
■Assign a password; this can be disabled for a set period if you want 
to loan the projector to someone. 
■Create an identifying user logo that is displayed at startup and/or 
when the 
A/V Mute button is pressed. See page 117.
■Disable the projector’s buttons; this is useful, for example, if 
you’re projecting in a classroom and you want to ensure that no 
one touches the projector’s buttons while you’re using the remote 
control. See page 119. 
If you create a user’s logo for the projector, you can set up the logo so 
it is displayed as the startup screen and/or AV/Mute screen. 
Unauthorized users cannot turn it off or change it. This feature is 
intended to discourage theft and provides a way to identify the 
projector should it be stolen. 
Enabling Password Protection
To prevent unauthorized use, you can assign the projector a password. 
If you do, a screen will appear requesting the password whenever the 
projector is plugged in and turned on. If an incorrect password is 
entered three times in succession, the projector’s operation is locked 
and the power cord must be disconnected and reinserted to redisplay 
the password screen. If an incorrect password is entered thirty times in 
succession, the user must contact Epson to unlock the projector. 
note
You can also adjust the 
volume using the remote 
control.
note
It’s a good idea to write 
down your password. 
If you leave the projector 
plugged in, the Password 
Protect Release screen will 
not appear. You only need a 
password if you unplug and 
reconnect the power cable. 
						

							Fine-Tuning the Projector115
The default setting for the Password Protect function is OFF. Follow 
these steps to turn password protection on:
1. Press the 
Freeze button on the remote control for about five 
seconds.
You see this screen:
2. Use the   pointer button to set 
Power ON Protect to ON. 
Then press 
Enter.
3. Press 
Esc.
4. Select Password and press Enter.
5. When you see a message asking if you want to change the 
password, select 
Yes and press Enter.
6. Hold down the 
Num button on the remote control and use the 
numeric keypad to enter a four digit password. (The default 
setting is 0000.) 
7. When you see a confirmation message, reenter the password. 
Then press the 
Menu button to exit the screen.
8. Press the 
Num button on the remote control to deactivate the 
numeric keypad.
9. If you want to disable the password temporarily, select 
Timer and 
press 
Enter. Then hold down the Num button while you use the 
numeric keypad to enter the number of hours (from 0 to 9999) 
that you want the password feature disabled. If you want the 
projector to request the password every time it is turned on, set 
the timer to 
0H. 
caution
If you lose the remote 
control, you will not be able 
to enter the password. Keep 
the remote control in a safe 
place at all times. 
						

							116Fine-Tuning the ProjectorThe countdown for the elapsed time begins as soon as you close 
the Password Protect menu. (You can check the elapsed time in 
this menu next to 
Time elapsed.)
10. To enable your screen logo, select 
User’s Logo Protect and press 
Enter. Select ON and press Enter. 
When this feature is on, the logo appears whenever you turn on 
the projector (if the 
Startup Screen is enabled in the Extended 
menu; see page 117). It also appears when you press the A/V 
Mute button (if you selected the 
Logo as the Background Color 
in the Extended menu). None of the User’s Logo features in the 
Extended menu can be changed when the User’s Logo Protect 
function is enabled.
Starting the Projector with a Password
When the password function is enabled, you see this screen when you 
plug in and turn on the projector:
Hold down the 
Num button on the remote control and use the 
numeric keypad to enter the four digit password.
The password screen closes, the numeric keypad is automatically 
deactivated, and projection begins.
If the password is not correct, you see the message 
Wrong password. 
Please try again.
 If you enter an incorrect password three times in 
succession, you see the message 
The projector’s operation will be 
locked. Request code xxxxx
 and the projector switches to standby 
mode for approximately 5 minutes. Write down the request code. 
Then disconnect the projector’s power cord from the electrical outlet, 
reconnect it, and turn the projector back on.  
						

							Fine-Tuning the Projector117
When you see the Password Protect Release screen again, you can try 
to enter the correct password.
If you enter an incorrect password 30 times in succession, the 
projector remains locked and you must contact Epson to unlock it. 
If you have forgotten the password, contact Epson with the request 
code number that appears in the Password Protect Release screen for 
assistance. See “Where To Get Help” on page 166.
Creating Your Own Startup Screen
You can transfer any image from your computer or video source to the 
projector and then use it as your startup screen. You can also use it as 
the screen displayed when the projector is not receiving a signal or 
when you press the 
A/V Mute button. The image can be a company 
logo, slogan, photograph, or any other image you want to use. 
Capturing the Image
Start by displaying the image you want to use from either a computer 
or video source, such as a DVD player or digital camera. Then follow 
these steps to capture the image and transfer it to the projector: 
1. Press the 
Menu button on the remote control, highlight the 
Extended menu, and press Enter.
2. Highlight 
User’s Logo and press Enter.  
						

							118Fine-Tuning the Projector3. When you see a message asking whether you accept the present 
image as the user’s logo, select 
Yes and press Enter. A selection 
box displays over the image. 
4. Use the  pointer button to select the area of the image you 
want to use. Then press 
Enter.
5. When you see the message 
Select this Image?, highlight Yes 
and press 
Enter. 
6. Use the arrow buttons to select a zoom rate (display size) and press 
Enter.
7. When the message 
Save image as user’s logo? appears, select 
Yes and press Enter. Saving the logo may take a few moments. 
Do not use your projector, remote control, or video source while 
the logo is being saved.
8. When you see the message 
Completed, press Esc to return to the 
menu screen. 
Choosing When to Display the Image 
After your image is saved, it is automatically set as the startup screen. 
You can also set it to display as the screen you see when there’s no 
signal or when you press the 
A/V Mute button (see page 32).
1. Press the 
Menu button, highlight the Extended menu, and press 
Enter. 
2. Select 
Display and press Enter.
3. Highlight 
Background Color and press Enter. 
4. Select 
Logo and press Enter.
5. When you’re finished, press Esc to exit. 
						

							Fine-Tuning the Projector119
Disabling the Projector’s Buttons
When you enable the Operation Lock function, you can lock all the 
projector’s buttons except the 
Power button.
1. Press the 
Menu button, highlight the Setting menu, and press 
Enter.
2. Select 
Operation Lock and press the Enter button.
3. Select 
ON and press Enter.
4. Select 
Yes and press Enter to confirm the setting.
5. Press the 
Menu button to exit. 
Customizing Power and Operation
You can use the Extended menu to customize the way the projector 
displays images, enable quick startup, turn sleep mode on or off, and 
customize other projector operations.
■Display
Use this setting to turn off the display of messages, change the 
background color, enable logo display, or turn off the startup 
screen display.
■User’s Logo
Create a custom startup screen, as described on page 117. 
						

							120Fine-Tuning the Projector
■Projection 
Select Front (to project from the front of a screen and right side 
up), 
Front/Ceiling (when the projector is mounted upside-down 
from the ceiling), 
Rear (to project from behind onto a 
transparent screen), or 
Rear/Ceiling (to project from behind onto 
a transparent screen when the projector is mounted upside-down 
from the ceiling). 
When you select one of the Ceiling projection methods, the 
projector requires a 10-second cool-down after you turn it off. 
You need to wait until you hear the projector beep before 
unplugging it.
■Operation
Enable Direct Power ON if you want to have the projector start 
when the power cable is connected (without pressing the
 Power 
button). Enable Sleep Mode if you want to have the projector 
turn off automatically if it is idle (and no signal is received) for 30 
minutes.
■Standby Mode
Select Network ON to enable the projector to be monitored over 
a network when it is in standby mode (the power light is orange). 
■Link 21L
Enable this setting if you want to be able to control the projector 
from a USB-connected computer. 
■Language 
Select from nine languages to be used for the projector menus.
note
If Direct Power ON is 
enabled, the power cable is 
connected, and a power 
outage occurs, the projector 
will start when the power is 
restored.