InFocus Projector Lp755 User Manual

							30
Using the Projector
NOTE: The Manual Sync,
Manual Tracking, Horiz.
Position and Ve r t .  P o s i t i o n
options are available only for
computer sources. The projector
sets these options automatically
for a video source.Manual Tracking
The projector adjusts tracking automatically to match the video 
signal from your computer. However, if the display shows evenly 
spaced, fuzzy, vertical lines or if the projected image is too wide 
or too narrow for the screen, try turning 
Auto Image off then back 
on again. If the image is still bad, try adjusting the tracking man-
ually:
1Turn Auto Image off.
2Highlight Manual tracking, then press either mouse button 
repeatedly until the fuzzy vertical bars are gone.
Horizontal position
Follow these steps to manually adjust the horizontal position:
1Turn Auto Image off.
2Highlight Horizontal position, then press the left mouse but-
ton to move the image right or press the right mouse button to 
move the image left.
Positioning adjustments are saved when you power off the pro-
jector.
Ve r t i c a l  p o s i t i o n
Follow these steps to manually adjust the vertical position.
1Turn Auto Image off.
2Highlight Vertical position, then press the left mouse button to 
move the image down or press the right mouse button to 
move the image up.
NOTE: The Zoom feature is only
available when a computer source
is active. It is not available for
video sources.ZoomThis option allows you to digitally zoom the image. Highlight 
Zoom, then press either mouse button. A rectangle appears on 
the screen. Use the arrow buttons on the keypad or the disk 
mouse on the remote to move the rectangle to the area you want 
to zoom, then click the right mouse button (not the left mouse 
button). The image is zoomed. To zoom further, press the right 
mouse button, move the rectangle to the desired area, then press 
the right mouse button again. You can zoom three times. To 
return the image to normal view, press the left mouse button. The 
zoom rectangle appears. To cancel zoom, activate any menu. 
						

							31
Controls Menu 
 
FIGURE 24
Controls menu
Video Standard
NOTE: If you already know the 
video standard used in your geo-
graphical area, it’s often best to 
manually select it.
When Video standard is set to Auto, the projector attempts to 
pick the video standard (NTSC, NTSC 4.43, PAL, PAL-M, PAL-N, 
or SECAM) automatically based on the input signal it receives. 
(The video standard options may vary depending on your region 
of the world.) The input signals for SECAM, PAL-M, and PAL-N 
video cannot be automatically detected, therefore they must be 
chosen manually. If the projector is unable to detect the correct 
standard, the colors might not look right or the image might 
appear “torn.” If this happens, manually select a standard by 
clicking either mouse button and cycling through the standards.
Standby Time
This option lets you select how long the lamp stays on and the 
blank screen is displayed when the projector enters standby 
mode before the projector turns off. Select among 1, 5, 10, and 15 
minutes and 1 and 2 hours by clicking either mouse button and 
cycling through the options. 
						

							32
Using the Projector
Ceiling Projection
NOTE: To order the LP755
Ceiling Mount, refer to “Optional
Accessories” on page 52.
When you turn Ceiling Projection on, the projector turns the 
image upside down for ceiling-mounted projection. Highlight 
Ceiling Projection, then click either mouse button to select turn 
this feature on and off.
Rear Projection
When you turn Rear Projection on, the projector reverses the 
image so you can project from behind a translucent screen. High-
light Rear Projection, then click either mouse button to select turn 
this feature on and off.
Default Source
Default Source toggles between Computer 1, Computer 2, and 
Video. This determines which source the projector checks first for 
active video during power-up. Highlight Default Source and 
click either mouse button to toggle between the options.
Auto Source Select
This setting toggles between On and Off. When this feature is Off, 
the projector defaults to the source selected in Default Source. To 
display another source, you must manually select one by press-
ing the 
comp or video button on the keypad or remote. When this 
feature is On, the projector automatically finds the active source, 
checking the default source first. Highlight Auto Source Select 
and click either mouse button to turn this feature on and off.
Plug and Play
This setting toggles between On and Off. When it is On, most 
new computers will automatically recognize the LP755, then set 
the monitor resolution and refresh rate accordingly. You need to 
set the Plug and Play setting to Off for the LP755 to display prop-
erly on some older computers. The Plug and Play setting does not 
affect video images. If the LP755 display constantly changes 
between the computer image and the message, Perfecting the 
image, you may need to set Plug and Play to Off. 
						

							33
Display Messages
This setting toggles between On and Off. When this feature is On, 
status messages such as “No signal detected” or “Standby” 
appear in the lower-right corner of the screen. Click either mouse 
button to turn this feature off and not see status messages.
Display Startup Screen
This setting toggles between On and Off. When this feature is On, 
the InFocus startup screen appears when the projector starts up 
and remains until an active source is detected. The startup screen 
contains information on contacting InFocus. Click either mouse 
button to turn this feature off and display a plain black or blue 
screen instead of the startup screen. 
Auto startup
This setting toggles between On and Off. When this feature is On, 
the lamp turns on automatically when you power on the 
projector. (This is especially useful in ceiling-mounted 
installations.) When it is Off, you must press the Power button on 
remote or keypad to turn the lamp on. 
Document Camera
This feature improves the quality of images generated by docu-
ment cameras. Only enable this feature if you are using a docu-
ment camera. 
						

							34
Using the Projector
Language Menu
FIGURE 25
Language menu
You can display the on-screen menus in English, French, German, 
and Spanish. 
•Move the cursor to the language you want, then click either 
mouse button. The menus redraw immediately.
Status Menu
This is a read-only menu for informational purposes. To display 
the status window, select Show status from the menu, then click 
either mouse button. To remove the window, click either mouse 
button.
FIGURE 26
Status menu 
						

							35
Lamp hours used
Indicates how many hours the current lamp has been in use. The 
counter starts at zero hours and counts each hour the lamp is in 
use. When the counter reaches 3000 hours, the lamp monitor light 
on the projector ’s keypad turns on. For optimum results, the 
lamp should be replaced at this time. See “Replacing the Projec-
tion Lamp” on page 39 for details.
Computer resolution 
Shows your computer ’s resolution setting. To change this, go to 
your computer ’s Control Panel and adjust the resolution in the 
Display tab. See your computer ’s user ’s guide for details.
Horizontal refresh rate
The time period that one horizontal line is displayed.
Ve r t i c a l  r e f r e s h  r a t e
The time period that one video frame is displayed.
Mute status
Indicates if the audio is muted.
Software version
Indicates the projector ’s software version. This information is 
useful when contacting Technical Support.
CableWizard version
Indicates the CableWizard’s software version. This information is 
useful when contacting Technical Support.
Source
Indicates the active source, Computer 1 (CableWizard), 
Computer 2 (VESA input) or Video.
Speakers
Indicates if external speakers are connected.
Help menu
This menu contains information on connecting your projector, 
activating your laptop’s external video, and troubleshooting your 
projector. Highlight the desired topic, then press either mouse 
button to display the information. 
						

							MAINTENANCE
AND
TROUBLESHOOTING
3821-LP755 COV/DIV ENG  9/9/99  4:55 PM  Page 6 
						

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MAINTENANCE & TROUBLESHOOTING
This section describes how to:
•clean the lens
•clean the fan intake filter
•replace the projection lamp 
•replace the batteries in the remote control
•use the Kensington lock feature
•troubleshoot the projector
Cleaning the Lens
Follow these steps to clean the projection lens:
1Apply a non-abrasive camera lens cleaner to a soft, dry cloth.
•Avoid using an excessive amount of cleaner and applying 
the cleaner directly to the lens.
•Abrasive cleaners, solvents or other harsh chemicals might 
scratch the lens.
2Lightly wipe the cleaning cloth over the lens.
3If you don’t intend to use the projector immediately, replace 
the lens cap.
Cleaning the Fan Intake Filter
The fan intake filter on the bottom of the projector catches dust 
and particles in the air. If the filter becomes clogged, the projector 
does not cool properly and may malfunction. To prevent this, 
clean the filter after every 100 hours of use.
1Turn off the projector and unplug the power cord.
2Remove the lamp door. 
•Remove the screw on the outside of the lamp door 
(Figure 27).
•Pull the lamp door up and remove it. 
						

							38
Maintenance & Troubleshooting
F
IGURE 27
Removing the lamp and filter doors
3Using a screwdriver or your hand, push the tab on the filter 
door forward and lift the door out.
4Clean the filter.
•Use a vacuum cleaner set on low power to remove the dust 
and dirt.
FIGURE 28
Cleaning the air filter
5Replace the filter.
•First, insert the side with the tabs, then press the other end 
in place. 
						

							39
Replacing the Projection Lamp
WARNING: To avoid burns, 
allow the projector to cool for at 
least 30 minutes before you open 
the lamp module door. Never 
extract the lamp module while the 
lamp is operating.
The lamp hour counter in the Status menu counts the number of 
hours the lamp has been in use. After 3000 hours of use, the lamp 
monitor LED, marked   on the top of the projector near the 
keypad, lights yellow. For optimum results, the lamp should be 
replaced at this time. You can order new lamp modules from your 
InFocus dealer. See “Accessories” on page 51 for information.
Follow these steps to replace the projection lamp:
1Turn off the projector and unplug the power cord. 
2Wait 30 minutes to allow it to cool thoroughly.
3Using a small, flat-blade screwdriver, loosen the screw on the 
outside of the lamp door (Figure 29).
4Pull the lamp door up and remove it.
FIGURE 29
Removing the lamp module door
5Loosen the two non-removable screws on the outside of the 
module (Figure 30).
6Remove the module by grasping its handle and pulling it out 
of the projector (Figure 30).