Toshiba Projector Tlp 791 User Manual

							31
Operations
CONTENTSProjection on the screen (continued)
6 7
Notes
(Signal sent from the computer)
•If you project an image from a computer with an LCD screen while monitoring the image on
the computer, the image may not be projected properly, depending on the computer model.
In this case, turn off the computer display. For details on controlling the computer display, etc.,
refer to the computer’s manual and description on the software for the computer used.
•The projector projects an image by XGA signal (1024 x 768) in full screen.
•The image quality from a computer signal other than XGA may be inferior. It is recommended
to set the external monitor connected to the computer to XGA mode (1024 x 768).
•The projector can be also applied to DDC2B (Display Data Channel 2B). If your computer is
applied to the DDC, start up your computer after turning on the projector.
Adjust the picture size by turning the
zooming lever.
Turn to the right to enlarge the picture.
Turn to the left to reduce the picture.
Focus on the picture by turning the
focusing ring.
A still picture is recommended for focusing.
6
7
Continued 
						

							32
Operations
CONTENTS
Notes
•To change the projecting angle, adjust the foot adjuster. 20
•If the screen image suffers keystone distortion, press the KEYSTONE button to adjust the
distortion. 
35
•Due to lamp characteristics, flickers may occasionally occur in a picture. This is not
malfunction of the unit.
•The lamp may rarely burst with a loud sound. A lamp is consumable supplies. If used for
extended periods, images will appear dark, and the lamp could burn out. This is characteristic
of a lamp, and is not malfunction. (The lifetime of the lamp depends on conditions of use.)
•The projector’s liquid crystal panel is made using extremely advanced technology, but there
may be black spots (pixels that do not light) or bright spots (pixels that are constantly lit) on
the panel. Please note that these are not malfunctions.
•When trying to press a button whose operation is not available, the 
 icon appears.
•When supplying the signal not compatible with the projector, the 
 icon appears.
•When signals are not input from the input source, the 
 icon appears.
•The projector may stop operating if the surrounding temperature is too high or if the air filter is
clogged with dust. 
62
Press VOL/ADJ (+/-) to adjust volume.
Press the (+) button to increase volume.
Press the (
-) button to decrease volume.
8
Projection on the screen (continued)
KEYSTONE
AUTOSET
EXIT
ON / STANDBY
VOL / ADJ
ENTER
MENU
INPUT
FANTEMPLAMPON
8
8
MENUON/STANDBY INPUT
L-CLICK R-CLICK
ENTER
KEYSTONEAUTO
SET
EXIT
PIP
FREEZE
MUTE CALLRESIZE
VOLUME/ADJUST
LASER
Remote control
Control panel
(Main unit side)
About the LCD Panel
The life of the LCD panel is limited.
Take care over the points below so as to use the panel for years.
•To prolong the life of this panel, never fail to turn the power off when the panel is not in
use and make sure that the lamp has gone out. The state of the lamp being extinguished
helps enhance the effect of energy saving.
•If the air filter is stained and is clogged up, the main unit inner temperature rises. As a
result, the life of the LCD is shortened and a malfunction may also occur.
Clean the air filter from time to time 
63 and replace it regularly. It is recommended that
this replacement be done at the time of replacing a lamp. (Ask a dealer where the unit
was purchased or your nearby service station about an air filter for replacement.) 
						

							33
Operations
CONTENTSTurning the power off
Press ON/STANDBY after using the projector.
An instruction message for turning the power off appears on
the screen and disappears after a while. When the message
disappears, operation becomes invalid.
Press ON/STANDBY again.
Cooling starts. Once cooling is completed, the LAMP and FAN
indicators turn off and the standby mode is set. (The ON
indicator turns in orange.)
To protect the light source lamp, the LAMP indicator blinks as long as
a minimum of cooling is necessary. The power cannot be turned back
on during this time. Unplugging the power cord at this time will shorten
the lamp’s duration life.
The cooling fan continues to run for a while to expel the heat remaining
inside. If you are in a hurry, however, you may unplug the power cord
at this time.
The standby mode is set.
1
2
KEYSTONE
AUTOSET
EXIT
ON / STANDBY
VOL / ADJ
ENTER
MENU
INPUT
FANTEMPLAMPON
2
1,2
MENUON/STANDBY INPUT
L-CLICK R-CLICK
ENTER
KEYSTONEAUTO
SET
EXIT
PIP
FREEZE
MUTE CALLRESIZE
VOLUME/ADJUST
LASER1,2
(Green)
(Green) (Green)
(Off) (Off) (Off)
Flashing(Orange) (Orange)
ABC
ONLAMP
FA N
ONLAMP
FA N
ONLAMP
FA N(Orange)
ON/STANDBY ON/STANDBY
ON/STANDBY ON/STANDBY
B
C
A
Notes
•The projector consumes about 20W of power in the standby mode. We recommend you
unplug the power cord when not using the projector for long periods of time.
•Be sure that the LAMP indicator has turned off before unplugging the power cord. Cutting the
power by unplugging the power cord while the projector is operating or the light source lamp is
being cooled will shorten the lamp’s duration life. Should a fault or some other irregularity
arise with this unit, unplug the power cord.
•When reinserting the power plug before the lamp has cooled, please wait until the lamp has
cooled sufficiently before use. When the lamp is at a high temperature, it may not light and it’s
life duration will be shortened.
Remote control
Control panel
(Main unit side)
Indicators 
						

							34
Operations
CONTENTS
Notes
•Automatic adjustment may not be performed properly for signals other than those computers’
signals with which the projector is compatible.
•The horizontal position, vertical position, sampling phase and sampling frequency can also be
adjusted from the menu screen 
47.
* Sampling frequency
Analog RGB signals input from the computer are converted into digital signals inside the
projector. The sampling frequency is the number of times per second the analog signals are
converted into digital signals. In order to capture (sample) each individual dot of the
computer’s signals, the sampling frequency must be adjusted to match the computer’s dot
clock frequency. If this adjustment is off, details of the image details may be blurred, a striped
pattern may appear if images with many vertical lines are displayed, or the image’s width may
change. For computer signals with which are projector-compatible, the sampling frequency is
adjusted automatically even when the AUTO SET button is not pressed.
* Sampling phase
The sampling phase is the timing at which the computer’s analog RGB signals are sampled. If
the sampling phase is off, the individual dots cannot be sampled at the proper timing, resulting
in blurred or flickering images.
Adjusting the picture automatically
1
2
KEYSTONE
AUTOSET
EXIT
ON / STANDBY
VOL / ADJ
ENTER
MENU
INPUT
FANTEMPLAMPON
AUTO SET
AUTO SET
MENUON/STANDBY INPUT
L-CLICK R-CLICK
ENTER
KEYSTONEAUTO
SET
EXIT
PIP
FREEZE
MUTE CALLRESIZE
VOLUME/ADJUST
LASER
You can adjust the optimum horizontal position, vertical position, sampling phase and
sampling frequency for projecting analog RGB signals at the touch of a button.
AUTO SET
SET
Input full screen video signals from the input
source (computer) and project the image.
Adjustments may not be performed properly for images that are
not displayed on the entire screen or for extremely dark
images.
Press AUTO SET.
The horizontal position, vertical position, sampling phase and
sampling frequency are adjusted automatically.
The icon 
 appears during signal processing. Remote control
Control panel
(Main unit side) 
						

							35
Operations
CONTENTSCorrecting the keystone distortion
A picture may be expanded on the upper side if projected upward from the projector lifted
up by the foot adjuster. The projector can correct this keystone distortion.
1 2
KEYSTONE
AUTOSET
EXIT
ON / STANDBY
VOL / ADJ
ENTER
MENU
INPUT
FANTEMPLAMPON
MENUON/STANDBY INPUT
L-CLICK R-CLICK
ENTER
KEYSTONEAUTO
SET
EXIT
PIP
FREEZE
MUTE CALLRESIZE
VOLUME/ADJUST
LASER
1
3 2
3
Remote control
Control panel
(Main unit side)
1
Press KEYSTONE.
The keystone adjustment menu appears, with the “Auto. V-
keystone” being selected. (This menu is the same as the sub-
menu which is displayed when “Correct the keystone distortion
of the screen” is selected from GUIDE MENU. 
45 )
Press ENTER.
The vertical keystone distortion on the picture projected is
automatically corrected.
The 
 icon appears while the keystone correction is
executing.
When the correction is finished, the menu for selecting
“V-keystone” or “H-keystone” by manual adjustment appears,
with the former being selected.
ENTER
ENTER
KEYSTONE
KEYSTONE
2
3
Confirm the keystone distortion.
When no more adjustment is needed, press the EXIT button
repeatedly until the menu disappears.
If the keystone distortion has not been corrected properly,
adjust it according to the next procedure.
EXIT
EXIT
Continued
Before correction
After correction 
						

							36
Operations
CONTENTS
MENUON/STANDBY INPUT
L-CLICK R-CLICK
ENTER
KEYSTONEAUTO
SET
EXIT
PIP
FREEZE
MUTE CALLRESIZE
VOLUME/ADJUST
LASER
4,5
6
6 4,5
KEYSTONE
AUTOSET
EXIT
ON / STANDBY
VOL / ADJ
ENTER
MENU
INPUT
FANTEMPLAMPON
Remote control
Control panel
(Main unit side)
Correcting the keystone distortion (continued)
4
If the screen is not installed vertically,
“Auto. V-keystone” is not corrected
properly.
After confirming that “V-keystone” is selected on the menu;
Adjust the distortion of the both sides (right and left)
of the picture with the selection buttons ( 
 /  ).
5
When the projector is not installed at an angle of 90° to the
screen viewed from the top, the upper and lower sides of the
projected picture will be
distorted.
90°
Select “H-keystone” from the menu with the
selection buttons (
  /  ), and adjust the
distortion of the upper and lower sides of the
picture with the selection buttons (
  /  ).
6
Press EXIT repeatedly until the menu
disappears.
The keystone adjustment finishes.
EXIT
EXIT
Notes
•Due to digital correction processing, some of the information may be eliminated or the picture
quality may be degraded depending on the amount of keystone correction or the contents of
the signal source.
•The adjustable range of “V-keystone” or “H-keystone” is influenced by each other’s correction
amount, and each input signal 
71 . Therefore, the correction amount may change when
switching the input.
•When “Auto. V-keystone” does not operate properly even with the screen installed vertically,
execute “Horizontal reference value reset” 
52 . 
						

							37
Operations
CONTENTSCutting off the picture and sound temporarily
The image and sound of this projector can be turned off if you wish to temporarily project
the image from another projector or an OHP, etc., onto the screen.
Note
The mute mode is cancelled if another operation is performed during the mute mode.
MENUON/STANDBY INPUT
L-CLICK R-CLICK
ENTER
KEYSTONEAUTO
SET
EXIT
PIP
FREEZE
MUTE CALLRESIZE
VOLUME/ADJUST
LASER
MUTE
MUTEPress MUTE.
The sound and picture are cut off temporarily.
To cancel the mute mode, press MUTE again. The image and
sound will be output.
The 
 icon appears in the mute mode. Remote control 
						

							38
Operations
CONTENTSFreezing the picture
You can freeze the image being projected.
Use this function to stop moving images from a video recorder during presentations.
Notes
•The frozen image can be enlarged with the RESIZE buttons. The freeze mode is cancelled if
any operation other than RESIZE is performed.
•The freeze mode cannot be set when there is no input (when no signals are being supplied
from a signal source).
•The input source’s moving image continues to run even when the projector is set in freeze
mode.
•If you use this function on video soft sold on the market, broadcast or broadcast on cable
except for the purpose of your private seeing and hearing, it may infringe the copyright
protected by the copyright laws.
MENUON/STANDBY INPUT
L-CLICK R-CLICK
ENTER
KEYSTONEAUTO
SET
EXIT
PIP
FREEZE
MUTE CALLRESIZE
VOLUME/ADJUST
LASER
FREEZE
FREEZEPress FREEZE.
The picture freezes.
To release the picture, press FREEZE again.
The 
 icon appears in the freeze mode. Remote control 
						

							39
Operations
CONTENTS
You can enlarge (resize) the picture size projected.
Enlarging the picture size
Press RESIZE ().
The enlargement ratio increases each time the RESIZE ()
button is pressed.
The enlargement ratio can be increased continuously by keeping the
button pressed in.
To reduce the enlargement ratio, press the RESIZE () button.
The enlargement ratio can be reduced continuously by keeping the button
pressed in.
The enlarged section is moved when the selection buttons
(
 /  /  / ) are pressed.
The section can be moved continuously by keeping the button pressed in.
Press the EXIT button to cancel the resize mode and return to the
original size.
MENUON/STANDBY INPUT
L-CLICK R-CLICK
ENTER
KEYSTONEAUTO
SET
PIP
FREEZE
MUTE CALLRESIZE
VOLUME/ADJUST
LASER
EXITEXIT
RESIZERESIZE
///
RESIZE
RESIZE
EXIT
Notes
•Enlarged images can be frozen by pressing the FREEZE button. The frozen image can also be
enlarged or reduced.
•The resize mode is cancelled if any operation other than setting the freeze mode is performed.
•This projector uses electrical digital resizing, so the picture quality degrades when images are
enlarged.
•This function does not work in no input status (no signal is supplied from the signal source).
•If you use this function on video soft sold on the market, broadcast or broadcast on cable
except for the purpose of your private seeing and hearing, it may infringe the copyright
protected by the copyright laws.
Remote control
The icon 
 appears in the resize mode. 
						

							40
Operations
CONTENTS
Press PIP.
A sub-picture is displayed.
Press the PIP button again to turn off the sub-picture.
Video or S-video images can be displayed as small images within the computer’s image.
(Referred to as “sub-pictures” in this manual.)
Notes
•The PIP function cannot be used when a source other than an RGB input source is selected.
•The PIP function cannot be used without signals supplied from an RGB signal source.
•The sub-picture turns off if any other operation is performed.
•The signal source, size, display position and audio input source to display sub-pictures can be
changed from the menu screen. 
53
•If you use this function on video soft sold on the market, broadcast or broadcast on cable
except for the purpose of your private seeing and hearing, it may infringe the copyright
protected by the copyright laws.
PIP
Displaying PIP Sub-pictures
PIP
MENUON/STANDBY INPUT
L-CLICK R-CLICK
ENTER
KEYSTONEAUTO
SET
EXIT
FREEZE
MUTE CALLRESIZE
VOLUME/ADJUST
LASER
PIP
Remote control