Panasonic LCD Projector PT-LB51NTU PT-LB51U PT-LB51SU Operating Instructions

							PICTURE menu
ENGLISH - 31
Settings
You can keep the projected image bright and vivid even 
in well-lit rooms where the ambient light sources cannot 
be controlled, such as when a door opens or when 
window coverings fail to block out sunlight.
 AUTO: Automatic adjustment
 OFF:Deactive
The lamp is controlled according to the input signals to 
project images with the best quality.
 ON: Active
 OFF:Deactive
You can perform more detailed image adjustment 
manually.
JFor RGB signals
QWHITE BALANCE
You can adjust the white balance more properly in 
3 colors temperature by pressing I H.
 WHITE BALANCE RED
 WHITE BALANCE GREEN
 WHITE BALANCE BLUE
JFor S-VIDEO/VIDEO signals
QTV-SYSTEM
When the video signal is changed, the setting 
switches automatically. You can switch the setting 
manually to match the video data. Press I H to 
cycle through the options.
QSTILL MODE
You can reduce the vertical flicker when projecting 
a still image.
 OFF: Deactive
 ON: Active
QNOISE REDUCTION
You can switch the automatic noise reduction 
system on/off. Press I H to select the required 
setting.
 ON: Automatic noise reduction
 OFF: No noise reduction
DAYLIGHT VIEW
NOTE:
• Do not cover the Luminance Sensor of the projector. 
See “Luminance Sensor” on page 12.
•AUTO is not available when INSTALLATION setting in 
OPTION menu is set to REAR/DESK or REAR/
CEILING.
AI
NOTE:
•“AI” is disabled when “LAMP POWER” is set to “ECO-
MODE”. See “LAMP POWER” on page 34.
DETAILED SETUP
NOTE:
•AUTO setting will select from NTSC/NTSC 4.43/PAL/
PAL60/PAL-M/PAL-N/SECAM.
NOTE:
•Set to OFF when projecting a moving image.
NOTE:
• Applying noise reduction may affect image quality.
NTSC
NTSC 4.43
PAL
AUTO
SECAM
PAL-N
PAL-M 
						

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Settings
POSITION menu
This projector detects its own degree of tilt and corrects 
the keystone distortion automatically.
 OFF: Deactive
 ON: Active
This projector detects its own degree of tilt and corrects 
the keystone distortion automatically (“REALTIME 
KEYSTONE”). However, keystone distortion may still 
affect the images in some cases (e.g. when the projector 
is tilted slightly and the tilt is corrected slowly by hand or 
when the screen itself is tilted). In such cases, set 
“REALTIME KEYSTONE” to “OFF” and correct the 
vertical keystone distortion manually.(S-VIDEO/VIDEO/COMPUTER/COMPONENT signals 
only)
You can move the projected image for fine adjustment. 
Press I H to move horizontally and F G vertically.
(COMPUTER signals only)
If you have interference patterns of the projected image, 
which is sometimes referred to as moire or noise, you 
can minimize it by pressing I H to adjust the clock 
frequency.
(COMPUTER/COMPONENT signals only)
If you require further adjustment for the same reason as 
the DOT CLOCK adjustment, you can fine adjust the 
timing of the clock. Press I H to adjust.
(S-VIDEO/VIDEO/480i, 576i, 480p and 576p 
COMPONENT signals only)
You can switch the aspect ratio manually when needed. 
Press I H to cycle through the options.
REALTIME KEYSTONE
KEYSTONE
ImageOperation
NOTE:
• You can correct the distortion ± 30 degrees from the 
plane. For a better quality image, installing the projector 
with a minimum of distortion is recommended.
• The distortion of the Main menu screen is not 
correctable.
• The result of the keystone correction will affect the 
aspect ratio and the size of the image.
• You can correct the keystone distortion manually when 
“REALTIME KEYSTONE” is set to “ON”. 
However, when you turn on the power, the amount of 
correction will be reset and “REALTIME KEYSTONE” 
will function again if the tilt is different from the last time 
you used the projector. If you correct the keystone 
distortion manually when “REALTIME KEYSTONE” is 
set to “OFF”, the amount of correction will be stored by 
the projector even after the power is turned off.
Remote control Control panel
 See “Navigating through the MENU” on page 27.
 See “Main menu and Sub-menu” on page 28.
POSITION
DOT CLOCK
NOTE:
• If the projecting signal’s dot clock frequency is higher 
than 100 MHz, the adjustment may not make a 
difference.
•DOT CLOCK needs to be adjusted before adjusting the 
CLOCK PHASE.
CLOCK PHASE
NOTE:
• If the projecting signal’s dot clock frequency is higher 
than 100 MHz, the adjustment may not make a 
difference.
•CLOCK PHASE is available with PC signals and the 
following COMPONENT connection.
ASPECT
POSITION
H
V
4:3
16:9
AUTO
S4:3 
						

							LANGUAGE menu
ENGLISH - 33
Settings
Q4:3
The input signal will be projected without any 
change.
Q16:9
The squeezed signal will be projected in 16:9 ratio.
QS4:3
The input signal will be sized down 75 % and 
projected. S4:3 mode is effective when projecting 
4:3 image on to a 16:9 screen.
QAUTO
The S1 signal which contains an identifying signal 
will be detected and automatically project the 
image in proper ratio.(S-VIDEO/VIDEO/COMPUTER/COMPONENT signals 
only)
When the input signal resolution is lower than the 
projector resolution, it will be projected at the projector 
resolution. You can deactivate the RESIZING and 
project the lower resolution input signal at its original 
resolution. Press I H to select the required setting.
 ONActive
 OFFDeactive
(COMPUTER signals only)
If the projected image is degraded, you can activate 
FRAME LOCK for synchronization. Press I H to select 
the required option.
 OFFDeactive
 ONActive
1. Press the MENU button to display the menu 
screen.
 Indicates the language which is currently set
2. Select the “LANGUAGE” menu from the main 
menu, and then press the ENTER button.
3. Press the F or G button to select a language, and 
then press the ENTER button.
NOTE:
• If you project an image with an unmatched aspect ratio, 
the image may distort or some portions may be 
cropped. Select an aspect ratio which preserves the 
intention of the image creator.
• The order of ASPECT types is defined not only by the 
input method but also by the input signals. “List of 
compatible signals” on page 44
• If you project a copyrighted image enlarged or distorted 
by using ASPECT function in commercial use in a 
public place, such as a restaurant or hotel, you might 
infringe on the copyright of the creator which is 
protected by copyright law.
S1 video signals
• S1 video signals are a type of video signal with an 
aspect ratio of 16:9 which include a detector signal. 
This detector signal is output by some sources such as 
wide-vision video decks.
• When “ASPECT” is set to “AUTO”, the projector 
recognizes the detector signal and automatically 
switches the aspect ratio to 16:9.
RESIZING
NOTE:
• Usually the recommended setting is ON.
• When the RESIZING is set to ON, the lower resolution 
input signal may be projected in less quality.
When the RESIZING is set to OFF;
• The size of the image will be projected smaller and you 
may need to adjust ZOOM and FOCUS, or the 
projector position backward and forward.
•DIGITAL ZOOM, REALTIME KEYSTONE, 
KEYSTONE and INDEX-WINDOW are not available.
FRAME LOCK
LANGUAGE menu 
						

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Settings
OPTION menu
When the input signal is changed, the input signal 
information will be displayed in the upper right corner of 
the projected images. You can select the level of the 
input signal information.
You can switch the logo on/off that is displayed when 
starting up the projector. Press I H to select the 
required option.
 ONActive
 OFFDeactive
You can assign frequently-used operations to the 
FUNCTION button on the projector and use it as a 
convenient shortcut button. The functions which can be 
set are “SHUTTER”, “AUTO SETUP”, “PICTURE 
MODE”, “FREEZE” and “INDEX WINDOW”.
Use I H to select the function to assign to the 
FUNCTION button.
You can switch the function of the COMPUTER2 IN/
1OUT terminal.
 INPUT COMPUTER2 IN
 OUTPUT COMPUTER1 OUT
This setting changes the lamp brightness. When set to 
“ECO-MODE”, the luminance of the lamp is reduced, but 
the projector uses less power, and the operating noise is 
also reduced. This can help to extend the lamp’s 
operating life. If using the projector in small rooms where 
high luminance is not required, it is recommended that 
you set the “LAMP POWER” to “ECO-MODE”.
 STANDARDNormal mode
 ECO-MODEECO mode
INPUT GUIDE
OptionsFunction
OFFThe input signal information will not 
be displayed.
SIMPLEOnly the name of the input signal will 
be displayed.
DETAILEDThe input signal information will be 
displayed in detail.
NOTE:
• If “INPUT GUIDE” is set to “DETAILED”, the guide 
screen for computer connection will be displayed when 
COMPUTER1 or COMPUTER2 is selected and no 
signal is being input to the COMPUTER1 IN or 
COMPUTER2 IN connector. If you would like the guide 
screen not to be displayed, set “INPUT GUIDE” to 
“SIMPLE” or “OFF”.
STARTUP LOGO
Remote control Control panel
 See “Navigating through the MENU” on page 27.
 See “Main menu and Sub-menu” on page 28.
FUNCTION BUTTON
SHUTTEROperates the shutter function
See “SHUTTER” on page 36
AUTO SETUPStarts the automatic position 
correction function
See “AUTO SETUP” on 
page 35
PICTURE MODESwitches the picture mode
See “PICTURE MODE” on 
page 30.
FREEZEOperates the freeze function
See “Capturing an image” on 
page 24
INDEX WINDOWOperates the INDEX-
WINDOW function
See “INDEX-WINDOW” on 
page 36
COMPUTER2 SELECT
LAMP POWER
NOTE:
•“LAMP POWER” cannot be set when no signal is being 
input.
SHUTTER
INDEX WINDOWPICTURE MODE
FREEZE
AUTO SETUP 
						

							OPTION menu
ENGLISH - 35
Settings
You can check how long the lamp has been used.
You can set the off timer to switch off the POWER of the 
projector after a certain period of time automatically 
when no signal is detected. Press I H to select the 
required period from 15 to 60 minutes at intervals of 
5 minutes.
You can switch the projector start up status for when the 
Power cord is connected. Press I H to select the 
required option.
 OFFThe projector will start from the 
standby mode or the projecting 
mode.
 (The projector will start from the 
same status as when the power cord 
was disconnected.)
 ONThe projector will start from the 
projecting mode.
You can turn off the function of the control panel buttons 
on the projector body. Press I H to select the required 
option.
 INVALIDInvalidate the control panel buttons
Confirmation screen will be 
displayed.
 VALIDValidate the control panel buttons
You can turn off the AUTO SETUP function for when the 
COMPUTER signal is detected.
 AUTOWhen the projector detect a 
COMPUTER signal, adjust the 
projected image position 
automatically for SIGNAL SEARCH, 
DOT CLOCK and CLOCK PHASE.
 BUTTONOnly when the AUTO SETUP button 
is pressed, the projected image 
position will be adjusted for DOT 
CLOCK and CLOCK PHASE. See 
“Remote control” on page 10.
You can turn off the auto signal detecting system.
 ONDetect the input signal from the 
terminals and project the image.
 OFFDeactive
When installing the projector, select the projection 
method according to the projector position. Press I H 
to cycle through the options. See “Projection method” on 
page 16.
LAMP RUNTIME
NOTE:
•LAMP RUNTIME is a relevant matter for lamp 
replacement timing. See “Replacing the Lamp unit” on 
page 41.
POWER OFF TIMER
DIRECT POWER ON
NOTE:
• When the projector is started from the projecting mode, 
pressing the POWER button procedure is skippable.
CONTROL PANEL
DISABLE
15 MIN.
20 MIN.
25 MIN.
30 MIN.
35 MIN.
60 MIN.
55 MIN.
50 MIN.
45 MIN.
40 MIN.
AUTO SETUP
NOTE:
• Usually the recommended setting is AUTO.
SIGNAL SEARCH
NOTE:
•SIGNAL SEARCH is not available when any input 
signal is projecting.
• Usually the recommended setting is ON.
INSTALLATION
FRONT/DESKSetting on a desk/floor and 
projecting from front
FRONT/CEILINGMounting in the ceiling and 
projecting from front
REAR/DESKSetting on a desk/floor and 
projecting from rear
REAR/CEILINGMounting in the ceiling and 
projecting from rear 
						

							Settings
OPTION menu
ENGLISH - 36
If you use the projector at high elevation, the HIGHLAND 
setting need to be ON to set the fan speed high. Press 
I H to select the required option.
 OFFThe fan speed is low.
 ONThe fan speed is high.
(480i, 576i, 480p, 576p, 1 080/60i, 1 080/50i, 720/60p 
and VGA480 signals only)
This sets the signal that is input to the COMPUTER1 IN 
and COMPUTER2 IN/1 OUT connector.
Normally “AUTO” should be selected. RGB or YP
BPR is 
selected automatically depending on the synchronizing 
signal status.
If an image is not projected correctly, select “RGB” or 
“YP
BPR” in accordance with the input signal.
 AUTOautomatically
 RGBRGB
 YP
BPRYPBPR
You can adjust the volume of the sound that is output 
from the projector’s built-in speaker and VARIABLE 
AUDIO OUT connector.
 
You can perform more detailed setting in various items.
JINDEX-WINDOW
This functions in the same way as the INDEX-
WINDOW button on the remote control unit. 
Refer to “Projecting an image in INDEX-WINDOW 
mode” on page 25 for details.
JSHUTTER
This functions in the same way as the SHUTTER 
button on the remote control unit. 
Refer to “Stopping the projection temporary” on 
page 24 for details.
JOSD DESIGN
You can change the background color of the menu. 
Press I H to select the required option.
JSXGA MODE
(COMPUTER SXGA signals only)
You can switch the setting between SXGA and the 
larger setting, SXGA+. Press I H to select the 
required option.
JXGA MODE
(COMPUTER XGA signals only)
You can switch the setting between XGA and the 
wider setting, WXGA. Press I H to select the 
required option.
JBLACKBOARD
You can exclude the BLACKBOARD in menu 
items of PICTURE MODE in PICTURE menu. 
Press I H to select the required option.
 ONInclude the BLACKBOARD in menu 
items.
 OFFExclude the BLACKBOARD in menu 
items.
JBACK COLOR
You can choose a BLUE or BLACK screen for 
when the projector is idle. Press I H to select the 
required option.
HIGHLAND
NOTE:
• At 1 400 m (4 593 ft) above sea level, the setting must 
be ON.
• The loudness of fan noise depends on the HIGHLAND 
setting.
RGB/YPBPR
VOLUME
DETAILED SETUP
TYPE1Semi transparent black
TYPE2Solid blue
TYPE3Semi transparent dark blue 
						

							ENGLISH - 37
Settings
SECURITY menu
JEntering the SECURITY
Every time when you apply to the SECURITY 
menu, you will be asked to perform the password 
operation.
When you apply to the SECURITY menu before you 
change the password to your original, perform to input 
the following factory default password operation.
 Press F H G I F H G I and ENTER.
QAfter you change the password
When you apply to the SECURITY menu after you 
change the password to your original in the 
PASSWORD CHANGE menu, input the original 
password operation.
You can activate the security system and the password 
operation will be asked to perform when the projecting 
mode started. Unless you perform the correct password 
operation, all of the button controls will be disabled 
except the POWER button.
 OFFDeactive
 ONActive
You can change the password operation to your original.
1. Press a series of button operation up to 8 as a 
password by using F G I and H buttons.
2. Press ENTER.
3. Press the exact same series of button operation 
you entered in the NEW password box for 
confirmation.
 If a series of button operation is incorrect, you will be 
asked to perform again.
4. Press ENTER.
You can set your original text, such as company name or 
URL information, to display regularly at the bottom of the 
projected image while projecting.
 OFFDeactive
 ONActive
You can enter your original text up to 22 characters for 
TEXT DISPLAY.
1. Use F G I H to specify the location of the 
required character.
2. Press ENTER.
 The selected character will be displayed in the TEXT 
CHANGE box.
3. Repeat until finish your original text.
 If you select DELETE, you can delete a character is 
selected with cursor. Then press ENTER.
4. Select OK and press ENTER to set the entered 
text.
 Select CANCEL or press MENU/RETURN buttons to 
return to the previous menu.
NOTE:
• The factory default password is valid until you change 
the password in PASSWORD CHANGE menu.
• The entered password operations will appear as 
asterisks in the box.
INPUT PASSWORD
NOTE:
• When you activated the security system, make sure to 
change the password to your original for safety.
• The factory default password is valid until you change 
the password in PASSWORD CHANGE menu.
Remote control Control panel
 See “Navigating through the MENU” on page 27.
 See “Main menu and Sub-menu” on page 28.
PICTURE
POSITION
INPUT PASSWORD
PASSWORD CHANGE
TEXT DISPLAY
TEXT CHANGE
PASSWORD
LANGUAGE
OPTION
SECURITY
WIRELESS
OFF
OFF
PASSWORD CHANGE
NOTE:
• The entered password operations will appear as 
asterisks in the box.
TEXT DISPLAY
TEXT CHANGE
OK CANCELDELETE TEXT CHANGE 
						

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Settings
WIRELESS menu (PT-LB51NTU only)
In WIRELESS menu, the following items are available.
 NETWORK
Select the network setting you want to use.
 NAME CHANGE
The name for this projector can be set.
 INPUT PASSWORD
Set to “ON” if you want password confirmation to be 
used when controlling the projector with a personal 
computer by means of the wireless network.
 PASSWORD CHANGE
Passwords can be changed.
 WEB CONTROL
To control the projector with a personal computer by 
means of the wireless network, set the 
“WEBCONTROL” to “ON”.
 LIVE MODE CUT IN
Set to “ON” to allow users to connect to the network 
in LIVE mode while another user is already 
connected in LIVE mode.
 STATUS
The wireless settings will be displayed.
 INITIALIZE
Wireless settings can be returned to the factory 
default settings.
NOTE:
• See more detailed instructions in the contents of the 
CD-ROM which is provided with the projector.
Remote control Control panel
 See “Navigating through the MENU” on page 27.
 See “Main menu and Sub-menu” on page 28.
Items in WIRELESS menu 
						

							ENGLISH - 39
Maintenance
TEMP, LAMP Indicators
If a problem should occur with the projector, the TEMP, LAMP indicators will inform you. Manage the indicated 
problems as follow.
1. Confirm the status of all indicators and projector, and switch off the projector in proper way.
2. Find out the cause of the problem by status of the TEMP, LAMP indicators.
3. Follow the instruction for each indication below and solve the problem.
4. Turn on the projector in the correct way and confirm the indicator is not indicating a problem any longer.
JLAMP indicator
JTEMP indicator
Managing the indicated problems
NOTE:
• If no problem is found or the problem remains, do not turn on the projector. Instead contact an Authorised Service Center.
Indicator Illuminating RED Flashing RED
ProblemLAMP RUNTIME has 
reached 1 800 hours.LAMP circuit failure, abnormal function or Lamp unit is damaged.
CauseLamp unit will run out 
soon and needs to be 
replaced.The POWER is 
switched on again 
before the Lamp unit 
is cooled enough.LAMP circuit failure, 
abnormal function.Lamp unit is 
damaged.
RemedySee “Replacing the 
Lamp unit” on page 41.Let the Lamp unit cool 
down and turn on the 
POWER.Contact an Authorised 
Service Center.See “Replacing the 
Lamp unit” on page 41.
Indicator Illuminating RED and still projecting
 Flashing RED and POWER is turned off
ProblemThe temperature inside and/or outside the projector is abnormally high.
CauseThe ventilation openings are 
covered.The room temperature is too 
high.The projector is located at high 
elevations (above 1 400 m).
RemedyRemove the object(s) from the 
ventilation openings or clear 
around the projector.Reinstall the t a temperature 
controlled place. 
See “Specifications” on 
page 48.Turn on the projector
*1 and set 
the HIGHLAND to ON.
See “HIGHLAND” on page 36.
*1. The projector will perform only 2 minutes with OFF setting at high elevation.
TEMP indicator
LAMP indicator 
						

							ENGLISH - 40
Maintenance
Care and Replacement
JBefore cleaning the projector
 Disconnect the power cord plug from the wall outlet.
 Unplug all the cables from the projector.
JCleaning the outer surface of the projector
Wipe off dirt and dust gently with a soft cloth.
 If it is difficult to remove the dirt, soak a cloth in a neutral detergent diluted with water, wring the cloth well 
and then wipe the projector. Dry off the projector with dry cloth.
 If you use a chemical treated wipe, follow the instructions supplied with it.
JCleaning the lens
Wipe off dirt and dust gently with a lint-free cloth.
 Make sure no dirt or dust remains on the surface of the lens. It will be enlarged and projected onto a 
screen.
JCleaning the air filter
If the air filter becomes clogged with dust, the internal temperature of the projector will rise, the TEMP indicator 
will illuminate and the projector’s power will turn off (the TEMP indicator will flash after the power is turned off). 
The air filter should be cleaned every 100 hours of use.
Use a vacuum cleaner to clean off any accumulated dust.
JBefore replacing the Air filter
 Disconnect the power cord plug from the wall outlet.
JReplacement procedure
1. Gently turn the projector upside down.
2. Remove the Air filter cover.
3. Replace the Air filter, and then install the Air filter cover.
Cleaning the projector
NOTE:
• If the dust cannot be cleaned by a vacuum cleaner, remove the air filter and soak it in water, and then wash out the dust by 
hand. Be sure to install the air filter after it has dried.
• Do not use detergent when washing the air filter.
• If the dust cannot be removed by cleaning, it is time to replace the air filter. Please consult your dealer.
Furthermore, if the lamp unit is being replaced, replace the air filter at this time also.
Replacing the air filter
Air filter cover
Air filter cover
Air filter
NOTE:
• Be sure to install the air filter before using the projector. If the projector is used without the air filter installed, dust and other 
foreign particles will be drawn into the projector, and malfunctions will result.