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

							Care and Replacement
ENGLISH - 41
Maintenance
JBefore replacing the Lamp unit
 Disconnect the power cord plug from the wall outlet.
 Make sure the Lamp unit and the surroundings are cooled enough.
 Prepare a Phillips-head screwdriver.
 Contact an Authorised Service Center to purchase a replacement Lamp unit (ET-LAB50).
 When the projector is mounted in the ceiling, do not work directly under the projector or put your face closer 
to the projector.
JWhen to replace the Lamp unit
The Lamp unit is a consumable product. Even when the full life of the bulb has not been exhausted, the 
brightness of the light will gradually decline. Therefore periodic replacement of the lamp is necessary.
The intended lamp replacement interval is 2 000 hours, but it is possible that the lamp may need to be 
replaced earlier due to variables such as a particular lamp’s characteristics, usage conditions and the 
installation environment.
Early preparation for lamp replacement is encouraged.
The lamp will automatically shut off after approximately 10 minutes when 2 000 hours of use have been 
reached because of a much greater chance of it exploding after this time.
JReplacement procedure
1. Disconnect the Power cord from the projector (See “Power cord” on page 20), and check that the area around 
the Lamp unit has cooled down.
Replacing the Lamp unit
NOTE:
• Prior to replacing the lamp unit, allow it to cool down to prevent the risk of burns, damage and other hazards.
• Do not attempt replacement with an unauthorised lamp unit.
IndicationOn screen
LAMP indicator
Over 1 800 hours“REPLACEMENT LAMP” is displayed on 
the upper left of the screen for 30 seconds.
Illuminates RED.
Over 2 000 hours“REPLACEMENT LAMP” is displayed on 
the upper left of the screen, and it will stay 
until you respond.
To clear the screen, press any button.
NOTE:
• The usage hours explained above are for when “LAMP POWER” in the “OPTION” menu has been set to “STANDARD” 
and when “AI” in the “PICTURE” menu has been set to “OFF”. If “LAMP POWER” is set to “ECO-MODE”, or “AI” is set to 
“ON”, the life of the lamp can be extended.
• While 2 000 hours is the intended replacement interval, it is not a period of time covered by warranty.
REPLACE LAMP
NOTE:
• If the lamp usage time has passed 2 000 hours (when “LAMP POWER” has een set to “STANDARD” and when “AI” has 
been set to “OFF”), the projector will switch to standby mode after approximately 10 minutes of operation. The steps 7 to 
12 should thus be completed within 10 minutes. 
						

							Maintenance
Care and Replacement
ENGLISH - 42
2. Use a Phillips screwdriver to turn the lamp unit cover fixing screws at the bottom of the projector, and then 
remove the Lamp unit cover.
3. Use a Phillips screwdriver to loosen the two lamp unit cover fixing screws until the screws turn freely. 
Then hold the handles of the Lamp unit and gently pull the Lamp unit out from the projector.
4. Insert the new Lamp unit while making sure that the direction of insertion is correct, and then use a Phillips 
screwdriver to securely tighten the lamp unit fixing screws.
 When inserting the new Lamp unit, be sure to push it in at the point   and  .
5. Install the Lamp unit cover, and then use a Phillips screwdriver to securely tighten the lamp unit cover fixing 
screws.
6. Connect the Power cord.
7. Press the POWER button so that a picture is projected onto the screen.
8. Press the MENU button to display the menu screen, and then press the F or G button to select the “OPTION” 
menu.
9. Press the ENTER button, and then press the F or G button to select “LAMP RUNTIME”.
10.Press and hold the ENTER button for approximately 3 seconds.
 The “LAMP RUNTIME” screen will be displayed.
11. Press the POWER button to turn off the power.
12.Disconnect the Power cord after the POWER button on the projector illuminates red.
 This will reset the cumulative usage time for the lamp unit to “0”.
NOTE:
• Be sure to install the Lamp unit and the Lamp unit cover securely. If they are not securely installed, it may 
cause the protection circuit to operate so that the power cannot be turned on.
NOTE:
• If “DIRECT POWER ON” in the “OPTION” menu has been set to “ON”, projection will start after the Power 
cord is connected. 
See “DIRECT POWER ON” on page 35.
NOTE:
• Press any button other than the POWER button to cancel the “LAMP RUNTIME” screen.
Lamp unit coverlamp unit cover fixing screws
Handleslamp unit fixing screws
AB 
						

							ENGLISH - 43
Maintenance
Troubleshooting
Should any problem persist, contact your dealer.
ProblemCauseReference 
page
Power does not turn on.
 The Power cord may not be connected.
 No electric supply is at the wall outlet.
 TEMP indicator is lit or flashes.
 LAMP indicator is lit or flashes.
 The lamp unit cover has not been securely installed.
 The circuit breakers have tripped.20
20
39
39
41
-
No picture appears.
 The video signal input source may not be connected to a terminal 
properly.
 The input selection setting may not be correct.
 The BRIGHTNESS adjustment setting may be at the minimum setting.
 The signal input source may not be operating properly.
 The SHUTTER function may be in use.19
24
30
-
24
The picture is fuzzy.
 The lens focus may not have been set correctly.
 The projector may not be at the correct distance from the screen.
 The lens may be dirty.
 The projector may be tilted too much.22
14
40
22
The color is pale or greyish.
 COLOR or TINT adjustment may be incorrect.
 The input source which is connected to the projector may not be 
adjusted correctly.30
28
No sound can be heard 
from the internal speaker. The audio signal source may not be connected properly.
 A cable may be connected to the VARIABLE AUDIO OUT terminal.
 The volume adjustment may be at the lowest possible setting.18
13
26
The control buttons of the 
projector do not operate.
 CONTROL PANEL in OPTION menu is invalidated. If you have a loss 
of the Remote control while the CONTROL PANEL is invalidated, 
press and hold the MENU button for 2 seconds with pressing the 
ENTER button.35
The Remote control does 
not operate.
 The batteries may be weak.
 The batteries may not have been inserted correctly.
 The Remote control signal receptor on the projector may be 
obstructed.
 The Remote control unit may be out of the operation range.
 The Remote control is under the strong light such as fluorescent.-
10
23
23
23
The picture does not 
display correctly. The signal format (TV-SYSTEM) may not have been set correctly.
 There may be a problem with the VCR or other signal source.
 A signal which is not compatible with the projector is being input.31
-
44
Picture from a computer 
does not appear.
 The cable may be longer than the optional cable.
 The external video output from a laptop computer may not be correct. 
(You may be able to change the external output settings by pressing 
the [Fn] + [F3] or [Fn] + [F10] keys simultaneously. The actual method 
varies depending on the type of computer; refer to the documentation 
provided with your computer for further details.)
 If an COMPUTER INPUT indicator is turned off, the video signals may 
not be output from the computer.
 COMPUTER2 SELECT setting in OPTION menu is not correct.-
47
12
34 
						

							ENGLISH - 44
Appendix
Technical Information
List of compatible signals
Mode
Display 
resolution 
(dots)
*1
*1. The “i” appearing after the resolution indicates an interlaced signal.
Scanning 
frequencyDot clock 
frequency
(MHz)Picture 
quality
*2
*2. The following symbols are used to indicate picture quality.
AA Maximum picture quality can be obtained.
A Signals are converted by the image processing circuit before picture is projected.
B Some loss of data occurs to make projection easier.
Resizing*3
*3. Signals with “OK” are compatible with the “RESIZING” function. See “RESIZING” on page 33.
*4. Signals that are compatible with the “FRAME LOCK” function. See “FRAME LOCK” on page 33.
*5 Signals that are compatible with the CVT standard.
Terminals

H (kHz)V (kHz)
NTSC/NTSC 4.43/
PA L - M / PA L 6 0720 x 480i 15.7 59.9 A OKVIDEO IN/
S-VIDEO IN
 PAL/PAL-N/SECAM 720 x 576i 15.6 50.0 A OK
480i 720 x 480i 15.7 59.9 13.5 A OK
COMPUTER1 IN/
COMPUTER2 IN
 576i 720 x 576i 15.6 50.0 13.5 A OK
480p 720 x 483 31.5 59.9 27.0 A OK
576p 720 x 576 31.3 50.0 27.0 A OK
1 080/60i 1 920 x 1 080i 33.8 60.0 74.3 A
1 080/50i 1 920 x 1 080i 28.1 50.0 74.3 A
720/60p 1 280 x 720 45.0 60.0 74.3 A
VGA400 640 x 400 31.5 70.1 25.2 A OK
COMPUTER1 IN/
COMPUTER2 IN
 640 x 400 37.9 85.1 31.5 A OK
VGA480 640 x 480 31.5 59.9 25.2 A OK
640 x 480 35.0 66.7 30.2 A OK
640 x 480 37.9 72.8 31.5 A OK
640 x 480 37.5 75.0 31.5 A OK
640 x 480 43.3 85.0 36.0 A OK
SVGA 800 x 600 35.2 56.3 36.0 A OK
800 x 600 37.9 60.3 40.0 A OK
800 x 600 48.1 72.2 50.0 A OK
800 x 600 46.9 75.0 49.5 A OK
800 x 600 53.7 85.1 56.3 A OK
MAC16 832 x 624 49.7 74.6 57.3 A OK
XGA 1 024 x 768 48.4 60.0 65.0 AA
1 024 x 768 56.5 70.1 75.0 AA
1 024 x 768 60.0 75.0 78.8 AA
1 024 x 768 68.7 85.0 94.5 AA
1 024 x 768i 35.5 87.0 44.9 AA
MXGA 1 152 x 864 64.0 71.2 94.2 A
1 152 x 864 67.5 74.9 108.0 B
1 152 x 864 76.7 85.0 121.5 B
MAC21 1 152 x 870 68.7 75.1 100 B
MSXGA 1 280 x 960 60.0 60.0 108.0 B
SXGA 1 280 x 1 024 64.0 60.0 108.0 B
1 280 x 1 024 80.0 75.0 135.0 B
1 280 x 1 024 91.1 85.0 157.5 B
SXGA+ 1 400 x 1 050 64.0 60.0 108.0 B
1 400 x 1 050 65.1 59.9 122.4 B
UXGA60 1 600 x 1 200 75.0 60.0 162.0 B
WXGA
*51 280 x 768 47.8 59.9 79.5 A
1 280 x 800 49.7 59.8 83.5 A
1 440 x 900 55.9 59.9 106.5 A
*4
*4
*4
*4
*4
*4
*4
*4
*4
*4
*4 
						

							Technical Information
ENGLISH - 45
Appendix
The serial connector which is on the connector panel of the projector conforms to the RS-232C interface 
specification, so that the projector can be controlled by a personal computer which is connected to this connecter.
JConnection
JPin assignments and signal names
JCommunication settings
JBasic format
 The projector can not receive any command for approximately 10 seconds after the lamp is switched on 
and for approximately 1 second after the cooling fan stops operating and the projector has returned to 
standby mode (approximately 90 seconds after the indicator switches off). 
Be sure to wait until the lengths of time mentioned above have passed before sending the command.
 If sending multiple commands, check that a response has been received from the projector for one 
command before sending the next command.
 When a command which does not require parameters to be sent, the colon (:) is not required.
 If an incorrect command is sent from the personal computer, the ER401 command will be sent from the 
projector to the personal computer.
Serial terminal
Pin No.Signal nameContents
A B FConnected internally
CRXD Received data
DGND Earth
ETXD Transmitted data
G HNC
Signal levelRS-232CCharacter length8bits
Sync. methodAsynchronousStop bit1bit
Baud rate9600bpsX parameterNone
ParityNoneS parameterNone
The data streaming from the computer will 
start with STX, and proceed to Command, 
Parameter and end with ETX. You can 
add the required parameter.
DIN 8 pin (male) COMPUTER1
Serial terminal (female)
Serial adapter 
(ET-ADSER:sold separately)
12
68
53
STX Command : Parameter ETX
Star t b yt e
(02h)1byte End
(03h) 3bytes1byte - 
4bytes 
						

							Appendix
Technical Information
ENGLISH - 46
JCable specifications
(When connected to a personal computer)
JControl commands
CommandControl contentsRemarks
PONPower ONIn standby mode, all commands other than the PON command are 
ignored.
 The PON command is ignored during lamp ON control.
POFPower OFFIf a PON command is received while the cooling fan is operating after the 
lamp has switched off, the lamp is not turned back on again straight away 
in order to protect the lamp.
AV LVo l u m eParameter
000 - 063 (Adjustment value 0 - 63)
IISINPUTParameter:
VID = VIDEO
RG1 = COMPUTER1SVD = S-VIDEO
RG2 = COMPUTER2
NWP = WIRELESS (PT-LB51NTU only)
Q$SLamp condition 
queryCall back
0 = Standby
1 = Lamp ON control active2 = Lamp ON
3 = Lamp OFF control active
OSHSHUTTERTurning off the projection temporarily.
Send the command to switch between ON and OFF.
Do not send the command consecutively.
If a command other than “OSH” is sent to the projector when the shutter 
function is used, the “ER401” command will be sent from the projector to 
the computer and the shutter function will be turned off.
Projector PC (DTE) 
						

							Technical Information
ENGLISH - 47
Appendix
You can switch the signals which to output from the COMPUTER1 OUT terminal by pressing the computer key 
command. The key commands are depend on the manufactures. If you select the computer terminals which has no 
signals while the INPUT GUIDE is set to DETAILED, the computer connection guidance will be displayed. 
Computer connection guidance
ManufacturerKey commandManufacturerKey commandManufacturerKey command
Panasonic
NEC + TOSHIBA
SHARP
HP + IBM
SONY + 
Apple
FUJITSU
 + EPSON
DELL + Other
 + 
NOTE:
• The computer connection guidance will disappear after 5 minutes.
• Please refer the instructions which provided with the computers for more detailed information. 
						

							Appendix
Technical Information
ENGLISH - 48
Specifications
Power supplyAC 100 - 240 V 50 Hz/60 Hz
Power consumption240 W
During standby (when fan is stopped): 4 W
Amps2.8 A - 1.3 A
LCD panel
Panel size (diagonal)0.6 type (15.24 mm)
Aspect ratio4 : 3
Display method3 transparent LCD panels (RGB)
Drive methodActive matrix method
PixelsPT-LB51NTU/PT-LB51U: 786 432 (1 024 x 768) x 3 panels
PT-LB51SU: 480 000 (800 x 600) x 3 panels
LensManual zoom (1 - 1.2 x)/Manual focus
F 1.6 - 1.9, f 18.8 mm - 22.6 mm
LampUHM lamp (165 W)
Optical output
2000lm*1
*1. ISO 21118 conformity:
The values given are averages based on mass-production articles, and the lower limit values at the time of shipment
are 80 % of the indicated values.
Light output uniformity*2
*2. ISO 21118 conformity:
The values given are averages based on mass-production articles, and the lower limit values at the time of shipment
are 80 % of the indicated values.
90 %
Contrast raito400 : 1
Operating environmentTemperature0°C - 40°C (32°F - 104°F)
When the HIGHLAND (page 36) 
is set to ON: 0 °C - 35 °C (32 °F - 
95 °F)
Humidity 20% - 80% (no condensation)
Scanning 
frequency
*3
(for RGB signal)
*3. See “List of compatible signals” on page 44 for available signals.
Horizontal scanning 
frequency15 kHz - 91 kHz
Vertical scanning 
frequency50 Hz - 85 Hz
Dot clock frequencyLess than 100 MHz
COMPONENT (YPBPR) signals480i, 480p, 576i, 576p, 720/60p, 1 080/50i, 1 080/60i, 
Color system7 (NTSC/NTSC 4.43/PAL/PAL-M/PAL-N/PAL60/SECAM)
Projection size33 - 300 (838.2 mm - 7 620 mm)
Throw distancePT-LB51NTU/PT-LB51U: 1.1 m - 11.1 m (37 - 365)
PT-LB51SU: 1.1 m - 10.9 m (37 - 359)
Optical axis shift6:1 (fixed)
Screen aspect ratio4 : 3
InstallationFRONT/DESK, FRONT/CEILING, REAR/DESK, REAR/CEILING 
(Menu selection method)
Speaker1 piece 4 cm X 2cm oval 
Max. useable volume output1.0 W (mono) 
						

							Technical Information
ENGLISH - 49
Appendix
Terminals
S-VIDEO INSingle - line, Mini DIN 4p
Y: 1.0 V [p-p], C: 0.286 V [p-p], 75Ω
VIDEO INSingle - line, RCA pin jack
1.0 V [p-p], 75Ω
COMPUTER1 INSingle - line, D - sub HD 15-pin (female)
  During RGB signals input
     R.G.B.
     G.SYNC0.7 V [p-p], 75 
Ω
1.0 V [p-p], 75 Ω
     HD, VDTTL high impedance, automatic 
positive/negative polarity compatible
  During YP
BPR signals input
     Y
1.0 V [p-p] (Including sync), 75 
Ω
     PB,PR0.7 V [p-p], 75 Ω
COMPUTER2 IN/
1OUTSingle - line, D - sub HD 15-pin (female)
Selectable for input and output by menu operation.
  During RGB signals input/output
     R.G.B.
     G.SYNC0.7 V [p-p], 75 
Ω
1.0 V [p-p], 75 Ω
     HD, VDTTL high impedance, automatic 
positive/negative polarity compatible
  During YP
BPR signals input
     Y
1.0 V [p-p] (Including sync), 75 
Ω
     PB,PR0.7 V [p-p], 75 Ω
AUDIO INSingle - line, 0.5V [rms], RCA pin jack x 2 (L - R)
COMPUTER AUDIO INSingle - line, 0.5V [rms], M3 jack (Stereo MINI)
VARIABLE AUDIO 
OUTSingle - line, 0.5V [rms], M3 jack (Stereo MINI)
Monitor output/stereo compatible
0 V [rms] - 2.0 V [rms] (variable)
SERIALDIN 8-pin RS-232C compatible
Wireless LAN
(PT-LB51NTU 
only)CompatibleIEEE802.11b/IEEE802.11g (Wireless LAN standard protocol)
Wireless channelIEEE802.11b/IEEE802.11g: 1 - 11 channels
Distance30 m (985) Depends on the usage environment
CabinetMoulded plastic (PC+ABS)
DimensionsWidth 297 mm (11 - 11/16)
Height57 mm (2 - 7/32) (Not including 
the projection parts)
Length 210 mm (8 - 1/4)
WeightPT-LB51NTU: 1.9kg (4.2lbs.)
PT-LB51U/PT-LB51SU: 1.8 kg (4.0 lbs.)
CertificationsUL60950
FCC Class BC-UL
Remote control
Power supply3V DC (AA batteries x 2)
Operating rangeApprox. 15 m (492) (when operated directly in front of signal 
receptor)
Weight117 g (4.2 ozs.) (including batteries)
DimensionsWidth 48 mm (1 - 7/8)
Length 163 mm (6 - 13/32)
Height24.5 mm (5/16) (not including 
surface projection parts)
Options
Ceiling bracketET-PKB50
Wireless remote 
control unitET-RM300
Serial adapterET-ADSER (DIN 8-pin/D-sub 9-pin) 
						

							Appendix
Technical Information
ENGLISH - 50
Dimensions