Panasonic LCD Projector PT-LB80NTU PT-LB80U PT-LB75NTU PT-LB75U Operating Instructions

Care and Replacement
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Maintenance
The lamp unit, ET-LAB80 is consumable and you must replace it regularly. It is recommended that a qualified 
technician carry the lamp unit replacement and consult with an Authorized Service Center.
JWhen to replace the Lamp unit
When the lamp is consumed, the brightness may decrease over time. 3 000 hours of use is the replacing 
timing as rough guided, and that might be shortened by the usage conditions, characteristics of the lamp unit 
or environmental...

Maintenance
Care and Replacement
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JReplacement procedure
QRemoving and replacing the lamp unit
1. Use a Phillips-head screwdriver to loosen the 2 
lamp unit cover fixing screws on the back of the 
projector until the screws turn freely, and remove 
the lamp unit cover.
2. Use a Phillips-head screwdriver to loosen the 3 
lamp unit fixing screws.3. Pull the used lamp unit gently from the projector.
 Grip the handle and keep the lamp unit paralleled 
when you remove the lamp. Some parts of the...

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Maintenance
Troubleshooting
Should any problem persist, contact your dealer.
ProblemCauseReference 
page
Power does not turn on.
 The power cord may not be connected securely.
 No electric supply 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.18
19
39
39
42
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No picture appears.
 The signal input source may not be connected to a terminal properly.
 The input...

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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.Terminals
H...

Technical Information
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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 10 seconds after the lamp is switched on. Wait 10 seconds 
before sending the command.
 If sending multiple...

Appendix
Technical Information
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JCable specifications
(When connected to a personal computer)
JControl commands
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. 
CommandControl contentsRemarks
PONPower onIn standby mode, all...

Technical Information
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Appendix
* All measurements above are approximate and may differ slightly from the actual measurements.
JCalculation methods for screen dimensions
You can calculate more detailed screen dimension from the screen diagonal.
 Screen width (SW) and screen height (SH)
SW (m) = SD () x 0.0221 SH (m) = SD () x 0.0125
 Minimum distance (LW) and maximum distance (LT)
PT-LB80NTU: LW (m) = 0.0321 x SD () - 0.04 LT (m) = 0.0388 x SD () - 0.06
PT-LB75NTU: LW (m) = 0.0318 x SD () -...

Appendix
Technical Information
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Specifications
Power supplyAC 100 - 240 V 50 Hz/60 Hz
Power consumption300 W
During standby (when fan is stopped): 4 W
Amps3.5 A - 1.2 A
LCD panel
Panel size (diagonal)0.63 type (16.00 mm)
Aspect ratio4 : 3
Display method3 transparent LCD panels (RGB)
Drive methodActive matrix method
Pixels786 432 (1 024 x 768) x 3 panels
LensManual zoom (1.2x)/Manual focus
F 1.6 - 1.9, f 18.8 mm - 22.6 mm (PT-LB80NTU /PT-LB80U)
F 1.7 - 1.9, f 18.5 mm - 22.2 mm (PT-LB75NTU /...

Technical Information
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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
COMPUTERSingle - line, D - sub HD 15-pin (female)
 RGB input/output
R.G.B.:
0.7 V [p-p], 75 Ω
G SYNC:
1.0 V [p-p], 75 Ω
HD, VD/SYNC: TTL high impedance, automatic 
positive/negative polarity 
compatible
 YPBPR/YPBCB input/output
Y:
1.0 V [p-p] (include sync) 75Ω
PB/CB, PR/CR:
0.7 V [p-p] 75Ω
AUDIO INSingle - line, 0.5V [rms],...

Appendix
Technical Information
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 VGA and XGA are trademarks of International Business Machines Corporation.
 S-VGA is a registered trademark of the Video Electronics Standards Association.
 HDMI, the HDMI logo and High-Definition Multimedia Interface are trademarks or registered trademarks of 
HDMI Licensing LLC.
 The font used in the on-screen displays is a Ricoh bitmap font, which is manufactured and sold by Ricoh 
Company, Ltd. 
All other trademarks are the property of the various...