NEC Lt180 Portable Projector Users Manual

							E-44
6. MAINTENANCE
6. MAINTENANCE
This section describes the simple maintenance procedures you should follow to replace the lamp and clean the
projector cabinet.
Replacing the LampAfter your lamp has been operating for 2000 hours (up to 3000 hours in Eco mode) or longer, the LAMP indicator
in the cabinet will blink red and the message The lamp has reached the end of its usable life. Please replace the
lamp. will appear. Even though the lamp may still be working, replace it at 2000 (up to 3000 hours in Eco mode)
hours to maintain optimal projector performance.
CAUTION
• DO NOT TOUCH THE LAMP immediately after it has been used. It will be extremely hot. Turn the projec-
tor off, wait 60 seconds, turn off the main power switch and then disconnect the power cable. Allow at
least one hour for the lamp to cool before handling.
• DO NOT REMOVE ANY SCREWS except the lamp cover screw and two lamp case screws. You could
receive an electric shock.
• Do not break the glass on the lamp housing.
Keep finger prints off the glass surface on the lamp housing. Leaving finger prints in the glass sur-
face might cause an unwanted shadow and poor picture quality.
• The projector will turn off and go into standby mode after 2100 (up to 3100 hours in Eco mode) hours
of service. If this happens, be sure to replace the lamp. If you continue to use the lamp after 2000
hours (up to 3000 hours in Eco mode) of use, the lamp bulb may shatter, and pieces of glass may be
scattered in the lamp case. Do not touch them as the pieces of glass may cause injury. If this hap-
pens, contact your NEC dealer for lamp replacement.
To replace the lamp:
Preparation:
Be sure to insert the included spacer between the rear foot and the projector’s bottom to prevent the projector
from accidentally tilting when inserting the lamp house.
Spacer
Remove the spacer after replacing the lamp. 
						

							E-45
6. MAINTENANCE
SELECT
L
A
M
P
S
T
A
T
U
S
P
O
W
E
R
O
N
/
S
T
A
N
D
 
B
Y
A
U
T
O
A
D
J
.S
O
U
R
C
E
SELECT
L
A
M
P
S
T
A
T
U
S
P
O
W
E
R
O
N
/
S
T
A
N
D
 
B
Y
A
U
T
O
A
D
J
.S
O
U
R
C
E
2. Loosen the two screws securing the lamp housing until the screwdriver goes into a freewheeling condition.
The two screws are not removable.
Remove the lamp housing by holding it.
NOTE: There is an interlock on this case to prevent the risk of electrical shock. Do not attempt to circumvent this interlock.
Interlock
SELECT
L
A
M
P
S
T
A
T
U
S
P
O
W
E
R
O
N
/
S
T
A
N
D
 
B
Y
A
U
T
O
A
D
J
.S
O
U
R
C
ESELECT
L
A
M
P
S
T
A
T
U
S
P
O
W
E
R
O
N
/
S
T
A
N
D
 
B
Y
A
U
T
O
A
D
J
.S
O
U
R
C
E
1
2
1. Loosen the lamp cover screw until the screwdriver goes into a freewheeling condition and remove the lamp
cover. The lamp cover screw is not removable. 
						

							E-46
SELECT
LA
M P
S TA
TU
S
P O
W
ER
O N/S
TA
N D B
Y
AU TO
A D J.S
O URCESELECT
LA
M
P
S TA TU S
P O
W
ER
O N/S
TA N
D B
Y
AU TO
A D
J.S O URC E
NOTE:
• Align the lamp housing with the guide rail. Make sure the lamp housing plug goes to the socket correctly.• If both screws are not tightened securely, an image may not be displayed correctly. In this case, apply firm pressure to the portion of asterisk (

) in the above drawing to seat the lamp housing into thecase.
4. Reattach the lamp cover.
Tighten the lamp cover screw.
Be sure to tighten the screw.
5. After you install a new lamp, select the menu 
→ [Reset] → [Clear Lamp Hour Meter] to reset the lamp usage
hours.
NOTE:  When the lamp exceeds 2100 hours (up to 3100 hours in Eco mode) of ser\
vice, the projector cannot turn on and the
menu is not displayed. If this happens, press the HELP button on the rem\
ote control for a minimum of 10 seconds while in
standby mode. When the lamp time clock is reset to zero, the LAMP indica\
tor goes out.
6. MAINTENANCE
SELECT
L A
M
P
S TA TU S
P O
W
ER
O N/S
TA N D
 B
YA U TO
A D J
.S
O URC ESE L
E C T
L
A M P
S T
A T
U S
P O W E
R
O N
/
S T
A N D  
B YAU T
O
A D J
.S
O URCE
3. Insert a new lamp housing until the lamp housing is plugged into the soc\
ket.
Secure it in place with the two screws.
Be sure to tighten the screws.
CAUTION
• Do not use a lamp other than the replacement lamp (LH02LP).Order this from your dealer.
Socket Guide rail
(
) Push here. 
						

							E-47
CONTROL
C
O
M
P
O
N
E
N
T
 
I
N C
O
M
P
U
T
E
R
 
I
NV
I
D
E
O
 
I
N A
U
D
I
O
 
I
N
S-VIDEO IN
R C
r
/
P
r C
b
/
P
b
Y
L
/
m
o
n
o
A
U
D
I
O
 
I
N
M
O
N
I
T
O
R
 
O
U
T
S
E
L
E
C
T
LAMP
STATUS
POWER
ON/STAND BY
AUTO
ADJ.
A
C
 
I
N
S
E
L
E
C
T
LAMP
STATUS
POWER
ON/STAND BY
AUTO
ADJ.SOURCE
C
O
N
T
R
O
L
COMPONENT IN COMPUTER INVIDEO IN
AUDIO IN
S
-V
ID
E
O
 IN
R Cr/Pr Cb/Pb
Y
L/mono
AUDIO IN
MONITOR OUT
SELECT
L
A
M
P
S
T
A
T
U
S
P
O
W
E
R
O
N
/S
T
A
N
D
 B
Y
A
U
T
O
A
D
J
.
AC IN
6. MAINTENANCE
Cleaning the Cabinet and the Lens
1. Turn off the projector before cleaning.
2. Clean the cabinet periodically with a damp cloth. If heavily soiled, use a mild detergent. Never use strong
detergents or solvents such as alcohol or thinner.
3. Use a blower or lens paper to clean the lens, and be careful not to scratch or mar the lens. 
						

							E-48
7. TROUBLESHOOTING
This section helps you resolve problems you may encounter while setting up or using the projector.
Power Indicator
Indicator Condition
Projector Condition Note
Off
Blinking light
Steady lightGreen
Orange
Green
Orange0.5 sec On,
0.5 sec Off
2.5 sec On,
0.5 sec Off
0.5 sec On,
0.5 sec OffThe main power is off.
The projector is getting ready
to turn on.
Off Timer is enabled.
The projector is cooling down.
The projector is turned on.
The projector is in Standby.–
Wait for a moment.
–
Wait for a moment.
–
–
Indicator Condition
Projector Condition Note
Off
Blinking light
Steady lightRed
Green
Orange1 cycle
(0.5 sec On,
2.5 sec Off)
2 cycle
(0.5 sec On,
0.5 sec Off)
4 cycle
(0.5 sec On,
0.5 sec Off)
6 cycle
(0.5 sec On,
0.5 sec Off)Normal
Lamp cover error or lamp hous-
ing error
Temperature error
Fan error
Lamp error
Re-firing the lamp
Cabinet button locked–
Replace the lamp cover or lamp
housing correctly.
The projector is overheated.
Move the projector to a cooler
location.
Fans will not work correctly.
Lamp fails to light. Wait a full
minute and then turn on again.
The projector is re-firing.
You have pressed cabinet but-
ton when Cabinet Button is
locked.
Status Indicator
Indicator Condition
Projector Condition Note
Off
Blinking light
Steady lightNormal
Lamp has reached its end of life.
Lamp replacement message
will be displayed.
Lamp has been used beyond its
limit. The projector will not turn
on until the lamp is replaced.
Lamp mode is set to Eco mode. Red
Red
Green–
Replace the lamp.
Replace the lamp.
–
Lamp Indicator
7. TROUBLESHOOTING 
						

							E-49
Does not turn on
Lamp does not turn on;
POWER and STATUS
LEDs are blinking green
at the same time
Will turn off
No picture
Image isn’t square to the
screen
Color tone or hue is un-
usual•Check that the power cable is plugged in and that the power button on the
projector cabinet or the remote control is on. See pages E-19 and E-20.
•Ensure that the lamp cover or lamp housing is installed correctly. See page
E-46.
•Check to see if the projector has overheated or the lamp has reached the end
of its usable life. If there is insufficient ventilation around the projector or if
the room where you’re presenting is particularly warm, move the projector
to a cooler location.
•The lamp may fail to light. Wait a full minute and then turn on the power
again.
•The lamp has reached the end of its usable life. Replace the lamp.
•Wait for 60 seconds (cooling period)to see if the lamp turns on by itself.
POWER and STATUS LEDs blinking green at the same time indicates the
main power was interrupted during previous operation.
•Ensure that the Power Management is off. See page E-41.
•Use the VIDEO, S-VIDEO, COMPUTER or COMPONENT button on the re-
mote control or the SOURCE button on the cabinet to select your source
(Video, S-Video, Component or Computer). See page E-22.
•Ensure your cables are connected properly.
•Use menus to adjust the brightness and contrast. See page E-34.
•Reset the settings or adjustments to factory preset levels using “Reset” in
the menu. See page E-43.
•Enter your registered keyword if the Security function is enabled. See page
E-38.
•When using with a notebook PC, be sure to connect between the projector
and the notebook PC before turning on the power to the notebook PC. In
most cases signal cannot be output from RGB output unless the notebook
PC is turned on after connecting with the projector.
* If the screen goes blank while using your remote control, it may be the
result of the computer’s screensaver or power management software.
* For more detailed, see page E-51.
•Reposition the projector to improve its angle to the screen. See pages E-22
and E-23.
•Use the Keystone correction function to correct the trapezoid distortion. See
page E-25.
•Check if an appropriate color is selected in “Wall Color”. If so, select an
appropriate option. See page E-34.
•Adjust “Hue” in “Picture”. See page E-34.
Check These ItemsProblem
7. TROUBLESHOOTING
Common Problems & Solutions 
						

							E-50
Picture is blurred
Image is scrolling verti-
cally, horizontally or
both
Remote control does
not work
Indicator is lit or blink-
ing
Cross color in RGB
mode•Remove the lens cap.
•Adjust the focus. See page E-25.
•Reposition the projector to improve its angle to the screen. See pages E-22
and E-23.
•Ensure that the distance between the projector and screen is within the ad-
justment range of the lens. See pages E-11 and E-12.
•Condensation may form on the lens if the projector is cold, brought into a
warm place and is then turned on. Should this happen, let the projector
stand until there is no condensation on the lens.
•Use the VIDEO, S-VIDEO, COMPUTER or COMPONENT button on the re-
mote control or the SOURCE button on the cabinet to select the source you
want to input.
•Adjust the computer image manually with the Horizontal /Vertical Position.
See page E-37.
•Connect a source the projector supports. See Compatible Input Signal List
on page E-57.
•Install new batteries. See page E-8.
•Make sure there are no obstacles between you and the projector.
•Stand within 22 feet (7 m) of the projector. See page E-9.
•See the Power/Status/Lamp Indicator on page E-48.
•Press the AUTO ADJ. button on the projector cabinet or the remote control.
See page E-26.
•Adjust the computer image manually with the Clock and Phase in “Image” of
the menu. See page E-37.
Check These Items Problem
7. TROUBLESHOOTING 
						

							E-51
7. TROUBLESHOOTING
If there is no picture, or the picture is not displayed correctly.
•Power on process for the projector and the PC.
Be sure to connect the RGB cable between the projector and the computer before turning on the computer.
There are some notebook PCs, which do not output signal unless there is a projector or monitor connected
first.
NOTE: You can check the horizontal frequency of the current signal in the projector’s menu under Information. If it reads “0kHz”, this means there is no signal being output from the computer. See page E-42 or go to next step.
•Enabling the computer’s external display.
Displaying an image on the notebook PC’s screen does not necessarily mean it outputs a signal to the
projector. When using a PC compatible laptop, a combination of function keys will enable/disable the external
display. Usually, the combination of the ‘Fn” key along with one of the 12 function keys gets the external
display to come on or off. For example, NEC laptops use Fn + F3, while Dell laptops use Fn + F8 key combi-
nations to toggle through external display selections.
•Non-standard signal output from the computer
If the output signal from a notebook PC is not an industry standard, the projected image may not be displayed
correctly.
Should this happen, deactivate the notebook PC’s LCD screen when the projector display is in use. Each
notebook PC has a different way of deactivate/reactivate the local LCD screens as described in the previous
step. Refer to your computer’s documentation for detailed information.
•Image displayed is incorrect when using a Macintosh
When using a Macintosh with the projector, set the DIPswitch of the Mac adapter (not supplied with the
projector) according to your resolution. After setting, restart your Macintosh for the changes to take affect.
For setting display modes other than those supported by your Macintosh and the projector, changing the DIP
switch on a Mac adapter may bounce an image slightly or may display nothing. Should this happen, set the
DIP switch to the 13 fixed mode and then restart your Macintosh. After that, restore the DIP switches to a
displayable mode and then restart the Macintosh again.
NOTE: A Video Adapter cable manufactured by Apple Computer is needed for a PowerBook which does not have a mini D-Sub 15-pin connector.
•Mirroring on a PowerBook
* When using the projector with a Macintosh PowerBook, output may not be set to 1024 x 768 unless “mirror-
ing” is off on our PowerBook. Refer to owner’s manual supplied with your Macintosh computer for mirroring.
•Folders or icons are hidden on the Macintosh screen
Folders or icons may not be seen on the screen. Should this happen, select [View] → [Arrange] from the Apple
menu and arrange icons. 
						

							E-52
8. SPECIFICATIONS
8. SPECIFICATIONS
This section provides technical information about the LT180 Projectors performance.
Model Number LT180
Optical
DMD Single Chip Digital Micromirror Device (DMD)
Resolution 1024
768 pixels* up to 1080i with scaling technology
Lens Manual zoom and focus
F2.0 - 2.48  f=19.7 mm - 23.0 mm
Lamp 210W DC (168W Eco mode)
Image Size 30 - 200 diagonal
Projection Distance 31.4 - 220.4 (wide) / 37.7 - 262.2 (tele)
0.80 m - 5.60 m (wide) / 0.96 m - 6.66 m (tele)
Projection Angle 12.2° - 12.8° (wide) / 10.3° - 10.8° (tele)
Electrical
Inputs 1  V G A (Mini D-Sub 15 Pin), 1 S-Video (Mini DIN 4 Pin), Video (RCA),
1 Component (Y, Cb/Pb, Cr/Pr), 1 Stereo Mini Audio, 1 Audio L/R (RCA), 1 PC
Control (Mini DIN 8 Pin)
Outputs 1RGB (Mini D-Sub 15 Pin), 1 Stereo Mini Audio
Video Compatibility NTSC, NTSC4.43, PAL, PAL-60, PAL-N, PAL-M, SECAM, Component:1080i,
720p, 576p, 480p, 576i, 480i
Scan Rate Horizontal: 15 kHz to 100 kHz (RGB: 24 kHz or over) / Vertical: 50 Hz to 85 Hz
Color Reproduction 16.7 million colors simultaneously, Full color
Horizontal Resolution NTSC / NTSC4.43/PAL / YCbCr: 540 TV lines
SECAM: 300 TV lines
RGB: 1024 dots (H)
768 dots (V)
External Control IR, RS232C
Sync Compatibility Separate Sync / Composite Sync / Sync on G
Built-in Speaker 1W (Monaural)
Power Requirement 100 - 240V AC, 50 / 60 Hz
Input Current 3.2 - 1.5A
Power Consumption 280W in Lamp Normal mode
220W in Lamp Eco mode
7.0W in Standby mode
* Effective pixels are more than 99.99% 
						

							E-53
8. SPECIFICATIONS
Mechanical
Installation Orientation Desktop/Front, Desktop/Rear, Ceiling/Front, Ceiling/Rear
Dimensions 7.4 (W)
4.4 (H)
13.3 (D)
187mm (W)
113mm (H)
337mm (D)
(not including protrusions)
Net Weight 6.4 lbs / 2.9 kg
Environmental Considerations
Operational Temperatures: 41°F to 95°F (5°C to 35°C), 20% to 80% humidity
(non-condensing)
Storage Temperatures: 14°F to 122°F (-10°C to 50°C), 20% to 80% humidity
(non-condensing)
Regulations UL/C-UL Approved (UL 60950, CSA 60950)
Meets DOC Canada Class B requirements
Meets FCC Class B requirements
Meets AS/NZS CISPR 22  Class B
Meets EMC Directive (EN55022, EN55024, EN61000-3-2, EN61000-3-3)
Meets Low Voltage Directive (EN60950, TÜV GS Approved)
For additional information visit:
US : http://www.necvisualsystems.com
Europe : http://www.neceurope.com/
Global : http://www.nec-pj.com/
The specifications are subject to change without notice.