NEC Lt240 Portable Projector Users Manual

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8. After you install a new lamp, from the menu select [Projector Options] →
[Setup] → [Page 4] → [Clear Lamp Hour Meter] to reset the lamp usage
hours.
If the projector will not be turned on after using 1600 hours (up to 2100
hours : Eco mode) of service, press and hold the [Help] button on the
remote control for ten seconds or longer to reset the lamp time clock to
zero.
Cleaning
Cleaning the Cabinet and the Lens
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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.
MAINTENANCE 
						

							E-122 Lens Protector
The lens barrel has threads on the outside for mounting a commercially
available lens protector (φ 62mm for LT260/LT220 and φ 72mm for LT240)
to protect the lens from dirt, dust, scratches and damage. Note that both a
lens protector and the supplied lens cap cannot be used at the same time.
CAUTION: Use only transparent lens protectors designed for lens protec-
tion. Use of filters for light reduction and special effects, such as ND (Neu-
tral Density) filters and color filters, can absorb heat, resulting in damage
to the filter and the projector.
MAINTENANCE 
						

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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 blinking
Green blinking
Orange blinking0.5 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.
The projector is in Sleep mode.
The projector is cooling down.
The projector is turned on.
The projector is in Standby or
Idle. Green
Orange–
Wait for a moment.
–
Wait for a moment.
–
–
Indicator Condition
Projector Condition Note
Off
Blinking light
Steady lightRed blinking
Green blinking
Orange
Green1 cycle (0.5 sec ON,
2.5 sec OFF)
2 cycle (0.5 sec ON,
0.5 sec OFF)
3 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
Temperature error
Power error
Fan error
Lamp error
Re-firing the lamp
Control key locked
Idle condition–
Replace the lamp
cover correctly.
The projector is
overheated. Move
the projector to a
cooler location.
Power unit will not
work correctly.
Fans will not work
correctly.
Lamp fails to light.
Wait a full minute and
then turn on again.
The projector is re-
firing 3 times at an
interval of 15 sec.
You have pressed
control panel key
when Control Key
Lock is enabled.
–
Status Indicator 
						

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TROUBLESHOOTING
Indicator Condition
Projector Condition Note
Off
Blinking light
Steady lightNormal
Lamp has reached its end of
life. Lamp replacement mes-
sage will be displayed.
Lamp has been used beyond
its limit. The projector will not
turn on until the lamp is re-
placed.
Lamp mode is set to Eco mode Red
Red
Green–
Replace the lamp.
Replace the lamp.
–
Lamp Indicator 
						

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Does not turn on
No picture
Image isn’t square to the
screen
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
USB mouse does not
work•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-36 and 37.
•Ensure that the lamp cover is installed correctly. See page E-120.
•Check to see if the projector has overheated or the lamp usage exceeds 1600 hours
(up to 2100 hours : Eco mode). If there is insufficient ventilation around the projec-
tor or if the room where you’re presenting is particularly warm, move the projector
to a cooler location.
•Use the menu to select your source (RGB 1/2, Video, S-Video, Viewer or LAN). See
page E-40.
•Ensure your cables are connected properly.
•Use menus to adjust the brightness and contrast. See page E-85.
•Remove the lens cap.
•Reset the settings or adjustments to factory preset levels using the Factory Default
in the Adjustment Menu. See page E-117.
•Reposition the projector to improve its angle to the screen. See page E-42 or 43.
•Use the 3DReform function to correct the trapezoid distortion. See page E-45.
•Adjust the focus. See page E-44.
•Reposition the projector to improve its angle to the screen. See page E-42 or 43.
•Ensure that the distance between the projector and screen is within the adjustment
range of the lens. See page E-22-26.
•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 menus or Source button on the remote control or the cabinet to select the
source you want to input.
•Install new batteries. See page E-19.
•Make sure there are no obstacles between you and the projector.
•Stand within 22 feet (7 m) of the projector. See page E-20.
•Make sure that you are in the Projector mode and the PJ button lights in red. If not,
press the PJ button. See page E-53.
•See the Status Indicator on pages E-123 and 124.
•If Auto Adjust is off, turn it on or adjust the image manually with the Position/Clock
in the Image Options. See pages E-87, 88 and 98.
•Make sure that your USB mouse is properly connected to the projector.
The projector may not support some brands of a USB mouse.
Problem Check These  Items
Common Problems & Solutions
TROUBLESHOOTING 
						

							E-126 When using the Viewer function
TROUBLESHOOTING
•Is “Viewer” selected from the Source menu?
•Is the PC card seated in the PC Crad slot completely?
•Are slide data stored in the PC card?
•Have the contents of the PC card been destroyed?
•While an image with over 1024
768 dots (800
600 on
LT220) is projected, several lines of information will be lost.
Use the supplied software change the image to 1024
768
(800
600 on LT220) dots in size.
•Use a computer, etc., to repair the data.
Problem Check These  Items
For more information contact your dealer. No picture
Part of a slide is not dis-
played
Contents of PC Card are
damaged 
						

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SPECIFICATIONS
This section provides technical information about the LT260/LT240/LT220 Projectors
performance
Model Number LT260/LT240/LT220
Optical
DMD™ Single Chip Digital Micromirror Device(DMD™)
Resolution 1024
768 pixels (LT220: 800
600 pixels) up to UXGA
with Advanced AccuBlend
Lens Manual zoom and focus:
LT260/LT220: F2.2 - 2.5    f=28.4mm - 34.0mm
LT240: F2.5 - 2.8    f=22.4mm - 27.0mm
Lamp 220 W DC standard
(The lamp is warranted for 1500 hours of operation time
within 6 months.)
Image Size 30 inches - 500 inches (0.8 m - 12.7 m) diagonal
Projection DistanceLT260: 3.8ft - 80.7ft / 1.18m - 24.6m
LT240: 2.95ft - 62.3ft / 0.90m - 19.0m
LT220: 4.0ft - 83.3ft / 1.22m - 25.4m
Projection AngleLT260/LT220: 14.7°-15.2°(wide) / 12.2°-12.4°(tele)
LT240: 18.6°-19.4°(wide) / 15.7°-16.2°(tele)
Electrical
Inputs 2 RGB, 1 S-Video, 1 Video, 1 PC Card, 1 Stereo Mini
Audio, 1 (L/R) RCA Audio, 1 PC Control
Outputs 1 RGB, 1 Stereo Mini Audio
USB Port 1 A Type, 1 B Type
Video Compatibility NTSC, NTSC4.43, PAL, PAL-60, PAL-N, PAL-M, SECAM,
HDTV:1080i, 720p, 480p, 480i (w/optional cable)
Scan Rate Horizontal: 15 kHz to 100 kHz (RGB: 24 kHz or over)
Vertical: 50 Hz to 120 Hz
Video Bandwidth RGB: 100 MHz (-3dB)
Pixel Clock Freq Less than 135 MHz
Color Reproduction 16.7 million colors simultaneously, Full color
Horizontal Resolution NTSC / NTSC4.43/PAL / YCbCr: 540 TV lines
SECAM: 300 TV lines
RGB:
LT260/LT240: 1024 dots (H)
768 dots (V),
LT220: 800 dots (H)
600 dots (V) 
						

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External Control RS232, IR, LAN (optional)
Sync Compatibility Separate Sync / Composite Sync / Sync on G
Built-in Speakers 2W
1 (monaural)
Power Requirement 100 - 120V AC / 200 - 240V AC, 50 / 60 Hz
Input Current 3.0A (100 - 120V AC) / 1.5A (200 - 240V AC)
Power Consumption 280W (0.6W at Standby)
Mechanical
Installation Orientation: Floor/Front, Floor/Rear, Ceiling/Front, Ceil-
ing/Rear
Dimensions 10.2 (W)
3.6 (H)
10.8 (D)
260mm (W)
92mm (H)
275mm (D)
(not including protrusions)
Net WeightLT260/LT220: 6.5 lbs / 2.9 kg
LT240: 7.1 lbs / 3.2 kg
Environmental Considerations
Operational Temperatures :
41° to 95°F (5° to 35°C), 20% to 80% humidity
(non-condensing)
Storage Temperatures  :
14° to 122°F (-10° to 50°C), 20% to 80% humidity
(non-condensing)
Regulations UL Approved (UL 1950, CSA 950)
Meets DOC Canada Class B requirements
Meets FCC Class B requirements
Meets AS/NZS3548 Class B
Meets EMC Directive (EN55022:1998, EN55024-1998,
EN61000-3-2, EN61000-3-3)
Meets Low Voltage Directive (EN60950, TUV GS Ap-
proved)
For additional information visit:
US : http://www.necvisualsystems.com
Europe : http://www.nec-europe.com/
Global : http://www.nec-pj.com/
Digital Light Processing, DLP, Digital Micromirror Device and DMD are trademarks
of Texas Instruments.
The specifications are subject to change without notice.
SPECIFICATIONS 
						

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APPENDIX
Cabinet Dimensions
Unit = mm (inch)
260 (10.24)
57 (2.24)
275 (10.83)300 (11.8) *
120 (4.7)107 (4.2)83 (3.27)
92 (3.6)
* LT240: 319mm (12.56”) 
						

							E-130 Mini D-Sub 15 Pin Connector
Pin Assignments of D-Sub RGB Input Connector
Pin No. RGB Signal (Analog) YCbCr Signal
1Red Cr
2Green or Sync on Green Y
3Blue Cb
4Ground
5Ground
6Red Ground Cr Ground
7Green Ground Y Ground
8Blue Ground Cb Ground
9No Connection
10 Sync Signal Ground
11 Ground
12 Bi-directional DATA (SDA)*
13 Horizontal Sync or Composite Sync
14 Vertical Sync
15 Data Clock*
Signal Level
Video signal : 0.7Vp-p (Analog)
Sync signal : TTL level
* RGB 1 Input only51423
10
11 12 13 14 156 978
APPENDIX