NEC Lt245 Portable Projector Users Manual

124
8. Appendix
Common Problems & Solutions (See also Power/Status/Lamp Indicator on page 123.)
Does not turn on
Will turn off
No picture
Color tone or hue is
unusual
Image isn’t square to
the screen
Picture is blurred
Image is scrolling
vertically, horizontally
or both
Remote control does
not work
Indicator is lit or
blinking
Vertical stripes in RGB
mode
USB mouse does not
work
Capture function is not
possible.•Check that the power cable is plugged in and that the power button on the projector cabinet...

125
8. Appendix
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...

126
8. Appendix
 Specifications
This section provides technical information about the LT265/LT245 Projectors performance.
Model Number LT265/LT245
Optical
DMD™ Single Chip Digital Micromirror Device (DMD™)
Resolution 1024 
 768 pixels* up to UXGA with Advanced AccuBlend
Lens Manual zoom and focus:
LT265: F2.1 - 2.3    f=28.2mm - 33.6mm
LT245: F2.2 - 2.5    f=22.1mm - 26.5mm
Lamp 220 W DC standard
Image Size 30 inches - 500 inches (0.8 m - 12.7 m) diagonal
Projection Distance LT265: 3.8ft - 80.7ft /...

127
8. Appendix
Mechanical
Installation Orientation: Desktop/Front, Desktop/Rear, Ceiling/Front, Ceiling/Rear
Dimensions 10.2 (W) 
 3.6 (H) 
 10.8 (D)
260mm (W) 
 92mm (H) 
 275mm (D)
(not including protrusions)
Net Weight LT265: 6.5 lbs / 2.9 kg
LT245: 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...

128
PC CARDSOURCE
AUTO ADJUST
3D REFORMLAMP
STATUS
POWER ON/STAND BYSELECT
260 (10.24) 
57 (2.24)
275 (10.83) 
LT265: 313 (12.32) / LT245: 315 (12.4)
123 (4.84)107 (4.2) 83 (3.27) 
92 (3.6)
PC CARDR  AUDIO IN  L VIDEO INCOMPUTER 1 IN  COMPUTER 2 IN MONITOR OUT AUDIO INAUDIO OUT
USB LAN
S-VIDEO INPC CONTROL
8. Appendix
 Cabinet Dimensions
Lens center
Lens center
Unit: mm (inch) 

129
Mini D-Sub 15 Pin Connector
 Pin Assignments of D-Sub COMPUTER 1/2 Input Connector
Signal Level
Video signal : 0.7Vp-p (Analog)
Sync signal : TTL level
* COMPUTER 1 IN connector only51423
10
11 12 13 14 156 978
8. Appendix
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...

130
8. Appendix
 Compatible Input Signal List
Signal Resolution Frequency H. Refresh Rate Dot Clock
( Dots ) ( kHz ) ( Hz ) ( MHz )
#:Images in above flagged with # are compressed with Advanced AccuBlend on LT265 and LT245.
NOTE: Some composite sync signals may not be displayed correctly.
Signals other than those specified in the table above may not be displayed correctly. If this should happen, change the refresh
rate or resolution on your PC. Refer to Display Properties help section of your PC for...

131
8. Appendix
Cable Connection
Communication Protocol
Baud rate ........................................ 38400 bps
Data length ..................................... 8 bits
Parity .............................................. No parity
Stop bit .......................................... One bit
X on/off .......................................... None
Communications procedure ........... Full duplex
NOTE: Depending on the equipment, a lower baud rate may be recommended for long cable runs.
 PC Control...

132
8. Appendix
 Using Software Keyboard
1 to 0 and Characters
.............................. Use to type in password or keyword.
MODE .................... Selects one of three modes for alphabet and special characters.
SP ......................... Inserts a space
BS ......................... Deletes one character backward
.......................... Returns to the previous
.......................... Advances to the next
OK ......................... Executes the selection
Cancel ......................

133
No image is displayed from your PC or video equipment to the
projector.
Still no image even though you connect the projector to the PC
first, then start the PC.
Enabling your notebook PC’s signal output to the projector.
•A combination of function keys will enable/disable the ex-
ternal display. Usually, the combination of the “Fn” key along
with one of the 12 function keys turns the external display
on or off.
No image (blue background, logo, no display).
Still no image even though you press the...