NEC Lt155 Lcd Projector Users Manual

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This section describes the simple maintenance procedures you should
follow to replace the lamp and clean the filter.
Replacing the Lamp
After your lamp has been operating for 1000 hours (2000 hours : Eco
mode) or longer, the “Status” light in the cabinet will go on and the
message will appear. Even though the lamp may still be working, re-
place it at 1000 (2000 hours : Eco mode) hours to maintain optimal
projector performance.
CAUTION
•DO NOT TOUCH THE LAMP immediately after it has been used. It...

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Cleaning or Replacing the Filters
The air-filter sponge keeps the inside of the MultiSync LT156/LT155/
LT154 Projector free from dust or dirt and should be cleaned after
every 100 hours of operation (more often in dusty conditions). If the
filter is dirty or clogged, your projector may overheat.
CAUTION
•Turn off the power and unplug the projector before replacing the filter.
•Only clean the outside of the filter cover with a vacuum cleaner.
•Do not attempt to operate the projector without a...

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5. TROUBLESHOOTING
This section helps you resolve problems you may encounter while setting up or using the projector.
Power/ Status Light Messages
Common Problems & Solutions
Does not turn on
No picture
Image isn’t square to the
screen
Picture is blurred
Image is scrolling ver tically,
horizontally or both
Remote control does not
work
Status indicator is lit or blink-
ing
Cross color in RGB mode•Check that the power cable is plugged in and that the power button on the projector cabinet or the...

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•Is “PC Card Viewer” selected from the Source menu?
•Is the CompactFlash card seated in the PC CARD slot completely?
•Are slide data stored in the CompactFlash card?
•Have the contents of the CompactFlash card been destroyed?
•While an image with over 1024
768 dots is projected, several lines of information will be lost. Use the
supplied software change the image to 1024
768 dots in size.
•Use a computer, etc., to repair the data.
Condition Status
When using the PC Card Viewer function
For more...

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6. SPECIFICATIONS
This section provides technical information about the MultiSync LT156/LT155/LT154 Projector’s performance.
Model Number LT156/LT155/LT154
Optical
LCD Panel 0.9” p-Si TFT active-matrix, 1024
768 dots
With Micro Lens Array (LT156 / LT155)
Lens Manual zoom, manual focus
F2.0 – 2.3    f=36.5 – 42 mm
Lamp 130W NSH lamp (110W in Eco mode)
The lamp, under normal operating conditions, is warranted for 1000 hours of operation time within 6 months.
Image Size 25 – 300 inches (0.64 – 7.62...

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MENU
ENTERCANCEL
SELECT
POWERSTATUS ON
/STAND BY
SOURCE
AUTO  
ADJUST
PC  CARD 
ACCESS
207 (8.15)
40.35 (1.59)
17
(0.67) 40.3 (1.59)31.2 (1.23)
63 (2.5)
5 (0.2)
266 (10.47)
Cabinet Dimensions
Unit = mm (inch)
LT156/LT155/LT154
Lens center
Lens center 

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D-Sub Pin Assignments
Mini D-Sub 15 Pin 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 ClockSignal Level
Video signal : 0.7Vp-p (Analog)
Sync signal : TTL level
51423
10
11 12 13 14 156 978 

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Timing Chart
Y / N Signal Resolution Frequency H. Refresh Rate Dot Clock
( Dots ) ( kHz ) ( Hz ) ( MHz )
YNTSC 640
480 15.734 60 -
YPAL768
576 15.625 50 -
YSECAM 768
576 15.625 50 -
YVESA 640
480 31.47 59.94 25.175
YIBM 640
480 31.47 60 25.175
YMAC640
480 31.47 60 25.175
YMAC640
480 34.97 66.67 31.334
YMAC640
480 35 66.67 30.24
YVESA 640
480 37.86 72.81 31.5
YVESA 640
480 37.5 75 31.5
YIBM 640
480 39.375 75 31.49
YVESA 640
480 43.269 85.01 36
YIBM 720
350 31.469 70.09 28.322
YVESA 720
400 37.927...

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1 2 54 36
7 8
Cable Connection
Communication Protocol
Baud rate: 38400 bps
Data length: 8 bits
Parity: No parity
Stop bit: One  bit
X on/off: None
Communications Full duplex
procedure:
PC Control Connector (DIN-8P)
To RxD of PC
To TxD of PC To GND of PC
NOTE:  Pins 2, 3, 5, 6 and 8 are used inside the projector.
PC Control Codes
LT155/LT154
Function Code Data
POWER ON 02H 00H 00H 00H 00H 02H
POWER OFF 02H 01H 00H 00H 00H 03H
INPUT SELECT RGB 02H 03H 00H 00H 02H 01H 01H 09H
INPUT SELECT VIDEO 02H...

Printed in Japan
7N8P0203