NEC Lt157 Lcd Projector Users Manual

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Terminology
PC card
ATA card
CompactFlash
TYPE (I, II and III)
BMP
JPEGThis is the name of a card currently being standardized by the Japan Electronic Industry Association (JEIDA) and PCMCIA
(Personal Computer Memory Card Interface Association) of the United States.
A type of PC card.  ATA was originally a type of interface between computers and fixed disk devices.  The ATA card is a standard
card-type recording medium.
CompactFlash card is a small removable card conforming to ATA specifications....

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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 1500 hours (2500 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 1500 (2500 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 FiltersThe air-filter sponge keeps the inside of the LT158/LT157 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 filter cover.
•Your...

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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 vertically,
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?
•Is 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 to 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 LT158/LT157 Projector ’s performance.
Model Number LT158/LT157
Optical
LCD Panel 0.9 ” p-Si TFT active-matrix, 1024 
768 dots
With Micro Lens Array
Lens Manual zoom, manual focus F1.7 – 2.1    f=36.5  – 43.7 mm
Lamp 130W NSH lamp (110W in Eco mode) The lamp, under normal operating conditions, is warranted for 1500 hours of operation time within 6 months.
Image Size 25  – 300 inches (0.64  – 7.62 m) diagonal
Projection Distance...

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MENU
ENTERCANCEL
SELECT
POWERSTATUS ON
/STAND BY
SOURCE
AUTO  
ADJUST
PC  CARD 
ACCESS
207 (8.15")
40.35 (1.59")
19.7
(0.78") 40.3 (1.59")31.2 (1.23")
63 (2.5")
5 (0.2")
266 (10.47")
Cabinet Dimensions
Unit = mm (inch)
LT158/LT157
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
1 Red Cr
2 Green or Sync on Green Y
3 Blue Cb
4 Ground
5 Ground
6 Red Ground Cr Ground
7 Green Ground Y Ground
8 Blue Ground Cb Ground
9 No 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
LT157 LT158
Pin No. Signal...

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Compatible Input Signal List
Signal Resolution Frequency H. Refresh Rate Dot Clock
( Dots ) ( kHz ) ( Hz ) ( MHz )
NTSC–15.734 60–PA L–15.625 50–SECAM–15.625 50–VESA 640
480 31.47 59.94 25.175IBM 640
480 31.47 60 25.175MAC 640
480 31.47 60 25.175MAC 640
480 34.97 66.67 31.334MAC 640
480 35 66.67 30.24VESA 640
480 37.86 72.81 31.5VESA 640
480 37.5 75 31.5IBM 640
480 39.375 75 31.49VESA 640
480 43.269 85.01 36IBM 720
350 31.469 70.09 28.322VESA 720
400 37.927 85.04 35.5IBM 720
350 39.44 87.85...

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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
LT157
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 03H 00H...