NEC Lt140 Ultra-portable Projector Users Manual

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Timing Chart
Y NTSC 6402480 60 15.734 -
Y PAL 7682576 50 15.625 -
Y SECAM 7682576 50 15.625 -
Y VESA 6402350 85.08 37.86 31.5
Y MAC 6402400 66 35 30.24
Y IBM 6402400 70 31.47 25.175
Y VESA 6402400 85.08 37.86 31.5
Y VESA 6402480 59.94 31.47 25.175
Y IBM 6402480 60 31.47 25.175
Y MAC 6402480 60 31.47 25.175
Y MAC 6402480 66.67 34.97 31.334
Y MAC 6402480 66.67 35 30.24
Y VESA 6402480 72.81 37.86 31.5
Y VESA 6402480 75 37.5 31.5
Y IBM 6402480 75 39.375 31.49
Y VESA 6402480 85.01 43.269 36
Y IBM 7202350 70.09 31.469 28.322
Y VESA 7202400 85.04 37.927 40
Y IBM 7202350 87.85 39.44 35.5
Y IBM 7202400 87.7 39.375 35.5
Y VESA 8002600 56.25 35.16 36
Y VESA 8002600 60.32 37.879 40
Y VESA 8002600 72.19 48.077 50
Y VESA 8002600 75 46.88 49.5
Y VESA 8002600 85.06 53.674 56.25
#Y MAC 8322624 74.55 49.725 57.283
N VESA 10242768 43 INT 35.5 44.9
#Y VESA 10242768 60 48.363 65
#Y VESA 10242768 70.07 57.476 75
#Y IBM 10242768 72.03 58.131 79
#Y MAC 10242768 74.93 60.241 80
#Y VESA 10242768 75.03 60.023 78.75
#Y VESA 10242768 85 68.677 94.5
##Y VESA 11522864 75 67.5 108
##Y MAC 11522870 75.6 68.681 100
##Y SUN 11522900 65.95 61.796 92.94
##Y SGI 11522900 70.05 71.736 105.6
##Y VESA 12802960 60 60 108
##Y SGI 128021024 60 63.9 107.35
##Y VESA 128021024 60.02 64.286 108
##Y MAC 128021024 60.38 64.31 107
##Y VESA 128021024 69.85 74.882 126.996
##Y MAC 128021024 69.89 74.882 118.5
##Y VESA 128021024 71.99 76.75 129.54
##Y VESA 128021024 74.12 78.855 135
##Y VESA 128021024 75.03 79.976 135
N VESA 128021024 85.02 91.146 157.5 Y / N SignalResolution Refresh Rate Frequency H. Dot Clock
( Dots ) ( Hz ) ( kHz ) ( MHz )
N: Signals in above list flagged with an N and shaded are not supported.
#Y: Images in above flagged with # and Y are compressed with Advanced AccuBlend on LT84.
##Y: Images in above flagged with ## and Y are compressed with Advanced AccuBlend. 
						

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PC Control Codes
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 00H 02H 01H 06H 0EH
INPUT SELECT S-VIDEO 02H 03H 00H 00H 02H 01H 0BH 13H
INPUT SELECT PC CARD VIEWER02H 03H 00H 00H 02H 01H 1FH 27H
PICTURE MUTE ON 02H 10H 00H 00H 00H 12H
PICTURE MUTE OFF 02H 11H 00H 00H 00H 13H
SOUND MUTE ON 02H 12H 00H 00H 00H 14H
SOUND MUTE OFF 02H 13H 00H 00H 00H 15H
ON SCREEN MUTE ON 02H 14H 00H 00H 00H 16H
ON SCREEN MUTE OFF 02H 15H 00H 00H 00H 17H 
						

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Cable Connection
Communication Protocol
Baud rate: 9600 bps
Data length: 8 bits
Parity: No parity
Stop bit: One bit
X on/off: None
CommunicationsFull duplex
procedure:
If the CPU of the projector has received the data correctly, it returns an ACK(C5H). If the received data is not correct, the CPU returns
a NAK(CAH), then the following status:
Receiving success: C5
Receiving failure: CA Err
Err 01: Command Error (command not supported)
Err 02: Checksum Error
Err 03: Busy (command not acceptable)
Err 04: Parameter Error ( parameter data abnormal)
Note:  If failing in powering-on, the CPU returns the following
NAKs:
CA Err 1
Err 1 8X (Apply the corresponding bit.)
Bit 0: Lamp cover is not attached correctly
Bit 1: Fan stoppage
Bit 2: Overheated
Bit 3: Lamp lighting failure
1 2 54 36
7 8
To RxD of PC©PC Control Connector (DIN-8P)
To TxD of PC§To GND of PC© 
						

							Printed in Japan
78410871