NEC Lt81 Projector Users Manual

D-Sub Pin Assignments
      PC 15-Pin mini D-Sub
Pin No. Signal to be connected
1 Red
2 Green
3 Blue
4 GND
5 GND
6 Red GND
7 Green GND
8 Blue GND
9 No Connection
10 Digital GND
11 GND
12 No Connection
13 Horizontal Sync
14 Vertical Sync
15 No Connection
1 2
3 4
5
11 12 13
14 15
6
7 8 9
10
  PC 15-Pin mini D-Sub99
SPECIFICATIONS 100 

Timing Chart
101
SPECIFICATIONS 102
Y/N Signal Resolution Refresh F.H. Dot
Rate (Hz) (kHz) Clk(MHz)
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 IBM 6402400 70 31.47 25.175
Y VESA 6402400 85.08 37.86 31.5
Y MAC 6402400 66 35 30.24
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 66.7 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...

103
01 Video 03H No Same as remote
02 RGB 04H No Same as remote
03 S-Video C6H No Same as remote
04 PC CARD 27H No Same as remote (available only when Viewer kit is connected to)
05 Power On 08H No Same as remote
06 Power Off 14H No Same as remote
07 Picture Mute 47H No Same as remote
08 Audio Mute 45H No
09 Onscreen Mute 11H No
10 Reset 43H No
11 D Up DEH No Same as remote
12 D Down DFH No Same as remote
13 D Right DCH No Same as remote
14 D Left DDH No Same as remote
15 D Right Up 21H No Same as...

Command Codes (continued)
No. Function Code Data Description105
SPECIFICATIONS 106 32
Display Mode Select1FH Yes 0 Normal Aspect
1 Wide Aspect
33
Power Management On15H No
34
Power Management Off16H No
35 Digital Zoom W 89H No Same as remote
36 Digital Zoom T 8AH No Same as remote
37 Brightness 60H Yes 0 (00H) ÐÐ 63 (3FH)
38 Contrast 62H Yes 0 (00H) ÐÐ 63 (3FH)
39 Color 64H Yes 0 (00H) ÐÐ 63 (3FH)
40 Tint 66H Yes -32 (E0H) ÐÐ 31 (1FH)
41 Sharpness 68H Yes 0 (00H) ÐÐ 63 (3FH)
42 Audio Volume 6AH Yes 0...

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)107
44 Err...