NEC Lt80 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-Sub
79
SPECIFICATIONS80 

Timing Chart
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 37.5 31.5
Y IBM 6402480 75...

PC Control Command Reference
Command Codes
No. Function Code Data Description
01 Video 03H No Same as remote
02 RGB1 04H No Same as remote
03 S-VIDEO C6H No Same as remote
04 Power  On 08H No Same as remote (See NOTE on page 88.)
05 Power  Off 14H No Same as remote
06 Picture  Mute 47H No Same as remote
07 Audio  Mute 45H No
08 Onscreen  Mute 11H No
09 Reset 43H No  (Resets immediately after returning ACK)
10 D Up DEH No Same as remote
11 D Down DFH No Same as remote
83
12 D Right DCH No Same as remote...

Command Codes (continued)
No. Function Code Data Description
27 Image mode Doc Cam 1DH No
28 Image mode Normal 1EH No
29 Image mode Natural 1FH No
30 Power  Management  On 15H No
31 Power  Management  Off 16H No
32 Digital Zoom W 89H No
33 Digital Zoom T 8AH No
34 Brightness 60H Yes 0 to 63
35 Contrast 62H Yes 0 to 63
36 Color 64H Yes 0 to 63
37 Tint 66H Yes -32 to +31(E0 to 1F)
38 Sharpness 68H Yes 0 to 3
39 Audio Volume 6AH Yes 0 to 63
40 Picture Adj 70H Yes 768 to 1279(2 byte Code)
41 Fine Picture 6EH...

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)
87
44 Err...