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 39.375 31.49
Y VESA 6402480 85.01 43.269 36
Y IBM 7202350 70.09 31.469 28.322
81
Y IBM 7202400 70.09 31.4469 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
# MAC 8322624 74.55 49.725 57.283
N VESA 10242768 43interlace 35.5 44.9
# VESA 10242768 60 48.363 65
# VESA 10242768 70.07 57.476 75
# IBM 10242768 72.03 58.131 79
# MAC 10242768 74.93 60.241 80
# VESA 10242768 75.03 60.023 78.75
N VESA 10242768 85 68.677 94.5
Incompatible signals are marked with on N and hatched. # 1024x768 and 832x624 images
are compressed into 800x600.
SPECIFICATIONS82 
						

							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
13 D Left DDH No Same as remote
14 D Right Up 21H No Same as remote
15 D Left Up 22H No Same as remote
16 D Right Down 23H No Same as remote
17 D Left Down 24H No Same as remote
18 Freeze 91H No Same as remote
19 Front Floor 33H No
20 Front Ceiling 34H No
21 Rear Floor 35H No
22 Rear Ceiling 36H No
23 Auto Start  On 19H No
24 Auto Start  Off 1AH No
25 Auto Picture  On 1BH No
26 Auto  Picture  Off 1CH No
SPECIFICATIONS84 
						

							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 Yes 0 to 31
42 H Position 72H Yes -64 to +63(C0 to 3F)
85
43 V Position 74H Yes -32 to +31 (E0 to 1F)
44 Lamp Reset 27H No
45 Language Select 3DH Yes 00:English, 01:German, 02:French, 03:Italian, 04:Spanish,
05:Swedish, 06: Japanese
SPECIFICATIONS86 
						

							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 04: Parameter Error ( parameter data abnormal)
1 2 54 36
7 8
To RxD of PC©PC Control Connector (DIN-8P)
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 housing is not attached correctly
Bit 1: Fan stoppage
Bit 2: Overheated
Bit 3: Lamp lighting failure
To TxD of PC§To GND of PC©
SPECIFICATIONS88