NEC Mt820 Projector Users Manual

							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
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
Y MAC 8322624 74.55 49.725 57.283
N VESA 10242768 43interlace 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 SGI 10242768 60.4 49.7 70
# MAC 11522870 75.6 68.7 100
# SUN 11522900 69.95 61.769 92.94
# SGI 11522900 76.05 71.736 105.6
# SGI 128021024 60 63.9 107.35
# VESA 128021024 60.04 64.286 108
# MAC 128021024 69.89 74.882 118.5
# HP 128021024 72.01 78.125 135
# VESA 128021024 75.03 79.976 135
# SUN 128021024 76.11 81.13 135
SPECIFICATIONS
79
80 # 11522870, # 11522900 and # 128021024 im-
ages are compressed on MT1020.
NOTE: The signals indicated by shaded area are
not supported by MT820.
# 10242768 and 8322624 images are com-
pressed into 8002600 on MT820. 
						

							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 RGB2 05H No Same as remote
04 S-VIDEO C6H No Same as remote
05 Power  On 08H No Same as remote (See NOTE on page 86.)
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 Power  Zoom  W  09H No Same as remote
11 Power  Zoom  T 0AH No Same as remote
12 Power  Focus  + 0BH No Same as remote
13 Power  Focus  Ð 0CH No Same as remote
14 Reset 43H No (Resets immediately after returning ACK)
15 D Up DEH No Same as remote
16 D Down DFH No Same as remote
17 D Right DCH No Same as remote
18 D Left DDH No Same as remote
19 D Right Up 21H No Same as remote
20 D Left Up 22H No Same as remote
21 D Right Down 23H No Same as remote
22 D Left Down 24H No Same as remote
23 Freeze 4CH No Same as remote
24 Slide + 4BH No Same as remote
25 Slide - 20H No Same as remote
26 Front Floor 33H No
27 Front Ceiling 34H No
28 Rear Floor 35H No
29 Rear Ceiling 36H No
30 Auto Start  On 19H No
31 Auto Start  Off 1AH No
32 Auto Picture  On 1BH No
33 Auto  Picture  Off 1CH No
SPECIFICATIONS
81
82 
						

							Command Codes (continued)
No. Function Code Data Description
34 Image mode Doc Cam 1DH No
35 Image mode Normal 1EH No
36 Image mode Natural 1FH No
37 Power  Management  On 15H No
38 Power  Management  Off 16H No
39 Digital Zoom W 89H No Same as remote
40 Digital Zoom T 8AH No Same as remote
41 Brightness 60H Yes 0 to 63
42 Contrast 62H Yes 0 to 63
43 Color 64H Yes 0 to 63
44 Tint 66H Yes -32 to +31(E0 to 1F)
45 Sharpness 68H Yes 0 to 3
46 Audio Volume 6AH Yes 0 to 63
47 Picture Adj 70H Yes*
MT1020: FFE0H to 001FH (-32 to +31) / MT820: 768 to 1279 (2 byte Code)
48 Fine Picture 6EH Yes MT1020: 0 to 127 / MT820: 0 to 31
49 H Position 72H Yes MT1020: -128 to +127 (80 to 7F) / MT820: -64 to +63 (C0 to 3F)
50 V Position 74H Yes MT1020: -64 to +63 (C0 to 3F) / MT820: -32 to +31 (E0 to 1F)
51 Lamp Reset 27H No
52 Language Select 3DH Yes 00:English, 01:German, 02:French, 03:Italian, 04:Spanish, 05:Swedish
SPECIFICATIONS
83
84 These commands are subject to change without notice.
*(Low-order data) (High-order data) CSUM
CSUM = Checksum is a low-order digit of the sum from the Code to the immediately
preceding data. 
						

							44 Err 04: Parameter Error ( parameter data abnormal)
1 2 54 36
7 8
To RxD of PC©PC Control Connector (DIN-8P)
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 LCD 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)
NOTE:  If failing in powering-on, the CPU returns the following NAKs:
CA Err 1
Err 1 8X (Apply the corresponding bit.)
Bit 0: Either filter panel or lamp cover is not attached correctly
Bit 1: Fan stoppage
Bit 2: Overheated
Bit 3: Lamp lighting failure
To TxD of PC§To GND of PC©
SPECIFICATIONS
85
86