NEC LT85 - MultiSync SVGA DLP Projector Service-Handbuch

Visual Systems Division

Technical Bulletin

LT85 Throw Distance Data

Desktop and Ceiling Mount Rev. 1.6

Page 1

Contents

Product Description, Lens Specs, Notes & Formulas Page 1

Projection Distances and Screen Sizes

Desktop Setup Page 2

Ceiling Mount Installation Page 3

Cabinet Dimensions

Top, Front and Right Side Page 4

Bottom, Back and Left Side Page 5

Timing Chart Page 6

PC Control Codes Page 7

Product Description

Type: Single chip DLP projector Dimensions: 9.4”(W) x 2.1”(H) x 7.7”(D) (not incl. Protrusions)

Native Resolution: 800 x 600 Weight: 3.3 lbs

Brightness: 800 ANSI Lumens

Lens Specifications

Manual Focus (No Zoom) F3.0 f = 20.3mm

Screen Sizes: 36" -200" diagonal

Throw Ratio: 1.64 -1.69:1 (dependent on screen size and focus setting)

Offset Angle: 17.0°–17.2°

Notes

§For Screen Sizes of 36 to 200 inches not indicated on the projection tables, use the formulas below.

§If the figures on the tables do not match the figures in the formulas, use the figures in the table.

§The ceiling must be strong enough to support the LCD projector and the installation must be in accordance with any local

building codes.

•All calculations are based on screen with. (regardless of aspect ratio)

•Distances are in inches, for millimeters multiply by 25.4.

•Distances may vary ±5%.

Formulas

Units: Inches (for millimeters multiply final number by 25.4)

D = Screen Diagonal (4:3)

H= D x 0.8 H= Screen Width (4:3)

V= D x 0.6 V= Screen Height (4:3)

B= 0.5222H B= Vertical distance between lens center and screen center

C= 1.696H –0.1344 C= Throw distance

D = 0.1472H D= Vertical distance between lens center and top of screen (bottom of screen for

desktop application)

α= tan-1(B / C) α= Throw angle

Visual Systems Division

Technical Bulletin

LT85 Throw Distance Data

Desktop and Ceiling Mount Rev. 1.6

Page 2

Projection Distance and Screen Size for Desktop

The following shows the proper relative positions of the projector and screen. Refer to the table to determine the position of

installation.

Distances are in inches. For millimeters multiply by 25.4.

Desktop Setup

Lens Ctr

Screen Bottom

Screen Ctr

Throw Distance

1.5"

Distance Chart

Note:

For screen sizes of 36 to 200 inches not indicated on the projection tables, use the formulas on page 1.

Screen Size BCDα

Diagonal Width (H) Height (E)

40" 32" 24" 16.7" 54.7" 4.7" 17.0°

60" 48" 36" 25.1" 81.9" 7.1" 17.0°

67" 53.6" 40.2" 28.0" 90.8" 7.9" 17.1°

72" 57.6" 43.2" 30.1" 97.6" 8.5" 17.1°

84" 67.2" 50.4" 35.1" 113.8" 9.9" 17.1°

90" 72" 54" 37.6" 122.0" 10.6" 17.1°

100" 80" 60" 41.8" 135.8" 11.8" 17.1°

120" 96" 72" 50.2" 162.6" 14.2" 17.1°

150" 120" 90" 62.8" 203.5" 17.8" 17.1°

180" 144" 108" 75.3" 244.1" 21.3" 17.1°

Visual Systems Division

Technical Bulletin

LT85 Throw Distance Data

Desktop and Ceiling Mount Rev. 1.6

Page 3

Projection Distance and Screen Size for Ceiling Mount Installation

The following diagram shows the relationship between projector position and the screen.

Distances are in inches. For millimeters multiply by 25.4.

Ceiling Mount Installation

Lens Ctr

Screen Top

Screen Ctr

Throw Distance

150

2.96

Lens Offset from

Ctr of Projector

Distance Chart

Note:

For screen sizes of 36 to 200 inches not indicated on the projection tables, use the formulas on page 1.

Screen Size BCDα

Diagonal Width (H) Height (E)

40" 32" 24" 16.7" 54.7" 4.7" 17.0°

60" 48" 36" 25.1" 81.9" 7.1" 17.0°

67" 53.6" 40.2" 28.0" 90.8" 7.9" 17.1°

72" 57.6" 43.2" 30.1" 97.6" 8.5" 17.1°

84" 67.2" 50.4" 35.1" 113.8" 9.9" 17.1°

90" 72" 54" 37.6" 122.0" 10.6" 17.1°

100" 80" 60" 41.8" 135.8" 11.8" 17.1°

120" 96" 72" 50.2" 162.6" 14.2" 17.1°

150" 120" 90" 62.8" 203.5" 17.8" 17.1°

180" 144" 108" 75.3" 244.1" 21.3" 17.1°

Visual Systems Division

Technical Bulletin

LT85 Throw Distance Data

Desktop and Ceiling Mount Rev. 1.6

Page 4

Cabinet Dimensions

The following diagrams show the cabinet dimensions for the MultiSync LT85/150.

Dimensions are in inches. For millimeters multiply by 25.4.

AUTO

ADJUST

SOURCE

POWER

STATUS ON/

STAND BY

ENTER

CANCEL

SELECT

PC CARD ACCESS

‚`•@‚s‚d‚w‚`‚r•@‚h‚m‚r‚s‚q‚t‚l‚d‚m‚s‚r•@‚s‚d‚b‚g‚m‚n‚k‚n‚f‚x

‚c‚k‚o

2.09 7.72

9.37 1.71

0.335

1.16

Visual Systems Division

Technical Bulletin

LT85 Throw Distance Data

Desktop and Ceiling Mount Rev. 1.6

Page 5

Cabinet Dimensions (continued)

The following diagrams show the cabinet dimensions for the MultiSync LT85/150.

Dimensions are in inches. For millimeters multiply by 25.4.

USB

AC IN•`

PC CARD

AUDIO S-VIDEO•£VIDEO

PC CONTROL•£

RGB

1.69 5.24

0.925 6.87

M4(DEPTH 5mm)

M4 (DEPTH 4mm) M4(DEPTH 15mm)

0.217

0.098

Visual Systems Division

Technical Bulletin

LT85 Throw Distance Data

Desktop and Ceiling Mount Rev. 1.6

Page 6

Timing Chart

Y/N Signal Resolution Refresh Rate Frequency H. Dot Clock

( Dots ) ( Hz ) ( kHz ) ( MHz)

Y NTSC 640 x 480 60 15.734 –

YPAL 768 x 576 50 15.625 –

YSECAM 768 x 576 50 15.625 –

YVESA 640 x 480 59.94 31.47 25.175

YIBM 640 x 480 60 31.47 25.175

YMAC 640 x 480 60 31.47 25.175

YMAC 640 x 480 66.67 34.97 31.334

YMAC 640 x 480 66.67 35 30.24

YVESA 640 x 480 72.81 37.86 31.5

YVESA 640 x 480 75 37.5 31.5

YIBM 640 x 480 75 39.375 31.49

YVESA 640 x 480 85.01 43.269 36

YIBM 720 x 350 70.09 31.469 28.322

YVESA 720 x 400 85.04 37.927 35.5

YIBM 720 x 350 87.85 39.44 35.5

YIBM 720 x 400 87.7 39.375 35.5

YVESA 800 x 600 56.25 35.16 36

YVESA 800 x 600 60.32 37.879 40

YVESA 800 x 600 72.19 48.077 50

YVESA 800 x 600 75 46.88 49.5

YVESA 800 x 600 85.06 53.674 56.25

#Y MAC 832 x 624 74.55 49.725 57.283

#Y VESA 1024 x 768 43 Interlace 35.5 44.9

#Y VESA 1024 x 768 60 48.363 65

#Y VESA 1024 x 768 70.07 57.476 75

#Y IBM 1024 x 768 72.03 58.131 79

#Y MAC 1024 x 768 74.93 60.241 80

#Y VESA 1024 x 768 75.03 60.023 78.75

#Y VESA 1024 x 768 85 68.677 94.5

##Y VESA 1152 x 864 75 67.5 108

##Y MAC 1152 x 870 75.06 68.681 100

##Y SUN 1152 x 900 65.95 61.796 92.94

##Y SGI 1152 x 900 76.05 71.736 105.6

##Y VESA 1280 x 960 60 60 108

##Y SGI 1280 x 1024 60 63.9 107.35

##Y VESA 1280 x 1024 60.02 63.981 108

##Y MAC 1280 x 1024 60.38 64.31 107

##Y MAC 1280 x 1024 65.2 69.9 118.5

##Y HP 1280 x 1024 72.01 78.125 135

##Y SUN 1280 x 1024 76.11 81.13 135

##Y VESA 1280 x 1024 75.03 79.976 135

##Y VESA 1280 x 1024 85.02 91.146 157.5

##Y HDTV (1080i)(1125i) 1920 x 1080 60 Interlace 33.75 74.25

##Y HDTV (720p)(750p) 1280 x 720 60 Progr 45 74.25

##Y SDTV (480p)(525p) 720 x 483 59.94 Progr 31.47 27

##Y SDTV (480i)(525i) 720 x 480 59.9 Progr 15.73

##Y VESA 1600 x 1200 60 75.0

##Y VESA 1600 x 1200 65 81.3

##Y VESA 1600 x 1200 70 87.5

##Y VESA 1600 x 1200 75 93.8

##Y VESA 1600 x 1200 85 106.3

#Y: Images in above flagged with # and Y are compressed with Advanced AccuBlend on LT85 only.

##Y: Images in above flagged with ## and Y are compressed with Advanced AccuBlend on LT150 and LT85

NOTE1: Some composite sync signals may not be displayed correctly.

NOTE2: Signals other than those specified in the table above may not be displayed correctly. If this should happen, change the refresh

rate or resolution on your PC. Refer to Display Properties help section of your PC for procedures.

Visual Systems Division

Technical Bulletin

LT85 Throw Distance Data

Desktop and Ceiling Mount Rev. 1.6

Page 7

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 VIEWER 02H 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

Cable Connection

Communication Protocol:

Baud Rate: 38400 bps

Data Length: 8 bits

Parity: No Parity

Stop Bit: One bit

X on/off: None

Communications: Full duplex

PC Control Connector (DIN-8P)

To RxD of PC

345

678

To TxD of PC

To GND of PC

NOTE: Pins 2, 3, 5, 6 and 8 are used inside the projector.

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