Page 2 - Features; making visually appealing presentations.; High cost effective resource-saving design; About Trademarks
E-2 Thank you for purchasing the NEC DT20 LCD Projector.Please read this manual carefully in order to use the projector properly.After reading this, please keep it in a safe place together with the warranty sheet. ● Features • Three handy features in a single body. The projector for the multimedia a...
Page 3 - Warnings and Safety Precautions; Warning Symbols; NOTE; : This indicates an item that you should take care of when handling; Safety Precautions; WARNING; • If a fault occurs:
E-3 Warnings and Safety Precautions ● Warning Symbols To alert the user to important safety precautions, the following symbols are usedin this manual and on the product. Make sure you understand what these sym-bols mean before operating the projector. WARNING : Death or serious injury may result if ...
Page 4 - CAUTION
E-4 • Do not look through the lens. • Do not look through the lens into the projector during operation. The powerfulrays passing through the lens could damage the eyes. • Do not put the projector in unstable places. • Do not put the projector in unstable places such as on unstable desks orslopes.Doi...
Page 5 - Contact the retailer if you require new packaging.
E-5 • Care of the projector • To prevent risk of accidents, always disconnect the power plug before clean-ing the projector. • Clean the lens surface with a commercial blower or lens cleaning paper.Wiping with tissue paper or a handkerchief can damage the lens. • To clean the cabinet, operation pane...
Page 8 - Contents
E-8 Contents Part Names and Functions ............................................................ E-9 Projector ................................................................................................................... E-9 Terminal Panel .......................................................
Page 9 - Part Names and Functions; Projector; Extended; Handle; Retracted; Adjustable Feet; About the anti-theft lock
E-9 Part Names and Functions Part Names and Functions Projector Lens cap Adjustable Feet ■ Extended Press lightly on the left side of the handle and it rotates 180˚ and comes out. Handle ■ Retracted Rotate the handle while pressing on its right side to store it. Remote Control Sensor Focus adjuster ...
Page 11 - Terminal Panel
E-11 Part Names and Functions ■ Terminal Panel q PC Video Input w PC Audio Input e RGB Video Output r Test (maintenance) t Audio Output y S-VIDEO Input u Video Source Video Input i Video Source Audio Input w y u i e r q t TEST PC AUDIO IN2 PC AUDIO IN1 PC AUDIO OUT S-VIDEO VIDEO RGB-OUT RGB-IN 2 RGB...
Page 12 - Buttons and Indicator Lights; w e r
E-12 ■ Buttons and Indicator Lights OHP SCROLL ON/STANDBY LAMP/COVER TEMP BRIGHTNESS ZOOM POWER MENU MUTE KEYSTONE PC1/PC2 VIDEO o !0 !1 w e r q y u i t Name q POWER Button w TEMP LED e LAMP/COVER LED r ON/STANDBY LED t INPUT SELECT Buttons(OHP, PC1/PC2, VIDEO) y KEYSTONE Button u MUTE Button i BRIG...
Page 15 - Remote Controller
E-15 Part Names and Functions Remote Controller MENU ZOOM RESIZE OHP BRIGHTNESS PC1/PC2 VOLUME VIDEO OHP STORED IMAGE ROTATION POSITION V H P in P LIVE IMAGE KEYSTONE FREEZE POINTER/SET POWER POINTER TYPE REFRESH MUTE q t !1 !2 !7 !3 yu w i o !0 r e , !4!5 !6 Name q POWER Button w POINTER TYPE Butto...
Page 17 - Remote Control Operations; the remote sensor on the main unit.; Return the battery compartment cover; Battery Replacement; Remove the battery compartment cover
E-17 Part Names and Functions ■ Remote Control Operations • Use the remote control within about seven meters (7.7 yards) from the remote control sensors (on the front and rear sides) of the projector and within 10 degrees to the left andright. This distance may become shorter as the battery wears do...
Page 18 - How to Install the Projector; Installation Sequence; End
E-18 How to Install the Projector ■ Installation Sequence ■ Adjusting the Tilt The position and tilt angle of the projected image can be adjusted by adjusting the adjustablefeet. Press both the left and right tilt adjustment levers to lift the main unit, and release themwhen the desired height is re...
Page 19 - Projection Distance and Projected Image Size; from the front of the lens. Install the projector within this range.; Installation location
E-19 How to Install the Projector ■ Projection Distance and Projected Image Size Use the following diagrams to determine the projected image size and the type of screenrequired for any given projector location. • The projection distance that provides good focusing is 1.4 m (1.5 yd) to 13.9 m (15.2 y...
Page 20 - Typical Installation; Select the installation site; Place the projector on an even and stable surface such as a table.
E-20 ■ Typical Installation 1. Select the installation site Place the projector on an even and stable surface such as a table. 2. Connect the power cord (supplied), and press the POWER button (or POWER button.) 3. Turn the direction of the lens so that it is perpendicular to the screen. Turn the uni...
Page 21 - Compensating Keystone; Keystone menu
E-21 How to Install the Projector ■ Compensating Keystone If the projected image is distorted, you can eliminate the distortion by doing keystonecompensation. ● How to Compensate Keystone Press the KEYSTONE button (or the KEYSTONE button on the remote controller) to display the “Keystonemenu.” Press...
Page 22 - Cautions on Connection; Connecting to a Personal Computer; List of cables and adapters; Manufacturer; Type
E-22 Connecting to a Personal Computer CAUTION Cautions on Connection • Before connecting other devices, turn off each device to protect the projector and other connected devices.• For details of how to connect and use devices connected to the projector, refer to the User’s Manual for each device. •...
Page 23 - About the PC Input and Output; About RGB Video Output; Signal timing
E-23 Connecting to a Personal Computer About the PC Input and Output The 15-pin mini D-Sub connectors are used for the PC input and output terminals. Thefollowing shows the relationship between the pins and the input and output signals. q RED VIDEO y GND !1 NC w GREEN VIDEO u GND !2 Pull up (+5V) e ...
Page 24 - Verify the functions of the notebook PC.; When Images on the Personal Computer Screen are not Projected; When images are not projected; Procedure example; key together with one of the keys,; summary of all connections.; List of remedies when connection trouble with the PC occurs
E-24 ● Images are not projected correctly even though they are displayed normallyon the notebook PC screen 1 Verify the functions of the notebook PC. Even if the LCD screen of a notebook PC displays normal images, the projected imagesmay be displayed incorrectly. In most cases, because of the limita...
Page 25 - Input Signal Compatibility Table (PC video input terminal); The DT20 suppor ts the signals marked by
E-25 Connecting to a Personal Computer Signal Name Resolution Horizontal Frequency Vertical Frequency Compatibility (Horizontal ✕ Vertical) (kHz) (Hz) NTSC RGB - - 15.7 60 ✕ PAL/SECAM RGB - - 15.6 50 ✕ VGA-GR1 640 480 31.5 60 ● VGA-GR2* 640 400 31.5 70 ● VGA-GR3* 640 350 31.5 70 ● VGA-TX1* 720 400 3...
Page 26 - Basic connections; Connecting to IBM NOTE and Compatible
E-26 ● Basic connections NOTE • The personal computer has input terminals for both image and sound for “1” and “2”. Hook up the sound and image to the corresponding terminals. If they are not hooked up to the corresponding terminals, the image andsound will not be output correctly. • See page E-11 f...
Page 27 - Connecting to an IBM Desktop and Compatible; Connecting to Apple Macintosh Notebook
E-27 Connecting to a Personal Computer ● Connecting to an IBM Desktop and Compatible NOTE When connecting the projector directly to the PC without using the monitor supplied with the PC, you can connectby the supplied cable only. ● Connecting to Apple Macintosh Notebook Excluding Power Book Duo, 100...
Page 28 - Connecting to a Video Source or DVD Player
E-28 ■ Connecting to a Video Source or DVD Player Images from a video source or DVD player can be projected on a large screen. NOTE • When both VIDEO and S-VIDEO are connected, S-VIDEO is given higher display priority.• Before using the video source or DVD player, close the materials cover. (Otherwi...
Page 29 - Basic Operation; Preparation; Connect the power cord.; The projector is in the standby mode, and the power indicator; Select the external input device.; Remote Control Operation; OHP
E-29 Basic Operation Basic Operation ■ Preparation 1 Connect the power cord. The projector is in the standby mode, and the power indicator LED lights (red). Press the POWER button. The fan spins, the LED lights, andthe ON/STANDBY LED lights (green).The LAMP/COVER LED lights (green).If the LAMP/COVER...
Page 30 - Basic Operations in the OHP Mode; Adjust the size of the projected image.; See “Compensating Keystone” on page E-21.; Check the OHP’s initial screen.; Main Unit Operation
E-30 ■ Basic Operations in the OHP Mode NOTE The projected image in the OHP display (projection of actual object) may be slightly distorted as a very wide-angle lens is used. 1 Adjust the size of the projected image. Rotate the zoom adjuster on the projection lens to adjust thesize of the projected ...
Page 31 - Set the object you want to project.; Close the materials cover.; Adjust the brightness.; Pressing the; button on the remote; button on the remote controller) lightens; Switch the orientation of the projected image.
E-31 Basic Operation 5 Set the object you want to project. Open the materials cover, and place the document or printedmatter you want to project on the scanner.A video image of the projected material appears in thewindow. Close the materials cover. NOTE O b j e c t s c a n b e p r o j e c t e d eve ...
Page 32 - the; Move the zooming position.
E-32 8 Freeze the projected image. Press the REFRESH/FREEZE button to project a frozenimage, of the material that you set in step five, on the whitearea of the projected image. 9 Close the window. Press the LIVE IMAGE button to close the window that isdisplayed, the entire projected image freezes. 1...
Page 33 - Make the projected image live.; button: Display the image previous to the currently
E-33 Basic Operation 12 Project a full-screen image. When projecting a vertical image, press the RESIZE button toswitch between a projected image that fills the screen fromside to side or to one that fills the screen from top to bottom.(You can switch them even when adjusting the zoom.) 13 Make the ...
Page 34 - Press the SCROLL button to move the pointer.; Select the type of pointer.; icon is displayed on the top right side of the
E-34 15 Display the pointer. Press the SET/POINTER button to display the pointer. Pressit again to hide the pointer. Press the SCROLL button to move the pointer. NOTE Adjusting the zoom or the brightness while the pointer is displayed may cause it to disappear momentarily, but itwill reappear after ...
Page 35 - Document Orientation and Scan Size; A4 horizontal orientation; High definition
E-35 Basic Operation Document Orientation and Scan Size Place the document or printed matter face down at the orientation shown in the figure below. The maximum size that documents or printed matter can be scanned is 216 mm/8.5 in(ver tical) and 288 mm/11.3 in (horizontal). For this reason, the proj...
Page 36 - Displaying OHP stored image; refreshed image that was stored to be displayed.
E-36 Displaying OHP stored image Pressing the OHP STORED IMAGE VOLUME buttons display and switch the stored images in the internal memory. VOLUME OHP STORED IMAGE button: Displays the image previous to the stored image that is currently displayed. VOLUME OHP STORED IMAGE button: Displays the image f...
Page 37 - Basic Operation of PC or Video Input; button on the remote controller) lightens the
E-37 Basic Operation ■ Basic Operation of PC or Video Input 1 Adjust the size of the projected image. Rotate the zoom adjuster on the projection lens to adjust thesize of the projected image. 2 Adjust the focus. Adjust the focus adjuster on the projection lens until theprojected image is sharp. 3 Co...
Page 38 - Adjust the zoom ratio.
E-38 5 Adjust the zoom ratio. You can adjust the zoom between 1x to 4x.Pressing the ZOOM button (or the button on the remote controller) reduces the image, and pressing the ZOOM button (or the button on the remote controller) enlarges the image. 6 Move the zooming position. Press the arrow buttons o...
Page 39 - Press the; button to reduce the volume.; button to increase the volume.; Freeze the projected image.
E-39 Basic Operation 9 Select the type of pointer. You can switch the type of pointer with the POINTER TYPEbutton on the remote controller. (Select from , , or .) You can also select the type from “Pointer type” on the“Setting 2” menu. See page E-45 for details. 10 Adjust the volume. Press the VOLUM...
Page 40 - icon is displayed on the top right side of the projected
E-40 12 Display images from the personal computerand the video at the same time. If you select personal computer input while a video source and apersonal computer are both connected, you can display videoimages in the window at the lower right side of the projected image.Set “Picture in Picture” to ...
Page 41 - How to Quit; Disconnect the power cord.; The ON/STANDBY LED on the operation panel goes out.
E-41 Basic Operation ■ How to Quit 1 Turn the lamp off. Press the POWER button. (Hold down for at least onesecond.) “Press POWER button again to turn off.” is displayed on theprojected image. Press the POWER button again.The LAMP/COVER LED blinks green, and then goes out afterabout one minute.The ON...
Page 42 - Performing Various Adjustments; Menu Structure; button on the remote controller) again and the Main menu
E-42 ■ Performing Various Adjustments Menu Structure You can perform various adjustments and make various settings by operating the buttonswith the menu display displayed on the projected image.There are two menus, the “Quick menu” on which there are frequently used items, and the“Main menu” on whic...
Page 43 - Description of Menu Items; Image Adjustment (when PC input is selected)
E-43 Basic Operation Description of Menu Items The following describes each of the menu displays, and the items and functions that can beset in these menu displays. For details of how to set these menu items, see “BasicOperation” on page E-47. ◆ Image Adjustment (when PC input is selected) <Image...
Page 44 - Sync Adjustment (only when PC input is selected)
E-44 ◆ Image Adjustment (when OHP is selected) <Image Adjustment Menu> ◆ Sync Adjustment (only when PC input is selected) <Sync Adjustment Menu> NOTE Menu items sometimes cannot be adjusted within the range -100 to +100 depending on the PC input signal. Menu Item Red Blue Image mode Gamm...
Page 47 - button on the; The main menu is displayed.
E-47 Basic Operation ■ Basic Operation The following describes basic operations in the following menus: “Image Adjustment”, “SyncAdjustment”, “Setting”, “Language Selection”, “Video Adjustment”, and “Projection Mode” . 1 Press the MENU button (or the MENU button on the remote controller). The main m...
Page 48 - When selecting “ON” or “OFF”.; The menu for the item you want to set is displayed.; “Setting” or “Video adjustment” menus.; Clock
E-48 Main Unit Operation Remote Control Operation 4 -1 Press the buttons to select the item you want to set. <Example: When “Auto power off ” is selected> When selecting “ON” or “OFF”. Menu items that require selection of “ON” or “OFF” are“Auto power off ”, “Start up display”, and “Economy mod...
Page 49 - When adjusting in single point units
E-49 Basic Operation Main Unit Operation Remote Control Operation MENU ZOOM RESIZE OHP BRIGHTNESS PC1/PC2 VOLUME VIDEO OHP STORED IMAGE ROTATION POSITION V H P in P LIVE IMAGE KEYSTONE FREEZE POINTER/SET POWER POINTER TYPE REFRESH MUTE 4 -1 SCROLL MENU SET RESIZE POINTER 4 -1 4 -2 4 -2 Press the but...
Page 50 - Others;
E-50 Main Unit Operation Remote Control Operation MENU ZOOM RESIZE OHP BRIGHTNESS PC1/PC2 VOLUME VIDEO OHP STORED IMAGE ROTATION POSITION V H P in P LIVE IMAGE KEYSTONE FREEZE POINTER/SET POWER POINTER TYPE REFRESH MUTE 4 -1 , 5 SCROLL MENU SET RESIZE POINTER 4 -2 4 -2 Press the buttons to adjust th...
Page 51 - Quick Menu; button on the remote controller) to display the quick menu.; When OHP Is Selected
E-51 Basic Operation ■ Quick Menu The Quick menu has frequently used items. This section describes the items and functionsthat can be set on the Quick menu.Press the MENU button (or the MENU button on the remote controller) to display the quick menu. Description of Menu Items ◆ When OHP Is Selected ...
Page 52 - Maintenance; Fault Protection; When the temperature LED is blinking or on.; Action
E-52 Maintenance ■ Fault Protection Your projector is provided with internal protection circuits for preventing fire and damage tointernal components due to abnormal temperature. ● When the LAMP/COVER LED is blinking: ❍ Action 1. Disconnect the power plug from the power outlet.2. Correctly install t...
Page 53 - When the power fails (all LEDs are off when the power is turned ON)
E-53 Maintenance ● When the power fails (all LEDs are off when the power is turned ON) ❍ Action 1.Disconnect the power plug from the power outlet.2.Check the following and take corrective actions. Use your projector within an ambient temperature of 0 ° C to 35 ° C (32 ° F to 95 ° F). Is the ambient ...
Page 54 - Lamp Unit Replacement; the cumulative usage time of the lamp is more than 1400 hours.); Procedure
E-54 ■ Lamp Unit Replacement The target replacement time of the lamp used on this projector is 1400 hours. (This may beshortened depending on the conditions of use.) Since there is a high possibility of lampexplosion if the cumulative usage time exceeds more than 1500 hours, the power to thelamp is ...
Page 55 - Loosen the lamp unit retaining screws.
E-55 Maintenance 2 Loosen the lamp unit retaining screws. Loosen the lamp unit screws. (2 pieces) 3 Draw out the lamp unit. Hold the handle and lift the lamp unit upward. 4 Install a new lamp unit. q Hold the lamp unit and push it in. w Make sure that the two positioning protrusions fitproperly into...
Page 56 - Cleaning the Air Filter; Caring for the Air Filter and Cautions
E-56 ■ Cleaning the Air Filter The air filter is an important part as it keeps the optical components inside your projectorfree from dirt and dust. A clogged air filter can cause the temperature to rise inside yourprojector and the fan speed to increase. This, in turn, may reduce lamp life or cause ...
Page 57 - Troubleshooting; Symptom
E-57 Troubleshooting Page(s) Troubleshooting If you think a problem has occurred, check the following items before asking for a repair. Symptom Power is not on. E-20 The projection lamp does not light. E-54 E-54 E-56 E-52 E-54 No image is displayed. E-29 E-22, 28 E-43 E-24 E-24 The image is distorte...
Page 58 - Specifications; Model Name
E-58 Specifications Specifications Model Name Type LCD Panel Size Drive SystemNumber of PixelsArrangement Projection LensOptical Source Image SizeColor ReproducibilityBrightnessScan FrequencyMaximum Resolution At RGB signal input OHP Scanner PC Signal system (Analog Video signal RGB Input) Sync Sign...
