Toshiba Projector Tdp Mt500 User Manual
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31 PICTURE... CONTRAST BRIGHTNESS0 0 COLOR TINT0 0 SHARPNESS0 Adjusting projected images Adjusting brightness of projected images (CONTRAST and BRIGHT) Items related to brightness of projected images are adjusted with menus. (Refer to Page 25 for setting menus.) 1 Reveal the picture quality setting menu. 2 Select “CONTRAST” or “BRIGHT” by pressing {, } buttons. 3 Adjust the selected item by pressing $, % buttons. To cancel the menus: 4 Press MENU button. CONTRAST ................... Adjusts vividness of projected picture images.Every time ? button is pressed, the images are made brighter and more vivid. Every time ? button is pressed, the images are made darker and less vivid. BRIGHT ..........................Every time ? button is pressed, the images are made brighter. Every time ? button is pressed, the images are made darker. Adjusting color (COLOR THICKNESS and TINT) Items related to color of projected images are adjusted with menus. (Refer to Page 25 for setting menus.) 1 Reveal the picture quality setting menu. 2 Select “COLOR THICKNESS” or “TINT” by pressing {, } buttons. 3 Adjust the selected item by pressing $, % buttons. To cancel the menus: 4 Press MENU button. COLOR THICKNESS ..... Adjusts color thickness of projected picture images.Every time ? button is pressed, the colors are made thicker. Every time ? button is pressed, the colors are made thinner. TINT ............................... Adjusts tint of projected picture images.Every time ? button is pressed, the skin color of the projected images is made more reddish. Every time ? button is pressed, the skin color is made more greenish. Setting projected images sharper or softer (SHARPNESS) Sharpness of projected images are adjusted with menus. (Refer to Page 25 for setting menus.) 1 Reveal the picture quality setting menu. 2 Select “SHARPNESS” by pressing {, } buttons. 3 Adjust sharpness by pressing $ buttons. To cancel the menus: 4 Press MENU button. Emphasizing or de-emphasizing a specified color of projected images (FOUR COLOR INDEPENDENT CONTROL) It is possible to emphasize or de-emphasize a specified color (RED, GREEN, BLUE, OR YELLOW) of projected images with menus. (Refer to Page 25 for setting menus.) 1. Reveal the professional-use picture quality setting menu. 2. Select “FOUR COLOR INDEPENDENT CONTROL” by pressing {, } buttons. 3. Press ENTER button. 4. Select a color to be set by pressing {, }• buttons. 5. Set the color by pressing $, % buttons. 6. Set the other colors by repeating no. 4 and 5. To cancel the menus: 7. Press MENU button. ICC CONTROLENTER PROFESSIONAL-PICTURE... ICC CONTROL ICC RED ICC GREEN ICC BLUE ICC YELLOW 0 0 0 0 SETTING WITH MENUS
32 Adjusting whiteness degree of white color of projected images (Setting COLOR TEMPERATURE) One of preset color temperatures (degree of white color) is selected with menus. (Refer to Page 25 for setting menus.) 1. Reveal the professional-use picture quality setting menu. 2. Select “COLOR TEMPERATURES” by pressing {, } buttons. 3. Press ENTER button. 4. Select a desired color temperature by pressing {, } buttons.. Åú A favorable color temperature depends on each one’s preference. Generally, 9300 is preferably selected for viewing TV, 6500 is for viewing HDTV, and 5700 is for viewing movies. Åú When “USER1” or “USER2” is selected, each corresponding color temperature adjusted by user setting is selected. To cancel the menus: 5. Press MENU button. Adjusting degree of white color of projected images (User-adjustment of COLOR TEMPERATURES) When setting (storing) user’s preferable color temperatures, use “User-adjustment of color temperatures” in the professional-use picture quality setting menu. (Refer to Page 25 for setting menus.) To store the settings: 1. Reveal the professional-use picture quality setting menu. 2. Select “User-adjustment of color temperatures” by pressing {, } buttons. buttons. 3. Press ENTER button. Åú The menu for user-adjustment of color temperatures appears. 4. Select a basic color temperature by pressing {, } buttons. Åú Generally, select the most preferable color temperature from preset color temperatures. 5. Press ENTER button. Åú The selected color temperature is indicated, and the whiteness of projected images changes according to the color temperature. 6. Select the item to be changed by pressing {, } buttons. 7. Set the item by pressing ?, ? buttons. Åú The projected images also change accordingly. 8. Repeat the settings by repeating no. 6 and 7. 9. Select “User 1” or “User 2” by pressing {, } buttons buttons. 10. Press ENTER button. Åú The set color temperatures are stored in the memory. To cancel the menus: 11. Press MENU button. To bring one of the set color temperatures: Select “User 1” or “User 2” in “Setting color temperatures” of the professional-use picture quality setting menu. On color temperatures There is various degree of white color. One of the methods of representing degree of white color is color temperatures. White color of low color temperature is reddish white, and that of high color temperature is bluish white. In this projector, the color temperatures are set by varying each gain and bias of R (red), G (green), and B (blue) signal. To make the color temperature higher: Set the value of B-gain (or B-bias) larger, and the value of R-gain (or R-bias) smaller. To make the color temperature lower: Set the value of R-gain (or R-bias) larger, and the value of B-gain (or B-bias) smaller. One method of adjusting color temperatures is to make use of person’s skin color. Project a large still picture of human face on the screen, and adjust the color tone of the face so that it may look favorable (generally, it may look healthy). Åú Generally, the gains are used to adjust bright pictures, and the biases are used to adjust dark pictures. Åú Using the biases is effective in adjusting color of monotone pictures. (It is especially effective for adjusting dark to intermediate portions.) For example, when the green is relatively strong, decrease the value of R-bias, or increase the values of both B-bias and R-bias evenly. Also, when the projected images are bluish, decrease the value of B-bias, and when they are reddish, decrease the value of R-bias. In this way, favorable picture quality can be obtained. COLOR TEMPERATURE 6500 9300 5700 USER1 USER2 SET USER COLOR TEMP R GAINLOAD FROM SAVE TO G GAIN B GAIN R BIAS G BIAS B BIAS 57006500 9300 USER2 +256 +256 +256 +45 +45 +45 USER1 USER2 USER1 SETTING WITH MENUS
33 Adjusting picture images sent from computers This projector automatically sets an appropriate signal processing format according to the image signal sent from computers. However, depending on the type of the computer, the image signals may not be projected properly. On this occasion, a countermeasure should be taken as follows: 1. Reveal the setting menu. 2. Select “Setting signals” by pressing Å£, Å• buttons. 3. Press ENTER button. •The signal setting menu appears. 4. Select “Auto” by pressing Å£, Å• buttons. 5. Press ENTER button. • Automatic setting is made so that an appropriate setting may be obtained for the input signal. To cancel the menus: 6. Press MENU button. If the computer images can not be projected properly with the above operation, adjust the images using menus as follows: These settings can be stored in memory of the projector. How to adjust computer images using menus: If the following phenomena are observed, adjust as follows: Projected images are shifted to the left or right:Åc. Adjust “Horizontal position” in the signal setting menu. Every time ? button is pressed, the projected image is shifted to the left. Every time ? button is pressed, the projected image is shifted to the right. Projected images are shifted up or down:Åc. Adjust “Vertical position” in the signal setting menu. Every time ? button is pressed, the projected image is shifted downward. Every time ? button is pressed, the projected image is shifted upward. Projected images blink. Projected images are blurred:Åc. Adjust “Fine” in the signal setting menu. A wide streak pattern appears on the projected images:Åc. Adjust “Dividing ratio” in the signal setting menu. Åú Usually, do not change the settings in the signal setting menu. A simple method of adjusting the position of projected images Adjusting horizontal position: 1. Align the left edge of the projected image with the left side of the screen by adjusting “Horizontal position”. Then, align the right edge with the right side of the screen by adjusting “Dividing ratio”. 2. Repeat the above adjustments to align the horizontal position. Adjusting vertical position: 3. Align the upper edge of the projected image with the upper side of the screen by adjusting “Vertical position”. SETTING WITH MENUS
34 REPLACING THE LAMP / CLEANING THE PROJECTOR B Holder(b) The light-source lamp is stored in the projector to project picture images on screen. The light-source lamp is a consumable part. It may go off or its brightness may decrease during use. In these cases, replace the lamp to new one in good time. For the replacement, be sure to use the light-source lamp that is sold exclusively for TDP-MT500. Purchase the lamp from the delivery agent of the projector. Warning • Before replacing the light-source lamp, be sure to turn off the main power switch and unplug the power plug. Replacing the lamp without turning off the main power switch can cause electric shock. • When replacing the light-source lamp, be cautious not to drop the screws fixing the lamp into the inside of the projector. Do not put any metal pieces or easily flammable things in the projector. If the projector is operated containing foreign matters, electric shock or fire may be caused. If users can not take out the foreign matters inside, ask a repair front of Mitsubishi Electric Corporation to take them out. • Securely fix the light-source lamp. If it is not fixed properly, it will not come on and may cause fire. • Never shake the replaced light-source lamp or bring it over face. The lamp may be broken and its broken glass pieces may be scattered or enter human eyes causing injuries. • Do not replace the light-source lamp immediately after its use, because it is very hot and may cause burn. Turn off the power button to put off the lamp, and wait about 2 minutes until the cooling fan comes to a complete stop. Then, turn off the main power switch and unplug the power plug. After more than one hour has passed and the lamp has been thoroughly cooled down, replace the lamp. Caution In this projector, a LAMP indicator blinks after the light-source lamp has been used more than 1000 hours. When the lamp has been used more than 1300 hours, a warning appears on the screen every time the power is turned on. After more than 1500 hours of use, the power for the lamp is automatically turned off and the lamp can not be used any more. Then, replace the lamp to new one as soon as possible. • Do not remove the light-source lamp except when it is replaced. Otherwise, removing it may cause a failure. • As the light-source lamp, the high-pressure mercury lamp is used. The high-pressure mercury lamp may burst with a disruptive sound, if it is shocked or scratched, or if the lamp deteriorates while being used. Also, it may stop lighting when it comes to its life end. The lapse of time until each lamp bursts or stops lighting, if it occurs, depends on the characteristics or use condition of each lamp. Therefore, there is a possibility that it may burst by chance even in a short time after its start of use. • The possibility of burst of the high-pressure mercury lamp increases if it is used beyond its replacement period. When the indication of lamp replacement appears, immediately replace the lamp to new one if the lamp is lighting normally. • If the high-pressure mercury lamp bursts, the fragments of the glass valve may scatter in and out of the lamp box, or the gas filled in the valve may come out of the ventilation outlet. The gas filled in the high-pressure mercury lamp contains mercury vapor. Be extremely cautious not to inhale the gas or bring the gas into eyes or mouths. If the gas should be inhaled or brought into eyes or mouths, consult a doctor immediately. • If the high-pressure mercury lamp bursts, fragments of the glass valve are scattered inside of the projector. It is recommended to ask a service outlet of Mitsubishi Electric Corporation to replace the light-source lamp and check the interior of the projector. When users make the cleaning and the replacement of the lamp for them- selves, be sure to turn the main unit upside down and do it holding the lamp holder. Otherwise, the broken glass pieces of the lamp may cause injuries. How to replace the lamp: 1 Turn the unit upside down. 2 Undo the screw fixing the lamp cover (a) with a Phillips screwdriver and remove the lamp cover from the unit. 3 Undo the three screws fixing the lamp box with the Phillips screwdriver. 4 Pull up the holder.
35 REPLACING THE LAMP / CLEANING THE PROJECTOR Holder(b) B Exhaust vent Intake vent ENTER WIDE TELE LAMP TEMP MENU/EXIT POWER Û button Ýbutton POWER button 5 Holding the holder, pull out the light-source lamp from the unit. •Pull out the light-source lamp slowly. If the lamp is burst, the glass fragments may be scattered if the lamp is pulled out hurriedly. •Do not spray water or the like over the light-source lamp pulled out, or do not put it where children can access it or near anything easily flammable. It may cause burn or injury. 6 Holding the holder of a new lamp, insert the lamp to the bottom fitting the lamp to the shape of the hole in the unit. 7 Press the holder into the storage. •Make sure that the holder is securely locked. 8 Securely screw down the three fixing screws (b) with the Phillips screwdriver. 9 Insert the lamp cover into the unit, and se- curely screw down the screw (a) with the Phillips screwdriver to fix the lamp cover. •If the lamp cover is dislocated, the power can not be turned on. 10Turn on the power. 11Simultaneously press on { {{ { {, } }} } } buttons and POWER button ( ) on the operation panel of the unit for more than 3 seconds. •If the three buttons are not pressed simultaneously, the lamp-used- hours may not be reset. •If the lamp-used-hours have exceeded 1500 hours and the lamp has been replaced, it is not possible to turn on the new light-source lamp until the lamp-used-hours are reset. •Do not reset the lamp-used-hours if the lamp is not replaced. Cleaning dust in the intake vent If dust is accumulated in the intake vent, the temperature in the projec- tor goes up abnormally, and may damage the internal parts. Also, the light-source lamp may come off to protect the internal parts. Clean up the dust with a vacuum cleaner about once a year. Cleaning the projector Softly wipe off dirt on the projector with a soft cloth. •If the dirt is thick, wipe it off with a cloth soaked in a neutral detergent diluted with water, and then finish with a dry cloth. •If any pesticide is sprayed over the projector, or if the projector is wiped with benzine or thinner, or if rubber or vinyl products are brought into contact with the projector for a long period of time, the painting of the projector may change in quality or removed. Cleaning the lens Remove dust or dirt on the lens with a commercially available lens cleaning kit (blower, brush, and the like). •Because the surface of the lens is easily scratched, do not rub or hit the surface with anything hard.
36 POWERLAMP TEMP Countermeasure On in orange OffOff OffOff Off Off Off On in red On in redOn in green •Connect the power cable to the projector. •Plug the power plug into a power outlet. •Turn “On” the main power switch. •Fit the rear lamp cover. •If the projector itself is very hot, turn off the power switch, and after the temperature has come down, turn on the power switch again. •Replace the light-source lamp. (The lamp is at the end of its life.) •If the intake and/or exhaust vent is blocked with anything, remove it. •Prevent the wind from a heater from blowing into the exhaust vent of the projector, if it is happening. •Check if the air filter is foul with dust or not. àClean the filter, if it is foul. •Press POWER button after POWER indicator has stopped blinking in orange. •If the main power was turned “Off” while the fan was still turning, the lamp may not be able to come on next time for about one minute after the main power switch is turned “On” . •For about one minute after the light-source lamp has been put out, it is not possible to put the lamp on again. à á Blinking in orange TROUBLESHOOTING Before asking for repair of the projector, check the followings: If the problem still continues, stop using it and be sure to unplug the power plug. Then, contact the delivery agent of the projector. Picture images are not projected on screen. Phenomenon Power can not be turned on. Picture images are not projected on screen. Projected images sud- denly disappear.Check/Countermeasure •Check whether the indicators are on or off and how they are lighting. •In some cases it takes about one minute to put the lamp on. •On rare occasions, the lamp fails to come on. Then, turn on the lamp again after a few minutes. •If the projector finished operation without sufficient cooling, the cooling fan is turning and the follow- ing operation of the main power button may not work after the main power was turned on. (At this time POWER indicator blinks in orange.) After the fan has stopped turning, press the power button again to turn on the indicator in orange. •Check if the intake vent is not blocked with anything. •Check to be sure that the lamp cover is closed. (See Page 32 and 33.) •Check if the cable connecting the projector and external equipment is not broken. •When an extension cable is used, replace it with the attached cable for checking. If picture images are normally projected with the attached cable, employ an RGB signal amplifier together with the extension cable. •This phenomenon may occur if the intake vent and/or exhaust vent is blocked with any- thing. (At this time TEMP (temperature) indicator is lighting in red.) –After removing those things blocking the intake vent and/or exhaust vent, execute the followings: 1 Wait until the intake/exhaust fan stops turning. (Wait until TEMP (temperature) indica- tor comes off.) 2 Turn off the main power switch. 3 Wait about 10 minutes. 4 Turn on the main power switch. 5 Press POWER button. •LAMP indicator lighting in red indicates that the lamp must be replaced. Replace the light-source lamp to a new one. (See Page 32 and 33.)
37 TROUBLESHOOTING Projected images are irregular. 0UIFST Phenomenon Power can not be turned on. If the following phenomenon occurs after the lamp has been replaced, check the following first: Phenomenon Projected images are distorted. Projected images are dark. Projected images are blurred. White dots are seen in projected images. Black dots are seen in the projected images. A rainbow-color brume pattern is seen on projected images. Fine streak pattern is seen on projected images. Projected images are disturbed. Tint of projected images is irregular.Check/Countermeasure •Adjust the projector and the screen so that they may become perpendicular to each other. (See Page 11.) • Adjust BRIGHT and CONTRAST in the picture quality menu. (See Page 28.) •Replace the lamp to a new one. (See Page 32 and 33.) •Adjust the focus. (See Page 18 and 22.) •Check if the lens cap is not put on. •Clean the lens. •Adjust “FINE” and “DIVIDING RATIO” in the signal setting menu. (See Page 30.) •Adjust BRIGHT and CONTRAST in the picture quality menu. (See Page 28.) •Adjust the projector and the screen so that they may become perpendicular to each other. (See Page 11.) •This phenomenon is proper to DLP projector and is not a failure. (A very small number of pixels may be constantly lighting on or off, but this is not a failure. Pixels of more than 99.99% are effective ones.) •This pattern is a color breaking noise that occurs in DLP system in principle. This is not a failure. •This phenomenon occurs due to the interference with the screen surface, and is not a failure. Try to replace the screen or defocus the lens a little. •Securely plug the cable connecting the external equipment to the bottom. •Keep the projector away from equipment generating interfering radiowaves. •Check if the cable connecting the external equipment is broken. Phenomenon A hot air comes out of the exhaust vent. Menu setting is dis- abled. Abnormal sounds oc- cur.Check/Countermeasure •This air comes out after cooling the inside of the projector. It may feel hot, but is not a failure. •Affected by noises, the microcomputer in the projector may be malfunctioning. –>Turn off POWER once, and after 2 minutes turn it on again. •If POWER can not be turned off, turn off the main power switch and leave the projector as it is for more than 10 minutes. Then, turn on POWER again. •On rare occasions, a metallic clank occurs because the color wheel is rotating at a high speed. But, this is not a failure. Check/Countermeasure •Securely fit the rear lamp cover. (See Page 32 and 33.) •Reset the lamp-used-hours. (See Page 33.)
38 How to see the internal states from indicators There are three indicators that inform of the internal states of the projector. The internal states can be known by how the indicators are lighting. Check the followings, and if there is any problem, stop to use the projector and be sure to unplug the power plug. Then, contact a repair/customer front of Mitsubishi Electric Corporation. On in redOn in red On in green On in orange POWERLAMP TEMP STATE REMARK On in orangeBlinking in red Off Off Off On in red Replace the light-source lamp to a new one. Purchase a light-source lamp from the delivery agent of the projector. •Press POWER button after POWER indicator has ceased blinking. If this operation is repeated several times and the light-source lamp still does not come on, replace the lamp to a new one. Ask the delivery agent of the projector or a repair/customer front of Mitsubishi Electric Corporation about purchase of the lamp. The interior of the projector is very hot. •The intake vent and/or exhaust vent is blocked with something. •The projector is used at a very hot place such as outlet of heating air. •The air filter is foul. The protection circuit is working, or The lamp is not normal. (When power is turned off normally, this indication appears, and this is not a failure.) Countermeasure •Remove those things with which the vent is blocked. •Relocate the projector. •Clean the filter. Indicating replacement of the lamp (Used about 1000 hours* in total; Power is ON.) Indicating replacement of the lamp (Used about 1000 hours* in total; Power is OFF.) Indicating replacement of the lamp (Used about 1500 hours* in total) On in orange On in green Blinking in green Blinking in orange POWER LAMP TEMPSTATE REMARK Power ON (usually). Lamp standby state. Power can not be turned OFF. Lamp is being cleaned. Power can not be turned ON. Standby state. OffOff If the projector is not normal: When the projector is normal: LAMP indicator TEMP(temperature) indicator POWER indicator ENTER LAMP TEMP MENU/EXIT POWER INDICATORS Kensington Lock This projector has a Kensington Security Standard connector for use with a Kensington MicroSaver Security System. Refer to the information that came with the Kensington System for instructions on how to use it to secure the projector. Please contact to Kensington Technology Group as shown below. Kensington Technology Group 2855 Campus Drive San Mateo, CA 94403, U.S.A. Phone : (650)572-2700 Fax : (650)572-9675
39 44.5 19953.533.5181 168 25428 166 28 167 16 16280 9251 308 235 66 96 108 Screen Projector Screen Projector WHEN ASKING INSTALLATION WORK In the case of suspending the projector from ceiling and viewing the projected images from the front side: When suspending the projector from ceiling, use the separately sold dedicated metal bracket (see Page 38). Also, be sure to ask a special worker who received train- ing of the installation work to do the work. Consult the delivery agent of the projector about the details of the installation work. •If the projector is damaged by using any other suspension bracket than the dedicated one or due to any problem of the environment in which the suspension metal bracket is in- stalled, Mitsubishi Electric Corporation will not compensate the damage even if the product is still under warranty. Dimensional drawings (for references) •In the case of the suspension from ceiling, set the projection method in the setting menu to “Ceiling suspension”. Refer to Page 27 for the detail. •Ask the installation worker to provide a power breaker for the projector. When the projector is not used, be sure to turn off the main power for the projector with the breaker. •Where the projector is suspended from ceiling, the bright- ness of the projected images may be less brighter than where it is set on floor. However, this is not a failure. •Do not install the projector where its exhaust vent is directly exposed to the wind from an air conditioner or the like. Such installation may cause failures of the projector. •Do not install the projector near a fire alarm, because hot air is exhausted form the vent of the projector. In the case of installing the projector so that the picture images are projected onto a semitranspar- ent screen and viewed them from the rear side of the screen: When installing the projector, be sure to ask a special worker who received training of the installation work. Consult the delivery agent of the projector about the details of the installation work. •When viewing projected images from the rear side of the screen, set the projection method in the setting menu to “Rear”. Refer to Page 27 for the detail.
40 Item DLPTM projector Model no. TDP-MT500 Projection system DLP TM (Single-Board DMDTM) system Power AC 100 V, 50/60 Hz Power dissipation 300 W Resolution 1,024 x 576 Maximum number of display colors16,770,000 colors (full-color display) Light-source lamp 210-W lamp Projection screen Resolution: 640 x 400 (expanded) ~ 1024 x 768 (compressed) PC image input signalResolution: 640 x 400 (expanded) ~ 1024 x 768 (compressed) Video input signal NTSC /4.43 NTSC / PAL / PAL-N / PAL-M / PAL-60: automatically discriminated S-video input Luminance signal: Vp-p = 1.0 V, 75Ω (negative sync) Chrominance signals: Vp-p = 0.286 V, 75Ω (burst signal) Video input Vp-p = 1.0 V, 75Ω (negative sync) Analog RGB input RGB: Vp-p = 0.7 V, 75Ω (negative sync) (Mini D-SUB 15P) YC BCR: Vp-p = 1.0 V (Y) (negative sync), Vp-p = 0.7 V (CB, CR) HD/CS: TTL-level (negative or positive polarity) VD: TTL-level (negative or positive polarity) Computer digital DVI interface (TMDS single ring) input (DVI-D24P) Control terminal Serial (DIN 8-pin female terminal): RS-232C specification: one route Maximum outside dimensions30.8 cm (W) x 10.8 cm(H) x 25.1 cm(D): including lens projection and legs Weight 3.4 kg Power cable 2.9 m Operating temperatures+5˚C - +35˚C Operating humidity 10% - 90% (except for dew condensation) Terminals PIN No. NAME I/O 1––2––3 RXD OUT4––5–IN/OUT6–IN7 TXD–8–– SHELL GND– RS-232C terminal (DIN 8P) 12 6 8 SHELL 53 DVI terminal (DVI-D) PIN NO. STATUS PIN NO. STATUS 1 DATA 2–13–2 DATA 2+ 14 +5V Power3DATA 2 Shield15 GND4–16 Hot Plug Detect5–17 DATA 0–6 DDC Clock 18 DATA 0+7 DDC Data 19DATA 0 Shield8–20–9 DATA 1–21–10 DATA 1+ 22 Clock Shield11DATA 1 Shield23 Clock+ 12–24 Clock– 1724 16 9 8 1 DVI terminal (DVI-A) C3C4 C5 C2 C1 1724 9 8 1 16 PIN NO. STATUS C1 ANALOG REDC2 ANALOG GREENC3ANALOG BLUEC4 H SyncC5 GND6 DDC Clock7 DDC Data8 Analog Sync14 +5V Power15 GND 16 Hot Plug Detect SPECIFICATIONS (The specifications and outside appearance of the projector are sub- ject to change without prior notice. Please be notified in advance.)