Mitsubishi Electronics HC6800 user manual Troubleshooting continued, Problem, Solution

Page 41
Troubleshooting (continued)

Troubleshooting (continued)

No image appears on the screen. (continued)

Problem

Solution

 

 

The screen for

• PASSWORD FUNCTION in the FEATURE menu has been set to DISPLAY INPUT to

entering the password

enable the password lock.

appears.

Enter the password or contact the person in charge of management of the

 

projector. (See page 35.)

 

 

“NO SIGNAL” is

• Turn on the power of the connected device, or check whether there is something

displayed.

wrong with the connected device.

 

• Check whether the external device output signals. (Check this especially when the

 

external device is a notebook computer.)

 

• Check that the cable connected to the external device isn’t defective.

 

• Check that the projector is connected to the external device using the correct

 

terminals.

 

• Check that the connected device is correctly selected as the input source.

 

• When an extension cord is being used, replace it with the supplied cable and check

 

whether images are projected correctly. If images are projected correctly, use an RGB

 

signal amplifier along with the extension cord.

 

 

Images are not displayed correctly.

Problem

Solution

 

 

Projected images are

• Check that the cable connected to the external device isn’t intermittent.

shaking.

• Connect the cable’s plug with the external device’s connector firmly.

Projected images are

• Press the AUTO POSITION button.

displaced.

• Some computers output out-of-spec signals on rare occasion. Adjust the SIGNAL

 

menu. (See page 34.)

 

 

Projected images are

• Adjust the projector and the screen so that they are perpendicular to each other. (See

distorted.

page 10.)

 

 

Projected images are

• Adjust BRIGHTNESS and CONTRAST in the IMAGE menu. (See page 31.)

dark.

• Replace the lamp. (See page 36.)

 

 

Projected images are

• Adjust the focus. (See pages 18 and 23.)

blurred.

• Clean the lens.

 

• Press the t or u button on the remote control to eliminate flicker.

 

• Adjust TRACKING and FINE SYNC. in the SIGNAL menu. (See page 34.)

 

• Adjust BRIGHTNESS and CONTRAST in the IMAGE menu. (See page 31.)

 

• Adjust the projector and the screen so that they are perpendicular to each other. (See

 

page 10.)

 

 

Afterimages persist on

• This phenomenon is improved by keeping projecting an evenly bright image. (Such

the screen.

“image burn-in” phenomenon where afterimages persist on the screen may occur if a

 

stationary image is kept displayed on the screen for a long time.)

 

 

Red, blue, and

• This phenomenon is unique to LCD projector and isn’t a product malfunction.

green dots appear in

(A small number of pixels always stay on or off, which are not malfunctions. More than

projected images.

99.99% of the pixels are effective.)

Black dots appear in

 

projected images.

 

 

 

Fine streaks are seen

• This is due to interference with the screen surface and is not a malfunction. Replace

on projected images.

the screen or displace the focus a little.

 

• Vertical or horizontal streak noise may appear on the projected image, depending on

 

the type of the DVD player or game console you use. In such a case, you can reduce

 

such streak noise by enabling the LPF. (See page 29.)

 

 

Projected images

• Connect the plugs of the cables to external devices securely.

become wavy.

• Keep the projector away from devices that emit interfering radio waves.

 

 

Hue is not appropriate.

• Check that the cables connected to the external devices are not broken.

 

 

Tint in projected

• Check that COMPUTER INPUT in the SIGNAL menu is correctly set. (See page 29.)

images is incorrect.

• Check that the cable connected to the external device isn’t broken.

EN-41

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Contents HC6800 MODELHC6800 LCD PROJECTORREFER SERVICING TO QUALIFIED SERVICE PERSONNEL SHOCK, DO NOT REMOVE COVER OR BACK NO USER-SERVICEABLE PARTS INSIDETHE PROJECTOR IS IN THE POWER ON MODE CAUTION TO REDUCE THE RISK OF ELECTRICTrademark, Registered trademark ContentsEN-4 Important safeguardsDo not keep using the damaged projector Important safeguards continuedDo not look into the lens when it is operating Do not unplug the power cord during operationPreparing your projector Checking accessoriesInserting the batteries into the remote control Preparing your projector continued Indicator areaOverview Attaching the lens capUsing the picture quality adjusting buttons Remote controlBottom side Adjustment feetOperational range of the remote control Using the remote controlReception angle Front of projectorSetting up the screen Setting up your projectorWhen the aspect ratio of the screen is Screen size and projection distanceWhen the aspect ratio of the screen is 2.351 CinemaScope Setting up your projector continuedScreen size and projection distance continued When the aspect ratio of the image isWhen fine streaks are seen on projected images Adjusting the position of the projected imageWhen projected images are distorted to a trapezoid Correcting skewed or distorted imageRear projection Front projection, ceiling mountingTRIGGER terminal Viewing video images A. Connecting the projector to video equipmentBasic home theater system connection PreparationConnecting to a DVD player or HDTV decoder Connecting to a video player, etcViewing video images continued When a TV tuner or VCR is connectedConnection for video equipment having an HDMI terminal Connecting to video equipment having a HDMI terminalEN-16 EN-17 B. Plugging in the power cordEN-18 C. Projecting imagesEN-19 To stop projectingEN-20 Setting the aspect ratioWith the FEATURE menu See page 26 for menu setting How to change the settingsWith the remote control B. Plugging the power cord A. Connecting the projector to a computerViewing computer images About DDCViewing computer images continued Setting of the resolution When connecting to a notebook computerAUTO POSITION button Example of the setting procedure for external outputEN-25 Menu operationAvailable settings in the menus How to set the menusMenu operation continued 1. IMAGE menuEN-27 2. INSTALLATION menuEN-28 3. FEATURE menu5. USER menu 4. SIGNAL menuEN-29 To store the settings AV memoryTo enable the stored image quality settings 6. INFORMATION menuTo adjust the brightness CONTRAST and BRIGHTNESS Adjusting projected imagesTo adjust the color COLOR and TINT To sharpen or soften the projected image SHARPNESSTo adjust the tone of white COLOR TEMP Adjusting projected images continuedTo adjust the tone of white To customize the color temperature About color temperatureNoise reduction To adjust the ratio of change in brightness GAMMA MODETo enable the stored gamma mode TRNR temporal recursive noise reductionLPF Progressive filter How to adjust the image supplied from the computer using the menuSimple method to adjust the image position To adjust the horizontal positionPassword function Advanced featuresTo enable the password function To cancel the password functionReplacing the lamp Interval of lamp replacementReset of the lamp operation time Replacing the lamp continuedTo replace the lamp EN-38 When removing the lamp from the ceiling-mounted projectorCleaning of the lens Cleaning of the projector and the ventilation slotsEN-39 For the air-filter whiteProblem TroubleshootingSolution EN-40Images are not displayed correctly Troubleshooting continuedNo image appears on the screen. continued Others Images are not displayed correctly. continuedAbnormal condition IndicatorsNormal condition Dimension drawings unit mm SpecificationsEN-45 Specifications continuedSpecification of RGB signals in each computer mode of the projector EN-46 ConnectorsReplacement part option/not included in the box 1 Zusho Baba, Nagaokakyo-City, Kyoto Japan MITSUBISHI ELECTRIC CORPORATION
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