Mitsubishi Electronics HC4900 user manual Troubleshooting

Page 39

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.	J Enter the password or contact the person in charge of management of the
	projector. (See page 34.)

“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 33.)

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 30.)
dark.	• Replace the lamp. (See page 35.)

Projected images are	• Adjust the focus. (See pages 17 and 22.)
blurred.	• Clean the lens.
	• Press the W or X button on the remote control to eliminate ﬂicker.
	• Adjust TRACKING and FINE SYNC. in the SIGNAL menu. (See page 33.)
	• Adjust BRIGHTNESS and CONTRAST in the IMAGE menu. (See page 30.)
	• 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 dark 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.

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 28.)
images is incorrect.	• Check that the cable connected to the external device isn’t broken.

EN-39

Image 39

Contents HC4900 Risk of Electric Shock Do not Open When using the projector in EuropeContents Important safeguards Important safeguards Checking accessories Inserting the batteries into the remote controlPreparing your projector Terminal panel Preparing your projectorOverview Control areaBottom side Remote controlUsing the picture quality adjusting buttons Adjustment feetFront of projector Rear of projector Using the remote controlOperational range of the remote control Reception angleAdjusting the projection angle Setting up your projectorSetting up the screen Basic setupRear projection Setting up your projectorFront projection, ceiling mounting Trigger terminalWhen the aspect ratio of the screen is When the aspect ratio of the image isScreen size and projection distance Preparation Connecting the projector to video equipmentViewing video images Basic home theater system connectionViewing video images Connecting to a video player, etcConnecting to a DVD player or Hdtv decoder When a TV tuner or VCR is connectedConnection for video equipment having a DVI-D terminal Connection for video equipment having an Hdmi terminalPlugging in the power cord Projecting images To stop projecting ZOOM1 ZOOM2 Stretch Setting the aspect ratioHow to change the settings With the remote controlWith the Feature menu See page 25 for menu setting About DDC Connecting the projector to a computerPlugging the power cord Viewing computer imagesProjecting images Viewing computer imagesWhen connecting to a notebook computer Example of the setting procedure for external outputAuto Position button Display Input Menu operationImage menu How to set the menusAvailable settings in the menus Menu operationInstallation menu Feature menu User menu Signal menuInformation menu To store the settingsTo enable the stored image quality settings AV memoryTo sharpen or soften the projected image Sharpness Adjusting projected imagesTo adjust the brightness Contrast and Brightness To adjust the color Color and TintTo enable the stored color temperature Adjusting projected imagesTo adjust the tone of white Color Temp About color temperatureMID To adjust the ratio of change in brightness Gamma ModeTo enable the stored gamma mode HighLPF To adjust the vertical positionTo cancel the password function Advanced featuresPassword function To enable the password functionReplacing the lamp Interval of lamp replacementTo replace the lamp Reset of the lamp operation timeWhen removing the lamp from the ceiling-mounted projector Replacing the lampCleaning of the lens MaintenanceCleaning of the air-ﬁlter Cleaning of the projector and the ventilation slotsNo image appears on the screen Problem Solution TroubleshootingImages are not displayed correctly Problem Solution TroubleshootingOthers Problem Solution Abnormal condition IndicatorsStatus Condition Possible Solution Normal conditionSpeciﬁcations Dimension drawings unit mmSpeciﬁcations DVI-D Hdcp ConnectorsReplacement part Option/not included in the box Computer IN/COMPONENT Video HdmiMitsubishi Projector Contact Information