Mitsubishi Electronics WL639U user manual Troubleshooting, Images are not displayed correctly

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Troubleshooting (continued)

No image appears on the screen. (continued)

Problem	Solution
The screen for entering	•	PASSWORD FUNCTION in the FEATURE menu has been set to DISPLAY INPUT		to

the password appears.		enable the password lock.
		 Enter the password or contact the person in charge of management of the projec-
		tor. (See page 33.)

“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	• Project an image containing many characters such as a help menu and press the
displaced.		AUTO POSITION button.
	• Some computers output out-of-spec signals on rare occasion. Adjust the SIGNAL
		menu. (See pages 30 and 31.)
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 28.)
dark.	• Replace the lamp. (See page 38.)
Projected images are	• Adjust the focus. (See pages 15 and 19.)
blurred.	•	Clean the lens.
	• Press the  or  button on the remote control to eliminate flicker.
	• Adjust TRACKING and FINE SYNC. in the SIGNAL menu. (See page 31.)
	• Adjust BRIGHTNESS and CONTRAST in the IMAGE menu. (See page 28.)
	• 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.
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.
	• When the keystone adjustment is carried out, the image may not be displayed
		correctly depending on the type of input signal. This isn’t a product malfunction. In
		this case, readjust the keystone so that the amount of keystone correction is as small
		as possible.
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 26.)
images is incorrect.	• Check that the cable connected to the external device isn’t broken.
Different color tint.	• When comparing images projected by two projectors, tints in the displayed images
		may be different because of variation between their optical components. This is not a
		malfunction.
	• When comparing the image projected by this projector with those displayed on the
		television or PC monitor, tints in the displayed images may be different because of
		difference in the range of color reproducibility. This is not a malfunction.

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Contents WL639 When using the projector in Europe Compliance NoticeContents Important safeguards Important safeguards Checking accessories Inserting the batteries into the remote controlPreparing your projector Control area Preparating your projectorOverview Terminal boardRemote control Bottom sideAbout the laser beam Reception angle Using the remote controlOperational range of the remote control Front of projector Rear of projectorBasic setup Setting up your projectorSetting up the screen Adjusting the projection angleFront projection, ceiling mounting Setting up your projectorWall screen Rear projectionWhen the aspect ratio of the image is When the aspect ratio of the screen isWhen the aspect ratio of the image is 1610 Wxga Screen size and projection distanceConnecting the projector to a computer Viewing computer imagesPlugging the power cord Viewing computer imagesAbout DDC Projecting images To stop projecting When connecting to a notebook computerExample of the setting procedure for external output AV muteWhen a TV tuner or VCR is connected Connecting the projector to video equipmentConnecting to a video player, etc Viewing video imagesViewing video images Plugging in the power cordConnecting to video equipment having a DVI-D terminal Projector + DVD player or Hdtv decoderProjecting images Volume from the speaker Setting the aspect ratio How to change the settingsWhen projected images are distorted to a trapezoid Gamma Mode Menu operationHow to set the menus Available settings in the menusMenu operation Auto Power OFF Pink Black Board Lamp ModeAuto Power on On / OFF Mute Mode Black / ImageVideo Signal Password FunctionCinema Mode Auto Setup AutoSignal User menu FunctionLamp Time LOW ResolutionDescription InputTo adjust the color Color and Tint Adjusting projected imagesTo adjust the brightness Contrast and Brightness To cancel the menuAbout color temperature Adjusting projected imagesTo adjust the tone of white Color Temp Color EnhancerEN-30 To adjust the vertical position LPF Progressive filterAdvanced features Setting of the image displayed during startup or mutingTo enable the password function Advanced featuresPassword function To cancel the password functionExpand Picture in Picture PinPStill Operation Mouse remote controlProjector + computer with USB connector PageUp buttonSupervising and controlling by computer Major functionsConnection Normal condition IndicatorsPossible Solution Abnormal conditionInterval of lamp replacement Replacing the lampReplacing the lamp Reset of the lamp operation timeWhen removing the lamp from the ceiling-mounted projector To replace the lampCleaning of the projector and the ventilation slots MaintenanceCleaning of the air-filter Cleaning of the lensTroubleshooting No image appears on the screen Problem SolutionTroubleshooting Problem SolutionImages are not displayed correctly Images are not displayed correctly Problem Solution Others Problem SolutionKensington Lock Specifications Replacement part Option/Not included in the boxSpecifications XGA85Connectors Dimension Drawings unit mmCOMPUTER/COMPONENT Video IN-1/IN-2 DVI-D Hdcp Mitsubishi Projector Contact Information