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Mitsubishi UD8850U Manual

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EN-70
Troubleshooting (continued)
No image appears on the screen. (continued)
Problem Solution
The screen for
entering the password
appears.
• PASSWORDFUNCTIONintheFEATUREmenuhasbeensettoDISPLAYINPUT to
enable the password lock.
Enter the password or contact the person in charge of management of the
projector. (See page 58.)
“NO SIGNAL” is
displayed.
• Turnonthepoweroftheconnecteddevice,orcheckwhetherthereissomething
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
shaking.
Projected images are
displaced.
The edge of the
projected images is
not displayed.
• Checkthatthecableconnectedtotheexternaldeviceisn’tintermittent.
• Connectthecable’splugwiththeexternaldevice’sconnectorrmly.
• Projectanimagecontainingmanycharacterssuchasahelpmenuandpressthe
AUTO POSITION button.
• Somecomputersoutputout-of-specsignalsonrareoccasion.AdjusttheSIGNAL
menu. (See pages 39 and 40.)
• Checkwhetherthereisawindthatblowstheexhaustedairfromtheprojectortothe
direction of the projection lens.
Projected images are
distorted.
• Adjusttheprojectorandthescreensothattheyareperpendiculartoeachother.(See
page 14.)
Projected images are
dark.
• AdjustBRIGHTNESSandCONTRASTintheIMAGEmenu.(Seepage43.)
• Replacethelamp.(Seepage64.)
• Decreasethetemperaturewhentheambienttemperatureishighandthewarningis
displayed.
Projected images are
blurred.
• Adjustthefocus.(Seepage12.)
• 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48.)
• AdjustBRIGHTNESSandCONTRASTintheIMAGEmenu.(Seepage 43.)
• Adjusttheprojectorandthescreensothattheyareperpendiculartoeachother.(See
page 14.)
White dots are seen
on projected images.
Black dots are seen
on projected images.
• ThissymptomisnormalforaDLP™projectorandisnotamalfunction.(Averysmall
number of pixels may stay lit or out, but such symptom is not a malfunction. Pixels of
99.99%ormoreareeffective.)
Rainbow effect is seen
on projected images.
• ThisisduetocolorbreakingnoisethatoccursinaDLP™systemandisnota
malfunction.
Fine streaks are seen
on projected images.
• Thisisduetointerferencewiththescreensurfaceandisnotamalfunction.Replace
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
become wavy.
• Connecttheplugsofthecablestoexternaldevicessecurely.
• 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.
… 70 …


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