Panasonic TH-42PM50U Operating Instructions Manual

Also see for TH-42PM50U: Service manual Service manual

Panasonic TH-42PM50U Operating Instructions Manual Manual pdf 22 page image

22TroubleshootingBefore you call for service, determine the symptoms and make a few simple checks as shown below.Symptoms Checks PagePicture SoundInterference Noisy SoundElectrical AppliancesCars / MotorcyclesFluorescent light-NormalPicture No SoundVolume(Check whether the mute function has been activated on the remotecontrol.)12No Picture No SoundNot plugged into AC outletNot switched onPicture and Brightness/Volume setting(Check by pressing the power button on the remote control.)131312,13,17No Picture Normal SoundIf a signal with a non-applicable color system format, or frequency is input,only the input terminal indication is displayed.21No Color Normal SoundColor controls set at minimum level. 17No remote control operations can be performed. Check whether the batteries have discharged completely and, if they havenot, whether they were inserted properly.Check whether the remote control sensor is exposed to an outdoor lightor a strong fluorescent light.Check whether the remote control designed specifically for use with theunit is being used. (The unit cannot be operated by any other remotecontrol.)7--A cracking sound is sometimes heard from the unit. If there is nothing wrong with the picture or sound, this is the sound of thecabinet undergoing very slight contractions in response to changes in theroom temperature. There are no adverse effects on the performance orother aspects.-I can hear sounds coming from inside the unit. When the power is turned on, a sound of the display panel being drivenmay be heard: This is normal and not indicative of malfunctioning.-This Plasma Display uses special image processing. Hence a slight time lag may occur between image and audio, depending on the typeof input signal. However, this is not a malfunction.Plasma Display panelSymptoms Checks PageThe screen darkens slightlywhen bright pictures with minimalmovements are shown.The screen will darken slightly when photos, still images of pictures with minimal movementsare shown for an extended period. This is done to reduce after-image on the screen and theshortening of the screen’s service life: It is normal and not indicative of malfunctioning.-It takes a while for the pictureto appear.The unit digitally processes the various signals in order to reproduce esthetically pleasing images.As such, it sometimes takes a few moments for the picture to appear when the power has beenturned on, when the input has been switched.-The edges of the imagesflicker.Due to the characteristics of the system used to drive the panel, the edges may appear to flickerin the fast-moving parts of the images: This is normal and not indicative of malfunctioning.-The brightness on both sides ofimages in 4:3 mode changes.When viewing the side panels at the “Bright” or “Mid” setting, the brightness on both sidesmay change depending on the kind of program shown: This is normal and not indicative ofmalfunctioning.20Some parts of the screen donot light up.The plasma display panel is manufactured using an extremely high level of precision technology,however, sometimes some parts of the screen may be missing picture elements or have luminousspots. This is not a malfunction.-After-images appearDo not allow a still picture to be displayed for an extended period, as this can cause a permanentafter-image to remain on the Plasma Display.Examples of still pictures include logos, video games, computer images, teletext and imagesdisplayed in 4:3 mode.Note:The permanent after-image on the Plasma Display resulting from fixed image use is not anoperating defect and as such is not covered by the Warranty.This product is not designed to display fixed images for extended periods of time.20[for TH-50PM50U]Whirring sounds can be heardfrom the display unit.The display unit is fitted with a cooling fan to dissipate heat generated during normal use. Thewhirring sound is caused by rotation of the fan and is not a malfunction.-