Panasonic TH-37PWD8WK Operating Instructions Manual

Also see for TH-37PWD8WK: Specifications Service manual

Panasonic TH-37PWD8WK Operating Instructions Manual Manual pdf 42 page image

42TroubleshootingBefore you call for service, determine the symptoms and make a few simple checks as shown below.Symptoms ChecksPicture SoundInterference Noisy SoundElectrical AppliancesCars / MotorcyclesFluorescent lightNormal Picture No SoundVolume(Check whether the mute function has been activated on the remote control.)No Picture No SoundNot plugged into AC outletNot switched onPicture and Brightness/Volume setting(Check by pressing the power switch or stand-by button on the remote control.)No Picture Normal SoundIf a signal with a non-applicable colour system format, or frequency is input, onlythe input terminal indication is displayed.No Colour Normal SoundColour controls set at minimum level(see page 22, 23)Colour system (see page 36)No remote control operations can be performed. Check whether the batteries have discharged completely and, if they have not,whether they were inserted properly.Check whether the remote control sensor is exposed to an outdoor light or astrong fluorescent light.Check whether the remote control designed specifically for use with the unit isbeing used. (The unit cannot be operated by any other remote control.)A cracking sound is sometimes heard from the unit. If there is nothing wrong with the picture or sound, this is the sound of the cabinetundergoing very slight contractions in response to changes in the room temperature.There are no adverse effects on the performance or other aspects.The top or bottom of the picture on the screen is cutoff when I use the zoom function.Adjust the position of the picture on the screen.Areas at the top and bottom of the screen wherethe image is missing appear when I use the zoomfunction.When using a video software program (such as a cinema size program) with ascreen wider than one in the 16:9 mode, blank areas separate from the imagesare formed at the top and bottom of the screen.I can hear sounds coming from inside the unit. When the power is turned on, a sound of the display panel being driven may beheard: 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 thetype of input signal. However, this is not a malfunction.Plasma Display panelSymptoms CheckThe screen darkens slightlywhen bright pictures with minimalmovements are shown.The screen will darken slightly when photos, still images of a computer or other pictures with minimalmovements are shown for an extended period. This is done to reduce after-image on the screen andthe shortening 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. Assuch, it sometimes takes a few moments for the picture to appear when the power has been turnedon, when the input has been switched or when the images for the main picture and sub picture onthe two screens are swapped.The edges of the imagesflicker.Due to the characteristics of the system used to drive the panel, the edges may appear to flicker inthe fast-moving parts of the images: This is normal and not indicative of malfunctioning.The brightness on both sides ofimages in the 4:3 mode changes.When viewing the side panels at the “High” or “Mid” setting, the brightness on both sides may changedepending on the kind of program shown: This is normal and not indicative of malfunctioning.Some 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 images displayedin 4:3 mode.Note:The permanent after-image on the Plasma Display resulting from fixed image use is not an operatingdefect and as such is not covered by the Warranty.This product is not designed to display fixed images for extended periods of time.[for TH-42PHD8WK/S,TH-50PHD8WK/S]Whirring sounds can be heardfrom the display unit.The display unit is fitted with a cooling fan to dissipate heat generated during normal use. The whirringsound is caused by rotation of the fan and is not a malfunction.