Panasonic TH-42PH20U Operating Instructions Manual
Also see for TH-50PH20U: Operating instructionsManual de instrucciones
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50TroubleshootingBefore 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 Sound Volume(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 Sound If a signal with a non-applicable color system format, or frequency is input, only the inputterminal indication is displayed.No Color Normal Sound Color controls set at minimum level. (see page 25, 26)COLOR SYSTEM (see page 41)No remote control operations can be performed. Check whether the batteries have discharged completely and, if they have not, whether they wereinserted properly.Check whether the remote control sensor is exposed to an outdoor light or a strong uorescent light.Check whether the remote control designed specically for use with the unit is being used. (The unitcannot 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 cabinet undergoingvery slight contractions in response to changes in the room temperature. There are no adverseeffects 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 a screen widerthan one in the 16:9 mode, blank areas separate from the images are formed at the top andbottom 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 be heard: This isnormal and not indicative of malfunctioning.Parts of the unit become hot. Even when the temperature of parts of the front, top and rear panels has risen, these temperaturerises will not pose any problems in terms of performance or quality.Power automatically turns off unexpectedly. Check the settings of “PC POWER MANAGEMENT”, “DVI-D POWER MANAGEMENT” and“AUTO POWER OFF” in the SET UP menu. Any of them may be set to “ON”. (see page 34)This Plasma Display uses special image processing. Hence a slight time lag may occur between image and audio, depending on the type of inputsignal. However, this is not a malfunction.Plasma Display panelSymptoms CheckThe screen darkens slightly when bright pictures withminimal movements 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 image retention on the screenand the shortening of the screen’s service life: It is normal and not indicative of malfunctioning.It takes a while for the picture to appear. The unit digitally processes the various signals in order to reproduce esthetically pleasingimages. As such, it sometimes takes a few moments for the picture to appear when the powerhas been turned on, when the input has been switched.The edges of the images icker. Due to the characteristics of the system used to drive the panel, the edges may appear to ickerin the fast-moving parts of the images: This is normal and not indicative of malfunctioning.The brightness on both sides of images in 4:3 modechanges.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.Some parts of the screen do not 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.Image retention appearsDo not allow a still picture to be displayed for an extended period, as this can cause a permanentimage retention 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 image retention on the Plasma Display resulting from xed image use is notan operating defect and as such is not covered by the Warranty.This product is not designed to display xed images for extended periods of time.Whirring sounds can be heard from the display unit. The display unit is tted 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. |
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