Troubleshooting - Panasonic TH-42PM50U Manual De Instrucciones

Troubleshooting

Before you call for service, determine the symptoms and make a few simple checks as shown below.
Symptoms
Picture
Interference
Normal
Picture
No Picture
No Picture
No Color
No remote control operations can be performed.
A cracking sound is sometimes heard from the unit.
I can hear sounds coming from inside the unit.
This Plasma Display uses special image processing. Hence a slight time lag may occur between image and audio, depending on the type
of input signal. However, this is not a malfunction.
Plasma Display panel
Symptoms
The screen darkens slightly
when bright pictures with minimal
movements are shown.
It takes a while for the picture
to appear.
The edges of the images
fl icker.
The brightness on both sides of
images in 4:3 mode changes.
Some parts of the screen do
not light up.
After-images appear
[for TH-50PM50U]
Whirring sounds can be heard
from the display unit.
22
Sound
Electrical Appliances
Cars / Motorcycles
Noisy Sound
Fluorescent light
Volume
(Check whether the mute function has been activated on the remote
No Sound
control.)
Not plugged into AC outlet
Not switched on
No Sound
Picture and Brightness/Volume setting
(Check by pressing the power button on the remote control.)
If a signal with a non-applicable color system format, or frequency is input,
only the input terminal indication is displayed.
Normal Sound
Color controls set at minimum level.
Normal Sound
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 a strong fl uorescent light.
Check whether the remote control designed specifi cally for use with the
unit is being used. (The unit cannot be operated by any other remote
control.)
If there is nothing wrong with the picture or sound, this is the sound of the
cabinet undergoing very slight contractions in response to changes in the
room temperature. There are no adverse effects on the performance or
other aspects.
When the power is turned on, a sound of the display panel being driven
may be heard: This is normal and not indicative of malfunctioning.
The screen will darken slightly when photos, still images of pictures with minimal movements
are shown for an extended period. This is done to reduce after-image on the screen and the
shortening of the screen's service life: It is normal and not indicative of malfunctioning.
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 been
turned on, when the input has been switched.
Due to the characteristics of the system used to drive the panel, the edges may appear to fl icker
in the fast-moving parts of the images: This is normal and not indicative of malfunctioning.
When viewing the side panels at the "Bright" or "Mid" setting, the brightness on both sides
may change depending on the kind of program shown: This is normal and not indicative of
malfunctioning.
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 luminous
spots. This is not a malfunction.
Do not allow a still picture to be displayed for an extended period, as this can cause a permanent
after-image to remain on the Plasma Display.
Examples of still pictures include logos, video games, computer images, teletext and images
displayed in 4:3 mode.
Note:
The permanent after-image on the Plasma Display resulting from fi xed image use is not an
operating defect and as such is not covered by the Warranty.
This product is not designed to display fi xed images for extended periods of time.
The display unit is fi tted with a cooling fan to dissipate heat generated during normal use. The
whirring sound is caused by rotation of the fan and is not a malfunction.
Checks
Checks
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