Panasonic th-42pm50 操作ガイド
22
Troubleshooting
Before you call for service, determine the symptoms and make a few simple checks as shown below.
Symptoms
Checks
Page
Picture
Sound
Interference
Noisy Sound
Electrical Appliances
Cars / Motorcycles
Fluorescent light
Cars / Motorcycles
Fluorescent light
-
Normal
Picture
Picture
No Sound
Volume
(Check whether the mute function has been activated on the remote
control.)
(Check whether the mute function has been activated on the remote
control.)
12
No Picture
No Sound
Not plugged into AC outlet
Not switched on
Picture and Brightness/Volume setting
(Check by pressing the power button on the remote control.)
Not switched on
Picture and Brightness/Volume setting
(Check by pressing the power button on the remote control.)
13
13
13
12,13,17
No Picture
Normal Sound
If a signal with a non-applicable color system format, or frequency is input,
only the input terminal indication is displayed.
only the input terminal indication is displayed.
21
No Color
Normal Sound
Color controls set at minimum level.
17
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 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.)
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.)
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 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.
cabinet undergoing very slight contractions in response to changes in the
room temperature. There are no adverse effects on the performance or
other aspects.
-
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 is normal and not indicative of malfunctioning.
may 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 type
of input signal. However, this is not a malfunction.
of input signal. However, this is not a malfunction.
Plasma Display panel
Symptoms
Checks
Page
The screen darkens slightly
when bright pictures with minimal
movements are shown.
when bright pictures with minimal
movements are shown.
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.
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.
-
It takes a while for the picture
to appear.
to 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 been
turned on, when the input has been switched.
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.
-
The edges of the images
fl icker.
fl icker.
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.
in 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 mode changes.
images in 4:3 mode changes.
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.
may change depending on the kind of program shown: This is normal and not indicative of
malfunctioning.
20
Some parts of the screen do
not light up.
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 luminous
spots. This is not a malfunction.
however, sometimes some parts of the screen may be missing picture elements or have luminous
spots. This is not a malfunction.
-
After-images appear
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.
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.
20
[for TH-50PM50U]
Whirring sounds can be heard
from the display unit.
Whirring sounds can be heard
from the display unit.
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.
whirring sound is caused by rotation of the fan and is not a malfunction.
-