Bedienungsanleitung Panasonic TH42PHD7WK (Seite 37 von 40) (Englisch)

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Symptoms

Picture Sound

Troubleshooting

Before you call for service, determine the symptoms and make a few simple checks as shown below.

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.

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 flicker.

The brightness on both sides of

images in the 4:3 mode changes.

Some parts of the screen do not

light up.

After-images appear

[for TH-42PHD7W, TH-50PHD7W]

Whirring sounds can be heard from

the display unit.

Plasma Display panel

Check

The screen will darken slightly when photos, still images of a computer or other 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 or when the images for the main picture and sub picture on the two screens are

swapped.

Due to the characteristics of the system used to drive the panel, the edges may appear to flicker in the fast-

moving parts of the images: This is normal and not indicative of malfunctioning.

When viewing the side panels at the “High” 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 fixed image use is not an operating defect

and as such is not covered by the Warranty.

This product is not designed to display fixed images for extended periods of time.

The display unit is fitted 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.

Interference Noisy Sound

Normal Picture No Sound

No Picture No Sound

No Picture Normal Sound

No Coloaur Normal Sound

No remote control operations can be performed.

A cracking sound is sometimes heard from the unit.

The top or bottom of the picture on the screen is cut off

when I use the zoom function.

Areas at the top and bottom of the screen where the image

is missing appear when I use the zoom function.

I can hear sounds coming from inside the unit.

Checks

Electrical Appliances

Cars / Motorcycles

Fluorescent light

Volume

(Check whether the mute function has been activated on the remote control.)

Not plugged into AC outlet

Not switched on

Picture and Brightness/Volume setting

(Check by pressing the power switch or stand-by button on the remote control.)

If a signal with a non-applicable colour system format, or frequency is input, only the

input terminal indication is displayed.

Colour controls set at minimum level

(see page 21, 22)

Colour system (see page 34)

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

fluorescent light.

Check whether the remote control designed specifically 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.

Adjust the position of the picture on the screen.

When using a video software program (such as a cinema size program) with a screen

wider than one in the 16:9 mode, blank areas separate from the images are formed at

the top and bottom of the screen.

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.

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