Panasonic TH-50VX100E, TH-65VX100E operating instructions Troubleshooting, Plasma Display panel

Troubleshooting

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

	Symptoms			Checks
	Picture		Sound
				Electrical Appliances
	Interference		Noisy Sound	Cars / Motorcycles
				Fluorescent light
				Volume
	Normal Picture		No Sound	(Check whether the mute function has been activated on the remote control.)
				Not plugged into AC outlet
	No Picture		No Sound	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
	No Picture		Normal Sound	the input terminal indication is displayed.
				Colour controls set at minimum level
	No Colour		Normal Sound	(see page 20-23)
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
				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.)
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.
The top or bottom of the picture on the screen is cut off				Adjust the position of the picture on the screen.
when I use the zoom function.
Areas at the top and bottom of the screen where the				When using a video software program (such as a cinema size program) with a
image is missing appear when I use the zoom function.				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.
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.

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	Check
The screen darkens slightly		The screen will darken slightly when photos, still images of a computer or other pictures with minimal
when bright pictures with		movements are shown for an extended period. This is done to reduce image retention on the screen and
minimal movements are shown.		the shortening of the screen’s service life: It is normal and not indicative of malfunctioning.
It takes a while for the picture to		The unit digitally processes the various signals in order to reproduce esthetically pleasing images. As
appear.		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 flicker.		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.
The brightness on both sides of		When viewing the side panels at the “High” or “Mid” setting, the brightness on both sides may change
images in the 4:3 mode changes.		depending on the kind of program shown: This is normal and not indicative of malfunctioning.
Some parts of the screen do not		The plasma display panel is manufactured using an extremely high level of precision technology,
light up.		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 image
		retention 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 image retention on the Plasma Display resulting from fixed image use is not an operating
Image retention appears		defect and as such is not covered by the Warranty.
		This product is not designed to display fixed images for extended periods of time.
Whirring sounds can be heard		The display unit is fitted with a cooling fan to dissipate heat generated during normal use. The whirring
from the display unit.		sound is caused by rotation of the fan and is not a malfunction.

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