Troubleshooting - Panasonic Viera TH-32LHD7 Operating Instructions Manual

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
There may be red spots,
b l u e s p o t s a n d g r e e n
spots on the screen.
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.
The main unit is hot.
This LCD 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.
LCD Display panel
Symptoms
It takes a while for the picture
to appear.
Whirring sounds can be heard
from the display unit.
32
Sound
Electrical Appliances
Noisy Sound Cars / Motorcycles
Fluorescent light
Volume
No Sound
(Check whether the mute function has been activated on the remote control.)
Not plugged into AC outlet
Not switched on
No Sound
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 color system format, or frequency is input, only the
Normal Sound
input terminal indication is displayed.
Color controls set at minimum level.
Normal Sound (see page 21, 22)
COLOR SYSTEM (see page 29)
This is a characteristic of liquid crystal panels and is not a problem. The liquid
crystal panel is built with very high precision technology giving you fi ne picture
details.
Normal Sound
Occasionally, a few non-active pixels may appear on the screen as a fi xed point of
blue, green, or red.
Please note this does not affect the performance of your LCD.
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 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.
The main unit radiates heat and some of the parts may become hot. This is not a
problem for performance or quality.
Set up at a location with good ventilation.
Do not cover the ventilation holes of the Display with a tablecloth etc., and do not
place on top of other equipment.
The unit digitally processes the various signals in order to reproduce estheticically 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.
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
Check