Panasonic TC 22LH1 - Manual (Page 46)

46
Troubleshooting
Before requesting service for this LCD TV, check the chart below for a possible cause of the problem you
are experiencing. Some simple checks or a minor adjustment on your part may eliminate the problem and
restore proper operation. If you are in doubt about some of the check points, or if the remedies indicated in
the chart do not solve the problem, consult your dealer for instructions.
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Symptom
Power supply does not go
on
Remote control cannot be
operated
Image shakes, or image is
unclear
There are spots on the
p i c t u r e , o r t h e s c r e e n
shakes
The image appears doubled
or tripled
A color pattern appears, or
colors disappear
T h e c h a n n e l n u m b e r
disappears from the screen
When the image is not stable,
the screen turns completely
white for a moment
The screen goes dark momentarily
when the channel is changed.
The TV makes a hissing
noise occasionally
The screen display shakes
with video input
A b l a c k b a n d a p p e a r s
momentarily when selecting
channels with video
Both edges of the screen, or
columns or window frames,
appear bent
The image from the connected
equipment does not appear
The main unit is hot to the
touch
Poor Video
(Example: Snow noise, no
picture, picture runs, etc.)
Poor Audio
Cause and remedy
• Is power supply plug unplugged from the outlet?
• If power will not go on with the remote control, is the power supply of the TV "Off"?
• Is battery exhausted, or is battery polarity wrong?
• Is the remote control receiver illuminated with strong light from a fluorescent lamp etc.?
• Are you using the special-purpose remote control for this equipment? (The unit
will not operate with another remote control.)
• Is there deterioration, breakage or disconnection of the antenna or antenna wire?
• Is the antenna wire connected correctly?
• Is the system affected (by radio wave interference or induced electromagnetic
waves) by external sources (automobiles or trains, high-voltage wires, neon,
motors, magnetized steel frame, or iron rain shutters, etc.)?
➠ Turn off the power supply, and try changing the equipment setup location. If
that has no effect, separate magnet-proofing will be required.
• Is the antenna direction shifted?
• Are reflected electromagnetic waves being received from mountains or buildings?
• Is the equipment being affected by another TV (electromagnetic interference)?
➠ Changing the TV setup location may lead to improvement.
• Has the RECALL button been pressed?
➠ Press the "RECALL button" again.
If the system is switched to external input and there is no external signal video,
the number will disappear.
• This occurs when the signal driving the liquid crystal is lost, and is not a
malfunction.
• The screen is darkened for a moment to conceal noise generated when changing
channels.
• If the screen and audio are not abnormal, this sound is caused by slight
expansion and contraction of the cabinet due to changes in room temperature.
It has no effect on performance.
• When input is switched to "video input", this may occur if there is no signal at
the video/audio input terminal.
• This is due to noise generated when changing channels.
• They may appear bent due to the received channel or some DVD software.
This is not a malfunction.
•Are plugs securely inserted into each terminal?
➠ Securely insert plugs all the way.
• The main unit radiates heat, so some parts of the console reach a high
temperature. 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 console with a tablecloth, etc., and do
not place on top of other equipment (like a video deck).
• Check HDMI cable is connected securely.
• Turn the power supply of the TV set and connected equipment ON/OFF.
• Check compatibility of connected signal. Change settings of connected
equipment to make signal compatible.
• Is the input source from the equipment that is EIA/CEA-861/861B compliant
consumer electric device?
• Set audio of connected equipment to L.PCM.
• Check setting of HDMI INPUT under AUDIO ADJUST.
• If the problem with the digital audio connection persists, change to an analog
audio connection.
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