Troubleshooting - Panasonic TC-22LH1 Operating Instructions Manual

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I Troubleshooting
I
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.
Symptom
Cause
and remedy
pag_
Power supply does not go
• Is power supply plug unplugged from the outlet?
on
• If power will not go on with the remote control, is the power supply of the TV "Off"?
12
Remote control
cannot be
• Is battery exhausted,
or is battery polarity wrong?
7
operated
• 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.)
Image shakes, or image is
• Is there deterioration, breakage or disconnection of the antenna or antenna wire?
unclear
• Is the antenna wire connected correctly?
8, 9
There
are spots
on the
° Is the system affected (by radio wave interference or induced electromagnetic
picture,
or
the
screen
waves) by external sources (automobiles
or trains, high-voltage wires, neon,
shakes
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.
The image appears doubled
• Is the antenna direction shifted?
or tripled
° Are reflected electromagnetic waves being received from mountains or buildings?
A color pattern appears, or
° Is the equipment being affected by another TV (electromagnetic
interference)?
colors disappear
,,,,Changing the TV setup location may lead to improvement.
The
channel
number
° Has the RECALL button been pressed?
disappears from the screen
_ Press the "RECALL button" again.
If the system is switched to external input and there is no external signal video,
-
the number will disappear.
When the image is net stable,
• This occurs when the signal driving
the liquid crystal is lost, and is not a
the screen turns completely
malfunction.
15
white for a moment
The screengoesdark momentarily • The screen is darkened for a moment to conceal noise generated when changing
whenthe channel i s changed,
channels.
The TV makes
a hissing
• If the screen and audio are not abnormal,
this sound is caused by slight
noise occasionally
expansion and contraction of the cabinet due to changes in room temperature.
-
It has no effect on performance.
The screen display shakes
• When input is switched to "video input", this may occur if there is no signal at
with video input
the video/audio input terminal.
A black
band
appears
° This is due to noise generated when changing channels.
momentarily when selecting
10, 11
channels with video
Both edges of the screen, or
• They may appear bent due to the received channel or some DVD software.
columns or window frames,
This is not a malfunction.
appear bent
The image from the connected
•Are p_ugs securely inserted into each terminal?
equipment does not appear
--Securely insert plugs all the way.
10,11
The main unit is hot to the
I • The main unit radiates
heat, so some parts of the console
reach a high
touch
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).
Poor Video
• Check HDMI cable is connected securely.
H
(Example: Snow noise, no
• Turn the power supply of the TV set and connected equipment ON/OFF
picture, picture runs, etc.)
• Check compatibility
of connected
signal.
Change
settings
of connected
D
equipment to make signal compatible.
12
M
• Is the input source from the equipment
that is EIA/CEA-861/861B
compliant
consumer electric device?
I
Poor Audio
• Set audio of connected equipment to L.PCM.
• Check setting of HDMt INPUT under AUDIO ADJUST.
24
• If the problem with the digital audio connection persists, change to an analog
audio connection.
46

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