Troubleshooting - Panasonic TH-47LFX6 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 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.
Parts of the unit become hot.
Power automatically turns off unexpectedly.
There is no picture displayed or sound output
sometimes.
The RS232C is uncontrollable
The LAN is uncontrollable
There is no picture displayed or sound output from
the DIGITAL LINK terminal.
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.
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 colour system format, or frequency is input, only
Normal Sound the input terminal indication is displayed.
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 uorescent light.
Check whether the remote control designed speci cally 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 fan may be heard: This is normal
and not indicative of malfunctioning.
Even when the temperature of parts of the front, top and rear panels has risen,
these temperature rises will not pose any problems in terms of performance or
quality.
Check the settings of "No signal power off", "PC Power management", "DVI-D
Power management" and "No activity power off". Any of them may be set to "On
(Enable)". (see page 33, 34)
When HDMI or DVI signals are input to the Display using a selector or
distributor, sound or images may not be output in the normal fashion
depending on the selector or distributor used.
The symptoms may be improved by turning the power off and on again, or by
replacing the selector or distributor.
Check whether the connection has been made properly. (see page 14)
When controlling the RS232C command on page 14 from the RS232C
terminal in the display, make sure that "Control I/F Select" is "RS-232C
(Serial)", and that it is "RS-232C(DIGITAL LlNK)" when controlling from the
RS232C terminal of the DIGITAL LINK device. (see page 43)
Check whether "LAN Setup" has been con gured properly. (see page 44)
(When controlling from the RS232C terminal of the DIGITAL LINK device)
Check whether the connection has been made properly. (see page 49)
Check whether "Control I/F Select" is "LAN" when controlling with the WEB
browser control or the command control on page 51. (see page 43)
Check whether "LAN Setup" has been con gured properly. (see page 44)
When connecting to a device of AMX, Crestron Electronics, Inc., or Extron, set
"AMX D.D.", "Crestron Connected™", or "Extron XTP" according to the device
to use. (see page 43)
See the "Signal quality" information of "DIGITAL LINK status" to check the LAN
cable status such as whether the LAN cable is disconnected or the cable is not
shielded. (see page 45)
Check whether the connection has been made properly between the video
(output) equipment and twisted pair cable transmitter and between the twisted
pair cable transmitter and this product. (see page 15)
Check whether "DIGITAL LINK mode" is set to "Auto" or "DIGITAL LINK"
instead of "Ethernet". (see page 43)
Checks
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