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Troubleshooting - JVC AV-21R318 Instructions Manual

Colour television
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Troubleshooting

If a problem occurs when you are using the TV, check the below
troubleshooting guide before calling for repair.
Problem
No picture, no sound
• Deactivate the BLUE BACK function if it is
turned on.
• Choose the appropriate sound system. Refer
to "SOUND SYSTEM".
Snowy picture
• Check the aerial cable and TV connections.
Stripes appear on the
• Interference caused by devices such as an
picture
amplifier, personal computer, or a hair drier.
Move it away from your TV.
Double-pictures
• Interference occurs caused by signal reflecting
(ghosting) occur
from mountains or building. Try to adjust the
aerial's direction or use another antenna.
Poor picture
• Choose the appropriate colour system. Refer
to "COLOUR SYSTEM".
• Adjust the COLOUR or BRIGHT setting. Refer
to "PICTURE SETTING".
White and bright still
• Inevitable phenomenon due to the nature of
image look as if it was
the picture tube. This is not a malfunction.
coloured
Top of the image from
• Due to the condition of the video signal, the
software products or
image was not properly recorded. This is not a
video tape is distorted
malfunction.
Poor sound
• Adjust the sound frequency properly. Refer to
"SOUND SYSTEM".
Cannot operate the
• The batteries may be exhausted. Replace with
remote control
new batteries.
• Ensure that you are operating the remote
control at less than seven meters from the
front of your TV.
Cannot operate the
• Press TV/VIDEO button to return to TV mode
menus
and try operating the menus.
Cannot operate the
• Deactivate the CHILD LOCK function if it is
front control buttons
turned on.
Cause / Solution
Page
10
12
10
12
14
Problem
Colour patches appear
at the corner of the
screen
Picture is tilted
Image takes a short
4
period to be displayed
TV may emit crackling
sound
Feel a slight electric
shock when touching
9
the TV screen
AUTO SIGNAL DETECT
does not work
Suddenly, the TV input
changes to VIDEO-2
AUTO SIGNAL DETECT
6
does not work correctly
"PLEASE DISCONNECT
VIDEO-1 CABLE!"
appears on the screen.
Cause / Solution
• This maybe due to magnetized device such
as a speaker placed near to your TV. Move it
away from your TV. Alternatively, you can also
use the magnetic shielded speaker.
• This maybe due to the earth magnetism. Refer
to "PICTURE TILT" to correct the tilt.
• Image required time to stabilize before display.
This is not a malfunction.
• This is due to a sudden change in temperature
and it is not a malfunction. If the crackling
sound is too frequent, request your service
technician for inspection.
• This is due to the static electricity of the
picture tube and it will not harm the human
body. This is not a malfunction.
• Set the AUTO SIGNAL DETECT function to
ON.
• Turn the VCR or DVD Player off and on again.
• Check that the video cable connection on
VIDEO-2 is properly connected.
• Check whether the AUTO SIGNAL DETECT
function is on or off.
• AUTO SIGNAL DETECT function may work
when you operate the VCR or DVD player
even if you do not make it to playback.
• Check the video cable connection.
• Some VCR or DVD player may output the
video signal discontinuously. If this happens,
AUTO SIGNAL DETECT function cannot work
correctly.
• Please disconnect either S-VIDEO cable or
video input cable from video-1 input.
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