Severe Noise Or Snow - JVC HD-Z56RF7 Service Manual

Troubleshooting

Severe noise or snow

Is the TV connected correctly to the
aerial?
Change the direction of the aerial.
Is the aerial or its cable damaged?
Consult your retailer
Patterns, stripes or
noise
Is the aerial receiving interference
from high-voltage power lines or
wireless transmitters?
Consult your retailer
Are connected devices too close to
the TV?
Insert the minimum distance
between the aerial and the cause
of interference until no interference
Ghosting
(Doubling of images)
Are you receiving interference from
signals refl ected off mountains or
buildings?
Adjust the direction of your aerial,
or change to a good-quality
directional aerial
20
I can't turn it on!
Is the power cord connected to the AC
outlet correctly?
The remote
control doesn't
work!
Are the batteries fl at?
Are you more than 7 metres away from the TV?
Is the "MODE (TV, VCR/DVR, DVD, AUDIO)" set to "TV"?
When viewing teletext, the TV menu bar does not appear.
Depending on the stability of the signal, there may be a time
lag when changing channels.
Problem
Remote control stops
working
Front control buttons do
not work
Aspect ratio changes
unintentionally
Black or white dots
appear on the screen
PC screen alignment is
off
The screen is dim
Poor picture quality
Strange picture when
using an external device
Blue screen appears on
the screen
http://www.pureglare.com.au
Actions
Unplug the TV, and wait about 1 hour until the lamp
completely cooled. Then plug the TV in again. (Turning on the
TV soon may shorten the lamp life.)
Switch "Child Lock" to "Off."
Press " " to return to your settings.
Although the HD-ILA element is manufactured with high-
precision technology, please understand that some pixels
may be lost or permanently displayed.
Adjust the "PC Position."
Adjust the "Iris" brighter.
Unnatural colour >>> Adjust "Colour" and "Bright."
Check your "Colour System."
If "Auto" is selected, select the specific
colour system manually.
Noise >>> Set to the following functions.
Picture Mode : Standard
Super DigiPure : Max
Dull picture >>> Set to the following functions.
Picture Mode : Bright
Super DigiPure : Min
If the top of the image is distorted, check the video signal
quality itself.
If movement appears unnatural when receiving a signal from
a DVD player, etc. with 625p (progressive-scanning), change
the output setting of the external device to 625i (interlace-
scanning).
Switch "Blue Back" to "Off."
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