Question about Zenith DVB312 DVD Player

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Dvd freezes during play

Intermittently, the picture in play mode will freeze and not continue on its own.

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Does this happen with all the DVD's
or just one particular movie ?

1) If the problem happens only on a single movie, than there is
a good chance that the disk is damaged.

In this case, you may be able to re-polish the disk to save it.
Many video-game stores have inexpensive gismos for doing
this, and it works just fine.

The reason it does work, is that the video data is stored on
the top of the disk underneath the label, where it is well
protected.

The laser shines from the bottom, through the plastic and
reflects off the label back down into a photo-detector.

If the bottom plastic is damaged or scratched, thus interfering
with the laser transmission, it can be simply re-polished.

2) If the problem happens to many or all DVD's, than the player
is either dirty, damaged, or suffers from a software/electronic
malfunction.

3) A dirty player can be cleaned, using a special
"CLEANING DVD", available from video stores.

4) Finally, if the player actually suffers from a software
or hardware malfunction, the most common cause is
overheating.

Digital electronics are very sensitive to heat, because
(especially in cheap home products) they are running
near the limits of technology.

Excess heat causes the digital signal pathways to slow
down in their ability to propagate ultra high frequency
pulses carrying binary information. These pulses then
get distorted or delayed beyond acceptable limits,
causing digital errors in signal processing.

If the number of errors is small, you may see white
sparklies in your picture. As the temperature and number
of errors increases, the internal computer gets confused
and crashes entirely

This is the cyber equivalent of HEAT-STROKE.

Make sure your DVD player has sufficient cooling and
airspace all around.

5) If this does not help, you may need to replace it.
Fixing DVD players is not practical nor economical.


Hope this helps and informs for the future,

Martin.

Posted on Apr 23, 2008

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