View Single Post
  #6   Report Post  
Posted to sci.electronics.repair
[email protected] aaronep@pacbell.net is offline
external usenet poster
 
Posts: 6
Default toshiba dvd player mal functioning

On May 7, 1:25 am, "Arfa Daily" wrote:
"Mark D. Zacharias" wrote in . com...



"Arfa Daily" wrote in message
...


wrote in message
...
I have a Toshiba DVD player, model #SD-K760SU that is approx 1 year
old.
It is not playing properly in that scenes freeze on the screen, images
are distorted, and
Disks do not start from the beginning, but from other parts of the
disk.


Is this a situation where the lens needs cleaning, or might it be
another matter? If the lens does need cleaning, how can I access
the lens, OR, are there lens cleaning kits available?


Any suggestions on how to rectify the situation would be appreciated.


Aaron


For reasons quoted many times on here, DVD players do not generally
suffer from dirty lenses like CD players do. Exceptions to this are if
the player is located in a country or area that is very dry, or if the
player is located in a heavy smoking environment. Playability problems
are most often associated with a worn laser, although one year does seem
a little on the 'young' side. That said, if the player gets heavy use, it
is by no means unheard of for a laser of just one year to be showing
signs of wear, and of course, none of this precludes the possibility of
the laser being defective. Other causes of playability problems include
mechanical defects on the deck, iffy spindle motors and 'marginal' caps
on the power supply.


Do your freezes tend to occur late in the disc ? If so, that is usually a
good indicator of laser trouble, as it is much more difficult for it to
read layer two through layer one. A further test that you can run is to
try playing some full-length commercially pressed CDs. If these play
without problem, this pretty much verifies the mechanics, and is another
pointer for laser trouble.


By all means try cleaning the lens, but do not use a lens cleaner disc,
as this is unlikely to help, and can on some machines, cause physical
damage to the laser assembly. Access is usually available once the
optical block has been slid down its tracks towards the back of the deck,
which brings it out from under the disc clamp. The lens should be cleaned
carefully with a cotton bud (Q-Tip) moistened (not wet) with electronics
grade isopropyl alcohol. The lens suspension is fairly delicate, so don't
be 'brutal' with it, but by the same token, it is not so delicate that it
is easily damaged. Just use common sense. When the alcohol has
evaporated, polish the lens with a new clean and dry cotton bud.


The only symptom that you describe, which is a little 'odd' is that discs
seem to start from odd places rather than the beginning, although that
might just be being caused by the laser having trouble getting a good
error-free data stream off the disc.


Arfa


As usual, Geoff has more patience than I have. Bottom line: buy a new
player. A Pioneer would probably last longer.


Mark Z.


You're probably right Mark but hey, we gotta try, don't we ? d;~}

Arfa


note to all of the GOOD people who replied to my original post.
thank you for taking time to write. you have given me much
valuable information which I will use. best, Aaron