[TechAssist] Re: Samsung DVD, Model DVD 611, Plays CD's But Not DVD's
- From: "Enrique Bonzon" <bigtime@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 18 Sep 2002 00:30:36 -0300
A defective pickup can read cd but no dvd playback; in most players the
dectection for disc type is made testing the pit size (holes that former the
track) so the disc must be spinning after primary focus detection to judge
disc type.You may note that cd pits are larger than dvd pits and focus &
tracking servo need less accuracy to read cd tracks; this concepts are over
1 laser pickup (Samsung dvd use this type of pickup),things with 2 laser are
different (1 laser for cd, another laser for dvd both with accurate
wavelentgh to optimun disc type reading).
Best regards
Henry
----- Original Message -----
From: <VideoVann@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, September 16, 2002 12:52 PM
Subject: [TechAssist] Samsung DVD, Model DVD 611, Plays CD's But Not DVD's
>
> Folks, would someone with superior knowledge please explain to an aging
> technician how a DVD player can recognize and play all CD's but not one
DVD.
> A general question, indeed, which might bend the rules of the list, but
will
> probably be beneficial to all Techs. Thanx, in advance, Clint Vanorsdell,
DBA
> Video Van, 90 Rockland St, Hanover, MA, 02339, 781-826-8983
>
>
>
>
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