Re: Help with audio cassette recorder self-stopping
From: Mark D. Zacharias (mzacharias_at_yis.us)
Date: 07/21/04
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Date: Tue, 20 Jul 2004 19:59:26 -0500
Magnetic sensors for start and end?
If that's exactly how they put it to you, they may have "put it to you".
They only machines which ever used magnetic sensing for the beginning and
end -of-tape sensing were Beta vcr's.
More often a simple belt driving the counter / sensor ass'y.
Sometimes a mechanical problem, belt, idler, reel lock washer missing, etc.
Rarely something else - a bad lamp, etc. Once in a great while even a Hall
effect sensor ( yes, magnetically actualted. Haven't seen a bad one in at
least fifteen years.)
Mark Z.
-- Please reply only to Group. I regret this is necessary. Viruses and spam have rendered my regular e-mail address useless. "Pinchy" <geert@user1.be> wrote in message news:34b9802.0407200429.58b6c075@posting.google.com... > reverend_rogers@yahoo.com (b) wrote in message news:<1cfa6663.0407121443.7c55cacd@posting.google.com>... > > look around the area of the tape up spool for either a magnetic or > > optical motion detector. Often (at least with older units) there was a > > thin rubber drive belt connected to the take up spool and either the > > tape counter directly, or another sensor wheel which tells the > > electronics what the mechanics are doing . If the unit has been in a > > smoker's house chances are you simply need to clean the rotation > > sensor (sometimes a thin glass reed switch, sometimes a rotating disc > > with black and silver sections and a light source/sensor. maybe even > > under the spool? these are just guesses so try and get a service > > manual. > > > > Ben > > > > > > Robert Inder <robert@deadspam.com> wrote in message news:<f51brimr8ox.fsf@3lg.org>... > > > I have a Denon DR-M44HX --- a (fairly high-end) audio cassette deck > > > (remember them?) that has suddenly started working for only about a > > > second at a time. > > > (snip) > > > I once had a similar problem with another type of cassette deck. I > had it repaired by a service center and the only problem was that the > magnetic sensors indicating the start / end of a tape had to be > replaced.
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