Connect with us

Adjusting Cassette Player Speed

Discussion in 'Electronic Repair' started by lukiedog, Nov 14, 2003.

Scroll to continue with content
  1. lukiedog

    lukiedog Guest

    My old Optonica RT-6207 is running a little slow (recent yard sale
    purchase). Without any special equipment, I would like to give a try
    adjusting it. I gather there is a screw or pot somewhere that might
    adjust motor voltage and subsequently speed. If this is in fact
    correct, where should I look for it? It is a 2 motor drive, does that
    affect what I may need to do? Don't have a 1K tape and am not
    interested in purchasing test equipment. Thanks.
  2. Sofie

    Sofie Guest

    BEFORE you adjust anything.... are you certain that the belts are not worn
    or slipping and that the lubrication of the mechanism is OK???
    There will either be a pot on the main board or a small adjustment hole in
    the back of the motor.
    Without a test tape or any test equipment ..... exactly how do you propose
    getting the speed absolutely correct?
  3. I once adjusted a player by having both a pre-recorded (store bought)
    tape and CD that were identical. I would play both at the same time, and
    tried to keep them in sync. There's no guarantee that the pre-recorded
    tape is exactly the right speed, but it's probably the closest with
    spending a lot of money on calibrated tapes and hardware.
  4. lukiedog

    lukiedog Guest

    I was planning on recording a number of plucks on a tuned guitar from
    an accurate recorder and playing back on the slow unit and adjusting
    it while monitoring my electronic guitar tuner. Or trail and error,
    if that failed.

    I opened the unit up and there are two motors made by sharp behind the
    cassette housing. They do have a hole in the rear of the round metal
    body which has a plastic film on them. The belts don't look too bad
    and look like they would be a bear to get to to replace anyway. And
    as far as lubrication, I wouldn't know where to start.

    If someone could make it sound easy, I would give it a shot.
    Otherwise, back to the pile. Too bad, it is a nice unit with a baked
    on black metal finish on the housing and the buttons have a very solid
    feel to them....
  5. jakdedert

    jakdedert Guest

    If you're not willing to replace the rubber, then I'd say it's 'back to the
    pile' for it. FWIW, the rubber is always the first thing to deteriorate on
    these otherwise functioning units. It's not worth going to any trouble at
    all with them, unless you're also going to get new rubber bands. It's just
    throwing good money (or effort) after bad.

  6. lukiedog

    lukiedog Guest

    There doesn't appear to be anything wrong with the rubber. Feels like
    it has tension. I have seen dried out bands before and these actually
    look pretty good compared.
  7. Sofie

    Sofie Guest

    You asked the question in your original posting, you have read the replies
    and repair suggestions from knowledgeable techs....... you can now decide
    what you want to do next, the ball is in your court.
    Best Regards,
    Daniel Sofie
    Electronics Supply & Repair

  8. Asimov

    Asimov Guest

    "lukiedog" bravely wrote to "All" (16 Nov 03 09:10:15)
    --- on the heady topic of "Re: Adjusting Cassette Player Speed"

    lu> From: (lukiedog)

    lu> There doesn't appear to be anything wrong with the rubber. Feels like
    lu> it has tension. I have seen dried out bands before and these actually
    lu> look pretty good compared.

    I've noticed rubber bands tend to soften and stretch rather then dry and
    tighten up. An old soft and stretched band will result in slipping.

    .... This message transmitted on 100% recycled photons.
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day