View original (French)

Introduction of cassette in Philips Turbo Drive VCR

James3 Posted messages 161 Registration date   Status Member Last intervention   -  
txiki Posted messages 6514 Registration date   Status Contributor Last intervention   -

Hello,

Regarding a Philips TURBO DRIVE VR 4479 VHS recorder

I just performed a cleaning of the various drive parts of the cassette and replaced the famous conical drive gear which tends to break.

For these operations I had taken photos of the various positions of the many levers and everything went back together without any problem, except that when making the first test the cassette presented by hand is not drawn in. It does not seem to be detected. The displays are OK

My question: what should be checked, because at the insertion of the cassette I do not see any other contact or sensor through which the cam disk could be started, other than an optical barrier. Could it be that this is the problem?

Thanks for your responses

3 answers

  1.
    txiki Posted messages 6514 Registration date   Status Contributor Last intervention   609
     

    Hi James3,
    "other than an optical barrier" : I don't think so (having repaired a few of them), that it's that.
    Look instead at a mechanical part that triggers about the length of a cassette in motion.
    Best regards!

    0
  2. James3 Posted messages 161 Registration date   Status Member Last intervention   10
     

    Thank you for this quick response

    When you talk about mid-course, is it during the horizontal run? Normally the cassette is presented by hand at a certain distance, then the automation kicks in and takes care of the horizontal end of travel and then the vertical. I don't see which lever you want to refer to. On the left, a plastic trigger, it wears away, and on the right a small metal lever (folded sheet) frees the passage for the horizontal run.

    I think one talks well about the Turbo Drive whose mechanism seems to have been adopted in various models of magneto.

    If you have an idea, although I’m an electromechanical engineer I’m stuck!!, especially without the "Philips Service" document .. Thanks (I could post photos)

    0
    1. txiki Posted messages 6514 Registration date   Status Contributor Last intervention   609
       

      Hi,

      No, I’m talking about the old VCRs, only possessing a mechanical system. Your mode seems much more advanced!
      Best regards!

      0
  3. James
     

    Ah OK, that’s why I mentioned "Turbo Drive" which uses a multitude of sensors and encoders that, once misadjusted, plunge us into a mess of parts for which we need to identify my positions and the synchronizations of the gears

    In any case thank you for taking an interest in my problem

    Best regards

    0
    1. txiki Posted messages 6514 Registration date   Status Contributor Last intervention   609
       

      You're welcome, sorry especially for not reading your question properly!

      0