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ATTN. Sam Goldwasser.

Discussion in 'Electronic Repair' started by prmodel3, Jul 15, 2007.

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  1. prmodel3

    prmodel3 Guest

    Hi Sam,
    I have some pics of the inside of the floating tracking and tangient
    mirrors found in the old Pioneer LD players if you'd like to add them
    to your page.
    The shaft the mirror-transducer for the PR7820 is kind of flimsy and
    it is prone to drifting. I've seen well over 2 dozen PR7820 players in
    the last 18 years and only 2 worked. One was o.k. the other had
    horrible video out put. All the others were DOA.
    The tracking and tangient mirrors for the LD-V1000 have a hollow brass
    shaft filled with rubber that sticks to the mirror at the other end.
    This design is more rigid and not as prone to drift with thermal
    cycles as the 7820 one was.
    If you can give me an e-mail I'd send these and more pics.
     
  2. I have one that works except for the rotted rubber sleeve on the spindle. :)
    The optics seemed perfect, very stable, slow and single frame worked
    perfectly (at least a few months ago last time I tried it).
    I wonder if those like the LD-660 had a similar design.
    Contact me via the Feedback form at
    http://www.repairfaq.org/sam/sammenu.htm
    and I'll give you an email address via return mail.

    Thanks.

    --- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
    Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
    +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
    | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html

    Important: Anything sent to the email address in the message header above is
    ignored unless my full name AND either lasers or electronics is included in the
    subject line. Or, you can contact me via the Feedback Form in the FAQs.
     
  3. prmodel3

    prmodel3 Guest

    The windings on the focus motor in an PR8210 have a highr resistance
    than the one in an LD-V1000.
     
  4. Bob Urz

    Bob Urz Guest

    You want some real unique laser stuff, i have a pair of Panasonic 12"
    Laser disk recorders from a military installation. They were 35K$ new or so.

    Bob
     
  5. Not quite 100 percent. The VP1000 slider has the HeNe laser power supply
    voltage multiplier attached to it and the VP1000 uses a different HeNe
    laser power supply than the others. But I agree the optics are identical
    by visual inspection at least.
    You mean Magnavox? Some of them I believe are totally different?
    That's interesting, wonder why?

    Yes, I know they are physicall interchangeable. But is the internal
    construction identical? I guess it is. But the LD-V1000 has a higher
    performance slider motor than the LD-660 even though the overall
    mechanism is basically the same.

    --- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
    Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
    +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
    | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html

    Important: Anything sent to the email address in the message header above is
    ignored unless my full name AND either lasers or electronics is included in the
    subject line. Or, you can contact me via the Feedback Form in the FAQs.
     
  6. HeHeHeHe.... Might be interested.

    But they probably weigh more than the early consumer LaserDisc players! :)

    --- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
    Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
    +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
    | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html

    Important: Anything sent to the email address in the message header above is
    ignored unless my full name AND either lasers or electronics is included in the
    subject line. Or, you can contact me via the Feedback Form in the FAQs.
     
  7. Bob Urz

    Bob Urz Guest

    Panasonic LQ 4000.

    Bob
     
  8. prmodel3

    prmodel3 Guest

    How hard would it be to copy a CAV disc so that all the frame numbers
    match the exact location as on the original disc?
    All laser discs have to be fourth generation copies starting from the
    film, then tape then glass master disc ,then to the finished copy
    thats commercially availible. I really don't think a 5th generation
    copy would have that much quality loss as far as the audio annd video
    are concerned.
    Anyone ever try this? Are there still places that do "one-off's"?
     
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