All thumbs for an N90 task

Discussion in '35mm Cameras' started by Ken Rosenbaum, Jan 20, 2006.

  1. Can anyone help?
    I have just received a new Nikon back for my N90s. However, it lacks the
    film pressure plate that must be removed from the current back and installed
    on the new one.
    I, unfortunately, am all thumbs, but can sometimes manage simple chores.
    Changing backs is child's play, but how do I remove and install the film
    pressure plate? Or should I just get another plate?
    Can I do it myself or should I take it to a tech?
    What tools would I need?
    Is there an instruction sheet somewhere?
    Or would someone take pity and just tell me the proper steps to do the job
    that won't bend and scratch the pressure plate or destroy the back?
    Thanks in advance.
    Ken Rosenbaum, Jan 20, 2006
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  2. Ken Rosenbaum

    Jim Guest

    What? I own both types of Nikon backs for the N90, and neither requires
    that I replace the pressure plate..
    Jim, Jan 20, 2006
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  3. Ken Rosenbaum

    Jerry L Guest

    You may need to find a very good repair shop, or send the
    'pressure-plate-less' back _back_ to the place your bought it. It is
    not a good project for doing-it-yourself....unless you are into
    repairing clocks and such.
    = = =
    Jerry L, Jan 20, 2006
  4. Ken Rosenbaum

    Draco Guest

    Send back the back from where you bought it from,
    it is a defective item. All backs have the pressure
    plate already installed. Yours must have come
    out of someones junk box.


    Getting even isn't good enough.
    Draco, Jan 20, 2006
  5. Ken Rosenbaum

    Doug Robbins Guest

    Wrong! Replacement backs are usually sold w/o plates, which are a seperate
    replacement item. I replaced the backs on my two N90's and they both came
    from Nikon w/o plates.

    Doug Robbins, Jan 20, 2006
  6. Thanks, Doug. That is exactly the way they come from Nikon. Now, how do I
    remove and re-install the pressure plates?
    Ken Rosenbaum, Jan 21, 2006
  7. Ken Rosenbaum

    Doug Robbins Guest


    There are 4 "rivets" in the back under which the pressure plate springs fit
    simply by friction. Three of these slide out horizontially inward (bottom
    left, bottom right, top right) Slide these out first. The top left should
    then slide out downwards. Reverse the procedure when intalling the pressure
    plate on the new back. Take care to avoid bending the springs. Check for
    parallelism. It should be close if not actually perfect. The spring tension
    should compensate for any small errors when the back is closed.

    Hope this helps,

    Doug Robbins, Jan 21, 2006
  8. Are we talking about the same thing? I've added OPTIONAL backs to both
    my 8008 and N90 and they both came with pressure plates. Seriously.

    Perhaps only replacement, STANDARD backs come without plates? Swapping
    them is not something I'd want to do on an ongoing basis. it's not
    clear if the OP adding a data back or replacing a defective back.
    Scott Schuckert, Jan 21, 2006
  9. I think I understand the conundrum:

    o Backs with date functions [almost all option backs?] have to
    come with pressure plates because the plate incorporates the
    date printing LEDs/circuit board/etc. Any back meant to be
    swapped in and out would also come with a pressure plate, as
    who is going to fiddle with the pressure plate on an on-going

    o Replacement backs, as in backs for when the original gets
    bashed in taking a tumble on the rocks, don't come with
    plates as the plate in the old back should be perfectly
    good and what's the point in tossing $$ in the trash.
    Nicholas O. Lindan, Jan 21, 2006
  10. Thanks, Doug,
    That is exactly what I needed to know. Now it sounds like something I can
    For anyone else reading this thread, please know that N90 replacement backs
    from Nikon do NOT include a film pressure plate. Thousands of backs had to
    be replaced on the N90 and N90s because the rubber coating often came off
    the backs that came with the cameras. Pressure plates were still fine.
    As mentioned elsewhere, optional date stamp backs and multi-function backs
    DO include the film pressure plates because of the electronics involved.
    Ken Rosenbaum, Jan 21, 2006
  11. Ken Rosenbaum

    Doug Robbins Guest

    Typical of usenet. Some folks think it's necessary to make a reply when they
    haven't got a clue. If you can't give correct information, say nothing.
    Doug Robbins, Jan 24, 2006
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