Canon A-1 A1 problem with shutter release

Discussion in 'Canon' started by Lars Dietrich, Oct 5, 2004.

  1. I've got the following problem with my Canon A-1:
    Touching the shutter release button, the correct exposure is shown, but if I
    totally press the button,
    the indication disappeares and the shutter does not release. I have noticed
    the following things:
    (1) The problem occurs after approx 20 pictures, then it occurs once in a
    while, after approx 25 pictures no more pictures can be taken.
    (2) The problem does not depend on the mode of shutter release (with
    automatic release the "time" elapsed before nothing happens)
    (3) After removing the battery for more than 3 hours, the shutter release
    works for the next 20...25 pictures
    (4) The battery discharged really fast without using the camera (but this
    can have other reasons
    (5) The pictures I've taken are absolutely o.k. relating to exposure...
    Does anybody has an idea what the reason for this problem can be or what to

    Lars Dietrich
    Lars Dietrich, Oct 5, 2004
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  2. Lars Dietrich

    Alan Brennan Guest

    On Tue, 5 Oct 2004 16:29:16 +0200
    Lars Dietrich ( )
    First things first: how old is your battery? Have you tried replacing

    On an A1 the shutter is wound back by a complicated little electro-
    mechanical device and then held in place with a little electronic catch.
    It requires an electrical signal to release the catch. You are getting
    enough power to the camera to operate the shutter priming mechanism: the
    rewind lever won't turn if there is no power. But then when you press
    the shutter release there is no power getting to the release switch. The
    fact that your display disappears indicates a short somewhere. The fact
    that it is intermittent probably means it is caused by something loose:
    some dirt in the points of a solenoid, or something conductive lying on
    a chip or a solder joint or press joint that has come partially loose.
    You won't be able to fix any of this stuff, and you will need to take
    your camera in to a repair place.

    A1s are not all that expensive these days. You can get a pretty good one
    with a recent CLA for around $100. You'll have to weigh up the cost of
    repair against the cost of replacement.
    Alan Brennan, Oct 6, 2004
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  3. Lars Dietrich

    JME Guest

    Have you replaced the Battery?? Sounds like its on its last leg.
    JME, Oct 6, 2004
  4. Lars Dietrich

    brian Guest

    I would agree with changing the battery, make sure you get the nearest match
    to the battery type that was originally used for this camera, if the battery
    type isn't close to the original it may be that it is overheating and
    causing problems, as for the battery draining when the camera is not in use,
    perhaps you don't know it, but there is an on/off switch on the camera, if
    the camera is not swithed off, the battery drains in no time, on the top of
    the camera on the right there is a small lever marked with a white A, this
    means the camera is switched on, if you flick this to the right, its now
    marked with a red L, and the camera is switched off.

    Hope this is of some help.

    brian, Oct 8, 2004
  5. Sorry,
    perhaps there is a misunderstanding, but I know the A-1 very well and I work
    with this camera (and an AE-1 Program) for at least 15 years. Every "direct"
    problems caused by the battery can be excluded. I fear, that there is
    electronical problem with an capacitor, because the camera works
    successfully for a (short) time after removing the battery for more than 3
    I've changed the battery 3x also using the battery which I used in my AE-1
    Any other ideas?

    Best regards,
    Lars Dietrich
    Lars Dietrich, Oct 8, 2004
  6. Lars Dietrich

    JME Guest

    The capacitors will still hold a charge, likely not enought to release the
    shutter, but enough to allow the meter to work. Here is a link to some
    manuals for you to check out
    JME, Oct 9, 2004
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