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  1. #1

    Join Date
    Aug 2013
    Shooter
    35mm
    Posts
    2

    Mamiya M645J shutter squeak

    I have a bit of a puzzle here.


    Bought an M645J from an online auction. Everything seems pretty good--shutter fires accurately (as far as I can tell), installed a new battery that works fine, focus on the standard 80mm 2.8 moves smoothly, NM prism is clear.


    Only trouble I'm having is that the mirror lift makes a squeak/chirp about 50% of the time on all shutter speeds. Sound of the shutter itself is clean.


    The weirdest part: If I hold the camera upside down the sound goes away every shot.


    I think that the light seals are rotting out--I get some black dust here and there--and I wouldn't mind buying a kit and replacing them (along with the mirror bumper) but if this is unlikely to fix the problem, I think I'd rather return the camera and keep looking.


    What do you guys think?

  2. #2

    Join Date
    Aug 2013
    Shooter
    35mm
    Posts
    2
    A couple of updates:

    1. Sound is definitely the shutter--I can see it lag simultaneously with the squeak.
    2. Sync flash only fires when the shutter snaps cleanly. When I hear the squeak, the flash doesn't go off. (Also, the hot shoe doesn't seem to be working)

    I'm figuring this is electrical. Easy fix?

  3. #3

    Join Date
    Oct 2010
    Shooter
    Medium Format
    Posts
    164
    Hello;
    Might be a copy of the repair manual on the web, I bought one on EPAY and was worth every penny. Thinking a CLA would put you in the pink, Steven.

  4. #4

    Join Date
    Apr 2004
    Location
    Montgomery, Il/USA
    Shooter
    Multi Format
    Posts
    5,309
    I'd ship the thing back.
    It's not likely to be electrical if there's a physical lag.
    The 645's use a focal plane shutter if it's slowed down that much it's not worth the aggravation to you.

    If you do it for the challenge and want to gamble your $$ on it. Who's to say no?...............I'm a masochist too.
    Last edited by John Koehrer; 08-25-2013 at 08:10 PM. Click to view previous post history.
    Heavily sedated for your protection.



 

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