Mamiya M645J shutter squeak

Discussion in 'Medium Format Cameras and Accessories' started by benmrabet, Aug 22, 2013.

  1. benmrabet

    benmrabet Member

    Messages:
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    Joined:
    Aug 22, 2013
    Shooter:
    35mm
    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. benmrabet

    benmrabet Member

    Messages:
    2
    Joined:
    Aug 22, 2013
    Shooter:
    35mm
    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. snederhiser

    snederhiser Member

    Messages:
    164
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    Oct 14, 2010
    Shooter:
    Medium Format
    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. John Koehrer

    John Koehrer Subscriber

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    Apr 3, 2004
    Location:
    Montgomery,
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    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 a moderator: Aug 25, 2013