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Mareklew
Tinkerer
Username: Mareklew

Post Number: 118
Registered: 03-2010

Rating: N/A
Votes: 0

Posted on Thursday, July 01, 2010 - 12:16 pm:   

First step is to determine, whether the shutter cocks and releases, but doesn't open, or it is cocked and can't get released.

The shutter is an independent sub-assy, so you can move the cocking lever and the release lever by hand, there are no interlocks with the camera mechanics (double exposure prevention is implemented by inhibiting re-cocking the shutter, not within the shutter itself). Operate these levers and listen, if the shutter goes 'click'.

AS to the M-X lever: does it move freely now, and does the shutter make slight whirring sound when moving it? (it makes this slight sound only when moving the lever one way, not the other).

If there's no mechanical damage, most likely it's lubricant that migrated into the activator ring/shutter leaves and dried there, gumming things up.

Marek

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