Mamiya M645J shutter squeak

[benmrabet]

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?

 

[benmrabet]

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?

 

[snederhiser]

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.

 

[John Koehrer]

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.