My theory is that when someone is qualified to do this work, why do they
have to ask how to do it?
Funny, when the job is really done properly, there is the danger of the
shutter curtains unwinding inside the camera and coming out of position.
___________________________________
John Hermanson | CPS, Inc.
21 South Ln., Huntington NY 11743
www.zuiko.com | omtech1@xxxxxxxxxxx
Olympus OM Service since 1977
On 6/16/2013 12:18 PM, philippe.amard wrote:
> Vick
>
> I'm also on an Oly list - so is Nathan, and a few of us - maybe you'd
> find more expert Oly tips from there?
>
> Amitiés
> Philippe
>
> Le 16 juin 13 à 17:52, Vick Ko a écrit :
>
>> I bought an Olympus OM4 with a jammed film advance and shutter. The
>> metering and battery check still worked, but the camera shutter and
>> film are advanced and jammed, and the camera won't fire at B or 1/60
>> sec, the manual speeds.
>>
>> Searching the web, this seems to be a common flaw in the OM4.
>>
>> Here is how I fixed it.
>>
>> This photo, credit Rui Jorge Moreno, is a start:
>> https://lh4.googleusercontent.com/-6NZb8Rbu3v0/UE2zl5Q7u-I/AAAAAAAAAfk/-iWGqgtu4Xk/s720/2012-09-10%252000.49.24.jpg
>>
>> The pictured plate is the main sycnchronizer gear for the film
>> advance, shutter tension drum and the mirror actuation.
>>
>> First, the plate needs to be removed. Take off the three screws
>> shown.
>>
>> Then, clean out the gears around. Turn the shutter to B or 1/60
>> (manual setting).
>>
>> If you press the shutter release, you'll see that the thin bar to
>> the bottom of the photo moves. There is a pair of lever under the
>> silver gear that also moves. If you move the top and bottom, you'll
>> see that the film advance frees up. That is a great essential first
>> step.
>>
>> Also look at what the big thick bar is doing. It activates the
>> mirror movement, and it needs to move too. Take this opportunity to
>> study the mechanism and clean things.
>>
>> On my camera, the reverse lock (forked) lever was completely loose.
>> It is also under the silver gear and needs to move freely. You need
>> to remove the mirror mover bar, via its big cross-head screw. THIS
>> SCREW IS A LEFT HAND SCREW !!!!! Remove the bar and secure the
>> reverse lock (forked) lever.
>>
>> Then put the mirror lever back into place.
>>
>> Now, the camera gears need to be timed correctly. You will find
>> that the film advance finishes in 3 positions. One is the correct
>> one - and it ends with the rabbit ears of the silver gear in the
>> right place, per the photo.
>>
>> Under the synchronization plate (that you've removed), you'll find
>> the shutter tension drum. Advance it to the tensioned position - it
>> will click into place. Advance the film advance to the right
>> place. Now re-install the synchronization plate, with the gears in
>> the right place and the cutouts in the correct orientation.
>>
>> Now it should all work.
>>
>>
>>
>> _______________________________________________
>> Leica Users Group.
>> See http://leica-users.org/mailman/listinfo/lug for more information
>
> One sees clearly only with the heart. What is essential is invisible
> to the eye. Antoine de Saint Exupéry in Le Petit Prince.
> NO ARCHIVE
>
>
>
>
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