Canon EF camera on off switch problem

<p>Hi everyone <br>

Does anyone out there know about any problems with the Canon EF on off switch? Mine does not lock into the on mode. I need to push the lever up always and hold if I need to shoot/. If I let the tension off I can not shoot until I hold the lever up<br>

Thanks in advance</p>

<p>I have several EF bodies, and the On-Off switches on all of them remain in the "On" or unlocked position after the wind lever pops out to its stand-off position. Perhaps the linkage between the switch and the wind lever on your EF is sticking. Try pushing the wind lever in while holding the switch in the "On" position, or rocking the On-Off switch while holding the wind lever in the locked position. If exercising it doesn't work, you may have a broken part or adjustment problem. If you're willing to assume the risk, you could remove the top cover and attempt to repair the switch. Here's a link to a scan of the Canon EF service manual:<br>

<a href="http://www.baytan.org/prak/pdf/serv/CanonEF-serv-rep.pdf">http://www.baytan.org/prak/pdf/serv/CanonEF-serv-rep.pdf</a></p>

 

<p>Thank you Gordon</p>

<p>I will look into all your help as given in good time and I will post the outcome</p>

<p>I am retired so I will have ample time to explore into this camera soon</p>

<p>Kind regards<br>

Frank</p>

<p>I have recently acquired an EF and on a couple of occasions when turning it on the aperture needle didn't react. I had to push the on switch a little hire. I imagined it was some kind of loose contact. <br>

But the switch does stay locked up.</p>

<p>Hey i just got given a canon EF and i cant seem to get the light meter or shutter speed longer then 1sec to work I've got new batteries and have cleaned the contacted points any body have any suggestions??<br>

thanks<br>

Nathanael </p>

<p>Gordon<br>

I have found out the problem with the on/off switch<br>

It seems at one point the lever to turn it on and off was loose and the previous owner just tighten it up<br>

I opened the camera up by taking the top pate off then removing the on/off lever<br>

There is a well for a ball bearing to sit in there for a locking detent which was missing<br>

The back side of the lever is recessed for the ball bearing in the protruding arm of this lever<br>

I used a ball bearing from a Canon G-III used for the speed selector detent which works out great<br>

Now I know why the darn lever never stayed in the on mode<br>

Thanks again<br>

Frank</p>

<p>I ended up getting the correct size bearing for the lever was uneven when using the Canonet bearing<br>

Now it looks better and is working</p>

<p>Boy it only took 6 months to get to this problem and I though since being retired I would get to it much sooner !!<br>

It tell yous that more things are important in life than the small things that annoy you</p>

<p><img src="/canon-fd-camera-forum/<center><a%20href="http:/www.use.com/fdfe9ff080ba37887941?p=3"%20target="_blank"><img%20border="0"%20src="http:/media.use.com/images/s_2/fdfe9ff080ba37887941_3.jpg"%20width="420"></a><br>%20<a%20href="http:/www.use.com/fdfe9ff080ba37887941?p=3"%20target="_blank"><img%20src="http:/www.use.com/images/clicklarge3.gif"%20border="0"></a></center>" alt="" /></p><div></div>

<p>Just thought I'd add to this in case anyone else needs to remove the top cover to their EF. Here's a link to a site that shows how to do a variety of repairs to a variety of Canon cameras. This link is specific to top cover removal for the EF:</p>

<p>http://looscanons.com/tutorials/tutEF/index2.html</p>

<p> </p>

<p>Thanks for that. Just what I needed to try to make one good EF from 2 faulty ones. <br>

Word of warning, it doesn't tell you about a tiny ball bearing under the shutter speed cog. Luckily I found it in the carpet. <br>

My issue now is the shutter speed dial won't mesh with it's cog.</p>