So some more broken stuff, a Canon QL17 GIII (again) … I bought this one because it was described as having a problem where the speed was stuck on bulb no matter what it is set on … hmm.
After I got it in my hands I realized that the description was missing a fact … the speed dial could only be turned half way. Well sounds like something is jamming the dial. Time to open it up.
The only difficult part to get deep here is the front lens cell. If you are lucky you can unscrew it with the help of a rubber tool … if you are not, then you need the special Canon tool,
Well, I found the problem … the speed selection dial post is no longer attached, and was jammed against the other dials.
The service manual shows the speed selection dial and the post that engages the speed cam on the shutter (that is lower in the body).
You can see that the top of it is bent … so someone forced the speed dial beyond its limit and popped the rivets holding the post on.
The speed selection dial is designed so that it cannot be over turned unless somebody did that while taking it apart … and I can easily see that this was disassembled before.
Ok, time to straighten it without deforming the rivets. I pressed it back in, then re-expand countersunk rivets with a punch.
Well, that wasn’t so hard … I was lucky that the problem did not involve fixing the shutter (as you cannot access it from just taking the front of the lens apart).