MT-24EX mounting ring repair/cleaning

[jpgruber]

Hello,

Need some help/advice. I've had my MT-24EX since 2015 and have used it extensively in the field. I've noticed the gray spring-loaded release button on the top of the mounting ring getting a bit sticky in the last year or so. This morning it seems to have failed. Yesterday it worked fine. This morning when I attempted to attach the mounting ring to the end of my lens, the gray button did not 'snap' back out and the mounting ring spun easily around the lens. I tried using my rocket blower to clear dust around the button and added a bit of lubricant to no avail.

Canon seems to have discontinued service on the MT-24EX. Looking for some advice on how to get this repaired. I assume the internals of the mounting ring might just need a good cleaning. Has anyone ever opened one of these mounting rings? If so, is it easy to put it back together? Any repairpersons out there for this sort of thing?

Thanks much and Happy New Year!

[Stephen]

Hello, and welcome to the Canon Community!

I'm sorry to hear that you're having problems with your Speedlite Flash unit. Of course, you're welcome to attempt to repair your own equipment. However, we highly recommend against dismantling a flash unit unless you are trained by Canon. You're in for a nasty shock if you touch the wrong part! 

[jpgruber]

Hi Stephen,

Thanks for the warning. Just to be clear. I am talking about the ring that mounts the flash heads to the lens. See attached pics. Looks like there are 6 tiny screws that hold it together. If I did attempt to open it myself, it would be detached from the lens and from the flash heads. I assume this would eliminate any shock risk, correct?

[Stephen]

Honestly, I don't know, so I wanted to make sure I tossed out a blanket statement to be careful just in case! 

Sometimes, when I'm caught up in a project, I forget about little things like "safety" and end up learning things I never meant to learn! 🫠

[DougsGraphics]

If you remove those screws, the opposite side (front of the unit) will come off. Inside you will find two springs that maintain the tension. The locking mechanism is a rotating ring that is held in place with more screws. You can readily remove those circled screws and open the unit to inspect for debris or a broken spring without worry -- nothing should fall out or be a problem. If you find something broken, that may be a show stopper since I don't think replacements are available.

[jpgruber]

Thanks so much for replying and for the great info. Would you happen to know the size of those screws? I'll have to pick up a jeweler's screwdriver. Just need to know what size is needed.

[DougsGraphics]

#0 Phillips

[jpgruber]

Awesome, thanks again!