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So what goes wrong with AF-S sonic motors?
(05-08-2018, 03:24 PM)davidmanze Wrote: OK the first lens the AF-S 28-70mm F2.8 lens is now repaired and working fine!

Frankly they are fiddly to work on and certainly difficult to understand how to dismantle, someone had already been in there and mashed a crosspoint screw and went no further.
Like the AF-S 70-300mm VR that I repaired before I didn't find much wrong, checked out the distance scale which is poorly mounted....the motor squeaked when turned by hand. The aperture lever/mechanism is baffling as I couldn't understand why the lens stayed half open when unmounted.....+4 glass and a head torch showed the mechanism was two levers that had to be parted.......not in the least bit obvious.
I also raided three dud SLRs and stripped the for springs screws etc.

Re-assembling the AF-S 80-200mm F2.8 is a more serious job with a lot more stuff to I'll go in there in the next few days!

Oh onward and upward!

There's an African proverb that says: "If you don't know where to go, look from where you come"
When the repairs guy here refused to repair my 24-200 since it's not worth the effort, he advised me " when disassemble the lens record it with video, this way it's easier to go back"
You lose nothing by doing it, video with phones is quite easy now

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RE: So what goes wrong with AF-S sonic motors? - by toni-a - 05-08-2018, 05:23 PM

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