FAQ FAQ  Forum Search   Events   Register Register  Login Login

A99ii camera error - any ideas?

Page  <12
Author
Tanglefoot View Drop Down
Senior Member
Senior Member

Joined: 26 April 2010
Country: Iceland
Location: Hafnarfjörður
Status: Offline
Posts: 498
Post Options Post Options   Quote Tanglefoot Quote  Post ReplyReply Direct Link To This Post Posted: 25 August 2019 at 21:09
Originally posted by Snegren Snegren wrote:

It is a failure of the mechanism that operates the aperture control lever on the lens. Had it on my A99. Seems not an uncommon problem. 300 euros to fix it.


By jove! I think we have it!!!

Originally posted by amrep amrep wrote:

Originally posted by Tanglefoot Tanglefoot wrote:

- it does the shenanigans with the aperture then says the dreaded "camera error"
I am a bit puzzled by this. Do you mean the camera is *actively* doing something mechanically with the aperture when you mount the lens? Normally the body should just force the aperture to open when the lens is rotated in the mount because the lens aperture pin touches the notch on aperture actuator ring ("iris ring" is what Sony names it in the downloadable repair manuals). Then, by querying the lens ROM, the body gets some info about the lens maximum aperture and other parameters.


Bad description by me - I was thinking of the "shnick" sound when a lens (usually screw drive) clicks in. I didn't have my a99 to hand to compare to at the time so didn't spot the error in the 24-70 sounding the same as the old 28mm when mounted.... The "snick" sound comes from the af system, so the 24-70 shouldn't make that sound, but when it does & I can see movement in the aperture I have a brain dribble....

BUT... now my brain has regained some form of operation (and I have all cameras available to compare with...) it becomes obvious there is a problem with the aperture mechanism.

Originally posted by amrep amrep wrote:

However in many other cases the "Camera error" means that one of the servo controlled motors (in the body) is not working properly, usually the aperture motor. There is a very simple test to check out the most basic function of the aperture control. Turn off the camera and remove the lens, then move the aperture actuator ring notch with your finger tip until it aligns with the lens locking pin. Turn on the camera. The notch and ring should then immediately snap back to it's normal position. If this works you can probably rule out failure in the aperture control.


This realisation came after I tried this of course... 1st time - fine, 2nd time - hang on, did that feel a little different?, 3rd time - fine, 4th, 5th - zero resistance...!!! Houston - we found a problem!!!

Dyxum to the rescue! Thanks everso much everyone!!

$/€300 for a repairwould be ace and still make it a steal but the next problem is how to get it repaired... I live in Iceland these days - local camera repairers aren't exactly common & I'll end up paying more in customs than the camera cost if I sent it off...
Though I have found someone in the U.S. with parts for sale...
Flickr a99 | a900 | CZ 16-35 2.8 | CZ 24-70 2.8 | Min 28 2.0 | SAL 50 1.4 | Sig 70-200 2.8 HSM OS | Sammy 85 1.4 | Sig 105M | CZ 135 1.8
 



Back to Top
Bob J View Drop Down
Admin Group
Admin Group
Dyxum Administrator

Joined: 23 December 2005
Country: United Kingdom
Location: London
Status: Offline
Posts: 25707
Post Options Post Options   Quote Bob J Quote  Post ReplyReply Direct Link To This Post Posted: 26 August 2019 at 00:15
Does it make any difference if you have a clone or original battery in the camera? My a99 sometimes acts up and requires me to pop the battery, but I suspect it is dependent on what battery is in the camera..
Back to Top
amrep View Drop Down
Senior Member
Senior Member

Joined: 02 February 2015
Country: Norway
Status: Offline
Posts: 244
Post Options Post Options   Quote amrep Quote  Post ReplyReply Direct Link To This Post Posted: 26 August 2019 at 07:20
Originally posted by Tanglefoot Tanglefoot wrote:

1st time - fine, 2nd time - hang on, did that feel a little different?, 3rd time - fine, 4th, 5th - zero resistance...
That's a bit strange and might be important for further diagnosis. Of course you must remember to turn off the camera before you move the ring for that simple test to be valid.

If the ring moves back to normal position sometimes, the motor itself is probably ok. One or more missing gear teeth or other mechanical failure in the gear train may cause a somewhat intermittent error that aggravates under load. If the projection on the aperture ring that moves the lens aperture pin is just a little bit bent it may jam with the lens aperture pin. This can be easily corrected.
Back to Top
Miranda F View Drop Down
Senior Member
Senior Member

Joined: 11 January 2014
Country: United Kingdom
Location: Bristol
Status: Offline
Posts: 3458
Post Options Post Options   Quote Miranda F Quote  Post ReplyReply Direct Link To This Post Posted: 28 August 2019 at 21:49
It's worth checking that the aperture lever itself hasn't been knocked out of posiiton and isn't catching on either the body or the lens. That has been known to happen.
Miranda F & Sensorex, Sony A58, Nex-6, Dynax 4, 5, 60, 500si/600si/700si/800si, various Sony & Minolta lenses, several Tamrons, lots of MF primes and *far* too many old film cameras . . .
Back to Top
Tanglefoot View Drop Down
Senior Member
Senior Member

Joined: 26 April 2010
Country: Iceland
Location: Hafnarfjörður
Status: Offline
Posts: 498
Post Options Post Options   Quote Tanglefoot Quote  Post ReplyReply Direct Link To This Post Posted: 12 September 2019 at 04:19
so.... the plot has thickened!!!

there is a little spring that tensions the aperture mechanism which was out of place so I've put that back & the aperture mechanism does as it should do when you mount a lens - before it was shutting down slightly, which I assumed might have been the issue...
still getting the camera error message.

I've tried removing the screw drive pin - when I attach a screw drive lens you can hear the af motor whiring away, and when I attach a ssm lens it doesn't.
I am taking it from that that the af mechanism is working, and also the lens contacts are working as it can tell the difference between screw drive and ssm lenses.

So now I'm back to square one that I'm thoroughly stumped and don't know where to look next

Any ideas on how to test/check things further & where to go from here would be much appreciated!
Flickr a99 | a900 | CZ 16-35 2.8 | CZ 24-70 2.8 | Min 28 2.0 | SAL 50 1.4 | Sig 70-200 2.8 HSM OS | Sammy 85 1.4 | Sig 105M | CZ 135 1.8
Back to Top
Dyxum main page >  Forum Home > Equipment forums > Camera Talk > A-mount full frame Page  <12

Forum Jump Forum Permissions View Drop Down



This page was generated in 0.063 seconds.

Monitor calibration strip

Dyxum.com - Home of the alpha system photographer

In memory of Cameron Hill - brettania

Feel free to contact us if needed.