I have the same problem. I am not very good with fixing things, all the toys I tried to repair never worked after I touch them. Do you know how much $ canon or a repair shop usually ask for this repair?.
It hard for me to tell what Canon or another repair center would charge for such a repair. Here in The Netherlands there are only a few official repair centers that have there own prices. Usually they will replace the complete aperture unit, recalibrate and test it. Best is to contact a Canon repair center in your country. I would guess that this repair will be under $100.
I think I have the same issue, the images seem dark and I get the lens error. This looks slightly complicated, how long did the process take and how did you keep the dust at bay while it was open?
I've fixed my IPhone 3G before but this involves glass which puts me off a little:(
You can verify if you have the same issue to test if it's working without err99 at maximum aperture (as barry2718 wrote).
I recently did another 17-85 and when installing a complete new aperture unit it took me about one hour to get it all working again.
In fact, you don't need to remove the front lens element. I did this to remove some dust which is inevitable. Dust won't effect your images, fingerprints can. It indeed involves a litte more than fixing a mobile.
My EFS 17-85mm Is failed this weekend. After tested it at all zoomed I found everything worked at 28mm only. Alternately I could use the lens in manual with wide open aperture only. I've got the circuit board off at the back of the lens and can clearly see the broken ribbon cable to the EOS aperture. At 17mm the cable has a clear break line and at longer lengths the stress on the bend is acceptable but the damage is done.... This is a design fault and I'm disgusted. My lens is 3 years old.
Thanks a lot for the info. I'm currently stuck at dissambling the aperture unit( or power diaphragm as Canon likes to call it) and the IS unit. I can't remove the white plastic roller(9 of them). any advice??
These rollers are screwed in the so called 'power diaphragm' unit and the IS unit, three in each. For as long I can remember you only need to remove those six rollers.
After you removed the screws you can lift them out using a small screwdriver or a small pair of pliers. Although the slide show video shows how to remove also the front element, it's not necessary to remove it. If you have done it, make sure you put it back in the same way otherwise it might not focus well.
I didn't got them from Canon because I assume they only sell to business. On ebay there are a few shops where they sell canon eos parts, I bought a set of two cables from procamerarepair. While replacing the cable please make sure you do not overheat the contacts of the aperture unit. The tiny wires to the coils break very easily.
Auto focus can fail or start hunting with a broken aperture cable. If it's only the cable, the lens will operate without errors only at max aperture.
Yes it normally will, but with this lens warranty time was already passed. I replaced the aperture unit myself, in fact only the cable attached to it. If the lens had been in its warranty period I would not put my screwdriver in it. :-)
i wouldnt do this
1550592535 8 months ago
Thank you very much! You saved my ass (or couple of $) with this movie by encouraging me to open my lens and fixing it at home :). I owe you one!
homik126 1 year ago
I have the same problem. I am not very good with fixing things, all the toys I tried to repair never worked after I touch them. Do you know how much $ canon or a repair shop usually ask for this repair?.
telemart 1 year ago
It hard for me to tell what Canon or another repair center would charge for such a repair. Here in The Netherlands there are only a few official repair centers that have there own prices. Usually they will replace the complete aperture unit, recalibrate and test it. Best is to contact a Canon repair center in your country. I would guess that this repair will be under $100.
MGF37 1 year ago
I think I have the same issue, the images seem dark and I get the lens error. This looks slightly complicated, how long did the process take and how did you keep the dust at bay while it was open?
I've fixed my IPhone 3G before but this involves glass which puts me off a little:(
Thanks
Platform2Adventure 1 year ago
@Platform2Adventure
You can verify if you have the same issue to test if it's working without err99 at maximum aperture (as barry2718 wrote).
I recently did another 17-85 and when installing a complete new aperture unit it took me about one hour to get it all working again.
In fact, you don't need to remove the front lens element. I did this to remove some dust which is inevitable. Dust won't effect your images, fingerprints can. It indeed involves a litte more than fixing a mobile.
MGF37 1 year ago
My EFS 17-85mm Is failed this weekend. After tested it at all zoomed I found everything worked at 28mm only. Alternately I could use the lens in manual with wide open aperture only. I've got the circuit board off at the back of the lens and can clearly see the broken ribbon cable to the EOS aperture. At 17mm the cable has a clear break line and at longer lengths the stress on the bend is acceptable but the damage is done.... This is a design fault and I'm disgusted. My lens is 3 years old.
barry2718 1 year ago
Thanks a lot for the info. I'm currently stuck at dissambling the aperture unit( or power diaphragm as Canon likes to call it) and the IS unit. I can't remove the white plastic roller(9 of them). any advice??
carvedphoenix 1 year ago
@carvedphoenix
These rollers are screwed in the so called 'power diaphragm' unit and the IS unit, three in each. For as long I can remember you only need to remove those six rollers.
After you removed the screws you can lift them out using a small screwdriver or a small pair of pliers. Although the slide show video shows how to remove also the front element, it's not necessary to remove it. If you have done it, make sure you put it back in the same way otherwise it might not focus well.
MGF37 1 year ago
i have the same problem with the broken ribbon cable for the aperture unit. Where did you buy the ribbon cable? from Canon?
Anyway, did your lens have a problem with the autofocus before you fix it??
My 17-85mm cannot find focus and sometimes it showed error with comment asking to clean the contact parts.
carvedphoenix 1 year ago
@carvedphoenix
I didn't got them from Canon because I assume they only sell to business. On ebay there are a few shops where they sell canon eos parts, I bought a set of two cables from procamerarepair. While replacing the cable please make sure you do not overheat the contacts of the aperture unit. The tiny wires to the coils break very easily.
Auto focus can fail or start hunting with a broken aperture cable. If it's only the cable, the lens will operate without errors only at max aperture.
MGF37 1 year ago
I'm guessing this voids the warranty? lol
Tang0Fox1 1 year ago
Yes it normally will, but with this lens warranty time was already passed. I replaced the aperture unit myself, in fact only the cable attached to it. If the lens had been in its warranty period I would not put my screwdriver in it. :-)
MGF37 1 year ago