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Problem with 24-70 F4L USM

Started 8 months ago | Discussions
Krasko New Member • Posts: 1
Problem with 24-70 F4L USM

Hello!

I bought this lovely Canon 24-70 F4L IS lens second hand for my Canon 5D Mk4 with a problem. The body does not detect the lens, it shows F00 and when trying to take a picture it gives Error 01.

With isolated communication pins it works in manual focus but without controling diaphragm.

I have repaired other lenses before. Disassemble lens and i see were broken elements on the motherboard, most of which I replaced as well as the broken ribbon cable for the diaphragm.

Is it possible to find the circuit diagram of the board?
I searched all over the internet and couldn't find even a paid one!

Canon EOS 5D Mark IV
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BlueRay2 Forum Pro • Posts: 14,816
Re: Problem with 24-70 F4L USM

Krasko wrote:

Hello!

I bought this lovely Canon 24-70 F4L IS lens second hand for my Canon 5D Mk4 with a problem. The body does not detect the lens, it shows F00 and when trying to take a picture it gives Error 01.

With isolated communication pins it works in manual focus but without controling diaphragm.

I have repaired other lenses before. Disassemble lens and i see were broken elements on the motherboard, most of which I replaced as well as the broken ribbon cable for the diaphragm.

Is it possible to find the circuit diagram of the board?
I searched all over the internet and couldn't find even a paid one!

did you know of this issue when you purchased the lens? i hope you didn't pay too much money for it. to begin with, i'd clean the contact points on the camera and on the lens with alcohol. that usually what the problem is. hope you resolve the issue.

good luck.

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Unexamined world isn't worth living in. "Socrates"

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