Nikon F4 - Body not 'seeing' / recognising CPU lens - *Sometimes*.. ! Help?

[Andreas Thaler]

@NeillRobinson

You should ensure that you do not expose the electronics to electrostatic discharge. So don't touch contacts directly, as much as possible.

But this is a more theoretical note as long as you don't use a grounding mat.

 

[Andreas Thaler]

This excellent tutorial shows, among other things, how to remove the bottom cover, along with helpful instructions.

Nikon F4 aperture lever repair

F4user submitted a new resource: (there was a url link here which no longer exists) - Nikon F4 aperture lever repair WARNING : Those instructions are for skilled persons with some knowledge of mechanics and electronics. Don't follow if you are unsure about your skills. F4 Aperture lever...

www.photrio.com

What I don't know, however, is whether there is a voltage converter in the F4 that increases the operating voltage. This will probably be the case, so I would generally be careful as with all electronic devices, even if they are not powered by mains voltage. Personal safety always comes first.

+++

All information provided without guarantee and use at your own risk

 

[NeillRobinson]

Oof, no - there's no chance in hell I would attempt this - I know the limit of my abilities far too well! I would end up making things worse, and not better.

I think I will have to just be content with a manual focus F4 for now, and look for a CLA at some point in the future from a professional...

 

[Andreas Thaler]

Oof, no - there's no chance in hell I would attempt this - I know the limit of my abilities far too well! I would end up making things worse, and not better.

I think I will have to just be content with a manual focus F4 for now, and look for a CLA at some point in the future from a professional...

When I disassemble my F4 to solve the aperture problem, I will also show the AF connector and what it looks like there in terms of electrically contacts.

Post in thread 'Nikon F4: Quick fix for gummed mechanics parts?'
https://www.photrio.com/forum/threa...or-gummed-mechanics-parts.203274/post-2766898

 

[NeillRobinson]

When I disassemble my F4 to solve the aperture problem, I will also show the AF connector and what it looks like there in terms of electrically contacts.

Post in thread 'Nikon F4: Quick fix for gummed mechanics parts?'
https://www.photrio.com/forum/threa...or-gummed-mechanics-parts.203274/post-2766898

Oh that would be great. Have you considered making a video? There aren't that many that I can find on YT of f4 disassembely..

 

[Andreas Thaler]

Oh that would be great. Have you considered making a video? There aren't that many that I can find on YT of f4 disassembely..

I am sorry, I don't make videos

I think it would be more informative to make a picture post with the most important stations and explanations. This reduces the viewing time for the reader and also reduces my effort.

By the way, we recently had a discussion/poll about this in the forum:

Repairs: Videos or text with photos?

As an enthusiast, I would like to encourage as many interested parties as possible to also become enthusiasts and repair their photographic equipment themselves reporting about their work. This would mean further repair reports that would benefit everyone. Of course, I have to be careful not...

www.photrio.com

 

[NeillRobinson]

Fair enough!