NikonGear'23

Gear Talk => What the Nerds Do => Topic started by: Bruno Schroder on October 17, 2017, 08:01:00

Title: Nerd help needed: broken pin on 500/4 AI-P
Post by: Bruno Schroder on October 17, 2017, 08:01:00

The contact block of my 500/4AI-P lost a pin.

If it possible to take a pin from another contact block and replace it?
If not possible, can I find a compatible block on another lens and cannibalize?

Thanks.

Title: Re: Nerd help needed: broken pin on 500/4 AI-P
Post by: Jakov Minić on October 17, 2017, 08:03:34

Erik, Bruno is in need.

Title: Re: Nerd help needed: broken pin on 500/4 AI-P
Post by: Erik Lund on October 17, 2017, 08:24:27

I can send you a new pin ;)  you can also use any pin from any Nikkor AF lens.


only one of the obscure old first Lens and TC's are different,,,

Title: Re: Nerd help needed: broken pin on 500/4 AI-P
Post by: Bjørn Rørslett on October 17, 2017, 09:27:40

The first generation(s) of the contact blocks lacked the metal guard that later versions possessed and thus are vulnerable to breaking off corners or losing a pin.

The best solution is replacing the original block with a new, metal one. I can get a replacement one if required. Just shoot me a PM.

Unfortunately, you wouldn't be the first finding yourself in this mess. I have supplied replacement blocks before.

Title: Re: Nerd help needed: broken pin on 500/4 AI-P
Post by: Bruno Schroder on October 18, 2017, 09:46:45

Thanks a lot, Bjørn. PM sent.

Would the chip also need replacing or is it easily transferable from the old block to the replacement one?

Title: Re: Nerd help needed: broken pin on 500/4 AI-P
Post by: Erik Lund on October 18, 2017, 10:10:05

No need to replace the CPU  :)

Title: Re: Nerd help needed: broken pin on 500/4 AI-P
Post by: Erik Lund on October 18, 2017, 10:16:19

BTW Bjørn refers to the rear backing plate, made out of metal, the front shell of the contact block is still made out of very tough plastic; They come as a set.

Title: Re: Nerd help needed: broken pin on 500/4 AI-P
Post by: Frank Fremerey on October 18, 2017, 11:21:27

Quote from: Bjørn Rørslett on October 17, 2017, 09:27:40

I have supplied replacement blocks before.

Yes, thank you for the contact block!

Title: Re: Nerd help needed: broken pin on 500/4 AI-P
Post by: Bjørn Rørslett on October 18, 2017, 14:41:35

The "old" CPU print is transferable to a new contact block. However, utmost care is called for in extracting the print from the existing block so as not to rip the print lane. You have to remove the fixing screws and take the bayonet off in order to get access to the internals of the block. It has been done before thus entirely feasible, but a steady hand and patience would be helpful during the process ....

Title: Re: Nerd help needed: broken pin on 500/4 AI-P
Post by: Erik Lund on October 18, 2017, 21:05:55

Ahhh Yes and JIS screwdrivers

Title: Re: Nerd help needed: broken pin on 500/4 AI-P
Post by: Bruno Schroder on October 18, 2017, 21:15:12

I have the JIS screwdrivers. Not so sure of the steady hand though, judging from my average quota of blurred pictures ;)

Title: Re: Nerd help needed: broken pin on 500/4 AI-P
Post by: FGAng on October 19, 2017, 14:32:52

Would be nice to have a pictorial record of this surgery for future reference.  TIA.

Title: Re: Nerd help needed: broken pin on 500/4 AI-P
Post by: Bjørn Rørslett on October 19, 2017, 14:47:59

The spare parts are in the mail as of today.

Recording the proceedings would be useful. I guess you would not be the last 500/4P user to request parts exchange.

Title: Re: Nerd help needed: broken pin on 500/4 AI-P
Post by: Bruno Schroder on October 19, 2017, 17:40:19

Sure, I'll record and post.