Support our Sponsors, they keep FADU free:   AG Photographic   Keyphoto   The Imaging Warehouse   Process Supplies   RH Designs   RK Photo   Second-hand Darkroom Supplies   Silverprint Ltd

Notices

Go Back   Film and Darkroom User > Equipment > Cameras - small format

  ***   Click here for the FADU 2015/2014 Yearbooks   ***

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 6th April 2021, 12:34 PM
Richard Lee's Avatar
Richard Lee Richard Lee is offline
Friend
 
Join Date: Aug 2009
Location: The English Lake District
Posts: 108
Default Nikon F4s Battery Corrosion

During the removal of a couple of corroded AA batteries from my Nikon, I've managed to dislodge one of the terminal springs from within the holder. Although having temporarily replaced the spring - held in solely by the pressure of a new battery; I still have no power to the camera.

I have a multimeter, but would welcome some guidance on how to test:

1. Continuity within the battery holder, and...
2. Whether the power is getting to the camera itself - can I rig an external power source for test purposes?

I've heard horror stories that battery corrosion can travel into the camera's circuitry, rendering the bloomin' thing useless.

Thank you for any help.

Richard
Attached Thumbnails
Click image for larger version

Name:	MB-21.jpg
Views:	26
Size:	232.8 KB
ID:	4141  

Last edited by Richard Lee; 6th April 2021 at 12:48 PM.
Reply With Quote
  #2  
Old 6th April 2021, 01:13 PM
Bob's Avatar
Bob Bob is offline
Administrator
 
Join Date: Aug 2008
Location: London(ish)
Posts: 2,413
Default

The corrosion will likely have removed the plating from the springs and/or other contacts and coated it with rust (which is non-conductive). If the springs can be removed then cleaning them with a wire brush and possibly light application of wire-wool might restore conductivity - at least temporarily (be mega-careful if they can't be removed and block any gaps with tape and tissue etc). Obviously, remove as much of the corrosive as you can. If the battery holder can be disassembled, do so to get at any that has got into the works.

If you can find a way to hold the batteries together outside the camera then a couple of flying leads with alligator clips attached to the camera contacts would help decide if it is just the spring contacts that are at fault or if something more serious has happened.

Your temporary fix with the broken spring may not be making good contact also.

If there are two batteries then they are probably wired in series - you can check that with your meter switched to the Continuity or Ohms range - with the batteries removed, there should be a dead short between the negative side of one battery contact (a spring) and the positive side of the other (a flat contact) - or of course, you may be able to see they are connected together if the link is visible. Plus, the way the batteries go in, reversed alongside each other, strongly suggests this is the case. If there are three batteries then it may get more complicated as they may all be connected in series or one may be on its own and used for something specific within the camera...

You could also check with your meter with the batteries inserted by testing the voltage on the contacts where they go into the battery holder body. If for example, placing the +ve lead of the multimeter in Volts mode on the battery tip and the -ve lead lower down on the spring, do you get 1.5(ish) volts - if not it suggests the spring is not conducting (but check the battery voltage on its own to check the battery itself is OK). Likewise, I assume there are contacts that take the power from the battery holder to the camera body - measuring the voltage at these contacts will tell you if power is making it to the camera body (but there may be more than one set of contacts which will complicate matters unless it is obvious which pair of contacts belongs to which set of batteries!).

Last edited by Bob; 6th April 2021 at 01:33 PM.
Reply With Quote
  #3  
Old 6th April 2021, 02:02 PM
Richard Lee's Avatar
Richard Lee Richard Lee is offline
Friend
 
Join Date: Aug 2009
Location: The English Lake District
Posts: 108
Default

Quote:
Originally Posted by Bob View Post
The corrosion will likely have removed the plating from the springs and/or other contacts and coated it with rust (which is non-conductive)... Likewise, I assume there are contacts that take the power from the battery holder to the camera body - measuring the voltage at these contacts will tell you if power is making it to the camera body (but there may be more than one set of contacts which will complicate matters unless it is obvious which pair of contacts belongs to which set of batteries!).
Bob, I'm sincerely grateful to you for taking the time. In truth, your excellent response will require much study and dissection. I will, of course, report back in due course.

Thanks again.
Richard
Reply With Quote
  #4  
Old 6th April 2021, 08:01 PM
Stocky Stocky is offline
Friend
 
Join Date: Oct 2010
Location: Melbourne, Australia
Posts: 193
Default

Do you still have the small battery holder that makes your F4S into a plain F4? I like using the grip, but if the grip's connectors are not repairable the camera could revert to the version without the grip.

Is there visible damage inside the camera where the grip's contacts meet up with the camera's contacts?

It's shocking how much damage can be caused by leaking batteries. I have found Duracell to be worse than Eveready in this regard.

Last edited by Stocky; 6th April 2021 at 08:04 PM. Reason: added
Reply With Quote
  #5  
Old 7th April 2021, 03:15 PM
photomi7ch's Avatar
photomi7ch photomi7ch is offline
Friend
 
Join Date: Jan 2009
Location: East Midlands
Posts: 2,424
Default

The spring that has come out will have a contact it needs to be connected to. it can not be just put in place to hold the battery.
__________________
Mitch

http://photomi7ch.blogspot.com/

If you eliminate the impossible whatever remains no matter how improbable must be the truth.
Reply With Quote
Reply
Support our Sponsors, they keep FADU free:   AG Photographic   Keyphoto   The Imaging Warehouse   Process Supplies   RH Designs   RK Photo   Second-hand Darkroom Supplies   Silverprint Ltd

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
battery by post big paul Auctions of Interest 10 9th May 2019 03:33 PM
battery step down big paul Help! 6 24th May 2018 11:44 AM
METZ CT 60 Battery Packs x 20 MarcAeonDELETED Sale or Wanted 0 20th October 2013 08:26 PM
Alkaline Battery Deal Neil Smith New products and offers 0 10th November 2011 08:01 AM
Nikon PB5 Bellows Unit + Nikon PS5 Slide Copying Adaptor kennethcooke Cameras - small format 0 13th August 2011 08:59 PM


All times are GMT. The time now is 09:07 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.