Archived posting to the Leica Users Group, 2014/04/18
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I wouldn't think that a few minutes of applied power would un-corrupt an EEPROM, though. Wouldn't it have to be re-flashed? ?howard On Apr 18, 2014, at 6:20 PM, Richard Man <richard at richardmanphoto.com> wrote: > EEPROM corruption? > > > On Fri, Apr 18, 2014 at 2:52 PM, Howard Ritter <hlritter at bex.net> wrote: > >> I have a Nikon N80 film SLR that sat unused after 2005, when I got my >> first digital SLR, until yesterday. I want to use it again for an idea I >> have about film astrophotography, so I put new batteries in it and turned >> it on. No result--nothing on the LDC data panel, no autofocus, no shutter, >> no LCD panel illuminator. Pushed the two-button reset. No result. >> Batteries >> out, batteries in, turned it on, turned it off, reset it, etc. etc. No >> result. After a few minutes I noticed that the LCD info display on top now >> showed a big -E-, meaning no film in the camera, as it does when the >> camera >> is off--progress! Turned it on and the LCD went blank. On & off again. No >> result, not even the E. Another minute or two and the E was back, and when >> I turned it on, it now showed camera data, as is normal. Push the shutter >> button and all goes blank. A few minutes later and the display is normal >> again, and now pushing the shutter button causes the lens to auto-focus >> and >> the shutter to fire. From there it's been working normally. >> >> So, as that the N80 is as much a computer-controlled electronic device as >> a mechanical one, it clearly has circuitry. Apparently some circuit >> component underwent a change in 9 years of not being powered up that >> disabled the device, then recovered function in a gradual or incremental >> manner once power had been applied. What is it? >> >> An internal intermediary battery that gets charged by the main batteries, >> purpose being to preserve the computer's data when the main batteries get >> discharged, and without a charge on which the camera won't work? And as it >> charges up, starts to run the camera incrementally? The manual makes no >> mention of an internal battery or of a period of recovery if the camera's >> been unused for years (maybe Nikon didn't even know this could happen). >> >> An electrolytic capacitor that loses its polarity in years of non-use, >> then re-forms over several minutes after new batteries are installed? >> >> Anyone know or have thoughts? >> >> --howard, n7exn >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information >> > > > > -- > // richard <http://www.richardmanphoto.com> > // http://facebook.com/richardmanphoto > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information