Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
06-05-2010, 06:17 PM   #1
New Member




Join Date: Jun 2010
Posts: 3
help! pentax K-M requires adjust date time all time

hi all,
I am a newbie for pentax camera.
I have just bought a pentax k-m 2 weeks ago,but I don't know why each time I take AA battery out and then reinsert camera to turn on it,it requires me to adjust date and time,I think this is because my cmos battery CR 2032 ( if have as on canon camera,it has a CR 2032 to store infs of date & time ) is out of date.kindly instruct me how to fix this problems with thanks.

06-05-2010, 10:37 PM   #2
Veteran Member
sterretje's Avatar

Join Date: Dec 2008
Location: Roodepoort, South Africa
Photos: Gallery | Albums
Posts: 3,534
First of all I think that the camera does not use a battery for that purpose. This info is either stored in flash memory or in memory that gets power from a supercapitor.

If it however does have a battery and it's a user replaceble part, read the manual as it should be mentioned in there.

I assume it's a second hand camera; if not, back to the dealer for warrantee swap/repair.
09-29-2010, 06:56 PM   #3
Junior Member




Join Date: Sep 2009
Location: Montreal
Posts: 37
I have the pentax k100d and I have the same problem.

mine is a second hand, I assume that's a common problem with pentax.
09-30-2010, 09:30 PM   #4
Pentaxian
Marc Sabatella's Avatar

Join Date: Sep 2006
Location: Denver, CO
Photos: Gallery
Posts: 10,686
It's a common problem with almost all sufficiently old consumer electronic products.

10-02-2010, 06:38 AM   #5
New Member




Join Date: Oct 2010
Photos: Albums
Posts: 3
每次换电池都要调整时间? 我也遇到过,应该是机身电容没电了。我的办法是使用一下内闪就解决了。
10-04-2012, 05:49 AM   #6
New Member




Join Date: Oct 2012
Posts: 1
QuoteOriginally posted by carl zeiss Quote
hi all,
I am a newbie for pentax camera.
I have just bought a pentax k-m 2 weeks ago,but I don't know why each time I take AA battery out and then reinsert camera to turn on it,it requires me to adjust date and time,I think this is because my cmos battery CR 2032 ( if have as on canon camera,it has a CR 2032 to store infs of date & time ) is out of date.kindly instruct me how to fix this problems with thanks.
Hi,

I have the same camera with the same problem, except that it is a second hand.

How did you fix your problem? Does it have an internal battery?

Regards,
Darin
10-04-2012, 07:22 AM   #7
Pentaxian
Paleo Pete's Avatar

Join Date: Jun 2010
Location: Texas
Photos: Gallery | Albums
Posts: 2,872
I'm not aware of any CMOS battery in a camera, although one might exist in some I suppose. Every desktop computer I've ever worked on has had one though, but it's a lot more accessible, and I've had to replace dozens. The time stamp is probably stored by means of a capacitor, which acts as a small battery of a sort. The capacitor stores an electrical charge until the circuit needs it. This is why if you open up a TV or a tube type guitar amp and touch the wrong thing it can kill you. They hold very high voltage for a long time, several months.

The capacitor in a camera holds a much lower charge, probably no more than 3 volts. (CR2032 battery is 1.5V I think) The problem is that the capacitor can only hold power for a certain time. If I take the batteries out of any of my cameras for 5 minutes, I have to reset the date. If I swap batteries in less than a minute, it stays put. I usually take less than 30 seconds.

I'm guessing here, but either you're taking too long to swap batteries or a capacitor is getting weak.

Last edited by Paleo Pete; 10-04-2012 at 07:30 AM.
10-04-2012, 06:03 PM   #8
Pentaxian
Not a Number's Avatar

Join Date: Mar 2012
Location: Venice, CA
Posts: 3,897
I think the *ist DSLR used a battery for the internal clock. I looked it up once but can't find the information on which models had them again. There is an additional battery cover on the bottom on the models that have them. Pentax replaced the battery with a build in accumulator I believe starting with the K series though it may have been some of the later *ist. According to Pentax support the accumulator will keep time for about 48 hours when charged for 12 hours with a fresh set of batteries.

10-05-2012, 12:07 AM   #9
Pentaxian
Sagitta's Avatar

Join Date: Feb 2011
Location: Maine
Photos: Gallery
Posts: 2,912
QuoteOriginally posted by Paleo Pete Quote
The capacitor stores an electrical charge until the circuit needs it. This is why if you open up a TV or a tube type guitar amp and touch the wrong thing it can kill you. They hold very high voltage for a long time, several months.
I about got knocked out of my chair just going in and mucking with the guts of my old Powershot - and that ran on a pair of AA's. Its not just TVs that can pack a wallop.
10-05-2012, 07:27 PM   #10
Pentaxian
Paleo Pete's Avatar

Join Date: Jun 2010
Location: Texas
Photos: Gallery | Albums
Posts: 2,872
I never would have expected that one...

Fortunately I found out about guitar amps before I went poking around inside mine, I Had to look up some info to find out what was wrong with it and one of the first sites I found had a stern warning at the top of the page. So I've always been very careful. Fortunately my Super Reverb is designed so that it it pretty easy to drain the capacitors. I guess I got lucky when tinkering with my Fender Champ, I replaced the power cord with a grounded one, soldered a bad connection back together, replaced all the tubes, poked around a lot looking for other bad connections (not hard, push the cardboard circuit board with a pencil, it'll make noise) and never got hit...long before I found out what the caps can do...
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
battery, camera, cr, date, dslr, k-m, pentax, photography, time
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
k-x, trouble entering date and time dcmsox2004 Pentax DSLR Discussion 4 12-30-2009 10:51 AM
Date/Time Stamping Pictures sparetyme Troubleshooting and Beginner Help 5 03-05-2009 11:34 AM
K20D Problem with setting date and time gubo Pentax DSLR Discussion 1 02-21-2009 09:32 AM
Date, Time, and Location? markpsf Pentax News and Rumors 2 01-23-2008 02:59 PM
A30 not holding date & time?? lmhcralph Pentax Compact Cameras 3 01-18-2008 08:25 PM



All times are GMT -7. The time now is 05:06 AM. | See also: NikonForums.com, part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top