Date and Time

bluestringer · 11-20-2020, 05:43 AM

Is it normal to lose date and time when changing battery.

Paul the Sunman · 11-20-2020, 06:05 AM

No. The K-r has a back-up capacitor I believe. However, the K-r has been known to have this problem.

**othar** · 11-20-2020, 06:12 AM

Originally posted by bluestringer

Is it normal to lose date and time when changing battery.

There should be either a coin batterie of a back-up capacitor somewhere in the camera to prevent that from happening.
In your case I suspect that battery is dead, additionally to time and date I suspect you will also loose camera settings when changing the battery and they will go back to defaults.

**luftfluss** · 11-20-2020, 07:50 AM

My K-01 has this issue - not uncommon for the K-01 - and the only settings lost are the date & time. Other camera settings remain intact.

**manishved** · 11-20-2020, 08:20 AM

My previous 645z used to lose it all the time even when I didn’t replace the battery

bluestringer · 11-21-2020, 05:26 AM

Thanks all. Not a big problem, I'll just deal with it.

**photogem** · 05-15-2021, 11:27 PM

Originally posted by Paul the Sunman

No. The K-r has a back-up capacitor I believe. However, the K-r has been known to have this problem.

Not a capacitor but a Lithium battery.
See here:
Tutorial: Change Back-up Battery Pentax K-30, K-50, K-500 - PentaxForums.com
Any Pentax I know had this MS414 inside

**John in OZ** · 12-13-2021, 06:12 PM

Well just changed the date time battery. Took advice to print off images of where all the screws go and tape them to the page as removing them from the camera. Can find disassembly details easily on the web. Need a fine iron and steady hand. I only removed the connectors from the main board enough to get to the battery whilst it is still attached to the camera. Didn't need to unsolder any wires doing this. My first image after doing the task and sheets with the removed screws.

Maybe this is of help.

**photogem** · 12-13-2021, 11:44 PM - **1 Like**

Well done. I can't remember were the battery is located on its mainboard. With the K-x it is on the backside, so you have to unsolder wires to get the mainboard out.
The K-r and the K-m (K2000) have it like the K30/50 on directly accessable on the frontside of the mainboard.
The way this backup battery is fixed on the K-r is particular helpful because it is easy to unsolder.
Much more difficult on the K30/50 and almost impossible on the K-S1, K-S2 and K-70.

Attached photo/snapshop shows the K-r mainboard from the orig. service manual
Strange, your photo shows a diagonal placed battery, different to the one shown in the serv. man.

**John in OZ** · 12-14-2021, 07:34 PM

Originally posted by photogem

Attached photo/snapshop shows the K-r mainboard from the orig. service manual
Strange, your photo shows a diagonal placed battery, different to the one shown in the serv. man.

I used K-r notes which is similar enough to the K-x I have and repaired.

**photogem** · 12-14-2021, 10:30 PM

The K-x battery is on the front- or backside of the mainboard?

**John in OZ** · 12-16-2021, 12:49 AM

Originally posted by photogem

The K-x battery is on the front- or backside of the mainboard?

Battery is on the back. You can get to it without unsoldering any wire on the board though you need to undo many of the flexible flat cables, and remove the 4 screws securing the board..
You do need good fine soldering skills manipulating the board to expose the cell to a good degree. The camera with time date cell exposed has rear panel side down so the cell is behind the main board.
Even though it is much a beginners DSLR it is a treat to practice your skills and photographic assumptions with it. I find it helps with use of more expensive gear (Canon 5D 4 example) or shooting film. To me it has been worth while to repair the holding of date and time feature between battery changes or charging. Suffered it for at least a couple of years and it is a pain to reset all the time to me. Hope some of this helps.

**photogem** · 12-25-2021, 02:09 AM - **1 Like**

Originally posted by John in OZ

Battery is on the back. You can get to it without unsoldering any wire on the board though you need to undo many of the flexible flat cables, and remove the 4 screws securing the board..
You do need good fine soldering skills manipulating the board to expose the cell to a good degree. The camera with time date cell exposed has rear panel side down so the cell is behind the main board.

That's what was in my memory from another person and his K-x.
I prefer to take the mainboard out as shown here by member @Richard Bradford:
Kx - Date requiring reset - PentaxForums.com

This allows better access even for my tiny Weller WSP80N with pencil-tip.

11-20-2020, 05:43 AM	#1
bluestringer Veteran Member Join Date: Nov 2011 Location: Cotton fields of South Georgia Photos: Gallery Posts: 2,748	Date and Time Is it normal to lose date and time when changing battery.

12-13-2021, 11:44 PM - 1 Like	#9
photogem Site Supporter Join Date: Apr 2015 Posts: 3,520	Well done. I can't remember were the battery is located on its mainboard. With the K-x it is on the backside, so you have to unsolder wires to get the mainboard out. The K-r and the K-m (K2000) have it like the K30/50 on directly accessable on the frontside of the mainboard. The way this backup battery is fixed on the K-r is particular helpful because it is easy to unsolder. Much more difficult on the K30/50 and almost impossible on the K-S1, K-S2 and K-70. Attached photo/snapshop shows the K-r mainboard from the orig. service manual Strange, your photo shows a diagonal placed battery, different to the one shown in the serv. man. Attached Images

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11-20-2020, 06:05 AM	#2
Paul the Sunman Pentaxian Join Date: Aug 2011 Location: Melbourne Photos: Gallery Posts: 4,843	No. The K-r has a back-up capacitor I believe. However, the K-r has been known to have this problem.

11-20-2020, 06:12 AM	#3
othar Site Supporter Join Date: May 2014 Location: Linz Photos: Albums Posts: 3,098	Originally posted by bluestringer Is it normal to lose date and time when changing battery. There should be either a coin batterie of a back-up capacitor somewhere in the camera to prevent that from happening. In your case I suspect that battery is dead, additionally to time and date I suspect you will also loose camera settings when changing the battery and they will go back to defaults.

11-20-2020, 07:50 AM	#4
luftfluss Site Supporter Join Date: Jun 2011 Location: NJ Photos: Gallery \| Albums Posts: 11,619	My K-01 has this issue - not uncommon for the K-01 - and the only settings lost are the date & time. Other camera settings remain intact.

11-20-2020, 08:20 AM	#5
manishved Loyal Site Supporter Join Date: Mar 2008 Location: N. Calif Photos: Gallery \| Albums Posts: 3,651	My previous 645z used to lose it all the time even when I didn’t replace the battery

11-21-2020, 05:26 AM	#6
bluestringer Veteran Member Join Date: Nov 2011 Location: Cotton fields of South Georgia Photos: Gallery Posts: 2,748 Original Poster	Thanks all. Not a big problem, I'll just deal with it.

05-15-2021, 11:27 PM	#7
photogem Site Supporter Join Date: Apr 2015 Posts: 3,520	Originally posted by Paul the Sunman No. The K-r has a back-up capacitor I believe. However, the K-r has been known to have this problem. Not a capacitor but a Lithium battery. See here: Tutorial: Change Back-up Battery Pentax K-30, K-50, K-500 - PentaxForums.com Any Pentax I know had this MS414 inside

12-14-2021, 07:34 PM	#10
John in OZ Site Supporter Join Date: Sep 2020 Location: Ringwood, Victoria Photos: Gallery \| Albums Posts: 347	Originally posted by photogem Attached photo/snapshop shows the K-r mainboard from the orig. service manual Strange, your photo shows a diagonal placed battery, different to the one shown in the serv. man. I used K-r notes which is similar enough to the K-x I have and repaired.

12-14-2021, 10:30 PM	#11
photogem Site Supporter Join Date: Apr 2015 Posts: 3,520	The K-x battery is on the front- or backside of the mainboard?

12-16-2021, 12:49 AM	#12
John in OZ Site Supporter Join Date: Sep 2020 Location: Ringwood, Victoria Photos: Gallery \| Albums Posts: 347	Originally posted by photogem The K-x battery is on the front- or backside of the mainboard? Battery is on the back. You can get to it without unsoldering any wire on the board though you need to undo many of the flexible flat cables, and remove the 4 screws securing the board.. You do need good fine soldering skills manipulating the board to expose the cell to a good degree. The camera with time date cell exposed has rear panel side down so the cell is behind the main board. Even though it is much a beginners DSLR it is a treat to practice your skills and photographic assumptions with it. I find it helps with use of more expensive gear (Canon 5D 4 example) or shooting film. To me it has been worth while to repair the holding of date and time feature between battery changes or charging. Suffered it for at least a couple of years and it is a pain to reset all the time to me. Hope some of this helps.

12-25-2021, 02:09 AM - 1 Like	#13
photogem Site Supporter Join Date: Apr 2015 Posts: 3,520	Originally posted by John in OZ Battery is on the back. You can get to it without unsoldering any wire on the board though you need to undo many of the flexible flat cables, and remove the 4 screws securing the board.. You do need good fine soldering skills manipulating the board to expose the cell to a good degree. The camera with time date cell exposed has rear panel side down so the cell is behind the main board. That's what was in my memory from another person and his K-x. I prefer to take the mainboard out as shown here by member @Richard Bradford: Kx - Date requiring reset - PentaxForums.com This allows better access even for my tiny Weller WSP80N with pencil-tip.