My K3 is Dropping the Date

**PKMike** · 05-31-2023, 07:19 AM

In my case the K-r drops the date every time the camera is powered off and then back on (without removing the battery). My friend's K-70 does the same. This is more problematic than only dropping the date when battery is changed. Anyone else experienced this?

35mmfilmfan · 05-31-2023, 11:05 AM

Would using the mains adapter (powered on) have the same effect as leaving a charged battery inserted ? I know this does not charge the battery.

**mlag** · 05-31-2023, 12:09 PM

Originally posted by Wheatfield

I tried that with my K3. It didn't help. I think once the internal battery is dead, it isn't going to zombie back to life.

There is indeed only a thin line between depleting it to almost 0% without damage and really 0% and killing it....but trying to revive it is worth trying.

---------- Post added 31-05-23 at 12:10 ----------

Originally posted by 35mmfilmfan

Would using the mains adapter (powered on) have the same effect as leaving a charged battery inserted ? I know this does not charge the battery.

I suppose it is ...

**photogem** · 05-31-2023, 01:29 PM

It is for sure the C-MOS battery (also called backup battery).
The problem here: It is much more complicated to replace or even get close to it than with the K-30 which
I showed HERE
The battery is located on the backside of the mainboard, so this has to be unsoldered completly to get at it. Just to unsolder it partly is not enough, you have to be able to turn the mainboard around.
Reviving the C-MOS isn't working with the K3 when it is depleted.
One has to accept facts or take on quite a demanding DIY lesson.
Having it repaired is about as expensive as buying a 2-nd hand K3!

**photogem** · 05-31-2023, 01:36 PM

Originally posted by 35mmfilmfan

Would using the mains adapter (powered on) have the same effect as leaving a charged battery inserted ? I know this does not charge the battery.

What would the benefit of doing this?
You can't revive the C-MOS with the mains-adapter. Even if you change the "Power-Off" to not power off anymore and leave the K3 (or K5-Series) on the mains-adapter overnight, it won't revive the C-MOS!

kypfer · 05-31-2023, 01:46 PM

Originally posted by photogem

You can't revive the C-MOS with the mains-adapter. Even if you change the "Power-Off" to not power off anymore and leave the K3 (or K5-Series) on the mains-adapter overnight, it won't revive the C-MOS!

I can confirm this … I tried it with my K-01!

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05-31-2023, 07:19 AM	#16
PKMike Site Supporter Join Date: Nov 2013 Location: Idaho Posts: 628	In my case the K-r drops the date every time the camera is powered off and then back on (without removing the battery). My friend's K-70 does the same. This is more problematic than only dropping the date when battery is changed. Anyone else experienced this?

05-31-2023, 11:05 AM	#17
35mmfilmfan Pentaxian Join Date: Oct 2016 Location: Norfolk, UK Posts: 4,339	Would using the mains adapter (powered on) have the same effect as leaving a charged battery inserted ? I know this does not charge the battery.

05-31-2023, 12:09 PM	#18
mlag Loyal Site Supporter Join Date: Jul 2021 Location: Zuiderkempen - Grote Netewoud - Belgium Photos: Gallery \| Albums Posts: 1,410	Originally posted by Wheatfield I tried that with my K3. It didn't help. I think once the internal battery is dead, it isn't going to zombie back to life. There is indeed only a thin line between depleting it to almost 0% without damage and really 0% and killing it....but trying to revive it is worth trying. ---------- Post added 31-05-23 at 12:10 ---------- Originally posted by 35mmfilmfan Would using the mains adapter (powered on) have the same effect as leaving a charged battery inserted ? I know this does not charge the battery. I suppose it is ...

05-31-2023, 01:29 PM	#19
photogem Site Supporter Join Date: Apr 2015 Posts: 3,524	It is for sure the C-MOS battery (also called backup battery). The problem here: It is much more complicated to replace or even get close to it than with the K-30 which I showed HERE The battery is located on the backside of the mainboard, so this has to be unsoldered completly to get at it. Just to unsolder it partly is not enough, you have to be able to turn the mainboard around. Reviving the C-MOS isn't working with the K3 when it is depleted. One has to accept facts or take on quite a demanding DIY lesson. Having it repaired is about as expensive as buying a 2-nd hand K3!

05-31-2023, 01:36 PM	#20
photogem Site Supporter Join Date: Apr 2015 Posts: 3,524	Originally posted by 35mmfilmfan Would using the mains adapter (powered on) have the same effect as leaving a charged battery inserted ? I know this does not charge the battery. What would the benefit of doing this? You can't revive the C-MOS with the mains-adapter. Even if you change the "Power-Off" to not power off anymore and leave the K3 (or K5-Series) on the mains-adapter overnight, it won't revive the C-MOS!

05-31-2023, 01:46 PM	#21
kypfer Pentaxian Join Date: Jan 2018 Location: Jersey C.I. Posts: 3,597	Originally posted by photogem You can't revive the C-MOS with the mains-adapter. Even if you change the "Power-Off" to not power off anymore and leave the K3 (or K5-Series) on the mains-adapter overnight, it won't revive the C-MOS! I can confirm this … I tried it with my K-01!