Both my K-01s have stucked shutters

HoundFrog · 02-11-2022, 09:00 AM - **1 Like**

Originally posted by pimpim

ouch

Probably harder to replace than the infamous aperture solenoid?

I bet! You'll have to disassemble pretty much the whole camera. What's worse, then you have to assemble it back

normhead · 02-11-2022, 09:08 AM

I don't know what type of shutters they have, but back in the day the shutter guides could wear enabling the shutter to jam. Once that happened there was no point in replacing the shutter.

HoundFrog · 02-11-2022, 10:07 AM - **1 Like**

Originally posted by normhead

I don't know what type of shutters they have, but back in the day the shutter guides could wear enabling the shutter to jam. Once that happened there was no point in replacing the shutter.

This is happening to cameras with pretty low shutter count, 5-10k. That's why solenoid(s) are under suspicion.

pimpim · 02-11-2022, 03:02 PM

Originally posted by HoundFrog

This is happening to cameras with pretty low shutter count, 5-10k. That's why solenoid(s) are under suspicion.

but then still, why would the K-01 have different shutter solenoids than other pentax cameras? one would see the same issue at other models, right? Wasn't the K-01 based on the K-30?

HoundFrog · 02-11-2022, 05:53 PM

I am just not following the threads of K-30 owners

Abbazz · 02-11-2022, 07:13 PM

Originally posted by pimpim

but then still, why would the K-01 have different shutter solenoids than other pentax cameras? one would see the same issue at other models, right? Wasn't the K-01 based on the K-30?

There is one important difference between the K-01 and all other Pentax DSLR cameras: the K-01 is a mirrorless camera. It means that the shutter has to be opened to allow framing, while it is closed on DSLR cameras because framing is done with the image reflected through the optical finder and the shutter is located behind the mirror. On a mirrorless camera like the K-01 (or on DSLRs used in Live
mode), the shutter is open for framing so the image from the lens can reach the sensor. When the user takes a photo, the shutter first closes then the diaphragm of the lens is closed down to the set aperture, the sensor is flushed, the shutter reopens for the duration set by the user then closes again to end the exposure and finally the shutter opens again in order to allow the LCD to resume displaying the live view stream.

So, when you press the shutter release on a DSLR, the shutter opens and closes one time. When you do the same on the K-01, the shutter closes and reopens two times. That's twice as much, so it's normal there is much more wear on the K-01 shutter and that more shutter failures are observed on the mirroless camera compared to DSLR cameras equipped with the same shutter.

Cheers!

Abbazz

MarkJerling · 02-11-2022, 07:55 PM

Originally posted by HoundFrog

I've heard of such stories. Could be another solenoid issue (shutter has two).

I do not believe the shutter is solenoid driven. All the images I've seen of the inside of K-01 cameras show the same stepper type shutter motor as other Pentax cameras.

(Not my image)

kypfer · 02-12-2022, 01:40 AM - **1 Like**

Originally posted by MarkJerling

I do not believe the shutter is solenoid driven. All the images I've seen of the inside of K-01 cameras show the same stepper type shutter motor as other Pentax cameras.
(Not my image)

Is that not the aperture motor depicted in that picture?

HoundFrog · 02-12-2022, 03:13 AM - **1 Like**

Aperture. Typical shutter has two solenoids. Motor too, but curtains, when cocked, are being hold by solenoids.

---------- Post added 02-12-22 at 10:28 AM ----------

Originally posted by Abbazz

That's twice as much

Twice the "low count" is still the low count. Well, maybe medium. But I think you may be up to something.

The fact that the shutter is mostly open means that the curtains holding solenoids are mostly energized. So the parasitic magnetic effect is more likely to manifest itself.

pimpim · 02-12-2022, 01:14 PM

This thread helped me not wasting my nerves on trying the K-01, I must admit I was considering it due to its absolute quirkiness and unfitness for both photo and video

MarkJerling · 02-12-2022, 04:21 PM

Originally posted by kypfer

Is that not the aperture motor depicted in that picture?

My mistake, yes it is.

MarkJerling · 02-12-2022, 04:22 PM

Originally posted by HoundFrog

Aperture. Typical shutter has two solenoids. Motor too, but curtains, when cocked, are being hold by solenoids.

---------- Post added 02-12-22 at 10:28 AM ----------

Twice the "low count" is still the low count. Well, maybe medium. But I think you may be up to something.

The fact that the shutter is mostly open means that the curtains holding solenoids are mostly energized. So the parasitic magnetic effect is more likely to manifest itself.

Can you post a photo of the "shutter solenoids"?

**i_trax** · 02-12-2022, 05:45 PM - **1 Like**

Originally posted by MarkJerling

Can you post a photo of the "shutter solenoids"?

Hm , I didn't hear about "shutter solenoids" in K-01.
Could someone confirm this please.
I have a black one and still going strong , fingers crossed.

P.S.: I have K-30 + K-50 with " dead" solenoids and do not really need any more of those......

HoundFrog · 02-13-2022, 04:00 AM - **1 Like**

Here's the video of a generic DSLR shutter (you may want to mute the sound). At the end you can see that each curtain has a solenoid.

You Tube

I don't have a photo/video of Pentax shutter.

**Henrico** · 02-21-2022, 03:15 PM

Welcome to the party, it seems to be a common failure, mine suffered the same: K-01 shutter stuck - PentaxForums.com

What might be the cause the K-01 shutter is a DSLR shutter. But using it in a mirror-less system the two solenoids in the shutter are continuously activated to keep the curtains opened. Those are not engineered for that.

Mine had only 12.000 exposures (24.000 compared with a real DSLR, see above). But that is nothing.

So far nobody reported a fix, replacing a shutter is not done by Pentax service centers (no spare parts available) and replacing the solenoids by yourself demand skills almost nobody has...

I thank my K-01 for 9 years of service, I replaced it for a KP and maybe, hopefully, once there will be a K-mount MILC with EVF and all the advantages nowadays MILCs offer.

02-11-2022, 07:13 PM	#21
Abbazz Pentaxian Join Date: Nov 2006 Location: Jakarta Posts: 667	Originally posted by pimpim but then still, why would the K-01 have different shutter solenoids than other pentax cameras? one would see the same issue at other models, right? Wasn't the K-01 based on the K-30? There is one important difference between the K-01 and all other Pentax DSLR cameras: the K-01 is a mirrorless camera. It means that the shutter has to be opened to allow framing, while it is closed on DSLR cameras because framing is done with the image reflected through the optical finder and the shutter is located behind the mirror. On a mirrorless camera like the K-01 (or on DSLRs used in Live mode), the shutter is open for framing so the image from the lens can reach the sensor. When the user takes a photo, the shutter first closes then the diaphragm of the lens is closed down to the set aperture, the sensor is flushed, the shutter reopens for the duration set by the user then closes again to end the exposure and finally the shutter opens again in order to allow the LCD to resume displaying the live view stream. So, when you press the shutter release on a DSLR, the shutter opens and closes one time. When you do the same on the K-01, the shutter closes and reopens two times. That's twice as much, so it's normal there is much more wear on the K-01 shutter and that more shutter failures are observed on the mirroless camera compared to DSLR cameras equipped with the same shutter. Cheers! Abbazz Last edited by Abbazz; 02-11-2022 at 07:24 PM.

02-12-2022, 03:13 AM - 1 Like	#24
HoundFrog Pentaxian Join Date: May 2011 Location: Prague, Czechia Posts: 596	Aperture. Typical shutter has two solenoids. Motor too, but curtains, when cocked, are being hold by solenoids. ---------- Post added 02-12-22 at 10:28 AM ---------- Originally posted by Abbazz That's twice as much Twice the "low count" is still the low count. Well, maybe medium. But I think you may be up to something. The fact that the shutter is mostly open means that the curtains holding solenoids are mostly energized. So the parasitic magnetic effect is more likely to manifest itself. Last edited by HoundFrog; 02-12-2022 at 03:32 AM.

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02-11-2022, 09:00 AM - 1 Like	#16
HoundFrog Pentaxian Join Date: May 2011 Location: Prague, Czechia Posts: 596	Originally posted by pimpim ouch Probably harder to replace than the infamous aperture solenoid? I bet! You'll have to disassemble pretty much the whole camera. What's worse, then you have to assemble it back

02-11-2022, 09:08 AM	#17
normhead Pentaxian Join Date: Jun 2007 Location: Near Algonquin Park Photos: Gallery \| Albums Posts: 40,451	I don't know what type of shutters they have, but back in the day the shutter guides could wear enabling the shutter to jam. Once that happened there was no point in replacing the shutter.

02-11-2022, 10:07 AM - 1 Like	#18
HoundFrog Pentaxian Join Date: May 2011 Location: Prague, Czechia Posts: 596	Originally posted by normhead I don't know what type of shutters they have, but back in the day the shutter guides could wear enabling the shutter to jam. Once that happened there was no point in replacing the shutter. This is happening to cameras with pretty low shutter count, 5-10k. That's why solenoid(s) are under suspicion.

02-11-2022, 03:02 PM	#19
pimpim Senior Member Join Date: Sep 2010 Location: Mainz Photos: Albums Posts: 253	Originally posted by HoundFrog This is happening to cameras with pretty low shutter count, 5-10k. That's why solenoid(s) are under suspicion. but then still, why would the K-01 have different shutter solenoids than other pentax cameras? one would see the same issue at other models, right? Wasn't the K-01 based on the K-30?

02-11-2022, 05:53 PM	#20
HoundFrog Pentaxian Join Date: May 2011 Location: Prague, Czechia Posts: 596	I am just not following the threads of K-30 owners

02-11-2022, 07:55 PM	#22
MarkJerling Moderator Site Supporter Join Date: May 2012 Location: Wairarapa, New Zealand Photos: Gallery \| Albums Posts: 20,421	Originally posted by HoundFrog I've heard of such stories. Could be another solenoid issue (shutter has two). I do not believe the shutter is solenoid driven. All the images I've seen of the inside of K-01 cameras show the same stepper type shutter motor as other Pentax cameras. (Not my image)

02-12-2022, 01:40 AM - 1 Like	#23
kypfer Pentaxian Join Date: Jan 2018 Location: Jersey C.I. Posts: 3,595	Originally posted by MarkJerling I do not believe the shutter is solenoid driven. All the images I've seen of the inside of K-01 cameras show the same stepper type shutter motor as other Pentax cameras. (Not my image) Is that not the aperture motor depicted in that picture?

02-12-2022, 01:14 PM	#25
pimpim Senior Member Join Date: Sep 2010 Location: Mainz Photos: Albums Posts: 253	This thread helped me not wasting my nerves on trying the K-01, I must admit I was considering it due to its absolute quirkiness and unfitness for both photo and video

02-12-2022, 04:21 PM	#26
MarkJerling Moderator Site Supporter Join Date: May 2012 Location: Wairarapa, New Zealand Photos: Gallery \| Albums Posts: 20,421	Originally posted by kypfer Is that not the aperture motor depicted in that picture? My mistake, yes it is.

02-12-2022, 04:22 PM	#27
MarkJerling Moderator Site Supporter Join Date: May 2012 Location: Wairarapa, New Zealand Photos: Gallery \| Albums Posts: 20,421	Originally posted by HoundFrog Aperture. Typical shutter has two solenoids. Motor too, but curtains, when cocked, are being hold by solenoids. ---------- Post added 02-12-22 at 10:28 AM ---------- Twice the "low count" is still the low count. Well, maybe medium. But I think you may be up to something. The fact that the shutter is mostly open means that the curtains holding solenoids are mostly energized. So the parasitic magnetic effect is more likely to manifest itself. Can you post a photo of the "shutter solenoids"?

02-12-2022, 05:45 PM - 1 Like	#28
i_trax Loyal Site Supporter Join Date: Jan 2011 Location: Perth Western Australia Photos: Gallery \| Albums Posts: 2,621	Originally posted by MarkJerling Can you post a photo of the "shutter solenoids"? Hm , I didn't hear about "shutter solenoids" in K-01. Could someone confirm this please. I have a black one and still going strong , fingers crossed. P.S.: I have K-30 + K-50 with " dead" solenoids and do not really need any more of those......

02-21-2022, 03:15 PM	#30
Henrico Loyal Site Supporter Join Date: Jun 2013 Location: Utrecht Photos: Gallery Posts: 255	Welcome to the party, it seems to be a common failure, mine suffered the same: K-01 shutter stuck - PentaxForums.com What might be the cause the K-01 shutter is a DSLR shutter. But using it in a mirror-less system the two solenoids in the shutter are continuously activated to keep the curtains opened. Those are not engineered for that. Mine had only 12.000 exposures (24.000 compared with a real DSLR, see above). But that is nothing. So far nobody reported a fix, replacing a shutter is not done by Pentax service centers (no spare parts available) and replacing the solenoids by yourself demand skills almost nobody has... I thank my K-01 for 9 years of service, I replaced it for a KP and maybe, hopefully, once there will be a K-mount MILC with EVF and all the advantages nowadays MILCs offer.