Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
07-21-2022, 06:23 AM   #46
Pentaxian




Join Date: Feb 2014
Photos: Gallery | Albums
Posts: 408
QuoteOriginally posted by photogem Quote
Update and a very intesting story:

Here an update to a very strange problem:

I got a K-S1 which didn't work at all. It was sold for good money on ebay France as
"almost new, aperture-block-failure" (for parts only, no warranty, no return possible)

A friend purchased it and wanted to repair it but when he received the camera he couldn't switch it on, it seemed dead as dead could be.
So the camera came to me and I started to research. The fault was really odd:

As soon as the front part was back in place the camera worked but as soon as the screws insereted it stopped working.

I was puzzled but I wanted to find out and finally noticed that the problem was a tiny switch:




I decided to wait until I had another K-S1 for repair so I could measure what the proper function of this switch which finally happened last week:

This switch simply bridges two contacts for powering the K-S1 off when opening the battery-door and removing the battery.
But as soon as the battery is inserted back in and the battery-door closed the K-S1 switches on again.

This switch had been damaged by a wrong (too long) screw, it had a dimple on the top:



I removed the switch by clipping of the contacts (two red arrows) a simple solution, now one just has to switch the K-S1 on again on the main On/Off-switch if the battery is removed, that's all.
happened when the K-S1 was assembled originally and it just wasn't tested for function

I also exchanged the solenoid and then did the first 6 testshots. Then I uploaded the last photo to find out the shuttercount: It was 6!!!

So I got curious.
Through good contacts and the serialnumber I could verify the history if this Pentax:
It was regularely sold in UK by a Pentax dealer but returned because it didn't work at all.
Ricoh couldn't find the fault and chucked it.

Somebody close to the repairshow somehow got hold of it and then sent it to his brother in France who finally sold it on ebay France
(both knowing it didn't work... the UK adress was still under the French shipping label!)
Interesting, and yet another brick in our wall of knowledge!
I also would bypass all of these needless switches that just present yet another possibility for a fault or failure.

In another field I once had an early Honda Mk2 Accord that was totally reliable, until I took a fast right-hand bend near our home at any speed in excess of 50MPH, at which point the ignition died and I had to coast to a halt at the very conveniently placed layby some 100 yards further on.A couple of minutes rest, and it started and drove faultlessly again. I mentioned this to a friend who I was giving a lift to a few days later, and as I spoke the words in the middle of the same corner the ignition died again!

My local Honda dealer solved the problem. It transpired the designers had incorporated an ignition kill-switch in the engine so that if the oil pressure dropped, it would protect the engine. It seems the oil surge caused by my cornering at speed had tricked the switch into a 'low oil pressure' mode, and killed the ignition. However I decided that if, for some inexplicable reason, the same situation occurred in the fast lane of a motorway, for example, the last thing I wanted was a dead engine and three lanes of fast-moving traffic to negotiate! better a damaged engine ( or not) than causing a serious accident. So I had it bypassed, and no more problems.

Sometimes designers can be too clever for their own good, and simplicity and functionality wins every time for me.

05-01-2023, 09:41 AM - 1 Like   #47
New Member




Join Date: Apr 2017
Posts: 9
K-S1 Solenoid Replacement

Just replaced the solenoid in my K-S1

Simple fix. It took more time to remove the screws than it did to replace the solenoid. In the process I lost one tiny screw, but it is the screw hidden under the HDMI/USB label, so no big deal.

I purchased the camera on Woot.com in 2017, and paid $236 for it. Photos were always slightly under-exposed, but I could compensate for it. After replacing the solenoid, photos look like they are exposed correctly. At times I could not understand why pictures did not come out the way I expected, though it was a lack of understanding or user error - turns out it may have been both or intermittent solenoid issue.

Thanks for the solenoid replacement tutorial.
05-14-2023, 01:49 AM   #48
New Member




Join Date: May 2023
Posts: 1
Thanks for the repair manual

Hello.

I just want to thanks photogem for his repair manual.
I've just fixed my Pentax K-S1 (bought for 12$ at the flee market yesterday).
It was the solenoid and i've just cleaned it and put a little WD40 and 'voila' it's magic !

See you and have a nice day.
Attached Images
 
05-14-2023, 05:18 AM   #49
Site Supporter
Site Supporter




Join Date: Apr 2015
Posts: 3,520
Original Poster
QuoteOriginally posted by Egenius Quote
Hello.

I just want to thanks photogem for his repair manual.
I've just fixed my Pentax K-S1 (bought for 12$ at the flee market yesterday).
It was the solenoid and i've just cleaned it and put a little WD40 and 'voila' it's magic !

See you and have a nice day.
Thanks for thanking me but...

you know this tutorial is for the exchange of the solenoid.

Having a lubed solenoid working again is luck and will help for a while, but it is no permanent solution.

Just taking the plunger of already helps (for a short while) and then re magnetisation is even stronger.
We had a lubed plunger here already but with graphite. It worked a while and then was stuck again.

06-12-2023, 05:16 AM   #50
Veteran Member




Join Date: Feb 2009
Photos: Albums
Posts: 621
the right side plastic picture, took me a while to figure how to remove it, so my comments, from the HDMI cover pry it straight up, picture might help to understand (srry could not upload pic)
06-12-2023, 08:36 AM   #51
Pentaxian




Join Date: Feb 2014
Photos: Gallery | Albums
Posts: 408
QuoteOriginally posted by uttam.hathi Quote
the right side plastic picture, took me a while to figure how to remove it, so my comments, from the HDMI cover pry it straight up, picture might help to understand (srry could not upload pic)
Not quite sure why it needs clarification-Photogem's photo and instructions are quite unambiguous- "3. Removal of screws right side: Open the HDMI/USB rubberdoor. Take off the HDMI/USB-sticker! Now you have access to the 2nd screw holding the plastic-side-piece. Unscrew it and take the plastic-side-piece off. Now you have access to 4 more screws, but you only need to unscrew the 2x front screws" , plus a photo clearly showing the removed HDMI cover, and the section where it was.
06-12-2023, 10:04 PM   #52
Site Supporter
Site Supporter




Join Date: Apr 2015
Posts: 3,520
Original Poster
Oh... I do understand @uttam.hathi, with an extra photo one can understand it better!

The tutorials can be found as well in the DIY section. There I am always able to change the original post and so I did, adding another photo to show how this plastic-piece is fixed because once another person had difficulties:
Manual: Solenoid replacement: Pentax K-S1 - PentaxForums.com

I have meanwhile done so many K-S1's that I would write the tutorial in a different way, when I find time I will do so in the DIY section and then ask Mark Jerling to change it here as well.

06-13-2023, 12:24 AM   #53
Pentaxian




Join Date: Feb 2014
Photos: Gallery | Albums
Posts: 408
QuoteOriginally posted by photogem Quote
Oh... I do understand @uttam.hathi, with an extra photo one can understand it better!

The tutorials can be found as well in the DIY section. There I am always able to change the original post and so I did, adding another photo to show how this plastic-piece is fixed because once another person had difficulties:
Manual: Solenoid replacement: Pentax K-S1 - PentaxForums.com

I have meanwhile done so many K-S1's that I would write the tutorial in a different way, when I find time I will do so in the DIY section and then ask Mark Jerling to change it here as well.
Perhaps I understand how your brain works, which is why I didn't find any problems with that set of instructions. But more photos are never wasted-perhaps you should start doing Youtube videos, with links from here?!
06-13-2023, 01:34 AM   #54
Site Supporter
Site Supporter




Join Date: Apr 2015
Posts: 3,520
Original Poster
QuoteOriginally posted by martin42mm Quote
Perhaps I understand how your brain works, which is why I didn't find any problems with that set of instructions. But more photos are never wasted-perhaps you should start doing Youtube videos, with links from here?!
No, videos are not "my cup of tea", particular not Youtube videos. Not going to start this.
06-13-2023, 04:09 AM   #55
Pentaxian




Join Date: Feb 2014
Photos: Gallery | Albums
Posts: 408
QuoteOriginally posted by photogem Quote
No, videos are not "my cup of tea", particular not Youtube videos. Not going to start this.
Thought you might improve on some of them ! But I know what you mean about video-I don't even like anyone watching when I'm working, especially if it someone else's precious camera/lens/watch....plus watching some of these videos makes me constantly want to yell 'No, not like that!'.

Last edited by martin42mm; 06-13-2023 at 04:10 AM. Reason: typo
06-14-2023, 05:10 AM   #56
Veteran Member




Join Date: Feb 2009
Photos: Albums
Posts: 621
QuoteOriginally posted by martin42mm Quote
Not quite sure why it needs clarification-Photogem's photo and instructions are quite unambiguous- "3. Removal of screws right side: Open the HDMI/USB rubberdoor. Take off the HDMI/USB-sticker! Now you have access to the 2nd screw holding the plastic-side-piece. Unscrew it and take the plastic-side-piece off. Now you have access to 4 more screws, but you only need to unscrew the 2x front screws" , plus a photo clearly showing the removed HDMI cover, and the section where it was.
not that easy as i just changed the solenoid taking is from my old istDL, it took me a while how to remove the plastic piece

https://www.flickr.com/photos/34859797@N07/52974378873/in/dateposted-public/

Last edited by uttam.hathi; 06-14-2023 at 05:17 AM. Reason: adding picture link for clarity
06-14-2023, 06:16 AM   #57
Pentaxian




Join Date: Feb 2014
Photos: Gallery | Albums
Posts: 408
QuoteOriginally posted by uttam.hathi Quote
not that easy as i just changed the solenoid taking is from my old istDL, it took me a while how to remove the plastic piece

KS1 rightside plastic | uttam.hathi | Flickr
You'll know how to do it next time, anyway! I must admit that even if I've never taken a specific camera apart, after doing it for so many years you get a sixth sense on where to find hidden screws that manufacturers delight in hiding. Plus I don't like being beaten by a camera or lens repair....
06-15-2023, 09:47 PM   #58
Veteran Member




Join Date: Feb 2009
Photos: Albums
Posts: 621
QuoteOriginally posted by martin42mm Quote
You'll know how to do it next time, anyway! I must admit that even if I've never taken a specific camera apart, after doing it for so many years you get a sixth sense on where to find hidden screws that manufacturers delight in hiding. Plus I don't like being beaten by a camera or lens repair....
09-26-2023, 02:49 PM - 4 Likes   #59
Site Supporter
Site Supporter
MiguelATF's Avatar

Join Date: Jun 2010
Location: Somewhere in Southern Oregon
Photos: Gallery | Albums
Posts: 464
Successful solenoid surgery/replacement on my K-S1

Just quickly wanted to thank Photogem for his excellent tutorial. My K-S1, bought inexpensively from an eBay seller, suffered from the dreaded ABF. I acquired a replacement Solenoid from a seller in Britain who had taken it out of a K200d. My local (southern Oregon) shop which specializes in the repair of electronic gadgets (everything from iPhones to iPods to various laptops) was willing to have a go at it. I waited with bated breath for several days and... success! The transplant worked! I'm attaching two photos - one of Aaron, the brilliant 'tech' in Ashland, Oregon, who did the surgery/transplant for me (seen here holding the failed solenoid which he removed) - and another photo, of the bud of a Zinnia flower in my garden...
It's great to have the K-S1 fully functional once more!
(both photos taken with my DA 40 XS lens)
Attached Images
View Picture EXIF
PENTAX K-S1  Photo 
View Picture EXIF
PENTAX K-S1  Photo 
09-27-2023, 01:07 AM - 1 Like   #60
Pentaxian




Join Date: Feb 2014
Photos: Gallery | Albums
Posts: 408
QuoteOriginally posted by MiguelATF Quote
Just quickly wanted to thank Photogem for his excellent tutorial. My K-S1, bought inexpensively from an eBay seller, suffered from the dreaded ABF. I acquired a replacement Solenoid from a seller in Britain who had taken it out of a K200d. My local (southern Oregon) shop which specializes in the repair of electronic gadgets (everything from iPhones to iPods to various laptops) was willing to have a go at it. I waited with bated breath for several days and... success! The transplant worked! I'm attaching two photos - one of Aaron, the brilliant 'tech' in Ashland, Oregon, who did the surgery/transplant for me (seen here holding the failed solenoid which he removed) - and another photo, of the bud of a Zinnia flower in my garden...
It's great to have the K-S1 fully functional once more!
(both photos taken with my DA 40 XS lens)
Glad you got your K-S1 going again, as I did with mine , having the fortune to have a Pentax-spproved Service agent in the UK ( John Pye) who will sell the latest Pentax approved solenoid direct to UK residents ( sadly no exports-too much customs red-tape).
I also bought a KP as an insurance, but I still have a soft spot for my K-S1 and its diminutive size.
I actually did the repair myself, and if you follow Photogem's guide, you will get there, and have the satisfaction of a job well done. Next time, perhaps ( with another failed camera, of course!)
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!
access, aperture block failure, battery, front, k-s1, k-s2, made in japan, metal, pentax k-s1, photo, repair, rubber, screw, screws, selenoid, solenoid
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Manual solenoid replacement Pentax K30 / Discharge flash-condenser / Solenoid choice photogem Pentax K-30 & K-50 204 03-20-2024 01:14 AM
Solenoid replacement BugsDogsAndSunsets Pentax K-S1 & K-S2 13 02-04-2021 01:25 PM
Genuine Aperture Solenoid Plunger Part K-30 K-50 K-S1/S2 K-500 jhaji Repairs and Warranty Service 2 04-24-2019 03:40 PM
Who can repair a K-30 aperture block if I have the white solenoid? steamloco76 Repairs and Warranty Service 14 04-14-2019 06:20 PM



All times are GMT -7. The time now is 01:57 PM. | See also: NikonForums.com, CanonForums.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