Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
08-18-2011, 10:17 AM   #181
Pentaxian
philbaum's Avatar

Join Date: Oct 2007
Location: Port Townsend, Washington State, USA
Posts: 3,659
QuoteOriginally posted by Schraubstock Quote
Hi
This is just so strange, I had precisely the same retort from the local PENTAX agent here when I turned in my K-5 with the mirror shakes. But then they repaired the camera successfully (it seems) without any further ado. With intermittent faults like these it is usually difficult for service staff to pinpoint the exact cause, but since they were able to remedy the problem quickly, my hunch would be they ask for and received advice from PENTAX Japan.

Replaced the mainboard they said. Which is true enough but I was surprised to see in EXIF that the manufacturing date changed from the original 10.Dec10 to 04.Jul10, which means a much earlier board replaced the original one. Not quite sure what to make of this. My thinking is if in the earlier boards had faulty components which caused the faults and it got ironed out in later production models, (which is usually the case) will I face the same problem again later on? Then again mayby the older mainboards where of better quality than the newer ones ? Who knows. Also since the repair was done very quickly they must have used a mainboard that came with the first shipment of spares.

Anyway time will tell, but so far my K-5 works like a dream, absolutely no faults that a know of.

Greetings
Thanks for your reporting, yours is the only one i've seen so far that reports a successful repair. There is another post where the "top control board" was replaced and the problem reappeared.

My sense of this problem has always been that the first batches of K5s did not have this problem. I bought my K5 in February, 400xxx, and the reports of this problem on the K5 all showed up after purchases in Jan, Feb and some thereafter. (my body does not have this problem itself) Pentax factories must buy parts for their main board in bulk for a manufacturing line, and i think they must have gotten a batch of bad parts. This weaknesses is further exaggerated by fully charged batteries, but its not a problem with the batteries/chargers themselves. Its some bad batch of mainboards or some part on the mainboard.

Well thats excellent, now that we know thats its the mainboard, there is a solution that folks can ask for when they send their cameras in. Interestingly enough some K7s and Kr (see the notorius u-tube video) also have a few bodies with the problem. Perhaps this part is also common to those bodies as well.

08-19-2011, 04:55 PM   #182
Site Supporter




Join Date: Oct 2010
Location: Melbourne
Photos: Gallery
Posts: 2,913
QuoteOriginally posted by philbaum Quote
My sense of this problem has always been that the first batches of K5s did not have this problem
That is my preferred thinking now.
And you are quite right, a camera (all brands) is made up of all sorts of third party supplier parts, just like cars are, and any of those parts can and have failed in the past. Unfortunately when this happens, as in this case, it's PENTAX's name that suffers.

Greetings
08-20-2011, 03:50 AM   #183
Senior Member
geezer52's Avatar

Join Date: Jul 2009
Location: High Desert, California
Photos: Gallery
Posts: 231
philbaum/Schraubstock

Have followed this thread and similar from the beginning and my opinion matches yours. My K5 was manufactured 11/28/2010 and has almost 15K shutter activations and todate has been free of problems. That these reported problems seem to occur in time related clusters strongly suggests a bad batch of supplied parts. It's tempting to think Hoya, not loving the Pentax Camera division and knowing it would sell as soon as possible, went overly cheap in picking it's suppliers or in testing the parts it received. While in the long run I'm very hopeful with Ricoh taking charge of the Pentax name plate, in the short/immediate run I'm a bit concerned over who's watching over production during the transition period. I really like my K5 and have thought about buying a second. It would be nice to hear Ricoh has firmly taken charge and is committed to supporting the current product line with both quality hardware and firmware.
08-20-2011, 11:55 PM   #184
Site Supporter




Join Date: Oct 2010
Location: Melbourne
Photos: Gallery
Posts: 2,913
QuoteOriginally posted by geezer52 Quote
and is committed to supporting the current product line with both quality hardware and firmware.
I would imagine it couldn't be anything but full commitment, otherwise I see no reason for the purchase. One has to give company management credit sometimes. (As hard as this might be)

Greetings

09-02-2011, 08:32 AM   #185
New Member




Join Date: Feb 2011
Location: So. California
Posts: 14
C.R.I.S. "repaired mirror overrun"

Hello to all who are still following this issue. Just got my K-5 back from repair 3 days ago and put a freshly charged Pentax battery in it. So far, no malfunctions, in the first 200 shots anyway. I phoned CRIS to clarify what "Mirror Overrun" is: Supposedly it's when the charged mirror is "traveling too far" - it's going beyond the limits of the factory specifications. No parts were replaced in my camera; it sounds like they basically just tightened some nuts and bolts. Guess they're so confident in their repair, they returned my mailing label to them to make it handy for me should I need to mail it back a second time!

They also "adjusted to manufacturers specifications, general check and clean (which I don't believe; have dust spots on a few pics), and updated firmware (to 1.11)." Just find it interesting that they have such vastly different approaches to fixing the same problem. IF this fix holds up over time, then it tells me CRIS is just going after what the market will bear. [My cover letter told them I'm under a time constraint.] I'm guessing Pentax pays them more money for extensive repairs and replacement parts vs. a minor tweak.

Happy for now.
09-02-2011, 08:50 AM   #186
Senior Member
Jim Radcliffe's Avatar

Join Date: Jul 2011
Location: Dallas, Texas
Photos: Gallery
Posts: 163
My K5 returned from CRIS on Monday.. I placed a fully charged battery in the camera and have taken about 50 shots without a recurrence of the Mirror-Flops. I have been so busy at work due to hurricane Irene that I have not really had a chance to give the K5 a real workout.

They upgraded my firmware and stated they fixed the mirror-overrun issue.. other than that, that is all I received from them in the way of describing a solution.

I will let you guys know if the issue returns.
09-03-2011, 08:08 PM   #187
Site Supporter




Join Date: Oct 2010
Location: Melbourne
Photos: Gallery
Posts: 2,913
QuoteOriginally posted by OutdoorLady Quote
... just find it interesting that they have such vastly different approaches to fixing the same problem...

Hi
Perhaps there are two totally separate and different issues here. I could not have described my camera problem as a "Mirror Overrun". An overrun situation would mean to me that the mirror tilts back a second or third time after the release button was pressed, in other words the mechanism did not realize it was only to happen once, so to speak.

In my case the mirror started flopping uncontrollably as soon as I turned the camera on or started doing this after a shot was taken, would stop occasionally and could be starting anew by pressing any sort of button like Info, LV, WB, Menu, AF and the rest or turn any of the wheels on the camera. The camera had to be switched off and if this did not fix it the batteries had to be removed.

In the first scenario I can see that an adjustment of the mirror mechanism could fix this, (Perhaps a limiter switch/contact needed adjustment?) but in the second scenario (my case) in my opinion it points to a fault in the main board which has a faulty component sending the wrong message (electronically) to the mirror. The mirror mechanism hasn't got a "life" of its own but gets instructions from the main board, and in my case it was sending the wrong instructions I think. This is why the repair guys here have replaced the main board. With my limited knowledge that is the way I see it.

Greetings
09-04-2011, 07:02 AM   #188
New Member




Join Date: Feb 2011
Location: So. California
Posts: 14
QuoteOriginally posted by Schraubstock Quote
An overrun situation would mean to me that the mirror tilts back a second or third time after the release button was pressed....In my case the mirror started flopping uncontrollably as soon as I turned the camera on or started doing this after a shot was taken, would stop occasionally and could be starting anew by pressing any sort of button like Info, LV, WB, Menu, AF and the rest or turn any of the wheels on the camera.
Sometimes mine would do scenario #1, sometimes scenario #2 (and would continue indefinitely until I lifted my finger from the button/wheel). I'll leave feedback as it happens...no news equals good news. Good luck to everyone in this same boat.

09-04-2011, 11:32 AM   #189
Forum Member




Join Date: Jul 2011
Posts: 58
I'm on my second K5 at the moment...the first had to be returned due to Sensor stains. I've had the second since July 29th. Having had a few family events and a holiday, I've taken a LOT of photos in the first month. Sadly whilst on holiday last week, I ran into this shutter / mirror problem (I am assuming it is the dreaded mirror flop). Only happens on a full charge, and to varying degrees each time (the first time it just went crazy and wouldn't stop). My shutter count at the time was in the region of 5000. Sadly as I'm just over a month into ownership, I have no option but to send it for repair. It reaches a point where pressing any button or using any dial on the camera will cause the mirror to go crazy.

I'm starting to wish I'd not chosen the Pentax - the problems I've had so far just give me little confidence in the camera, which is a REAL pity as It takes such amazing photos!

I've recorded my shutter problem so am hoping to put it on youtube tomorrow - will post it up here once I've uploaded. It worries me that some people are reporting that their 'fixed' cameras have subsequently developed the same fault.
09-04-2011, 11:44 AM   #190
Veteran Member
Chex's Avatar

Join Date: Feb 2011
Location: The 'Stoke, British Columbia
Photos: Gallery
Posts: 1,700
I'm using the Pentax D-LI90 battery which is 7.2V 1860mAh(14Wh) and an Ansmann A-Pen D Li 90 7.4V 1600mAh (11.8Wh) and have not had any problems with mirror flop yet. I haven't tested it's fully charged resting voltage on a multi meter, but with a lower watt/hour rating maybe it's more related to amperage than voltage?

Last edited by Chex; 09-04-2011 at 11:51 AM.
09-04-2011, 11:44 AM   #191
Veteran Member
darrenleow's Avatar

Join Date: Feb 2009
Location: Chicago
Photos: Gallery
Posts: 541
Original Poster
After months of flopping on fully-charged batteries, my K-5 failed to trip the mirror & shutter twice today. Upon depressing the shutter button, the lens aperture blades stopped down but no picture was taken. The only way to fix this was to give the camera a firm smack with my palm. The K-5 is heading straight to CRIS once I'm back from my summer vacations, hope it holds up the rest of the way!
09-04-2011, 03:32 PM   #192
Senior Member
Jim Radcliffe's Avatar

Join Date: Jul 2011
Location: Dallas, Texas
Photos: Gallery
Posts: 163
It is quite obvious that more than a few of the K5 cameras suffer from this problem. The real question is if sooner or later will all K5 cameras suffer from the same issue? Will those which have been sent in for repair experience a recurrence of the problem?

Is it a design flaw or simply a bad batch of components? Until and if Pentax actually issues a statement regarding this problem we simply will never know.

Obviously the longer reports of this problem come in the more widespread the problem must be rather than limited to a small number of k5 cameras isolated by a particular production run.
09-05-2011, 01:25 AM   #193
Forum Member




Join Date: Jul 2011
Posts: 58
I've put a video up taken a couple of days ago showing my K5 with the problem. The camera is only 5 weeks old (thought it was 6-8 weeks when I shot the vid, but have since checked date of purchase). I'll check manufacture date when I get a chance!

09-05-2011, 10:52 AM   #194
Veteran Member
darrenleow's Avatar

Join Date: Feb 2009
Location: Chicago
Photos: Gallery
Posts: 541
Original Poster
QuoteOriginally posted by toothpick Quote
I've put a video up taken a couple of days ago showing my K5 with the problem. The camera is only 5 weeks old (thought it was 6-8 weeks when I shot the vid, but have since checked date of purchase). I'll check manufacture date when I get a chance!

Pentax K5 Mirror Flop - YouTube
That's exactly what my K-5 does.. When the battery charge drops a bit then it stabilizes and there's none of this crazy behavior.. Until the battery goes flat and it's time for a battery change If I were you I'd try to return it to the store you purchased it from and get a new set if it's not too late
09-05-2011, 12:40 PM   #195
Senior Member
Jim Radcliffe's Avatar

Join Date: Jul 2011
Location: Dallas, Texas
Photos: Gallery
Posts: 163
QuoteOriginally posted by darrenleow Quote
That's exactly what my K-5 does.. When the battery charge drops a bit then it stabilizes and there's none of this crazy behavior.. Until the battery goes flat and it's time for a battery change If I were you I'd try to return it to the store you purchased it from and get a new set if it's not too late
It's not the battery that is causing this.. my K5 was repaired and I use the same batteries I had before they repaird the camera.. the issue has not returned since the camera came back from repair.
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!
camera, dslr, firmware, grip, k-5, k-5 ii, k-5 iis, k5, pentax k-5, photo, shutter, third-party
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Pentax KX Shutter starting to stuck at slow shutter speed. Spirit722 Pentax Film SLR Discussion 7 03-03-2011 09:49 PM
Running Water: Slow Shutter and Fast Shutter Comparison Mike Cash Post Your Photos! 2 02-03-2009 01:25 AM
P30T, shutter will not reliably stay open on bulb with cable shutter control. skid2964 Pentax Film SLR Discussion 6 06-09-2008 08:04 AM



All times are GMT -7. The time now is 10:58 AM. | 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