K50 pictures completely dark


richandfleur

Link Posted 05/03/2017 - 21:34
I still shake my head every time I read one of these. Pentax have just walked away from this and it does nothing to convince me they give a damn.

By all accounts there is a faulty batch of components used in the K-30/K-50 period cameras. It's been the same mechanism for years, but something went wrong around this period. It's a tiny solenoid, and it's used in lots of electronics, such as laptop drive release mechanisms etc.




To repair properly, this will need to be replaced. I had mine done (just inside the warranty period) by Johnsons Photopia, and it's been working fine again ever since.

paolo11

Link Posted 05/03/2017 - 21:39
I had forgotten about it until I read about a new member having the same problem. And all the swearing came back as Pentax just won't do anything about it.

Only good thing is that the new Pentax cameras no longer use this aperture block.

ATXphotog

Link Posted 05/03/2017 - 21:46
Thanks! I'll check that out.

paolo11 wrote:
I sent mine out to CA, cost 100.00 plus shipping. The guy works on all different brands of cameras for about 20 years gives a year warranty.

google pentaxcamerarepair.com

So far, it been okay, about 2 months into repair.

I would set mine to sport mode, fire off about 5 - 8 shots, then it would work, turn off, then same problem.

There are people who repair the camera by filing down a "plunger". You can find this by searching, some good instructions.

Some had a slow degrade, while others when bad fast like mine, about 1200 shots.

paolo11

Link Posted 05/03/2017 - 21:52
Oh yes, Instructions I've seen are on Pentax forum, belong to both.

richandfleur

Link Posted 05/03/2017 - 22:20
paolo11 wrote:
Only good thing is that the new Pentax cameras no longer use this aperture block.

I don't think that's necessarily correct. The mechanism is the same across many models, but I think the quality control issues of the units supplied have been addressed. Technically any model that uses the 1/6000s max shutter speed is likely using this component, which probably includes the new KP for example.

The part didn't cause any issues in the past, and hopefully wont in the future, but there is a block in the middle that is suspect. Some users just struck it lucky and didn't have any issues with their K-30/K-50 models. Others weren't quite so lucky...

paolo11

Link Posted 06/03/2017 - 13:28
I asked a Pentax rep, and that's what I was told. with the k1 which uses a DC motor, aperture block isn't needed. I know the K70 doesn't use it (according to Pentax.)

I'm sure they got a bad batch of aperture blocks, and hopefully they corrected the problem. But seeing the K50 isn't manufactured any longer, B & H and Adorama no longer has them, it's become a mute point except for the hapless owners.

JW

Link Posted 11/03/2017 - 11:43
Hi

I have same problem except when using the Live screen to take the pictures - is there anything different with the aperture motor use depending on whether using live screen or viewfinder?

Cheers
JW
Last Edited by JW on 11/03/2017 - 11:44

paolo11

Link Posted 11/03/2017 - 14:30
JW wrote:
Hi

I have same problem except when using the Live screen to take the pictures - is there anything different with the aperture motor use depending on whether using live screen or viewfinder?

Cheers
JW

paolo11

Link Posted 11/03/2017 - 14:34
Not 100% sure, my LV was very dim. if i had to make a guess, you have the same problem. Does it work okay at a smaller aperture setting? Is it dark when you go to wide open aperture? That's the tell tale.

I could get mine to work in "sport mode", then when turning off/on, problem would repeat.

It would work fine in Manual mode.

zmem

Link Posted 02/04/2017 - 00:01
I have read that because the Pentax DA 55- 300 PLM lens works differently , it may resolve the problems. Others on the form may be able to explain the tech part better.
As for me , I have no issues with my K -50 and now for the most part , I keep that lens permantly attached to the camera. Hope this helps

paolo11

Link Posted 02/04/2017 - 13:39
zmem wrote:
I have read that because the Pentax DA 55- 300 PLM lens works differently , it may resolve the problems. Others on the form may be able to explain the tech part better.
As for me , I have no issues with my K -50 and now for the most part , I keep that lens permantly attached to the camera. Hope this helps

paolo11

Link Posted 02/04/2017 - 13:47
Interesting. Because of the warranty, I re-mailed my K50 out as it failed after the repair. It did work fine in manual mode with any of my lenses. I also have the same lens, DA 55 to 300 mm, but didn't try it. I also have a DA -L 55 - 200 mm lens, and that also failed. Aperture is stuck in small aperture setting.

If it fails again in the future, I'll use it only in the manual mode for macro shots.

Happy to hear you are having good luck with your K50.

Pilo

Link Posted 28/07/2017 - 18:02
paolo11 wrote:
JW wrote:
Hi

I have same problem except when using the Live screen to take the pictures - is there anything different with the aperture motor use depending on whether using live screen or viewfinder?

Cheers
JW


Pilo

Link Posted 28/07/2017 - 18:17
same thing here Paolo, Live View OK, viewfinder use => pictures black, only black (K50).
Will go for a K70 next week, and maybe I shall have some pictures "with color" then...?!
I took only 150 pictures with that stupid thing and, of course, no warranty anymore

grtz

Chr.

paolo11

Link Posted 31/07/2017 - 14:08
Hi Everyone,

Since the 2nd repair by the CA guy, wife has told me her K50 is still working fine I keep telling her to shoot in the large aperture mode to check for problem each time she uses it.

I wish I knew what he did, but it's his trade secret and this is his living, so I understand. Real nice guy to deal with.

First repair lasted 2 months, and the 2nd repair has been about 4 months. If the K50 fails again, that's it, I'll just use it in manual mode and perhaps get my wife a K70. In time, we should get an idea on the K70 from users.

I'm deeply in bed with Pentax, so I have to hang in. My K1 and k3 have both been working fine. I haven't done any updates in firmware on either one, guess I'm a scary cat on this as both cameras do what I want so why look for problems with a corrupt D/L. If the K50 fails again, I'll try a firmware update for experience.

I've heard Pentax has owned up in some cases on the aperture problem, perhaps they will continue if you complain loud enough.

Best of luck to all of you.
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