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Forum: Pentax K-30 & K-50 06-15-2019, 05:01 AM  
K-50 / K-500 Aperture Solenoid fix (DIY with pics)
Posted By bigyinn
Replies: 417
Views: 109,599
I'd hardly describe a K50 as a potatoe. 😤
Forum: Pentax K-30 & K-50 05-17-2018, 03:56 AM  
K-50 / K-500 Aperture Solenoid fix (DIY with pics)
Posted By bigyinn
Replies: 417
Views: 109,599
Whoops! Other than try a different battery I'm not sure what to suggest. Hope you can get it working again!
Forum: Pentax K-30 & K-50 03-08-2018, 02:58 AM  
K-50 / K-500 Aperture Solenoid fix (DIY with pics)
Posted By bigyinn
Replies: 417
Views: 109,599
One has to swap cables.

---------- Post added 03-08-18 at 02:34 AM ----------


Aaah, misunderstood you. I thought you were talking about the polarity of the magnet.

I understand about the cables being swapped over, meaning the horsehoe will move in opposite directions depending on the current flow through the coils.

Going back to the magnet, you say the holding force is greater on the white solenoids, which will be due to the magnet located in the middle between the coils at the top. I havent got a solenoid to hand at the moment, but would removing the magnet in the white solenoid and replacing it with the magnet from the green solenoid fix that? Assuming its possible to remove the magnet in the first place?
Forum: Pentax K-30 & K-50 03-08-2018, 01:40 AM  
K-50 / K-500 Aperture Solenoid fix (DIY with pics)
Posted By bigyinn
Replies: 417
Views: 109,599
Just a thought, would it be feasible to swap just the magnet from the green K50 solenoid to the white solenoid from the MZ7 to obtain the correct polarity and holding force?
Forum: Pentax K-30 & K-50 03-07-2018, 05:27 AM  
K-50 / K-500 Aperture Solenoid fix (DIY with pics)
Posted By bigyinn
Replies: 417
Views: 109,599
So the flash release solenoid will not work correctly if used in he K50? I assume the other (on the left) would be ok to replace the green solenoid found in the K50?
Forum: Pentax K-30 & K-50 02-26-2018, 10:47 AM  
K-50 / K-500 Aperture Solenoid fix (DIY with pics)
Posted By bigyinn
Replies: 417
Views: 109,599
Just a heads up for those that need a white solenoid, the MZ-7 also has two white solenoids. One for releasing the flash and one for the aperture block. The flash release one is easier to get at, although you do have to remove the top plate. The one for the aperture block is attached to a ribbon cable rather than individual wires and is harder to remove.
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