jake_lighthouse Posted December 25, 2016 Share Posted December 25, 2016 I've been working on a Pentax K1000 for a while, the internals are all standard but I've added the improved pieces that were used as the manufacturing continued. Anyway I all of a sudden had issues with the film advance lever jamming and the mirror not coming down etc... After I'd already corrected all the issues this camera had internally. So it was frustrating to say the least. But I eventually came to the conclusion that the arm that shows you advanced the film was the culprit. I take it all apart and find it is bent and chewed up, and so forth. Interesting that this little piece that's just a convenience was the cause of all these problems!<div></div> Link to comment Share on other sites More sharing options...
John Seaman Posted December 25, 2016 Share Posted December 25, 2016 <p>Jake, thanks for this.</p> <p>Was one of the issues with the camera, the horrible black shape in the finder, which I've seen on my last 3 examples? I think it's either desilvering or fungus on the prism (definitely not the focus screen , which were clean).</p> Link to comment Share on other sites More sharing options...
paul_wheatland Posted December 25, 2016 Share Posted December 25, 2016 <p>I have a late k1000 with black debris above the screen. I believe foam rubber light blocking material in the prism housing has rotted and the goo has fallen to the top side of the screen. It's a shame as the camera and lens are mint and function as the should. Repair requires removal of the top deck which at my age is no longer in the cards, heath, eyesight, nimbleness and cost involved.</p> Link to comment Share on other sites More sharing options...
John Seaman Posted December 25, 2016 Share Posted December 25, 2016 <p>Paul, tell me about it.</p> Link to comment Share on other sites More sharing options...
jake_lighthouse Posted December 25, 2016 Author Share Posted December 25, 2016 Yes there is foam that deteriorates around the prism. It isn't necessary to replace this foam. But that stuff makes one heck of a mess of the prism. The task of getting to the prism isn't that hard, the tricky part is getting all that foam out of there which I used a small flat head, a q-tip, small paint brush, toothpick, and acetone. You'll want to do your best to remove it without getting it on the focusing screen and try not to get anymore on the prism itself. But acetone will take it off the prism... The focusing screen can be trickier as it is very sensitive. Once you clean all that foam out put the prism back BEING CAREFUL NOT TO OVER TIGHTEN THE SCREWS! that will chip your prism. Also use a soft paint brush to wipe the dust from the focusing screen and make sure you wipe all finger prints from the prism. If you don't do all of this thoroughly you will just hate yourself later lol Pictures to follow.<div></div> Link to comment Share on other sites More sharing options...
jake_lighthouse Posted December 25, 2016 Author Share Posted December 25, 2016 Continued...<div></div> Link to comment Share on other sites More sharing options...
jake_lighthouse Posted December 25, 2016 Author Share Posted December 25, 2016 So on...<div></div> Link to comment Share on other sites More sharing options...
jake_lighthouse Posted December 25, 2016 Author Share Posted December 25, 2016 So forth...<div></div> Link to comment Share on other sites More sharing options...
andrewg_ny Posted December 28, 2016 Share Posted December 28, 2016 <p>Jake, thanks for sharing!</p> Link to comment Share on other sites More sharing options...
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