Originally posted by paolo11 The company called dslrparts has been around for a long time. Recently, they have set up Pentax camera repair. Above, is a cut and paste from their web site. I called and sent e-mail, but haven't heard back yet. This is all they do, fix aperture problems. so Pentax has known about this problem for years.
dslrparts has been around for a long time, but their sister site pentaxcamerarepair has only been around for a few months (domain registered Aug 20, 2016 with site active in October). They did not offer repair services before this Autumn. The list of affected cameras on their home page represents those known to have a similar aperture control block, not those with reported failures. To the best of my knowledge,* aperture control block failure such as reported for the K-30/K-50 has been limited to those models, the K-500 (few), and K-S2 (rare).
As for long-term culpability by Pentax spanning multiple bodies, that is conjecture. As noted on many posts on this site, the aperture control block issue first appeared on this site about 16 months after the K-30's 2012 introduction and not long after the K-50 launch. I participated in the first troubleshooting requests and remember well the puzzlement regarding the rash of sudden failures of what had been a relatively trouble-free body. The reports continued as K-50 bodies aged with no real indication as to what components were failing. I personally sent a K-50 in for repair in early 2015 and Precision replaced both the electronic controller and the mechanical parts...not exactly a surgically precise repair. It has only been fairly recently that the mechanical actuator solenoid has been the focus of the online user investigation. Presumably, that is the part being replaced by Ricoh/Pentax and is what is repaired by pentaxcamerarepair.** So much for that series.
Before the K-30, back to 2007 when I joined this forum, I don't recall reports for other models with similar symptoms. Online forums are very sensitive to any product issues and lack of reported issues is a strong indicator of product strength. If there is a history of aperture controller block failure in Pentax dSLRs, the bread trail ends with the K-30.
Steve
* The "best of my knowledge" is the experience of cooperative learning as an active member of Pentax Forums since Spring of 2007 along with the recent surveys conducted by Pentax Forums.
**
How they repair this issue (used parts?) is not stated on their site Edit: recently changed to indicate a modification of the aperture controller block, nor is the effectiveness of the fix beyond their promise to warranty the repair for a year. What was known about the problem at Pentax and when it was first fully characterized is unknown. What is known is that it is likely that the full initial production run of K-50 was finished and the K-30 was out of production before the K-30 failures started occurring. Did Pentax "dump" defective product hoping that nobody would notice? That is possible, of course, but would have been incredibly stupid.