Originally posted by JerzyJ Does the change in selonoid mounting really fix problem occuring in earlier models? As I looked many users said that failure was due to cheaply made „green type” of selonoid- the same as seen in photos above... As for me it looks like Pentax ingeneers said „lets switch sides of this screw and tell people that we changed design of aperture block, no money invested in quality and they stop complain for a while”.
I don't think so.
When Ricoh noticed the problem the K-S1 and K-S2 where already out.
They could not change the design anymore, it would involve not necesserely a rise in voltage but a rise in milli-amperes (or both). This is why often (at least for a while) the K30/50/500 would work with Eneloops, because they allow higher surge.
Sometimes people even noticed that the problem with the Li-Ion battery was stronger when it was fully charged.
I strongly believe the engineers found out too late, for a long time hoped it would not be that big and when it finally turned out that it was big, it was too late, the K-S1 and 2 were in the shops! I also believe that they then already did something, there was a massive "outlet sale" of K-S1's and K-S2's on the EU market (particular Germany), I believe they took new ones back into repair and modified something and sold them as ex-dem units!
Usually it is not engineers which make wrong decisions, its the econo-mist (mist in German = dung!)
But the engineers get slapped! They are forced to follow "those, who don't know a thing" but "pretend to know everything"
Originally posted by stevebrot ...but none of the very few reports on this sight have been confirmed to involve the aperture control block*.
K-70 Underexposed Photo Reports - PentaxForums.com
* More properly, "Diaphragm Control Block", the proper assembly name in the Pentax parts lists.
Because repaired at Pentax.
With all K70's repaired and reported in Germany Ricoh wrote that it was the "Magnetschalter", which is the German translation for solenoid (magnetic switch)
Last edited by photogem; 03-24-2019 at 11:12 AM.