Originally posted by Not a Number If you look at the photos of the inside of a K-70 (registration required to view) on the German pentaxians.de forum you can see the K-70 uses a redesigned diaphragm control block that uses a the same or similar looking solenoid as the K-30/50/K-S1/K-S2.
Tutorial - Reparatur Pentax K-70 Blendensteuerung Solenoid ? Pentaxians
The solenoid body on the earlier cameras is parallel with the lens mount. On the K-70 the solenoid is at a 45° angle. One forum member said that Ricoh told him and another member that the K-70 uses a different mechanism from the earlier models.
The solenoid being in a 45° angle would not be able to work!
Better have a closer look at
the posted photo there
Maybe you can notice that there are no screws nor a plunger on the solenoid!
The person who did the repair unscrewed it to take the plunger off.
If you would have followed this thread (just be looking at it, no need to understand, pics speak so-to-say for themselves) you might have come across
This foto showing the solenoid in position.
The guy there did the "dreaded" grinding method, in the Pentax K30 part I shall post soon some photos showing why this sanding method is not to be recommended: The plunger when in action tilts with a noticable degree and brings too much force to the complicated mechanism.
If one undertakes the repair, then best with the white "made in Japan" solenoid only.