Originally posted by fcrespo hi peterh337, that is impressive. I am too electronics engineer by education, and can follow, to a certain point, your reasoning. Very interesting story of the Nokia case.
The Pentax guys are clever, no doubt. If they have not implemented a firmware fix yet, is because there are likely unacceptable side effects, or simply because it doesn't fix the problem due to reason X that we don't know.
One of the big praises of the K3 is that it is much faster than the K5 (faster processor, screen, GUI, etc). This has a cost in power, and surely we see that battery life is shorter than K5's (24% reduction according to IR review).
According to Fujitsu, new image processor (aka PRIME 3 in Pentax land) requires
less energy than PRIME 2 from K5. Papers say 30% less. New stabilisation unit? Hard to say. Perhaps more than before. New mirror motors? Perhaps more.
But still it says nothing as the issue in question is most likely not related to power depletion. Apparently, it was created with a camera fully connected to DC as well.
Quote: Now, if the K3 power system is flawed or underdesigned, what to do? A major call-back action? A firmware fix to limit camera performace? Not easy.
Callback? You already know all cameras produced are faulty?
Firmware fix? So you already know what is the issue and that it can be solved via firmware update?
Quick answer to both ideas is no. Not so fast in prescribing any cure.
So far, not a single person reporting the issue has offered any viable explanation. Side-effects of the issue, yes, we have heard about them — at least those side-effects visible to users without proper testing equipment. Flapping is visible, sound is audible, but a big iceberg of information below the surface of user's reach, and which is visible to proper testing equipment, is unknown to users.
The root cause is far from being assessed. It is still unknown.
Thus offering any "solution" or "prescription" is not viable, nor it will solve anything. Again, it is our impulsive nature of forceful problem solving at all cost, using whatever shortcut. Best course of action is document each individual issue, assemble them in a document and send to Ricoh Imaging Japan, asking their opinion and offering user's assistance.
But if you want to kill some time before that, maybe you may move investigation a few good steps forward and get a hi-speed video camera for slow motion analysis, together with a highly sensitive camera for thermal stress analysis. Point in closely at the mirror box and start recording, carefully monitoring what is going on.