(with brief instructions in Chinese, Google English Translation Here)
Note that the "hacker" has successfully re-assemble his K10D unit afterwards. It seems that he has very good techniques and skills.
Besides, the same "hacker" also dissembled his Nikon D80 and posted the photos before:-
http://dcbbs.zol.com.cn/1/37_241.html
If the design of the Nikon is compared to the Pentax, one obvious thing is that it can be seen that the electromagnetic shielding and grounding of Nikon is done in a much better and more complete/robust way than the Pentax, which probably could improve noise and can provide better electromagnetic interference immunity. See this:-
(Inside the Nikon D80)Related:-
http://ricehigh.blogspot.com/search/label/Camera%20Hacking