Originally posted by DMITRY1 Greetings,
Suddenly my previously flawless K-70 is underexposing images in all modes. I used two different modern lenses, and it's not a lens problem.
Camera is 3 years old. Only 3,200 actuations.
Just checked the solenoid, using this helpful tutorial
How to detect aperture-block failure/stuck solenoid on Pentax K-70 - PentaxForums.com
And it appears that it is indeed stuck. I only get correctly-exposed photos at f/16.
What should I do, in your opinions, get it fixed, or buy another Pentax body?
Another sample of low shuttercount! Was your K-70 not used for a longer period?
Would be worthwhile to know!
If you didn't buy some special extended warranty, then of course after 3 years there is no more warranty.
A socalled professional fix is not safe in a long term, because it will be the same China-made solenoid, the Japan-DSLR-Solenoid is out of production since the K-x/K-r! Warranty for repair is max. 1 yr and cases when this went wrong do show up, particular as Precision Cameras occasionally messes up things and at times retreats to very strange behaviour:
Ricoh GR III scroll wheel problem (not regarding wobbly control dial) - PentaxForums.com
Repair it yourself, it is not very difficult!
If you really can't DIY and you won't find anybody who could do it for you,
then these days I'd even consider
PC35lab:
They sand/file the plunger but it is only $100 plus shipping and they seem to give a long warranty, I even heard of unlimited warranty.
Read carefully this article:
Why you shouldn't file/sand the plunger of the green Chinasolenoid but replace it - PentaxForums.com
and then it is up to you to find the best solution.
The correct conducted repair is shown here*
Tutorial/Repair Pentax K-70 with aperture-problem: Exchange solenoid - PentaxForums.com
will not only guarantee that the solenoid won't be stuck ever again but your K-70.... a great Pentax... will perform better!
The Japan solenoid fires faster, with "finely tuned ears" you can even hear the difference when it actuates.
*@jatrax: Your link is for the K-30, not the K-70!