The K200D allows you to make a single global adjustment through the debug menu, which isn't very helpful since the degree of FF/BF varies from lens to lens. Your best bet would probably be to upgrade the camera body to a K-50 as sending it in for adjustment would probably be overkill.
Here's a nice resource thread on AF adjustments:
https://www.pentaxforums.com/forums/53-pentax-dslr-camera-articles/61385-auto...ent-hints.html
And this article explains how to test for it:
Fixing Front and Back Focus - Introduction - PentaxForums.com Adam
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