Here are two guides I wrote sometime back for a nice cheap and fairly easy repair for those pesky 5200 controllers.
Here is the non-flash/BW step-by-step guide
http://members.cox.net/crossbow777/g...gd/5200_rep_gd
And here is a simplied version of that same guide as a Flash presentation...
http://members.cox.net/crossbow777/g...00_basic_flash
Enjoy...