And for those who are interresed in, my blade still works 
After some unexplicable USB errors , like cgminer has unexpected ended , now both blades works for 2 days. No problems no errors, so the soldering interventions seems to be succsessfull.The replaced Mosfet seems to work, the replaced AME8805 seems to work, and the STM32 ,too. They accumulate a lot of heat , but as i told , i apply a backwards fan, so i hope this is enough. In Germany are now 19 C° Outside and inside are 28 C° , even all my windows are open.And I only run the 2 Blades and an Antminer S1.
After some unexplicable USB errors , like cgminer has unexpected ended , now both blades works for 2 days. No problems no errors, so the soldering interventions seems to be succsessfull.The replaced Mosfet seems to work, the replaced AME8805 seems to work, and the STM32 ,too. They accumulate a lot of heat , but as i told , i apply a backwards fan, so i hope this is enough. In Germany are now 19 C° Outside and inside are 28 C° , even all my windows are open.And I only run the 2 Blades and an Antminer S1.