Cura going to 204C instead of 200C
Its mainly due to the regulation loop of the PID Regulator implemented in the Firmware of the Da vinci jr. The P-Factor is a little bit too high. This is the reason why the temperature "overshoots". Because the Printerhead and Nozzle has some volume which is heated up. It takes time to cool down after it has detected an overshoot. 

here you can find additional informations about it: https://innovativecontrols.com/blog/basics-tuning-pid-loops