100% of assembled PCBs are under optical control. This control is carried out by FDL520 machine by MARANTZ company or by microscope and zooming tool. Many customers demand soldering and control according to IPC-A-610, therefore final optical control is done by 3D microscope. It is possible to clean assembled boards in automatic large-capacity Super-SWASH machine or in ultrasonic machine. Cleaning will eliminate flux residuals left on board after soldering. These residuals could affect the durability of the board. If the board is supposed to be lackered, cleaning is necessary.