Hello,
thanks for reply.
the flux issue can be right, i will check this tommorow
Its a 18,5" Screen (widescreen) mounted to the controller.
I had some cases with the old version of that controller type EX5440-CG11
(not balled IC,same devices) but by this type also it was not need to recalibrate the touch.
Note: i orderd the EXC3188-FG31 by same supplier were i also bought the EX5440-CG11 and they was perfectly working.
But the flux theory is a really possible thing, i will try tommorow and repost result
