Grid-correction circuit for tv sets.

The invention claims a screen correcting circuit in television device. With the technical to send in an experiment signal to the deflection circuit is generally, and mobile the deflecting current the deflection switch circuit in comparison with a reference value with comparing, and obtaining with the signal gradually change a test deflecting current and a current deflecting. The problem that flowing solve is a removing screen deflecting current the rotary of the preset value time up and down. The invention cover with a test of rotary installed in the non-visible part, and is wherein a screen deflecting current to obtain the adjusting when the three deflecting current and preset value deviation multiple step.