| 摘要 |
PURPOSE:To eliminate variance in manufacturing deflecting yokes and to increase yield of deflecting yokes by changing the amount of correction of trimmer by adjusting the amount of bias current supplied to a bias coil. CONSTITUTION:A pair of horizontal deflecting coils 2, 3 and a pair of vertical deflecting coils 13, 14 are provided in a deflecting yoke, and impedance coils 5, 6 are connected in series to coils 2, 3 respectively. These series circuits are connected in parallel and horizontal deflecting current is applied from a horizontal deflecting circuit 7. Coils 5, 6 are wound on cores 9, 10 of separate E1 shaped closed magnetic circuit, and bias coils 11, 12 that generate bias magnetic flux and vertical deflecting coils 13, 14 are provided in each of cores 9, 10. DC current rectified by a diode 15 is supplied to coils 11, 12. Vertical deflecting coils 17, 18 are connected in series to vertical deflecting coils 13, 14, and vertical deflecting current is supplied from a vertical deflecting circuit 19. Variance in manufacturing deflecting coils is eliminated by coils 11, 12. |
