| 摘要 |
PURPOSE:To reduce the number of regulation processes of a TV picture receiver by directly coupling a regulating motor with the regulated variable resistor of the TV picture receiver, by receiving a special signal, projected on a Braun tube, by an ITV camera, and by controlling the motor by the output. CONSTITUTION:To regulated variable resistors 14a and 14b on printed substrate 13 of unregulated color TV picture receiver 11, driver units 2a and 2b coupled directly with stepping motors 7a and 7b are connected. A special signal from signal generating circuit 16 is supplied to antenna terminal 15 of the picture receiver and two marker lines are projected on Braun tube 12. This picture is taken by ITV cameras 1a and 1b, the marker lines are extracted by marker detecting circuit 17, and distances l1-l4 from a horizontal synchronizing signal to the markers are measured by distance measuring circuit 19; and comparing arithmetic circuit 21 calculates distance differences L=l2-l1 and L'=l4-l3 and unit L/L' reaches fixed number K, motor 7b is driven so as to adjust vertical size adjusting resistance 14b. Next, focus adjusting resistance 14a is adjusted by driving motor 7a so that the maximum crest value of one center marker can be obtained. |
