| 摘要 |
PURPOSE:To normally display a picture even when the irregularity is produced at the time of working and assembling of an electrode by controlling the gain of plural signal amplifier and output circuits. CONSTITUTION:The two outputs of a D/A converter 39 are inputted to the signal amplifier and output circuits 43, 43', the two outputs V1, V1' and V2, V2' of the circuits 43, 43' are supplied to one conductor 13 and the other conductor 13' of a vertical deflection electrode 4. At the time of the working and the assembling of the electrodes 13, 13', when they are assembled in an irregular mode, an uneven picture having the difference in amplitude between the central part and the peripheral part of a picture is obtained. In such a case, the amplitude of the circuits 43, 43' is individually controlled by the gain control circuit 44, thereby, adjusted so as to have the even picture.
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