| 摘要 |
PURPOSE:To reject a color picture tube having a remnant gas release source in a funnel flute more effectively by lowering the heater voltage, increasing the cathode current, increasing the anode voltage, and allowing more electrons from the cathode to hit the funnel flute. CONSTITUTION:After each process of the discharge, getter flash, high voltage process, and cathode aging is completed, a voltage several % higher than the rating is applied from a power supply 28 to the fourth grid 14 connected to an anode terminal 5 through an inner conducting film 4, the rating voltage is applied from a power supply 19 to the third grid 13 and the rating voltage is applied from a power supply 20 to the second grid 12 respectively, the first grid 11 is directly grounded, the heater 9 voltage is lowered by several % from its rating, the cathode current shown on an ammeter 16 is increased by several % from its rating, and a running is performed for scores minutes under such a condition that an electron beam 31 also hits the funnel flute section 61 of a funnel 6 by adjusting the position of a deflection york or using other deflection york. |
