故障现象:无声、无光有“吱吱”叫声。查系行管击穿。换后开机,主电源135V稳定,图、声恢复,但图像严重畸形失真,两侧成“拱形”,台标、时间显示溢出屏外,图像略有扩大,有时关机后能听见很轻的放电声,没有高压打火声清脆。分析与检修:因为修图像失真是重点,那极偶然的打火声就未加深思。当时只不过是有一种想法可能是显像管地线脱落。查了枕形电路很久查不出什么问题。后来干脆将行场振荡集成块TA8759、场输出块 Symptoms: silent, dull “creak” sounds. Check line management breakdown. Change the boot, the main power 135V stable, picture, sound recovery, but the image serious deformity distortion, both sides into an “arched”, Taiwan standard, time display overflow screen, the image slightly expanded, and sometimes can hear a very light shutdown Discharge sound, no high-pressure fire crisp. Analysis and Maintenance: Because repairing the image distortion is the focus, that very accidental fire is not thought to deepen. At that time, there was only one idea that the CRT ground wire might fall off. Check the pincushion circuit for a long time to find out what the problem. Later, the market will simply block oscillation block TA8759, field output block