(1)开机图像模糊不清,需几分钟后渐渐好转,这一般是聚焦极氧化漏电所致,需将显像管座GE801拆下用无水酒精清洗,如效果不明显,最好换新。 (2)接收某些频道时伴音沙哑且不大,而已有蜂音,这一般是鉴频回路线圈T_(302)失效。因该机出厂时此线圈均未采用漆或蜡进行封固,而且内附电容日久变质。建议检修时将T_(302)内附电容去掉,重新焊上一51pF电容于线路板上,然后调准磁芯后用蜡封固即可。 (3)光栅呈“S”形扭曲,伴音中夹杂着“嗡”声,但很小,此故障多为电源整流滤波电容C_(706)(150μF,400V)容 (1) boot image blurred, a few minutes after the gradual improvement, which is generally due to focus oxide leakage caused by the need to remove the seat tube seat GE801 with anhydrous alcohol, such as the effect is not obvious, the best new. (2) When some channels are heard, the sound is hoarse and not loud, but the buzzing sound is already existed. This is usually the failure of the frequency loop T_ (302). Due to the aircraft factory did not use this coil of paint or wax for sealing, but also with the capacitor deterioration over time. It is recommended to remove the capacitor T_ (302) and re-solder a 51pF capacitor on the circuit board. Then align the core and seal with wax. (3) The grating is twisted in “S” shape with “Om” sound mixed in the sound, but it is very small. The fault mostly is the power rectifier filter capacitor C_ (706) (150μF, 400V)