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笔者曾检修两种长虹 C2919PK 画中画彩电“软”故障,均经他人检修未果,送修我处的。由于故障不稳定,再加上长虹 C2919PK 彩电电路复杂,给检修造成一定的难度,笔者三次上门检修,从电路工作原理分析入手,找到故障部位;在未更换元件的情况下,采用更改电路的方法修复,获取检修经验。后来又遇到该机几例类似故障,如此照修,立竿见影,现介绍给读者。
I had to repair two Changhong C2919PK picture in picture color TV “soft” failure, were unsuccessful maintenance by others, repair my office. Due to the instability of the fault, coupled with Changhong C2919PK color TV circuit is complex, causing some difficulties to the overhaul, the author three on-site overhauls, starting from the circuit working principle to find the fault site; the case of not replacing the components, the use of circuit changes Repair, access maintenance experience. Then encountered a few cases of similar aircraft failure, so care, immediate, is introduced to the reader.