论文部分内容阅读
七、水平一条亮线故障很显然该故障出在场扫描电路,它由场扫描前级和场扫描后级组成。场扫描前级在LA7688AN中,后级由LA7837及场偏转线圈组成。水平一条亮线故障的检修流程如图18所示。八、图像淡、雪花噪声点大此故障一般因为整机对电视信号的放大能力下降所造成,故障部位主要在天线输入电路、高频调谐器及图像通道等部分。其检修流程如图19所示。
Seven, the level of a bright line fault It is clear that the fault out of the field scanning circuit, which consists of field scanning before the field level scanning and composition. Field scan level in the LA7688AN, after the stage by the field deflection coil LA7837 and composition. The level of a bright line troubleshooting process shown in Figure 18. Eight, the image light, snow noise point This failure is generally due to the machine on the television signal amplification caused by the drop, the main fault location in the antenna input circuit, high-frequency tuner and image channels and other parts. The repair process shown in Figure 19.