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例23 东鹏950型故障现象:该机使用一年后读碟能力太差。分析与检修:经开机观察,部分碟片可以正常播放,但有少数碟片随着播放时间的延长,停顿越来越频繁,直至无法收看,关机一小时后再开机,仍重复上述现象。根据现象分析,可能是机内某元件发热引起,打开机盖检查,发现驱动集成块 BA6395FP 发热严重,其紧贴的线路板因长期过热而变色。三端稳压块LM7808、7805和驱动块 BA6395FP 也发热严重,于是
Example 23 Dongpeng 950 failure phenomenon: the machine after reading the disc using a year after the poor performance. Analysis and Maintenance: After the boot, some discs can play normally, but a few discs with the extension of playing time, more and more pause until unable to watch, shut down an hour after the boot, still repeat the above phenomenon. According to the phenomenon analysis, it may be a component of the machine caused by fever, open the lid inspection and found that the drive block BA6395FP serious heat, the close circuit board due to long-term overheating and discoloration. Three-terminal regulator block LM7808,7805 and driver block BA6395FP also fever, so