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例14故障现象:TCL LCD32K73液晶彩电,没有声音。分析与检修:首先开机测试,切换不同的信号,发现所有信号都没有声音。根据故障现象和试机结果,初步分析故障可能在声音处理部分。声音的处理流程为:AV和TV的信号在U104(4052)中完成切换工作后,送到音频处理电路U105(BD3888FS)中进行处理,高清音频信号和VGA的伴音是直接进入U105处理的。因为所有信号的通路同时损坏的可能很小,于是将问题集中
Example 14 Symptom: TCL LCD32K73 LCD TV, there is no sound. Analysis and Maintenance: First, turn on the test, switch different signals and found that all signals are no sound. According to the symptoms and test results, preliminary analysis of the fault may be part of the sound processing. Audio processing flow: AV and TV signals in the U104 (4052) to complete the switch work, sent to the audio processing circuit U105 (BD3888FS) for processing, high-definition audio signals and VGA sound is directly into the U105 processing. Since all the signal paths are likely to be damaged at the same time, the problem is concentrated