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故障现象:通电开机,发现机内有冒烟现象。故障原因:打开机盖,通电试机,发现TV编码器U1031(CS4954-CQ)(参见图1)冒烟。根据此故障现象,说明编码器U1031(CS4954-CQ)或U1031外接元件引线或元器件焊点有短路现象。
Symptom: power on, found that there is smoke inside the machine. Fault reason: Open the cover, power test machine and found TV encoder U1031 (CS4954-CQ) (see Figure 1) smoke. Based on this symptom, it indicates that there is a short-circuit in the lead wire or component solder joint of encoder U1031 (CS4954-CQ) or U1031 external component.