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例1故障现象:长虹LSl0机芯液晶彩电,搜台时漏台。分析与检修:检查TV板及其外围电路,发现其调谐电压不足33 V,判断为倍压电路问题,经仔细检查,发现C224和C226异常。将其更换后搜台,正常。例2故障现象:长虹LSl0机芯液晶彩电,开机后“黑屏”。分析与检修:检查屏电压正常,初步判断U105(MST5151A)有问题,检查其外围供电均无电压,判断出
Example 1 Symptom: Changhong LSl0 movement LCD color TV, when Taiwan leak stage. Analysis and Maintenance: Check the TV board and its peripheral circuits and found that the tuning voltage is less than 33 V, to determine the doubling circuit problems, after careful examination and found C224 and C226 abnormalities. Search after its replacement, normal. Example 2 Symptom: Changhong LSl0 movement LCD color TV, boot “black screen ”. Analysis and Maintenance: Check the screen voltage is normal, initially determine the U105 (MST5151A) have problems, check the external power supply are no voltage, determine