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【故障原因提要】(1)视放供电滤波电容漏电、漏液、虚焊。(2)12V供电电压纹波增大、滤波不良。(3)15V供电电压纹波增大、滤波不良。(4)晶振不良或虚焊。【快修方法提要】(1)更换视放供电滤波电容。(2)更换12V供电滤波元件。(3)更换15V供电滤波元件。(4)更换晶振。【故障快修实例】故障现象:一台用汇佳第五代数码彩板改装的74cm29英寸)组装彩电,使用6个月后,出现如下故障现象:有图、有声、有彩色,但图像中夹杂着类似木纹家具
【Summary of the cause of the malfunction】 (1) depending on the power supply filter capacitor leakage, leakage, Weld. (2) 12V supply voltage ripple increases, poor filtering. (3) 15V supply voltage ripple increases, poor filtering. (4) bad crystal or Weld. [Quick repair method summary] (1) replace the visual amplifier power supply filter capacitor. (2) Replace 12V power supply filter components. (3) Replace 15V power supply filter components. (4) change the crystal. Fault fast repair example】 Symptom: a use of Huijia fifth-generation digital color board modified 74cm29 inch) assembled color TV, after 6 months, the following symptoms: a picture, sound, color, but the image Mixed with similar wood furniture