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厦新VCD—777型视盘机解码系统常见故障现象有:无显示、无图无声、无图有声、有图无声、图像不良、选片能力差等。 1.无显示:开机屏幕无蓝背景、无OSD显示、无重放功能。这类故障一般是CL680未能进入工作状态造成,检查重点是CL680正常工作的4个条件是否同时成立?CL680采用表面贴焊,在外部条件满足前提下,应仔细检查CL680各引脚与线路焊点接触是否良好?引脚之间有无短路焊珠?铜箔线条有无划痕、折断?
Xiaxin VCD-777-type video decoder decoding system common symptoms are: no display, no picture no sound, no pictures and sound, a picture silent, poor image, poor selection ability and so on. 1. No display: no blue background boot screen, no OSD display, no playback. Such failures are generally CL680 failed to enter the working state, check the focus is CL680 normal work of the four conditions are also established? CL680 using surface mount welding, external conditions to meet the premise, we should carefully check the CL680 pin and line welding Point of contact is good? There is no short circuit between the solder beads? Copper lines without scratches, broken?