贴片式集成电路在VCD中被广泛应用。因该集成电路引脚较密,这就给业余更换集成电路带来了一定的困难。本人在近几年的VCD检修中,在没有专用焊接设备的情况下,更换贴片式集成电路几十块,效果不错。具体做法如下,以供同行参考。 1.先拆下坏集成块:在拆集成块之前,要注意集成块①脚的位置,如果电路板上无标记,应在电路板上做好标记。在拆下坏集成块时,不能将电路板上的铜箔 Chip integrated circuits are widely used in VCD. Due to the densely packed pins of the integrated circuit, this presents some difficulties for the amateur to replace the integrated circuit. In the past few years, I VCD overhaul, in the absence of special welding equipment, the replacement of dozens of chip integrated circuits, the effect is good. Specific practices are as follows, for peer reference. 1. First remove the bad blocks: Before demolition of blocks, pay attention to the position of the block ① feet, if the board is not marked, should be marked on the circuit board. When removing bad manifolds, do not remove the copper foil from the circuit board