“虚焊”是排除电器故障中既容易又棘手的问题。容易是因为找到故障元件后补焊一下即可;棘手是因为故障出现无规律、持续时间和间隔不定、元件定位比较困难。虚焊产生的原因:1.元件引脚表面氧化处理不彻底。2.发热较大的元件热胀冷缩现象使元件引脚与焊锡之间产生缝隙,电路时通时断。虚焊处理的方法:首先要确定是否为真正“虚焊”。暂且将“虚焊”分为两类:第一类.元件引脚 “Weld ” is to troubleshoot electrical problems both easy and difficult. Easily because it can be found after the repair of welding components can be troublesome; because of irregularities occur irregularities, duration and interval uncertainties, component positioning more difficult. Weld causes: 1. Component pin surface oxidation is not complete. 2. Larger components of the thermal expansion and contraction of components so that the gap between the pins and solder, the circuit off when broken. Weld method of treatment: First of all, to determine whether the real “Weld ”. For the time being “Weld ” is divided into two categories: The first category. Component pin