The following issues should be noted when replacing thyristors:

1. When replacing the thyristors, the first thing to pay attention to is several faces: the two faces of a thyristor, and the face of the upper and lower radiator. First, paying attention to the surface can not have pits, hair, debris, these will affect the heat dissipation. The second is to pay attention to check the radiator surface to make it flat, if there is an oxide layer or surface going into a concave or edge, there must not be a sandpaper to grind, there are some conditions in advance to mill a knife, This is good for conducting electricity and heat.

2，When replacing the thyristors, it must be put positively, put positively to coincide with the original print, in order to be conducive to electrical and thermal conductivity, and only put positively to press positively, so as not to use the force biased and crush the thyristor.

3，The pressure should be sufficient, it is best to spread a little butter on the tip of the top wire in order to transfer the force to the thyristors, which is conducive to conducting heat and conduction.