To repair a relatively unfamiliar circuit board of an injection molding machine without any principle, the so-called "experience" in the past is difficult to make a difference.

When injection molding products, bubbles and voids appear, and the voids inside can be seen from the outside of generally transparent products.

How to judge whether the circuit board of the injection molding machine is faulty is a matter of concern to every injection molding machine management and maintenance personnel.